| Organization | Links | Recs | Related | Infra | Image |
|---|
| M&M Superstore | 1 | | | | |
| Maccabbee Lodge | 2 | | | | |
| Macfield Industries | 1 | | | | |
| Mack Manufacturing Co | 1 | 5 | | | |
| Mack Paving Co | 1 | 4 | | | |
| Mackay Companies | 1 | 11 | 1 | | |
| Mackie-Lovejoy Manufacturing Co | 1 | 3 | | | |
| Mackinaw and Marquette Railroad | 2 | 10 | | | |
| MacNamara Mining Co | 1 | 7 | | | |
| Macon and Brunswick Railroad | 1 | 15 | | | |
| Macon and Western Railroad | 1 | 33 | | | |
| Madeira Hill Coal Mining Co | 2 | 3 | | | |
| Madeira, Hill and Co | 2 | 5 | | | |
| Madeira-Hill-Clark Coal Co | 2 | 5 | | | |
| Maderia-Hill-Clark Coal Co | 1 | 8 | | | |
| Madison Coal Co | 1 | 3 | | | |
| Madison Gas and Electric Co | 1 | 9 | 1 | | |
| Madison River Power Co | 1 | 7 | | | |
| Madison Safe Deposit Co | 1 | 14 | | | |
| Magna Charta Dames and Barons | 1 | | | | |
| Mahanoy and Broad Mountain Railroad | 3 | 12 | | | |
| Mahoning and Shenango Railway and Light Co | 2 | 15 | | | |
| Mahoning Ore and Steel Co | 1 | 5 | | | |
| Maiden Lane Realty Co | 1 | 4 | | | |
| Main Street Railroad | 3 | 3 | | | |
| Maine Central Railroad | 3 | 119 | | 🚂 | |
| Maine Constitutional Convention | 1 | | | | |
| Maine Peace Society | 1 | | | | |
| Maine Temperance Society | 2 | | | | |
| Maine Womens Hall of Fame | 1 | | | | |
| Major League Baseball | 107 | | | |  |
| Malcolm Mills Co | 1 | 2 | | | |
| Malden and Melrose Gas Light Co | 1 | 13 | | | |
| Malden Electric Co | 1 | 13 | | | |
| Malden Savings Bank | 2 | 24 | | |  |
| Mallory Steamship Co | 1 | 11 | 1 | | |
| Malta-Vita Pure Food Co | 1 | 2 | | | |
| Mammoth Copper Mining Co | 1 | 9 | 1 | | |
| Mammoth Vein Coal and Tron Co | 1 | 7 | | | |
| Manchester and Lawrence Railroad | 3 | 19 | | | |
| Manchester and North Weare Railroad | 1 | 8 | | | |
| Manchester Mills | 1 | 3 | | | |
| Manchester Street Railway | 1 | 2 | | | |
| Manchester Traction Light and Power Co | 1 | 16 | | | |
| Manganese Steel Safe Co | 1 | 14 | | | |
| Manhasset Manufacturing Co | 1 | 5 | | | |
| Manhattan Co | 1 | 15 | | | |
| Manhattan County School | 1 | | | | |
| Manhattan Elevated Railway | 1 | 6 | | | |
| Manhattan Railway | 5 | 48 | | | |
| Manhattan Storage and Warehouse Co | 3 | 6 | | | |
| Manhattan Trust Co | 1 | 4 | | | |
| Manistee Railroad | 3 | 18 | | | |
| Manistee, Filer City and East Lake Railroad | 1 | 14 | | | |
| Manistique and Lake Superior Railroad | 1 | 25 | | | |
| Manistique and Northern Railroad | 2 | 9 | | | |
| Manistique Railway | 2 | 24 | | | |
| Manistique, Marquette and Northern Railroad | 1 | 17 | | | |
| Manitou Mining Co | 3 | 5 | | | |
| Manomet Mills | 1 | 12 | | | |
| Manor Gas Coal Co | 2 | 7 | | | |
| Mansfield, Coldwater and Lake Michigan Railroad | 1 | 31 | | | |
| Manufacturers and Traders Bank of Buffalo | 1 | 37 | | | |
| Manufacturers Mutual Fire Insurance Co | 4 | 23 | | | |
| Manville Co | 3 | 14 | | | |
| Marburg Tobacco Co | 1 | | | | |
| Marconi Wireless Telegraph Co of America | 1 | 19 | | | |
| Marietta and Cincinnati Railroad | 2 | 74 | 1 | | |
| Marine Bank of Norfolk | 1 | 1 | | | |
| Marine National Bank of Milwaukee | 1 | 13 | | |  |
| Marion Coal Gas Co | 1 | 5 | | | |
| Marion County Record | 1 | | | | |
| Maritime Commission | 1 | | | | |
| Market and Fulton National Bank of New York | 1 | 19 | | | |
| Market Street Elevated Passenger Railway | 2 | 6 | | | |
| Market Street National Bank of Philadelphia | 1 | 18 | | |  |
| Marquette and Iron Range Railroad | 2 | 7 | | | |
| Marquette and Ontonagon Railroad | 2 | 25 | | | |
| Marquette and State Line Railroad | 1 | 10 | | | |
| Marquette and Western Railway | 6 | 34 | | | |
| Marquette, Houghton and Ontonagon Railroad | 11 | 86 | | | |
| Marsden Co | 1 | 5 | | | |
| Marshall Light Co | 1 | 5 | | | |
| Maryland Agricultural Society | 1 | | | | |
| Maryland and Delaware Railroad | 2 | 1 | | | |
| Maryland and Pennsylvania Railroad | 1 | 16 | | | |
| Maryland and Virginia Medical Journal | 1 | 1 | | | |
| Maryland Constitutional Convention | 25 | | | | |
| Maryland Cooperative Milk Producers | 1 | | | | |
| Maryland Geological Survey | 1 | | | | |
| Maryland Homeopathic Society | 2 | 10 | | | |
| Maryland Medical Journal | 1 | 6 | | | |
| Maryland Public Service Commission | 2 | | | | |
| Maryland Society of the Cincinnati | 1 | | | | |
| Maryland State Colonization Society | 2 | | | | |
| Maryland Steel Co | 3 | 20 | 1 | 🚂 | |
| Maryland Telephone Co | 2 | 8 | | | |
| Maryland Treasurer | 1 | | | | |
| Maryland Womens Hall of Fame | 15 | | | | |
| Maryland, Delaware and Virginia Railway | 1 | 5 | | | |
| Mason-Hoge Railroad Construction Co. | 2 | | | | |
| Masonic Lodge | 1 | | | | |
| Massachusetts Anti-Slavery Society | 2 | | | | |
| Massachusetts Bonding and Insurance Co | 3 | 37 | | | |
| Massachusetts Central Railroad | 1 | 3 | | | |
| Massachusetts Constitutional Convention | 7 | | | | |
| Massachusetts Cotton Mills | 4 | 8 | | | |
| Massachusetts Electric Companies | 1 | 22 | | | |
| Massachusetts Gas Companies | 6 | 15 | | | |
| Massachusetts Horticultural Society | 2 | 14 | | | |
| Massachusetts Hospital Life Insurance Co | 18 | 34 | | | |
| Massachusetts Lighting Companies | 1 | 7 | | | |
| Massachusetts Mills in Georgia | 4 | 8 | | | |
| Massachusetts Republican Party | 1 | | | | |
| Massachusetts State Bar Association | 1 | | | | |
| Massachusetts Volunteer Aid Association | 1 | | | | |
| Massachusetts Woman Suffrage Association | 1 | | | |  |
| Massena Terminal Railroad | 1 | 6 | | | |
| Massillon Coal Mining Co | 1 | 8 | | | |
| Massillon Electric and Gas Co | 1 | 8 | | | |
| Massillon Water Supply Co | 1 | 3 | | | |
| Master of the Buckhounds | 9 | | | | |
| Master of the Harriers | 2 | | | | |
| Master of the Horse | 17 | | | | |
| Master of the Mint | 4 | | | | |
| Master-General of the Ordnance | 2 | | | | |
| Mathews Consolidated Slate Co | 2 | 4 | | | |
| Mathieson Alkali Works | 1 | 3 | | | |
| Mattoon Gas Light and Coke Co | 1 | 7 | | | |
| Mauch Chunk and Switch Back Railroad | 2 | 8 | | | |
| Maverick Miles | 1 | 6 | | | |
| Maxwell House Coffee | 1 | | 1 | | |
| Mayflower Mining Co | 2 | 7 | | | |
| Maysville Eagle | 2 | | | | |
| McAvoy Brewing Co | 1 | 2 | | | |
| McCallie Preparatory School for boys | 1 | | | | |
| McCalls Ferry Power Co | 1 | 1 | | | |
| McClintic-Marshall Construction Co | 2 | 15 | | 🚂 | |
| McGaw Laboratories | 1 | | | | |
| McGehee Contruction and McGehee Hotel Companies | 1 | | | | |
| McKeesport Connecting Railroad | 1 | 19 | | | |
| McKesson Robins, Inc. | 1 | | | | |
| McLachlen Banking Co | 1 | 4 | | | |
| Mead Johnson Co | 4 | | | | |
| Mead-Morrison Manufacturing Co | 1 | 4 | | | |
| Mechanical Manufacturing Co | 1 | 3 | | | |
| Mechanics and Farmers Bank of Albany | 2 | 13 | | | |
| Mechanics and Metals National Bank of New York | 8 | 47 | | |  |
| Mechanics Bank | 1 | | | | |
| Mechanics Bank of New Haven | 3 | 11 | | | |
| Mechanics Bank of New York | 2 | 26 | | | |
| Mechanics National Bank of Providence | 1 | 9 | | | |
| Mechanics Savings Bank of Hartford | 1 | 19 | | | |
| Medical and Surgical Reports Boston City Hospital | 3 | 23 | | | |
| Medical Compend | 1 | 2 | | | |
| Medical Society of New Jersey | 1 | | | | |
| Medical Society of Virginia | 1 | | | | |
| Mediterranean Squadron | 7 | | | | |
| Mellon National Bank of Pittsburgh | 8 | 31 | | | |
| Melones Mining Co | 1 | 8 | | | |
| Memphis and Charleston Railroad | 1 | 75 | | | |
| Memphis and Little Rock Railroad | 1 | 22 | | | |
| Memphis and Ohio Railroad | 1 | 20 | | | |
| Memphis Consolidated Gas and Electric Co | 1 | 10 | | | |
| Memphis Cotton Exchange | 1 | | | | |
| Menominee and St Paul Railroad | 2 | 7 | | | |
| Menominee River Railroad | 2 | 10 | | | |
| Mercantile Fire and Marine Insurance Co | 1 | 8 | | | |
| Mercantile National Bank of Dallas | 1 | | | | |
| Mercantile Safe Deposit Co | 4 | 15 | | | |
| Mercantile Trust Co | 8 | 40 | | |  |
| Mercedita Sugar Co | 1 | 10 | | | |
| Merchants And Miners Transportation Co | 1 | 15 | | | |
| Merchants Bank of Buffalo | 1 | 23 | | | |
| Merchants Cold Storage | 1 | | | | |
| Merchants Despatch Transportation Co | 4 | 33 | | | |
| Merchants Exchange National Bank of New York | 1 | 18 | | | |
| Merchants Fire Assurance Corporation of New York | 1 | 13 | | | |
| Merchants Loan and Trust Co | 1 | 35 | | | |
| Merchants Mutual Fire Insurance Co | 1 | 4 | | | |
| Merchants Mutual Insurance Co | 1 | 1 | | | |
| Merchants National Bank of Boston | 17 | 42 | | |  |
| Merchants National Bank of New Bedford | 1 | 3 | | | |
| Merchants National Bank of New Haven | 1 | 21 | | | |
| Merchants National Bank of Norwich | 2 | 14 | | | |
| Merchants National Bank of Philadelphia | 1 | 16 | | | |
| Merchants National Bank of Richmond | 1 | 9 | | |  |
| Merchants Real Estate Trust | 1 | 3 | | | |
| Merchants Trust Co | 1 | 30 | | | |
| Merchants Union Trust Co | 1 | 5 | | | |
| Merchants-Mechanics National Bank of Baltimore | 5 | 27 | | |  |
| Mergenthaler Linotype Co | 2 | 17 | | | |
| Merion and Radnor Gas and Electric Co | 4 | 7 | | | |
| Merrick and Sons Iron Foundry | 2 | | | 🚂 | |
| Merrimac and Connecticut Rivers Railroad | 3 | 15 | | | |
| Merrimack Manufacturing Co | 5 | 11 | | | |
| Merrimack Mills | 1 | | | | |
| Mesta Machine Co | 1 | 7 | | | |
| Methodist | 1 | 2 | | | |
| Methodist General Conference | 3 | | | | |
| Methodist Mens Brotherhood | 1 | | | | |
| Methuen Co | 1 | 4 | | | |
| Metro-Goldwyn-Mayer Studios Inc. | 2 | | | | |
| Metropolitan Associates | 1 | 3 | | | |
| Metropolitan Casualty Insurance Co of New York | 1 | 16 | | | |
| Metropolitan Club | 8 | | | | |
| Metropolitan Insurance Co. | 1 | | | | |
| Metropolitan Life Insurance Co | 5 | 156 | | | |
| Metropolitan Museum of Art | 9 | 38 | | | |
| Metropolitan National Bank of Boston | 1 | 11 | | | |
| Metropolitan National Bank of Washington | 1 | 4 | | |  |
| Metropolitan Opera and Real Estate Co | 6 | 15 | | | |
| Metropolitan Opera Co | 4 | 16 | | | |
| Metropolitan Railroad | 4 | 26 | | | |
| Metropolitan Savings Bank of Baltimore | 1 | 13 | | |  |
| Metropolitan Securities Co | 1 | 7 | | | |
| Metropolitan Storage Warehouse Co | 2 | 8 | | | |
| Metropolitan Street Railway | 1 | 36 | | | |
| Metropolitan Trust Co of New York | 6 | 34 | | | |
| Mexican Central Railway | 8 | 203 | | | |
| Mexican International Railroad | 1 | 29 | | | |
| Mexican National Railroad | 6 | 82 | | | |
| Mexican Northern Railway | 1 | 8 | | | |
| Mexican Telegraph Co | 4 | 19 | | | |
| Mexico and Pacific Railroad | 1 | 4 | | | |
| Miami Coal Co | 1 | 2 | | | |
| Miami Dolphins | 2 | | | | |
| Michigan Air Line Railroad | 17 | 78 | 1 | | |
| Michigan and Ohio Railroad | 2 | 44 | | | |
| Michigan Blueberry Growers Association | 1 | | | | |
| Michigan Car Co | 1 | | | | |
| Michigan Central Railroad | 47 | 524 | 1 | |  |
| Michigan Chemical Co | 1 | 3 | | | |
| Michigan Constitutional Convention | 2 | | | | |
| Michigan Journal of Education | 1 | 2 | | | |
| Michigan Midland and Canada Railroad | 14 | 34 | | | |
| Michigan Shore and Eastern Railroad | 1 | 7 | | | |
| Michigan Southern and Northern Indiana Railroad | 13 | 120 | | | |
| Michigan Southern Railroad | 4 | 60 | | | |
| Michigan State Telephone Co | 1 | 19 | | | |
| Michigan Traction Railroad | 1 | 21 | | | |
| Michigan Womens Hall of Fame | 6 | | | | |
| Mid City Citizens Association | 2 | 28 | | | |
| Middlesex Agricultural Society | 1 | | | | |
| Middlesex Electric Light and Power Co | 2 | 4 | | | |
| Middletown and Cincinnati Railroad | 1 | 7 | | | |
| Middletown Car Co | 2 | 6 | | | |
| Midland Terminal Railway | 1 | 20 | | | |
| Midland Valley Railroad | 1 | 19 | | | |
| Midvale Steel Co | 1 | 30 | | | |
| Miles College | 1 | | | | |
| Milford Electric Light and Power Co | 1 | 6 | | | |
| Milford National Bank | 2 | 2 | | | |
| Military Department of the Columbia | 1 | | | | |
| Military Division of the Atlantic | 3 | | | | |
| Military Division of the Missouri | 3 | | | | |
| Military Division of the Pacific | 4 | | | | |
| Military Division of the South | 2 | | | | |
| Military Order of Foreign Wars | 12 | | | | |
| Military Order of the Loyal Legion of the United States | 41 | | | | |
| Military Order of the Purple Heart | 1 | | | | |
| Mill River Electric Light Co | 1 | 5 | | | |
| Millbourne Mills Co | 2 | 7 | | |  |
| Millbrook Co | 1 | 2 | | | |
| Miller & Rhodes Department Store | 1 | | | | |
| Millwood Coal & Coke Co | 1 | 1 | | | |
| Milton Light and Power Co | 2 | 3 | | | |
| Milton Water Co | 2 | 6 | | | |
| Milwaukee and Beloit Railroad | 2 | 22 | | | |
| Milwaukee and Chicago Railroad | 1 | 4 | | | |
| Milwaukee and Mississippi Railroad | 1 | 55 | | | |
| Milwaukee and Northern Railroad | 1 | 59 | | | |
| Milwaukee and St Paul Railway | 2 | 45 | | | |
| Milwaukee and Watertown Railroad | 1 | 31 | | | |
| Milwaukee Avenue State Bank of Chicago | 1 | 5 | | | |
| Milwaukee Braves | 4 | | | | |
| Milwaukee Brewers | 4 | | | | |
| Milwaukee Electric Railway and Light Co | 1 | 17 | 1 | | |
| Milwaukee Gas Light Co | 1 | 15 | | | |
| Milwaukee Sentinel | 1 | 3 | | | |
| Milwaukee, Benton Harbor and Columbus Railway | 1 | 20 | | | |
| Milwaukee, Lake Shore and Western Railway | 10 | 86 | | | |
| Mine Hill and Schuylkill Haven Railroad | 1 | 31 | | | |
| Mine Run Furnace | 1 | 4 | | | |
| Mineral Range Railroad | 7 | 120 | | | |
| Minneapolis and St Louis Railroad | 7 | 160 | | 🚂 | |
| Minneapolis Gaslight Co | 1 | 7 | | | |
| Minneapolis General Electric Co | 12 | 22 | 1 | | |
| Minneapolis Real Estate Associates | 1 | 3 | | | |
| Minneapolis Street Railway | 1 | 4 | | | |
| Minneapolis Tribune | 1 | 5 | | | |
| Minneapolis, Sault Ste Marie and Atlantic Railway | 5 | 18 | | | |
| Minneapolis, St Paul and Sault St Marie Railway | 8 | 163 | 1 | | |
| Minnesota Academy of Science | 3 | 18 | | | |
| Minnesota and Northwestern Railroad | 1 | 28 | | | |
| Minnesota and Pacific Railroad | 1 | 5 | | | |
| Minnesota Central Railway | 1 | 19 | | | |
| Minnesota Constitutional Convention | 1 | | | | |
| Minnesota Iron Co | 2 | 13 | 1 | | |
| Minnesota State Auditor | 1 | | | | |
| Minnesota Steel Co | 1 | 5 | | | |
| Minnesota Twins | 8 | | | | |
| Minnesota Valley Railroad | 2 | 23 | | | |
| Minor League Baseball | 56 | | | | |
| Missisquoi Railroad | 1 | 4 | | | |
| Mississippi and Missouri Railroad | 3 | 30 | | | |
| Mississippi and Tennessee Railroad | 2 | 26 | | | |
| Mississippi Central Railroad | 1 | 49 | | | |
| Mississippi Constitutional Convention | 1 | | | | |
| Mississippi Educational Journal | 1 | | | | |
| Mississippi River Commission | 1 | 11 | | | |
| Mississippi River Power Co | 1 | 6 | | | |
| Mississippi Valley Medical Association | 4 | 4 | | | |
| Missouri and Kansas Telephone Co | 2 | 18 | | | |
| Missouri and North Arkansas Railroad | 1 | 10 | | | |
| Missouri Constitutional Convention | 1 | | | | |
| Missouri Library Association | 1 | 7 | | | |
| Missouri Pacific and Wabash, St Louis and Pacific Railwa | 1 | 3 | | | |
| Missouri Pacific Railway | 27 | 756 | 1 | |  |
| Missouri Valley Medical Association | 1 | 1 | | | |
| Missouri, Kansas and Texas Railway | 12 | 634 | | |  |
| Mistress of the Robes | 9 | | | | |
| Mobile and Montgomery Railroad | 2 | 16 | | | |
| Mobile and Ohio Railroad | 15 | 204 | | | |
| Mobile Gas Co | 1 | 3 | | | |
| Modern Woodmen of America | 1 | | | | |
| Mohawk and Hudson Railroad | 2 | 3 | | | |
| Mohawk Valley Co | 5 | 16 | 4 | | |
| Mohigan Oil and Gas Co | 1 | 5 | | | |
| Moneyweight Scale Co | 2 | 4 | | | |
| Monongahela City Gas Light Co | 1 | 4 | | | |
| Monongahela Connecting Railroad | 1 | 24 | | | |
| Monongahela River Consolidated Coal and Coke Co | 3 | 30 | 1 | | |
| Monongahela Street Railway | 1 | 3 | | | |
| Monongahela Trust Co | 2 | 16 | | | |
| Monongahela Water Co | 1 | 19 | | | |
| Monroe and Toledo Railroad | 1 | 5 | | | |
| Monroe Connecting Railroad | 2 | 7 | | | |
| Monroe Oil Co | 1 | | | | |
| Montana State Auditor | 1 | | | | |
| Montana, Wyoming and Southern Railroad | 1 | 5 | | | |
| Montclair Water Co | 2 | 5 | | | |
| Montezuma Copper Co | 1 | 8 | 1 | | |
| Montgomery and Eufaula Railroad | 1 | 4 | | | |
| Montgomery and West Point Railroad | 1 | 10 | | | |
| Montgomery Convention | 1 | | | | |
| Montgomery Light and Water Power Co | 1 | 14 | | | |
| Montgomery Light Co | 1 | 5 | | | |
| Montgomery Southern Railroad | 1 | 3 | | | |
| Montgomery Ward and Co | 1 | 8 | | | |
| Monthly Nautical Magazine and Quarterly Review | 1 | | | | |
| Monticello Association | 1 | | | | |
| Montour Iron Works | 1 | | | | |
| Montreal Expos | 2 | | | | |
| Montreal Quilting Co | 1 | 1 | | | |
| Montreal Telegraph Co | 1 | 13 | | | |
| Montrose Railway | 1 | 4 | | | |
| Moody Bible Institute | 1 | 4 | | | |
| Moore Spinning Co | 1 | 4 | | | |
| Moose Lodge | 2 | | | | |
| Moran Brothers Co | 1 | 6 | | | |
| Morenci Southern Railway | 1 | 8 | | | |
| Morgan Iron Works | 2 | 6 | | | |
| Morgan Stanley | 3 | | | | |
| Morning Star | 1 | 29 | | | |
| Morris and Essex Railroad | 3 | 56 | | | |
| Morris Canal and Banking Co | 1 | 1 | | | |
| Morris Plan Co of Rhode Island | 6 | 39 | | | |
| Morris, Wheeler and Co | 1 | 3 | | | |
| Mortgage Trust Co of Pennsylvania | 2 | 21 | | | |
| Mortgage-Bond Co of New York | 3 | 35 | | | |
| Moseley Iron Bridge and Roof Co | 1 | | | 🚂 | |
| Moshassuck Valley Railroad | 1 | 5 | | | |
| Mothers Against Drunk Driving (MADD) | 1 | | | | |
| Motorsports Hall of Fame of America | 1 | | | | |
| Mounds and Olive Branch Railroad | 1 | 2 | | | |
| Mount Hope Spinning Co | 1 | 5 | | | |
| Mount Vernon Ladies Association | 1 | | | | |
| Mountain States Telephone and Telegraph Co | 1 | 1 | 2 | | |
| Mt Olive Coal Co | 1 | 2 | | | |
| Mt Pleasant and Western Railroad | 1 | 7 | | | |
| Mt Pleasant Citizens Association | 1 | 44 | | | |
| Mt Tom Sulphite Pulp Co | 1 | 4 | | | |
| Muncie Electric Light Co | 1 | 5 | | | |
| Muncie Gas Works | 1 | 4 | | | |
| Municipal Gas Co | 1 | 13 | | | |
| Municipal Gas Co of West Troy | 1 | 4 | | | |
| Municipal Gas Co of Yonkers | 1 | 6 | | | |
| Municipal Real Estate Trust | 1 | 5 | | | |
| Murchison National Bank | 3 | 20 | | |  |
| Museum of Modern Art | 1 | | | | |
| Museum of Science and Industry | 1 | | | | |
| Musical America | 1 | 6 | | | |
| Muskegon Street Railway | 1 | 8 | | | |
| Muskegon Traction and Lighting Railroad | 2 | 27 | | | |
| Muskegon Traction Railroad | 1 | 5 | | | |
| Muskegon, Grand Rapids and Indiana Railroad | 1 | 19 | 1 | | |
| Mutual Assurance Co | 2 | 12 | | | |
| Mutual Bank of New York | 1 | 16 | | | |
| Mutual Benefit Life Insurance Co | 1 | 21 | | | |
| Mutual Boiler Insurance Co | 3 | 12 | | | |
| Mutual Electric Light Co | 1 | 5 | | | |
| Mutual Fire Insurance Co of Germantown | 1 | 14 | | |  |
| Mutual Fire, Marine and Inland Insurance Co | 1 | 10 | | | |
| Mutual Gas Light Co of Savannah | 2 | 4 | | | |
| Mutual Life Insurance Co | 1 | 28 | | | |
| Mutual Life Insurance Co of New York | 5 | 50 | | | |
| Mutual Life Insurance Company of New York | 1 | | | | |
| Mystic Wharf and Storage Co | 1 | 5 | | | |
| M. A. Donohue and Co | | 5 | | | |
| M. A. Gunst and Co | | 16 | | | |
| M. A. Leeson and Co | | | | | |
| M. A. Newmark and Co | | 40 | | | |
| M. and D. Range Co | | 3 | | | |
| M. B. Austin and Co | | 3 | | | |
| M. B. Suydam Co | | 3 | | | |
| M. Bonn Co | | 3 | | | |
| M. Born and Co | | 3 | | | |
| M. C. Bullock Manufacturing Co | | 2 | | | |
| M. Dencer Co | | 2 | | | |
| M. Donnerstag Co | | 3 | | | |
| M. E. Cunningham Co | | 3 | | | |
| M. H. Shaw Co | | 4 | | | |
| M. H. Wolfe and Co | | 9 | | | |
| M. J. Helm Storage Co | | 4 | | | |
| M. J. Powers Co | | 2 | | | |
| M. L. Barrett and Co | | 5 | | | |
| M. L. Nelson Co | | 2 | | | |
| M. L. Shoemaker and Co | | 2 | | | |
| M. M. Bear Co | | 4 | | | |
| M. Meyerhoff Shoe Co | | 2 | | | |
| M. N. Cartier and Sons Co | | 6 | | | |
| M. P. Byrne Construction Co | | 4 | | | |
| M. P. Exline Co | | 99 | | | |
| M. R. Gray Co | | 12 | | | |
| M. S. Bulkley and Co | | 8 | | | |
| M. S. Fleishman Co | | 3 | | | |
| M. Schulz Co | | 4 | | | |
| M. T. and S. Kennedy Co | | 3 | | | |
| M. W. Powell Co | | 5 | | | |
| Macallen Co | | 5 | | | |
| MacArthur Brothers Co | | 8 | | | |
| Macbeth-Evans Glass Co | | 6 | | | |
| MacCrellish and Quigley | | | | | |
| Macdonald Engineering Co | | 2 | | | |
| MacDonald, McCoy and Co | | 2 | | | |
| Macdonell, Hood and Callender Co | | 2 | | | |
| Macedonia State Bank | | 1 | | | |
| Machinists Supply Co | | 5 | | | |
| Mack Motor Truck Co | | 5 | | | |
| Mackie-Foley Co | | 10 | | | |
| Mackinac and Chicago Railroad | | 9 | | | |
| Mackinac and Lake Superior Railroad | | 7 | | | |
| Mackinac Transportation Co | | 5 | | | |
| Mackinaw Enterprise-Gazette | | 2 | | | |
| Mackintosh, Hemphill and Co | | 10 | | | |
| Mackolite Fire Proofing Co | | 7 | | | |
| Macmillan Co | | 14 | | | |
| MacMillan Publishing Co | | 8 | | | |
| MacNab and Harlin Manufacturing Co | | 8 | | | |
| Macomb and Saginaw Railroad | | 7 | | | |
| Macomb Gas Works | | 2 | | | |
| Macomb Journal | | 2 | | | |
| Macomb Mcdonough Times | | 2 | | | |
| Macomber and Whyte Rope Co | | 2 | | | |
| Macon and Birmingham Railway | | 12 | | | |
| Macon County Times | | 2 | | | |
| Macon Gas and Electric Light Co | | 4 | | | |
| Macon Gas Light and Water Co | | 10 | | | |
| Macon, Dublin and Savannah Railroad | | 23 | | | |
| Macoupin County Enquirer | | 2 | | | |
| Macullar Parker Co | | 5 | | | |
| Macungie Iron Co | | 3 | | | |
| Mad River and Lake Erie Railroad | | 29 | | | |
| Madeira and Mamore Railroad in Brazil | | 5 | | | |
| Madera Mining Co | | 9 | | | |
| Madera Water Co | | 4 | | | |
| Madison and Indianapolis Railroad | | 9 | | | |
| Madison Book Co | | 3 | | | |
| Madison City Gas Light and Coke Co | | 3 | | | |
| Madison County Gas and Electric Co | | 3 | 1 | | |
| Madison County Light and Power Co | | 7 | | | |
| Madison County News | | 2 | | | |
| Madison Furnace | | 2 | | | |
| Madison Gas Light Co | | 3 | | | |
| Madison Hardware Co | | 3 | | | |
| Madison Light and Railway | | 2 | | | |
| Madison National Bank | | 1 | | | |
| Madison Square Garden Co | | 9 | | | |
| Madison, Portage City and Lake Superior Railroad | | 14 | | | |
| Madsen Iron Works | | 4 | | | |
| Madson and Steele Co | | 2 | | | |
| Magee Furnace Co | | 4 | | | |
| Magnesia Covering Co | | 4 | | | |
| Magnolia Metal Co | | 3 | | | |
| Magnolia Mills | | 12 | | | |
| Magnus Co | | 5 | | | |
| Magnus Metal Co | | 8 | | | |
| Mahaffey National Bank | | 1 | | | |
| Mahanoy City Electric Light, Heat and Power Co | | 5 | | | |
| Mahanoy City Gas Co | | 7 | | | |
| Mahin Advertising Co | | 2 | | | |
| Mahomet Bank of Mahomet | | 1 | | | |
| Mahomet Sucker State | | 2 | | | |
| Mahoning Investment Co | | 6 | | | |
| Mahoning Iron Works | | 2 | | | |
| Mahoning State Line Railroad | | 3 | | | |
| Maiden Lane Savings Bank | | 20 | | | |
| Maidencreek Iron Co | | 2 | | | |
| Maier Brewing Co | | 36 | | | |
| Mail and Express Co | | 6 | | | |
| Maine Agricultural Experiment Station | | 7 | | | |
| Maine Farmer | | 4 | | | |
| Maine Library Association | | 3 | | | |
| Maine State Highway Commission | | 4 | | | |
| Maine Telegraph Co | | 8 | | | |
| Majestic Hotel Co | | 6 | | | |
| Majestic Mines Co | | 12 | | | |
| Major Film Manufacturing Co | | 5 | | | |
| Makaweli Sugar Co | | 6 | | | |
| Malden City Lumber Co | | 3 | | | |
| Malden Coal Co | | 3 | | | |
| Malden Cooperative Bank | | 1 | | | |
| Malden Trust Co | | 23 | | | |
| Mallory Commission Co | | 6 | | | |
| Malone Bank of Malone | | 1 | | | |
| Malone Light and Power Co | | 6 | | | |
| Maloney-Blue Lead Copper Mining and Smelting Co | | 6 | | | |
| Maltine Co | | 6 | | | |
| Mammoth Cave Railroad | | 2 | | | |
| Mammoth Lode Mining and Milling Co | | 5 | | | |
| Mammoth Vein Coal Co | | 2 | | | |
| Manahawkin and Long Beach Transportation Co | | 5 | | | |
| Manassas Gap Railroad | | 19 | | | |
| Manayunk National Bank | | 12 | | | |
| Manayunk Sentinel | | 1 | | | |
| Manayunk Trust Co | | 21 | | | |
| Mancelona and North Western Railroad | | 5 | | | |
| Manchester and Homer Railroad | | 7 | | | |
| Manchester and Hudson Co | | 3 | | | |
| Manchester and Oneida Railway | | 11 | | | |
| Manchester Electric Co | | 9 | | | |
| Manchester Light and Power Co | | 3 | | | |
| Manchester Locomotive Works | | 1 | 1 | | |
| Manchester Realty Co | | 2 | | | |
| Manchester Savings Bank and Trust Co | | 16 | | | |
| Manchester Star | | 2 | | | |
| Manchester, Dorset and Granville Railroad | | 1 | | | |
| Manchester, Sheffield and Lincolnshire Railway | | 8 | | | |
| Mandel Brothers | | 5 | | | |
| Mandell Lumber Co | | 3 | | | |
| Manganese Steel Rail Co | | 2 | | | |
| Manhattan American | | 1 | | | |
| Manhattan Beach Estates | | 11 | | | |
| Manhattan Beach Railway | | 2 | | | |
| Manhattan Brewing Co | | 3 | | | |
| Manhattan Co-Operative Real Estate Co | | 10 | | | |
| Manhattan Consolidated Gold Mines Co | | 7 | | | |
| Manhattan Electrical Supply Co | | 7 | | | |
| Manhattan Furniture Co | | 5 | | | |
| Manhattan Ice Cream Co | | 2 | | | |
| Manhattan Iron Works Co | | 3 | | | |
| Manhattan Life Insurance Co | | 44 | | | |
| Manhattan Light, Heat and Power Co | | 3 | | | |
| Manhattan Market Co | | 3 | | | |
| Manhattan Mortgage Co | | 9 | | | |
| Manhattan Nationalist | | 1 | | | |
| Manhattan Navigation Co | | 9 | | | |
| Manhattan Novelty Co | | 3 | | | |
| Manhattan Real Estate Association | | 7 | | | |
| Manhattan Savings Institution | | 23 | | | |
| Manhattan Securities Co | | 8 | | | |
| Manhattan Shirt Co | | 10 | | | |
| Manhattan Transit Co | | 17 | | | |
| Manhattan Trap Rock Co | | 8 | | | |
| Manierre-Yoe Syrup Co | | 3 | | | |
| Manistee and Grand Rapids Railroad | | 38 | | | |
| Manistee and Luther Railroad | | 18 | | | |
| Manistee and Northeastern Railroad | | 49 | | | |
| Manistee Gas Light and Coke Co | | 3 | | | |
| Manistee Light and Traction Co | | 10 | | | |
| Manistee Light and Traction Railroad | | 16 | | | |
| Manistique and Northwestern Railroad | | 16 | | | |
| Manistique Bank of Manistique | | 1 | | | |
| Manito Community Express | | 3 | | | |
| Manitoba and Northwestern Railway | | 11 | | | |
| Manitoba Electric and Gas Light Co | | 3 | | | |
| Manitou and Pikes Peak Railway | | 6 | | | |
| Manitou Steamship Co | | 2 | | | |
| Manitowoc Dry Dock Co | | 3 | | | |
| Manitowoc Gas Co | | 3 | | | |
| Mankato Gas and Electric Light Co | | 6 | | | |
| Mankato State Bank | | 1 | | | |
| Mann's Creek Railroad | | 2 | | | |
| Manning, Maxwell and Moore | | 24 | | | |
| Manns Boudoir Car Co | | 3 | | | |
| Manor Real Estate And Trust Co | | 3 | | | |
| Manown Manufacturing Co | | 8 | | | |
| Mansfield Daily News | | 3 | | | |
| Mansfield Electric Light and Power Co | | 7 | | | |
| Mansfield Express | | 2 | | | |
| Mansfield Gas and Electric Light Co | | 2 | | | |
| Mansfield Gas Light Co | | 9 | | | |
| Mansfield Railway and Transportation Co | | 5 | | | |
| Mansfield Realty Co | | 3 | | | |
| Mansfield Telephone Co | | 17 | | | |
| Mansmann Brothers Co | | 4 | | | |
| Manson Lumber Co | | 4 | | | |
| Manteno Independent | | 1 | | | |
| Manton Mutual Fire Insurance Co | | 10 | | | |
| Manton State Bank | | 2 | | | |
| Manufactured Rubber Co | | 6 | | | |
| Manufacturers and Consumers Agency Co | | 2 | | | |
| Manufacturers Bank of Pittsburgh | | 9 | | | |
| Manufacturers Commercial Co | | 17 | | | |
| Manufacturers Gas Co | | 1 | | | |
| Manufacturers Gas Light Co | | 3 | | | |
| Manufacturers Liability Insurance Co of New Jersey | | 11 | | | |
| Manufacturers Light and Heat Co | | 24 | | | |
| Manufacturers National Bank of Kansas City | | 1 | | | |
| Manufacturers National Bank of Lewiston | | 1 | | | |
| Manufacturers National Bank of Lynn | | 1 | | | |
| Manufacturers National Bank of Newark | | 1 | | | |
| Manufacturers National Bank of Pemberton | | 1 | | | |
| Manufacturers National Bank of Philadelphia | | 9 | | | |
| Manufacturers National Bank of Waterbury | | 1 | | | |
| Manufacturers Paper Co | | 10 | | | |
| Manufacturers Railway | | 12 | | | |
| Manufacturers Refining Co | | 4 | | | |
| Manufacturers Stove Repair Co | | 2 | | | |
| Manufacturers Water Co | | 8 | | | |
| Manufacturers-Citizens Trust Co | | 35 | | | |
| Manufacturing Jewelers Board of Trade | | 15 | | | |
| Many, Blanc and Co | | 2 | | | |
| Maple Rapids and Lansing Railroad | | 8 | | | |
| Maple Rapids and Southern Railroad | | 7 | | | |
| Maramec Iron Co | | 3 | | | |
| Marble Head Lime Co | | 2 | | | |
| Marble Savings Bank of Rutland | | 1 | | | |
| Marble-Swift Automobile Co | | 3 | | | |
| Marble-Swift Manufacturing Co | | 3 | | | |
| Marblehead Gas and Electric Light Co | | 3 | | | |
| Marcell Mines | | 4 | | | |
| Marconi Wireless Telegraph Co of Canada | | 6 | | | |
| Marcus and Co | | 2 | | | |
| Marcus Gross Co | | 5 | | | |
| Marden and Howell | | | | | |
| Marengo Republican-News | | 2 | | | |
| Maricopa, Phoenix and Salt River Valley Railroad | | 10 | | | |
| Marietta and North Georgia Railway | | 11 | | | |
| Marietta Gas Co | | 3 | | | |
| Marietta, Columbus and Cleveland Railroad | | 13 | | | |
| Marine Bank | | 4 | | | |
| Marine Bank of Buffalo | | 23 | | | |
| Marine Construction and Dry Dock Co | | 3 | | | |
| Marine Engineering | | 2 | | | |
| Marine Iron Works | | 4 | | | |
| Marine Manufacturing and Supply Co | | 13 | | | |
| Marine National Bank of Bath | | 1 | | | |
| Marine National Bank of Pittsburgh | | 9 | | | |
| Marine National Bank of Wildwood | | 1 | | | |
| Marine Review | | 1 | | | |
| Mariner Harbor National Bank | | 20 | | | |
| Mariner Publishing | | | | | |
| Marinette Lighting Co | | 4 | | | |
| Marinette, Tomahawk and Western Railroad | | 5 | | | |
| Marion and Mississinewa Valley Railroad | | 10 | | | |
| Marion and Rye Valley Railroad | | 3 | | | |
| Marion Brick Works | | 3 | | | |
| Marion county Bank of Flippin | | 1 | | | |
| Marion Gas Co | | 7 | | | |
| Marion Gas Light Co | | 3 | | | |
| Marion Insulated Wire and Rubber Co | | 7 | | | |
| Marion Light, Heat and Power Co | | 5 | | | |
| Marion Railroad | | 16 | | | |
| Marion Record | | 2 | | | |
| Marion Steam Shovel Co | | 3 | | | |
| Marion Water Co | | 6 | | | |
| Marissa Messenger | | 2 | | | |
| Maritime Association of the Port of New York | | 15 | | | |
| Maritime Coal, Railway and Power Co | | 12 | | | |
| Mark Clancy Printing Co | | 3 | | | |
| Mark Sarazan and Co | | 3 | | | |
| Marked Tree Lumber Co | | 3 | | | |
| Market Bank of New York | | 1 | | | |
| Market Chart Co | | 2 | | | |
| Market Savings Bank of Toledo | | 4 | | | |
| Market Street Steam Railroad | | 2 | | | |
| Market Street Title and Trust Co | | 4 | | | |
| Market Trust Co | | 16 | | | |
| Marlboro Cotton Mills | | 11 | | | |
| Marlboro Savings Bank | | 2 | | | |
| Marlboro Shoe Co | | 3 | | | |
| Marlborough Electric Co | | 7 | | | |
| Marlborough Gas Light Co | | 3 | | | |
| Marlborough Railroad | | 5 | | | |
| Marlborough-Hudson Gas Co | | 5 | | | |
| Maroa News-Times | | 3 | | | |
| Marquette and Bessemer Dock and Navigation Co | | 8 | | | |
| Marquette and Peninsula Railroad | | 7 | | | |
| Marquette and Southeastern Railway | | 16 | | | |
| Marquette Catering Co | | 2 | | | |
| Marquette Cement Co | | 3 | | | |
| Marquette City and Presque Isle Railroad | | 22 | | | |
| Marquette County Electric Railway | | 3 | | | |
| Marquette County Gas and Electric Co | | 8 | | | |
| Marquette County Gas Light and Traction Railroad | | 5 | | | |
| Marquette Gas Light Co | | 4 | | | |
| Marquette Iron Range Cable Transit Railroad | | 7 | | | |
| Marquette Piano Co | | 3 | | | |
| Marquette State Bank | | 1 | | | |
| Marquette, Champion and Chicago Railroad | | 5 | | | |
| Marquette, Negaunee and Ishpeming Interurban Railroad | | 7 | | | |
| Marquette, Sault Ste Marie and Mackinac Railroad | | 8 | | | |
| Marseilles Daily Press | | 3 | | | |
| Marseilles Land and Water Power Co | | 2 | | | |
| Marsh and Bingham Co | | 3 | | | |
| Marsh, Aitken and Curtis Co | | 2 | | | |
| Marsh-Strong Building | | 17 | | | |
| Marshall and Coldwater Railroad | | 13 | | | |
| Marshall and East Texas Railroad | | 2 | | | |
| Marshall and Huschart Machinery Co | | 3 | | | |
| Marshall and Northern Railroad | | 7 | | | |
| Marshall and Russell Gold Mining, Milling and Tunnel Co | | 7 | | | |
| Marshall Brothers and Mathew Express Co | | 4 | | | |
| Marshall Field and Co | | 16 | | | |
| Marshall Gas Light Co | | 7 | | | |
| Marshall Heat, Light and Power Co | | 5 | 1 | | |
| Marshall Herald | | 3 | | | |
| Marshall Iron Co | | 2 | | | |
| Marshall Light and Power Co | | 4 | | | |
| Marshalltown Gas Co | | 4 | | | |
| Marshalltown State Bank | | 1 | | | |
| Martel Furnace | | 2 | | | |
| Martha Vineyard Street Railway | | 1 | | | |
| Martin and Posey Art Co | | 3 | | | |
| Martin and William H. Nixon Paper Co | | 2 | | | |
| Martin Brick Co | | 2 | | | |
| Martin-Copeland Co | | 5 | | | |
| Martinsburg Gas Co | | 7 | | | |
| Marvin Manufacturing Co | | 4 | | | |
| Mary Lee Coal and Railway Co | | 3 | | | |
| Mary McKinney Mining Co | | 6 | | | |
| Mary Pratt Furnace Co | | 3 | | | |
| Maryland Buffet and Cafe Co | | 3 | | | |
| Maryland Casualty Co | | 46 | | | |
| Maryland Central Railroad | | 9 | | | |
| Maryland Coal Co | | 10 | | | |
| Maryland Coal Co of West Virginia | | 11 | | | |
| Maryland Dental Society | | 28 | | | |
| Maryland Dredging and Contracting Co | | 9 | | | |
| Maryland Medical and Surgical Journal | | 2 | | | |
| Maryland Medical Recorder | | 1 | | | |
| Maryland National Bank of Baltimore | | 1 | | | |
| Maryland Pharmacists Association | | 8 | | | |
| Maryland Securities Co | | 6 | | | |
| Maryland State Health Department | | 7 | | | |
| Maryland, Pennsylvania and West Virginia Telephone and Telegraph Co | | 3 | | | |
| Marysville Canal and Improvement Co | | 5 | | | |
| Marysville Coal Gas Co | | 2 | | | |
| Marysville Light and Water Co | | 7 | | | |
| Mascoma Electric Light and Gas Co | | 6 | | | |
| Mascoutah Herald | | 2 | | | |
| Mashapaug Land Co | | 2 | | | |
| Mashek Lumber Co | | 2 | | | |
| Mason and Hamlin Co | | 7 | | | |
| Mason and Oceana Railroad | | 21 | | | |
| Mason City and Fort Dodge Railroad | | 23 | | | |
| Mason City Gas and Electric Light Co | | 4 | | | |
| Mason County Democrat | | 2 | | | |
| Mason Engraving Co | | 11 | | | |
| Mason Manufacturing Co | | 3 | | | |
| Mason Opera House | | 3 | | | |
| Mason Regulator Co | | 3 | | | |
| Mason Valley Mines Co | | 7 | | | |
| Masonic Fraternity Temple Association | | 6 | | | |
| Masonic Hall Association | | 5 | | | |
| Masonic Temple Safety Deposit Co | | 3 | | | |
| Masontown Distilling Co | | 3 | | | |
| Masontown Gas Co | | 3 | | | |
| Mass Bonding and Insurance Co | | 4 | | | |
| Mass Consolidated Mining Co | | 11 | | | |
| Mass Mutual Life Insurance Co | | 7 | | | |
| Massachusetts Agricultural Experiment Station | | 7 | | | |
| Massachusetts Baptist Convention | | | | | |
| Massachusetts Breweries Co | | 10 | | | |
| Massachusetts Chemical Co | | 4 | | | |
| Massachusetts Co | | 3 | | | |
| Massachusetts Dental Society | | 90 | | | |
| Massachusetts Gynecological Society | | 19 | | | |
| Massachusetts Highway Commission | | 20 | | | |
| Massachusetts Library Club | | 16 | | | |
| Massachusetts Medical Journal | | 1 | | | |
| Massachusetts Mohair Plush Co | | 5 | | | |
| Massachusetts Mutual Life Insurance Co | | 39 | | | |
| Massachusetts Public Service Commission | | 5 | | | |
| Massachusetts State Board of Trade | | 4 | | | |
| Massachusetts State Department of Health | | 11 | | | |
| Massachusetts Steel Casting Co | | 3 | | | |
| Massachusetts Title Insurance Co | | 8 | | | |
| Massachusetts Trust Co | | 2 | | | |
| Massachusetts Wharf Coal Co | | 5 | | | |
| Massillon and Cleveland Railroad | | 2 | | | |
| Massillon and Little Beaver Railroad | | 2 | | | |
| Massillon Gas Light Co | | 3 | | | |
| Massillon Iron and Steel Co | | 3 | | | |
| Massillon Telephone Co | | 10 | | | |
| Masten and Co | | 2 | | | |
| Masten and Wells Fireworks Manufacturing Co | | 3 | | | |
| Master Builders Exchange | | 22 | | | |
| Master Carburator Co | | 8 | | | |
| Master Mind Pub Co | | 3 | | | |
| Masterpiece Film Manufacturing Co | | 4 | | | |
| Matawan and Keyport Gas Light Co | | 2 | | | |
| Mather Stock Car Co | | 5 | | | |
| Mathers Humane Stock Transportation Co | | 5 | | | |
| Matheson Alkali Works | | 4 | | | |
| Matheson Lead Co | | 5 | | | |
| Matheson Motor Car Co | | 14 | | | |
| Mathews Candy Co | | 14 | | | |
| Mathews Down Draft Boiler Co | | 5 | | | |
| Mathews Paint Co | | 14 | | | |
| Mathie Brewing Co | | 10 | | | |
| Mattapan Deposit and Trust Co | | 19 | | | |
| Matthews Brothers Co | | 14 | | | |
| Matthews Gas Machine Co | | 3 | | | |
| Mattoon Clear Water Co | | 3 | | | |
| Mattoon Independent Weekly | | 1 | | | |
| Mattoon Journal-Gazette And Commercial-Star | | 1 | | | |
| Mattoon Railway | | 4 | | | |
| Matzene Co | | 2 | | | |
| Mauayunk Gas Light Co | | 4 | | | |
| Mauch Chunk Gas Co | | 6 | | | |
| Mauch Chunk Heat, Power and Electric Light Co | | 14 | | | |
| Maumee Branch Railroad | | 7 | | | |
| Maumee Rolling Mill Co | | 4 | | | |
| Maurer and Co | | 2 | | | |
| Maury National Bank of Columbia | | 1 | | | |
| Mauser Manufacturing Co | | 6 | | | |
| Max Hahn Packaging Co | | 12 | | | |
| Max Roth Cigar Co | | 3 | | | |
| Maximus Metals Co | | 4 | | | |
| Maxwell Leather Co | | 3 | | | |
| Maxwell Motor Co | | 14 | | | |
| Maxwell-Briscoe Motor Co | | 7 | | | |
| Maxwell-Briscoe-Handley Co | | 5 | | | |
| May Day Mining and Milling Co | | 6 | | | |
| May Department Stores Co | | 11 | | | |
| May Lumber Co | | 3 | | | |
| Mayer Publishing and Printing Co | | 2 | | | |
| Mayfield Woolen Mills Clothing Co | | 5 | | | |
| Mayflower Gold Mining Co | | 5 | | | |
| Maynard Land Co | | 4 | | | |
| Maynard, Merrill and Co | | 4 | | | |
| Mayo Beef Co | | 4 | | | |
| Mays Landing Water Power Co | | 6 | | | |
| Maysville Gas Co | | 5 | | | |
| Maywood Co | | 6 | | | |
| Maywood Foundry and Machine Co | | 2 | | | |
| Maywood State Bank of Chicago | | 2 | | | |
| Maywood Suburban Advertiser | | 1 | | | |
| McAlester Coal Co | | 3 | | | |
| McAlester Fuel Co | | 5 | | | |
| McArthur Brothers Co | | 4 | | | |
| McAuley Automatic Trap Co | | 3 | | | |
| McBride Printing Co | | 5 | | | |
| McCabe and MacCann Co | | 2 | | | |
| McCabe Hanger Manufacturing Co | | 1 | | | |
| McCall Co | | 1 | | | |
| McCall Publishing Co | | 1 | | | |
| McCammon State Bank | | 1 | | | |
| McCarthy Co | | 4 | | | |
| Mccaskill Co | | 4 | | | |
| McCauley Mountain and Black Creek Railroad | | 13 | | | |
| Mcclave-Brooks Co | | 3 | | | |
| McClellan Manufacturing Co | | 6 | | | |
| McClintock and Irvine Co | | 3 | | | |
| McCloud River Railroad | | 9 | | | |
| McClures Magazine | | 5 | | | |
| Mcconnelsville-Malta Electric Co | | 8 | | | |
| McConway and Torley Co | | 6 | | | |
| McCord and Co | | 4 | | | |
| McCormick Brewing Co | | 4 | | | |
| McCormick Harvesting Machine Co | | 1 | 1 | | |
| McCoy Directory Co | | | | | |
| McCrady Brothers Co | | 7 | | | |
| McCreery and Co | | 4 | | | |
| Mccrum-Howell Co | | 6 | | | |
| McCuistion Co | | 10 | | | |
| McCullough Iron Co | | 5 | | | |
| McCurdy-Miller Co | | 5 | | | |
| McDevitt and Doyle Co | | 4 | | | |
| Mcdonald-Ely Copper Co | | 8 | | | |
| McDonough and Co | | 3 | | | |
| Mcdonough Democrat | | 1 | | | |
| McDougle-Craig Co | | 20 | | | |
| McDowell, Stocker and Co | | 3 | | | |
| McFadden and Craig Co | | 5 | | | |
| McFarland Drug Co | | 4 | | | |
| McFarland, Shumway and Armstrong Co | | 3 | | | |
| McGarigle Catering Co | | 2 | | | |
| McGarry Realty Co | | 3 | | | |
| McGinness Co | | 3 | | | |
| Mcgraw Coat, Co | | 3 | | | |
| McGraw Hill Publishing Co | | 2 | | | |
| McGraw Publishing Co | | 13 | | | |
| McGuire Cabinet Co | | 7 | | | |
| McGuire Manufacturing Co | | 5 | | | |
| McIlroy Jennings Cornice Works | | 3 | | | |
| McIlvaine Adjustment Co | | 2 | | | |
| McIntosh Battery and Optical Co | | 2 | | | |
| McJunkin-Straight Dairy Co | | 4 | | | |
| McKain Manufacturing Co | | 4 | | | |
| McKees Rocks Trust Co | | 9 | | | |
| McKeesport Evening Times | | 1 | | | |
| McKeesport Gas Co | | 3 | | | |
| McKeesport Terminal Railroad | | 10 | | | |
| McKeesport Tin Plate Co | | 11 | | | |
| McKeesport Title and Trust Co | | 15 | | | |
| McKelvey Concrete Machinery Co | | 3 | | | |
| McKelvy-Hine Co | | 3 | | | |
| McKenzie Furnace Co | | 3 | | | |
| McKinley Music Co | | 3 | | | |
| Mckinley-Darragh-Savage Mines of Cobalt | | 8 | | | |
| McKinney Manufacturing Co | | 4 | | | |
| McLain Fire Brick Co | | 4 | | | |
| McLellan and Brigham Co | | 4 | | | |
| McLeod Co | | 2 | | | |
| McLeod-Gordon-Wilson Co | | 3 | | | |
| McLeroth and Co | | 2 | | | |
| McMannis and Callahan Live Stock Co | | 2 | | | |
| McMullen Lumber Co | | 5 | | | |
| McMullin Motive Power and Construction Co | | 2 | | | |
| McNaughton Co | | 3 | | | |
| McNeil and Higgins Co | | 8 | | | |
| Mead Cycle Co | | 3 | | | |
| Mead-Smith Manufacturing Co | | 2 | | | |
| Meadow Lands Coal Co | | 14 | | | |
| Meadow Mining Co | | 2 | | | |
| Meadow Mountain Mining Co | | 7 | | | |
| Meadow River Coal and Land Co | | 11 | | | |
| Meadow River Lumber Co | | 9 | | | |
| Meadville Gas and Water Co | | 11 | | | |
| Meadville Malleable Iron Co | | 10 | | | |
| Meadville Telephone Co | | 7 | | | |
| Mechanic Falls Electric Light Co | | 6 | | | |
| Mechanical Accountant Co | | 5 | | | |
| Mechanical Educator Co | | 3 | | | |
| Mechanical Equipment Co | | 3 | | | |
| Mechanical Rubber Co | | 5 | | | |
| Mechanics and Farmers Savings Bank of Albany | | 1 | | | |
| Mechanics and Traders Insurance Co of New Orleans | | 12 | | | |
| Mechanics Bank of Groton | | 1 | | | |
| Mechanics Bank of Washington | | 4 | | | |
| Mechanics Insurance Co of Philadelphia | | 18 | | | |
| Mechanics Iron Foundry Co | | 3 | | | |
| Mechanics Mutual Fire Insurance Co | | 7 | | | |
| Mechanics National Bank of Concord | | 2 | | | |
| Mechanics National Bank of Philadelphia | | 5 | | | |
| Mechanics National Bank of Pittsburgh | | 2 | | | |
| Mechanics National Bank of Reading | | 1 | | | |
| Mechanics National Bank of Trenton | | 2 | | | |
| Mechanics National Bank of Worcester | | 12 | | | |
| Mechanics Savings Bank of Holyoke | | 1 | | | |
| Mechanics Savings Bank of Lowell | | 2 | | | |
| Mechanics Savings Bank of Manchester | | 1 | | | |
| Mechanics Savings Bank of Reading | | 3 | | | |
| Mechanics Savings Bank of Rochester | | 2 | | | |
| Mechanics Savings Bank of Winsted | | 1 | | | |
| Mechanics Savings Bank of Woonsocket | | 12 | | | |
| Mechanics Trust and Savings Bank of Paducah | | 1 | | | |
| Mechanics Trust Co | | 23 | | | |
| Mechanics-American National Bank of St Louis | | 25 | | | |
| Mechanicsburg Gas and Water Co | | 7 | | | |
| Mechanicsburg Gas Light Co | | 8 | | | |
| Mecklenburg Barber Shop | | 4 | | | |
| Mecklenburg Cafe | | 10 | | | |
| Mecklenburg Hotel | | 34 | | | |
| Mecklenburg Iron Works | | 23 | | | |
| Mecklenburg Lumber Co | | 3 | | | |
| Mecklenburg M and G Co | | 12 | | | |
| Mecklenburg Manufacturing Co | | 5 | | | |
| Mecklenburg Mills | | 67 | | | |
| Mecosta Railroad | | 14 | | | |
| Medford Savings Bank | | 1 | | | |
| Media Gas Light Co | | 3 | | | |
| Medical Advance | | 1 | | | |
| Medical Age | | 2 | | | |
| Medical and Historical Journal | | 1 | | | |
| Medical and Surgical Record | | 2 | | | |
| Medical and Surgical Reporter | | 2 | | | |
| Medical Brief | | 2 | | | |
| Medical Bulletin | | 3 | | | |
| Medical Chips | | 2 | | | |
| Medical Chronicle | | 1 | | | |
| Medical Classics | | 1 | | | |
| Medical Counselor | | 1 | | | |
| Medical Current | | 2 | | | |
| Medical Era | | 2 | | | |
| Medical Examiner | | 2 | | | |
| Medical Herald | | 2 | | | |
| Medical Index | | 1 | | | |
| Medical Institute | | 1 | | | |
| Medical Investigator | | 1 | | | |
| Medical Journal and Library Association | | 4 | | | |
| Medical Mirror | | 1 | | | |
| Medical Missionary Record | | 1 | | | |
| Medical Record | | 1 | | | |
| Medical Standard | | 1 | | | |
| Medical Student | | 2 | | | |
| Medical Summary | | 1 | | | |
| Medical Times | | 5 | | | |
| Medical Visitor | | 1 | | | |
| Medical World | | 1 | | | |
| Medicated Cream Soap Co | | 3 | | | |
| Medicinal Zeitung | | 1 | | | |
| Medicine Bows Mines Co | | 3 | | | |
| Medico-Legal Journal | | 1 | | | |
| Medina and Canandaigua Railroad | | 7 | | | |
| Medina County Farmers Telephone Co | | 3 | | | |
| Medina Gas Co | | 3 | | | |
| Medix Run Railroad | | 4 | | | |
| Meek-Barnes Bakery | | 4 | | | |
| Meerschaum Co of America | | 7 | | | |
| Meese and Gottfried Co | | 8 | | | |
| Meherrin Valley Bank of Woodland | | 1 | | | |
| Meiklejohn Co | | 2 | | | |
| Meine Williams and Co | | 2 | | | |
| Melbourne Argus | | 1 | | | |
| Mellen Water and Light Co | | 6 | | | |
| Mellins Food Co of North America | | 4 | | | |
| Mellish and Byfield Co | | 3 | | | |
| Melrose National Bank | | 3 | | | |
| Melrose Parker | | 2 | | | |
| Melrose Savings Bank | | 2 | | | |
| Meltons Bank of Gassaway | | 1 | | | |
| Melville and Krotz Springs Land Co | | 6 | | | |
| Melville Clark Piano Co | | 6 | | | |
| Melvin Motor | | 1 | | | |
| Memphis and Paducah Railroad | | 2 | | | |
| Memphis Artesian Water Department | | 5 | | | |
| Memphis Commercial Appeal | | 1 | | | |
| Memphis Gas Light Co | | 3 | | | |
| Memphis Journal of the Medical Sciences | | 2 | | | |
| Memphis Medical Monthly | | 2 | | | |
| Memphis State University Press | | | | | |
| Memphis Street Railway | | 14 | | | |
| Memphis Telephone Co | | 9 | | | |
| Memphis, Birmingham and Atlantic Railroad | | 4 | | | |
| Memphis, Clarksville and Louisville Railroad | | 5 | | | |
| Memphis, Selma and Brunswick Railroad | | 3 | | | |
| Mendenhall Banking Co | | 1 | | | |
| Mendon Dispatch-Times | | 3 | | | |
| Mendota Gas Co | | 4 | | | |
| Menominee and Escanaba Railroad | | 4 | | | |
| Menominee and Marinette Light and Traction Co | | 11 | | | |
| Menominee and Marinette Light and Traction Railroad | | 13 | | | |
| Menominee and Northern Railroad | | 5 | | | |
| Menominee and Sault Ste Marie Railroad | | 5 | | | |
| Menominee Branch Railroad | | 5 | | | |
| Menominee Electric Light Railway and Power | | 9 | | | |
| Menominee Electric Railway and Power | | 5 | | | |
| Menominee Range Power and Development Co | | 6 | | | |
| Menominee Range Street Railway | | 3 | | | |
| Menominee River Lumber Co | | 2 | | | |
| Menominee Street Railway | | 8 | | | |
| Mephistophelean | | 2 | | | |
| Meramec Co | | 4 | | | |
| Mercantile Audit Co | | 3 | | | |
| Mercantile Bank of Baltimore | | 13 | | | |
| Mercantile Bank of the Americas, Inc | | 1 | | | |
| Mercantile Co | | 2 | | | |
| Mercantile Land Co | | 3 | | | |
| Mercantile Mutual Fire Insurance Co | | 6 | | | |
| Mercantile National Bank of Salem | | 1 | | | |
| Mercantile National Bank of St Louis | | 1 | | | |
| Mercantile National Bank of the City of New York | | 1 | | | |
| Mercantile Realty Co | | 6 | | | |
| Mercantile Safe Deposit Co of New Haven | | 11 | | | |
| Mercantile Savings Bank of Baltimore | | 1 | | | |
| Mercantile Tailoring Co | | 3 | | | |
| Mercantile Wharf Co | | 5 | | | |
| Merced Electric Light and Gas Co | | 3 | | | |
| Merced Falls Gas and Electric Co | | 5 | | | |
| Merced Security Savings Bank | | 1 | | | |
| Mercer Pottery Co | | 3 | | | |
| Mercer Rubber Co | | 3 | | | |
| Mercer Valley Railroad | | 5 | | | |
| Mercereau Bridge and Construction Co | | 4 | | 🚂 | |
| Mercerian | | 3 | | | |
| Merchant and Co | | 9 | | | |
| Merchant and Evans Co | | 8 | | | |
| Merchant Shipbuilding Co | | 7 | | | |
| Merchants and Clerks Savings Bank of Toledo | | 3 | | | |
| Merchants and Farmers Bank of Apex | | 3 | | | |
| Merchants and Farmers Bank of Bakersville | | 4 | | | |
| Merchants and Farmers Bank of Branford | | 1 | | | |
| Merchants and Farmers Bank of Brookhaven | | 1 | | | |
| Merchants and Farmers Bank of Cheraw | | 1 | | | |
| Merchants and Farmers Bank of Columbia | | 1 | | | |
| Merchants and Farmers Bank of Eupora | | 1 | | | |
| Merchants and Farmers Bank of Eutaw | | 1 | | | |
| Merchants and Farmers Bank of Kosciusko | | 1 | | | |
| Merchants and Farmers Bank of Mooresville | | 1 | | | |
| Merchants and Farmers Bank of Roanoke | | 1 | | | |
| Merchants and Farmers Bank of Shreveport | | 1 | | | |
| Merchants and Farmers Bank of Sterling | | 1 | | | |
| Merchants and Farmers National Bank | | 1 | | | |
| Merchants and Farmers National Bank of Charlotte | | 6 | | | |
| Merchants and Farmers National Bank of Greensburg | | 9 | | | |
| Merchants and Farmers Telephone Co | | 3 | | | |
| Merchants and Manufacturers Bank of Andrews | | 3 | | | |
| Merchants and Manufacturers Exchange of New York | | 7 | | | |
| Merchants and Manufacturers National Bank of Newark | | 1 | | | |
| Merchants and Manufacturers National Bank of Pittsburgh | | 2 | | | |
| Merchants and Mechanics Bank of Brackenridge | | 7 | | | |
| Merchants and Mechanics Bank of Jefferson City | | 1 | | | |
| Merchants and Mechanics Bank of Leechburg | | 1 | | | |
| Merchants and Mechanics Bank of Tarentum | | 2 | | | |
| Merchants and Miners Bank of Calumet | | 2 | | | |
| Merchants and Miners State Bank of Duluth | | 1 | | | |
| Merchants and Planters Bank of Bunkie | | 1 | | | |
| Merchants and Planters Bank of Norfolk | | 1 | | | |
| Merchants and Planters Bank of Texarkana | | 1 | | | |
| Merchants and Savings Bank of Janesville | | 1 | | | |
| Merchants Bank and Trust Co of Jackson | | 1 | | | |
| Merchants Bank of Augusta | | 1 | | | |
| Merchants Bank of Kansas City | | 1 | | | |
| Merchants Bank of McRae | | 1 | | | |
| Merchants Bank of Orlando | | 1 | | | |
| Merchants Bank of Passaic | | 1 | | | |
| Merchants Bank of Pittsburgh | | 2 | | | |
| Merchants Bank of Vandervoort | | 1 | | | |
| Merchants Bank of Washington | | 3 | | | |
| Merchants Building Co | | 4 | | | |
| Merchants Cold Storage and Warehouse Co | | 6 | | | |
| Merchants Cooperative Bank of Boston | | 19 | | | |
| Merchants Dispatch Transportation Co | | 4 | | | |
| Merchants Electric Light Association | | 9 | | | |
| Merchants Exchange Bank of Downing | | 2 | | | |
| Merchants Fund | | 2 | | | |
| Merchants Heat and Light Co | | 7 | | | |
| Merchants Ice and Cold storage Co | | 11 | | | |
| Merchants Lacede National Bank of St Louis | | 3 | | | |
| Merchants Legal Stamp Co | | 8 | | | |
| Merchants Loan and Trust Safe Deposit Co | | 3 | | | |
| Merchants Mutual Telephone Co | | 5 | | | |
| Merchants National Bank | | 41 | | | |
| Merchants National Bank at Cincinnati | | 1 | | | |
| Merchants National Bank of Baltimore | | 1 | | | |
| Merchants National Bank of Bangor | | 1 | | | |
| Merchants National Bank of Billings | | 1 | | | |
| Merchants National Bank of Burlington | | 2 | | | |
| Merchants National Bank of Butler | | 7 | | | |
| Merchants National Bank of Chicago | | 2 | | | |
| Merchants National Bank of Crookston | | 1 | | | |
| Merchants National Bank of Dayton | | 1 | | | |
| Merchants National Bank of Indianapolis | | 3 | | | |
| Merchants National Bank of Kittanning | | 6 | | | |
| Merchants National Bank of Meadville | | 1 | | | |
| Merchants National Bank of New York | | 16 | | | |
| Merchants National Bank of Peoria | | 1 | | | |
| Merchants National Bank of Plattsburgh | | 1 | | | |
| Merchants National Bank of Portland | | 1 | | | |
| Merchants National Bank of Pottsville | | 1 | | | |
| Merchants National Bank of Providence | | 12 | | | |
| Merchants National Bank of Quakertown | | 1 | | | |
| Merchants National Bank of Salem | | 2 | | | |
| Merchants National Bank of Santa Monica | | 1 | | | |
| Merchants National Bank of Sioux City | | 1 | | | |
| Merchants National Bank of St Johnsbury | | 1 | | | |
| Merchants National Bank of St Paul | | 31 | | | |
| Merchants National Bank of Syracuse | | 1 | | | |
| Merchants National Bank of Wadena | | 1 | | | |
| Merchants National Bank of Watertown | | 1 | | | |
| Merchants National Bank of Wimbledon | | 1 | | | |
| Merchants National Bank of Worcester | | 1 | | | |
| Merchants Natonal Bank of Philadelphia | | 1 | | | |
| Merchants Power Co | | 4 | | | |
| Merchants Realty and Investment Co | | 9 | | | |
| Merchants Refrigerating Co | | 11 | | | |
| Merchants Refrigerating Co of New Jersey | | 8 | | | |
| Merchants Safe Deposit Co | | 4 | | | |
| Merchants Savings and Trust Co | | 7 | | | |
| Merchants State Bank of Centralia | | 1 | | | |
| Merchants State Bank of Derby | | 1 | | | |
| Merchants State Bank of Little Falls | | 1 | | | |
| Merchants Supply Co | | 7 | | | |
| Merchants Transfer and Storage Co | | 11 | | | |
| Merchants Warehouse Co of Boston | | 6 | | | |
| Merchants Warehouse Co of Philadelphia | | 8 | | | |
| Mercury Independent | | 2 | | | |
| Meredosia Budget | | 1 | | | |
| Meriden Electric Light Co | | 7 | | | |
| Meriden Gas Light Co | | 10 | | | |
| Meriden Record | | 1 | | | |
| Meridian Gas Co | | 3 | | | |
| Meridian Home Telephone Co | | 9 | | | |
| Meridian National Bank of Indianapolis | | 3 | | | |
| Merle and Heaney Manufacturing Co | | 5 | | | |
| Mermaid Genuine Pain Expeller Co | | 3 | | | |
| Merrifield Building Trust | | 3 | | | |
| Merrifleld, Ziegler and Co | | 6 | | | |
| Merrill Timber Co | | 3 | | | |
| Merrill, Dexter and Co | | 3 | | | |
| Merrimac Chemical Co | | 10 | | | |
| Merrimac Mutual Fire Insurance Co | | 1 | | | |
| Merrimac Savings Bank | | 1 | | | |
| Merriman Solidified Oil Co | | 3 | | | |
| Merritt and Chapman Derrick and Wrecking Co | | 4 | | | |
| Mesaba Steamship Co | | 6 | | | |
| Messa Lonskee Electric Co | | 7 | | | |
| Messenger Publishing Co | | 3 | | | |
| Messinger Hardwood Lumber Co | | 4 | | | |
| Metacomet National Bank of Fall River | | 1 | | | |
| Metal Novelty Works Co | | 3 | | | |
| Metal Products Co | | 5 | | | |
| Metallic Folding Bed Co | | 4 | | | |
| Metallic Shell and Tube Co | | 3 | | | |
| Metallurgical Co of America | | 7 | | | |
| Metcalf Stationery Co | | 3 | | | |
| Methodist Episcopal Church South | | | | | |
| Methodist Recorder | | 6 | | | |
| Methodist Review | | 3 | | | |
| Methow Canal Co | | 3 | | | |
| Methuen Gas Light Co | | 3 | | | |
| Metropolis Gazette | | 1 | | | |
| Metropolis News | | 1 | | | |
| Metropolis Republican-Herald | | 2 | | | |
| Metropolitan Advertising Co | | 3 | | | |
| Metropolitan Bank of New York | | 23 | | | |
| Metropolitan Bank of Seattle | | 2 | | | |
| Metropolitan Banks of Buffalo | | 17 | | | |
| Metropolitan Barber Shop | | 3 | | | |
| Metropolitan Coal Co | | 6 | | | |
| Metropolitan Contracting Co | | 12 | | | |
| Metropolitan Electric Co | | 10 | | | |
| Metropolitan Electric Railway | | 3 | | | |
| Metropolitan Electrical Supply Co | | 2 | | | |
| Metropolitan Elevated Railroad | | 7 | | | |
| Metropolitan Express Co | | 6 | | | |
| Metropolitan Gas Light Co | | 7 | | | |
| Metropolitan Light and Power Co | | 8 | | | |
| Metropolitan Manufacturing Co | | 3 | | | |
| Metropolitan National Bank of Chicago | | 2 | | | |
| Metropolitan National Bank of Pittsburgh | | 18 | | | |
| Metropolitan Park Commission | | 4 | | | |
| Metropolitan Safe Deposit Co | | 9 | | | |
| Metropolitan Savings Bank of New York | | 15 | | | |
| Metropolitan Shirt Co | | 3 | | | |
| Metropolitan Steamship Co | | 11 | | | |
| Metropolitan Supply Co | | 3 | | | |
| Metropolitan Telephone and Electric Co | | 2 | | | |
| Metropolitan Tobacco Co | | 9 | | | |
| Metropolitan Trust and Savings Bank of Chicago | | 4 | | | |
| Metropolitan Trust Co | | 44 | | | |
| Metropolitan Water and Sewerage Board | | 7 | | | |
| Metropolitan West Side Elevated Railroad | | 14 | | | |
| Metropolitan West Side Elevated Railroad of Chicago | | 15 | | | |
| Metropolitan Wharf and Storage Co | | 5 | | | |
| Metuchen Gas Light Co | | 5 | | | |
| Metz Bush Box Co | | 3 | | | |
| Mexia Light and Water Co | | 3 | | | |
| Mexican Coal and Coke Co | | 10 | | | |
| Mexican Electric Light Co | | 6 | | | |
| Mexican Gulf Oil Co | | 4 | | | |
| Mexican Hardwood Lumber Co | | 4 | | | |
| Mexican Investment Co | | 4 | | | |
| Mexican Lead Co | | 8 | 1 | | |
| Mexican Light and Power Co | | 12 | | | |
| Mexican Milling and Transportation Co | | 8 | | | |
| Mexican Mineral Railway | | 2 | 1 | | |
| Mexican Mutual Planters Co | | 7 | | | |
| Mexican National Construction Co | | 8 | | | |
| Mexican National Packing Co | | 11 | | | |
| Mexican Northern Power Co | | 8 | | | |
| Mexican Petroleum Co | | 17 | | | |
| Mexican Plantation Co | | 2 | | | |
| Mexican Product Co | | 3 | | | |
| Mexican Railway | | 20 | | | |
| Mexican Southern Railway | | 17 | | | |
| Mexican Telephone and Telegraph Co | | 11 | | | |
| Mexico Consolidated Mining and Smelting Co | | 15 | | | |
| Mexico Electric Co | | 3 | | | |
| Mexico, Cuernavaca and Pacific Railway | | 10 | | | |
| Meyberg Co | | 24 | | | |
| Meyer and Talbott Co | | 7 | | | |
| Meyercord Co | | 4 | | | |
| Miama Mining Co | | 2 | | | |
| Miami Copper Co | | 16 | | | |
| Miami Gas Co | | 6 | | | |
| Miami Herald | | 1 | | | |
| Miami Journal | | 2 | | | |
| Miami Student | | 10 | | | |
| Miami Valley Gas and Fuel Co | | 9 | | | |
| Miami Valley National Bank | | 1 | | | |
| Michigan Academy of Science | | 26 | | | |
| Michigan Air Line Extension Railroad | | 8 | | | |
| Michigan and Arizona Development Co | | 7 | | | |
| Michigan and Chicago Railroad | | 13 | | | |
| Michigan and Colorado Mining and Milling Co | | 7 | | | |
| Michigan and Indiana Railroad | | 5 | | | |
| Michigan and Indiana Traction Railroad | | 3 | | | |
| Michigan and Mackinaw Railroad | | 6 | | | |
| Michigan and Ohio Electric Railway | | 4 | | | |
| Michigan Central Iron Co | | 2 | | | |
| Michigan Central Traction Railroad | | 3 | | | |
| Michigan Christian Herald | | 5 | | | |
| Michigan Cider Co | | 3 | | | |
| Michigan City Gas Co | | 3 | | | |
| Michigan City, Lakeside and St Joe Electric Railway | | 7 | | | |
| Michigan Copper Mining Co | | 6 | | | |
| Michigan East and West Railroad | | 8 | | | |
| Michigan Electric Railway | | 3 | | | |
| Michigan Extension Railroad | | 7 | | | |
| Michigan Independent Telephone and Traffic Association | | 15 | | | |
| Michigan Inter-Urban Railroad | | 7 | | | |
| Michigan Lake Shore Railroad | | 34 | | | |
| Michigan Library Association | | 7 | | | |
| Michigan Light and Traction Railroad | | 5 | | | |
| Michigan Light Co | | 9 | | | |
| Michigan Midland Railroad | | 8 | | | |
| Michigan Mutual Life Insurance Co | | 26 | | | |
| Michigan Northern Railroad | | 25 | | | |
| Michigan Pacific Lumber Co | | 10 | | | |
| Michigan Power Co | | 4 | | | |
| Michigan Presbyterian | | 3 | | | |
| Michigan Puget Sound Lumber Co | | 11 | | | |
| Michigan Railway and Light | | 3 | | | |
| Michigan Smelting Co | | 7 | | | |
| Michigan Stove Co | | 11 | | | |
| Michigan Suburban Railroad | | 5 | | | |
| Michigan Sugar Co | | 6 | | | |
| Michigan Terminal Transfer Railroad | | 5 | | | |
| Michigan Traction Extension Railroad | | 5 | | | |
| Michigan United Railways | | 30 | | | |
| Michigan United Traction Railroad | | 20 | | | |
| Michigan West Shore Traction Railroad | | 7 | | | |
| Michigan, Ohio and Indiana Railroad | | 5 | | | |
| Michigan-Indiana Traction Railroad | | 4 | | | |
| Michoacan Power Co | | 8 | | | |
| Micmac Gold Mining Co | | 7 | | | |
| Microscope | | 1 | | | |
| Middietown Gas Light Co | | 4 | | | |
| Middle West Publishing Co | | | | | |
| Middleboro Gas and Electric Light Co | | 3 | | | |
| Middleboro Gazette | | 1 | | | |
| Middleburg and Schoharie Railway | | 13 | | | |
| Middlebury Free Press | | 1 | | | |
| Middlebury Register | | 4 | | | |
| Middleby Oven Manufacturing Co | | 2 | | | |
| Middlemarch Copper Co | | 5 | | | |
| Middlesborough Electric Light, Heat and Power Co | | 3 | | | |
| Middlesex Banking Co | | 10 | | | |
| Middlesex Co | | 7 | | | |
| Middlesex County National Bank | | 2 | | | |
| Middlesex Mutual Insurance Co | | 1 | | | |
| Middlesex Paper Co | | 3 | | | |
| Middlesex Safe Deposit and Trust Co | | 2 | | | |
| Middleton Paper Mills | | 4 | | | |
| Middletown and Swatara Consolidated Water Co | | 3 | | | |
| Middletown Electric Light Co | | 6 | | | |
| Middletown Gas and Electric Light Co | | 3 | | | |
| Middletown Gas Co | | 2 | | | |
| Middletown Gas Light Co | | 10 | | | |
| Middletown Ledger | | 2 | | | |
| Middletown Silver Co | | 2 | | | |
| Middletown State Bank | | 2 | | | |
| Middletown Tribune | | 2 | | | |
| Midland and Hubbard Railroad | | 5 | | | |
| Midland and Northern Railroad | | 8 | | | |
| Midland Elevator Co | | 2 | | | |
| Midland Grain Co | | 5 | | | |
| Midland Grocery Co | | 4 | | | |
| Midland Improvement Co | | 2 | | | |
| Midland Linseed Co | | 6 | | | |
| Midland Machine Co | | 2 | | | |
| Midland Railroad of New Jersey | | 5 | | | |
| Midland Railway | | 4 | | | |
| Midland Railway of Canada | | 8 | | | |
| Midland Railway of England | | 5 | | | |
| Midland Savings and Trust Co | | 3 | | | |
| Midland Steel Co | | 4 | | | |
| Midland Train Railroad | | 3 | | | |
| Midland Wall Paper Co | | 2 | | | |
| Midlothian Messenger | | 3 | | | |
| Midvale Steel Works | | 2 | | | |
| Midville, Swainsboro and Red Bluff Railroad | | 2 | | | |
| Midwest Telephone Co | | 3 | | | |
| Miehle Printing Press and Manufacturing Co | | 4 | | | |
| Mifflin and Centre County Railroad | | 16 | | | |
| Mikado Tea Co | | 3 | | | |
| Milburn Wagon Co | | 11 | | | |
| Milford and Uxbridge Street Railway | | 1 | | | |
| Milford Gas Co | | 4 | | | |
| Milford Gas Light Co | | 10 | | | |
| Milford Herald-News | | 1 | | | |
| Milford Rubber Co | | 3 | | | |
| Milford Savings Bank | | 4 | | | |
| Milford Water Co | | 6 | | | |
| Milford, Franklin and Providence Railroad | | 4 | | | |
| Military Occupation of Texas | | 88 | | | |
| Mill News Printing Co | | 3 | | | |
| Mill Owners Mutual Fire Insurance Co | | 5 | | | |
| Mill Valley and Mount Tamalpais Scenic Railway | | 5 | | | |
| Millbury National Bank | | 1 | | | |
| Millbury Savings Bank | | 1 | | | |
| Millbury Water Co | | 5 | | | |
| Milledgeville and Eatonton Railroad | | 8 | | | |
| Milledgeville Free Press | | 3 | | | |
| Millen and Southern Railroad | | 5 | | | |
| Millen and Southwestern Railroad | | 8 | | | |
| Miller and Coulson | | 2 | | | |
| Miller Brothers Dry Dock Co | | 3 | | | |
| Miller Car Lock and Seal Co | | 5 | | | |
| Miller County Exchange Bank of Olean | | 1 | | | |
| Miller County Railroad | | 4 | | | |
| Miller Creek Coal Co | | 2 | | | |
| Miller Ladder Co | | 3 | | | |
| Miller Metal Work Co | | 5 | | | |
| Miller Van Ness Co | | 14 | | | |
| Miller-Wagstaff Woodenware Co | | 10 | | | |
| Millers National Insurance Co | | 3 | | | |
| Millers River Gas Light Co | | 2 | | | |
| Millers Run Coal Co | | 2 | | | |
| Milliken Brothers | | 9 | | | |
| Milliken National Bank of Decatur | | 1 | | | |
| Millikin National Bank of Decatur | | 1 | | | |
| Mills and Gibb | | 10 | | | |
| Mills Iron Works | | 4 | | | |
| Mills Manufacturing Co | | 7 | | | |
| Mills Novelty Co | | 4 | | | |
| Millstadt Enterprise | | 2 | | | |
| Millville Gas Light Co | | 3 | | | |
| Millville Manufacturing Co | | 7 | | | |
| Milton Bradley Co | | 4 | | | |
| Milton E. Robinson Coal Co | | 3 | | | |
| Milton Electric Light and Power Co | | 6 | | | |
| Milton Gas Light Co | | 3 | | | |
| Milton Iron Co | | 3 | | | |
| Milton Manufacturing Co | | 5 | | | |
| Milton Savings Bank | | 4 | | | |
| Milwaukee | | 1 | | | |
| Milwaukee and Chicago Breweries Co | | 11 | | | |
| Milwaukee and Horicon Railroad | | 14 | | | |
| Milwaukee and La Crosse Railroad | | 3 | | | |
| Milwaukee and Prairie du Chien Railway | | 34 | | | |
| Milwaukee and Superior Railway | | 3 | | | |
| Milwaukee Bridge and Iron Co | | 1 | | 🚂 | |
| Milwaukee Building Co | | 9 | | | |
| Milwaukee Coke and Gas Co | | 10 | | | |
| Milwaukee Daily News | | 3 | | | |
| Milwaukee Free Press | | 3 | | | |
| Milwaukee Journal | | 2 | | | |
| Milwaukee Mechanics Insurance Co | | 20 | | | |
| Milwaukee Sentinel and Gazette | | 1 | | | |
| Milwaukee, Bay View and Chicago Railroad | | 3 | | | |
| Milwaukee, Menominee Falls and Western Railway | | 3 | | | |
| Mine and Smelter Supply Co | | 8 | | | |
| Mineola Light and Ice Co | | 4 | | | |
| Miner-Hillard Milling Co | | 6 | | | |
| Mineral City Bank of Mineral City | | 1 | | | |
| Mineral Hill Consolidated Copper Co | | 8 | | | |
| Mineral Hill Tunnel and Copper Mining Co | | 1 | | | |
| Mineral Point Electric Light Co | | 2 | | | |
| Mineral Point Railroad | | 20 | | | |
| Mineral Point Zine Co | | 2 | | | |
| Miners and Merchants Bank of Bisbee | | 1 | | | |
| Miners and Merchants Bank of Iditaroa | | 1 | | | |
| Miners Bank of Winchester | | 1 | | | |
| Miners National Bank of Blossburg | | 1 | | | |
| Miners National Bank of Eveleth | | 1 | | | |
| Miners Savings Bank and Trust Co | | 1 | | | |
| Miners Savings Bank of Butte | | 2 | | | |
| Miners Savings Bank of Pittston | | 1 | | | |
| Miners Supply Co | | 3 | | | |
| Minerva Banking Co | | 1 | | | |
| Minerva Iron Co | | 3 | | | |
| Mines Co of America | | 7 | | | |
| Mines Development Co of Nevada | | 5 | | | |
| Mines Finance Co | | 8 | | | |
| Mingo Valley Railroad | | 8 | | | |
| Mining and Exploration Co | | 7 | | | |
| Mining Magazine | | 1 | | | |
| Mining Reporter | | 1 | | | |
| Mining Review | | 1 | | | |
| Minneapolis and Pacific Railway | | 6 | | | |
| Minneapolis Bridge Co | | | | 🚂 | |
| Minneapolis Copper Co | | 12 | | | |
| Minneapolis Eastern Railway | | 8 | | | |
| Minneapolis Institute of Arts | | 4 | | | |
| Minneapolis Journal | | 5 | | | |
| Minneapolis Star | | 2 | | | |
| Minneapolis, Lyndale and Minnetonka Railroad | | 5 | | | |
| Minneapolis, Northfield and Southern Railway | | 4 | | | |
| Minneapolis, St Paul and Ashland Railroad | | 5 | | | |
| Minnehaha National Bank | | 2 | | | |
| Minnesota and International Railway | | 16 | | | |
| Minnesota and North Wisconsin Railroad | | 7 | | | |
| Minnesota and Ontario Power Co | | 9 | | | |
| Minnesota Central Telephone Co | | 4 | | | |
| Minnesota Library Association | | 5 | | | |
| Minnesota Loan and Trust Co | | 4 | | | |
| Minnesota Mutual Life Insurance Co | | 2 | | | |
| Minnesota Steel and Iron Co | | 5 | | | |
| Minnesota Transfer Railway | | 12 | | | |
| Minnesota, Dakota and Western Railway | | 6 | | | |
| Minnesota-Nevada Investment Co | | 8 | | | |
| Minnetonka Oil Co | | 5 | | | |
| Minonk News-Dispatch | | 3 | | | |
| Minquas Iron Works | | 4 | | | |
| Missall Lime Co | | 3 | | | |
| Mission Field | | 2 | | | |
| Mission Fixture Co | | 4 | | | |
| Mission Friends Publishing Co | | 5 | | | |
| Mission Motor Car Co | | 10 | | | |
| Mission Transportation and Refining Co | | 7 | | | |
| Mississippi Glass Co | | 9 | | | |
| Mississippi Lumber Co | | 4 | | | |
| Mississippi River and Bonne Terre Railway | | 18 | | | |
| Mississippi River and Northwestern Railroad | | 2 | | | |
| Mississippi River Power Distributing Co | | 11 | 1 | | |
| Mississippi River, Hamburg and Western Railway | | 8 | | | |
| Mississippi School Journal | | 1 | | | |
| Mississippi State Bank of Canton | | 1 | | | |
| Mississippi Valley Trust Co | | 4 | | | |
| Mississippi Wire Glass Co | | 8 | | | |
| Missizona Gold and Copper Mining Co | | 7 | | | |
| Missouri and Illinois Railroad | | 4 | | | |
| Missouri Asphalt and Oil Co | | 2 | | | |
| Missouri Central Branch Railway | | 4 | | | |
| Missouri Expedition | | 3 | | | |
| Missouri River Commission | | 11 | | | |
| Missouri River, Fort Scott and Gulf Railroad | | 19 | | | |
| Missouri School Journal | | 1 | | | |
| Missouri Southern Railroad | | 11 | | | |
| Missouri Tent and Awning Co | | 9 | | | |
| Missouri Trust Co | | 2 | | | |
| Missouri Valley and Blair Railway and Bridge Co | | 2 | | | |
| Missouri Valley Bridge Co | | 5 | | 🚂 | |
| Missouri Valley Medical Society | | 8 | | | |
| Missouri Valley Railroad | | 7 | | | |
| Missouri, Iowa and Nebraska Railroad | | 9 | | | |
| Missouri, Oklahoma and Gulf Railway | | 7 | | | |
| Mitchell Publishing Co | | | | | |
| Mitchell Spalding Coal Co | | 3 | | | |
| Mitchell Vance Co | | 10 | | | |
| Mitchell, Fletcher and Co | | 4 | | | |
| Mitchell, Tranter and Co | | 4 | | | |
| Mitchell-Leweis Motor Co | | 11 | | | |
| Mizpah Consolidated Copper and Gold Mining Co | | 6 | | | |
| Mizpah Copper Mining Co | | 5 | | | |
| Mme Taxis Toilet Co | | 2 | | | |
| Moberly Gas and Electric Co | | 3 | | | |
| Mobile and Bay Shore Railway | | 4 | | | |
| Mobile and Birmingham Railroad | | 10 | | | |
| Mobile and Girard Railroad | | 23 | | | |
| Mobile Exelesctric Co | | 5 | | | |
| Mobile Gas Light and Coke Co | | 3 | | | |
| Mobile Register | | 1 | | | |
| Mobile, Jackson and Kansas City Railroad | | 18 | | | |
| Mocoguabo Tobacco Co | | 2 | | | |
| Model Clothing Co | | 12 | | | |
| Model Dyeing and Printing Co | | 4 | | | |
| Model Heating Co | | 3 | | | |
| Model Portrait Co | | 1 | | | |
| Modern Language Association of America | | 9 | | | |
| Modern Language Association of Ohio | | 3 | | | |
| Modern Life | | 2 | | | |
| Modern Machinery Publishing Co | | 2 | | | |
| Modesto Gas Light, Coal and Coke Co | | 7 | | | |
| Modoc Expedition | | 7 | | | |
| Moffatt M. and Manufacturing Co | | 14 | | | |
| Moffett Livery Co | | 3 | | | |
| Mohawk Gas Co | | 6 | | | |
| Mohawk Manufacturing Co | | 4 | | | |
| Mohawk Mining Co | | 6 | | | |
| Mohawk Valley Bank | | 10 | | | |
| Mohican Co | | 5 | | | |
| Mokena News-Bulletin | | 1 | | | |
| Moline Daily Dispatch | | 4 | | | |
| Moline Herald | | 1 | | | |
| Moline Plow Co | | 5 | | | |
| Moline Trust and Savings Bank | | 2 | | | |
| Mollenhauer Sugar Refining Co | | 1 | 1 | | |
| Moloney-Bennet Belting Co | | 2 | | | |
| Momence Press-Reporter | | 1 | | | |
| Momence Progress | | 1 | | | |
| Momence Stone Co | | 4 | | | |
| Monaca National Bank | | 7 | | | |
| Monaghan Miles Co | | 10 | | | |
| Monarch Book Co | | 3 | | | |
| Monarch Box Co | | 6 | | | |
| Monarch Copper Gold Co | | 3 | | | |
| Monarch Electric and Wire Co | | 3 | | | |
| Monarch Mining and Smelting Co | | 10 | | | |
| Monarch Realty Co | | 4 | | | |
| Monarch Refrigerating Co | | 6 | | | |
| Monarch Tea Co | | 2 | | | |
| Monarch Telephone Manufacturing Co | | 10 | | | |
| Monash-Younker Co | | 2 | | | |
| Monaton Realty Investing Co | | 7 | | | |
| Moncrief Furnace and Manufacturing Co | | 4 | | | |
| Moncton and Buctouche Railway | | 7 | | | |
| Moncton Gas Light and Water Co | | 4 | | | |
| Moncton Tramways, Electricity and Gas Co | | 4 | | | |
| Mond Nickel Co | | 8 | | | |
| Mondon and Gustin Co | | 5 | | | |
| Monessen Coal and Coke Co | | 2 | | | |
| Monhagen Steel Works | | 4 | | | |
| Monier Manufacturing Co | | 4 | | | |
| Monitor Belmont Mining Co | | 3 | | | |
| Monitor Furnace | | 3 | | | |
| Monmouth Gas Co of Illinois | | 3 | | | |
| Monmouth Gas Co of Iowa | | 2 | | | |
| Monmouth Messenger | | 1 | | | |
| Monmouth Review Atlas | | 1 | | | |
| Monon Railroad | | 3 | | | |
| Monona State Bank | | 1 | | | |
| Monongahela City Trust Co | | 13 | | | |
| Monongahela House Co | | 2 | | | |
| Monongahela Incline Plane Co | | 2 | | | |
| Monongahela Inclined Plane Co | | 7 | | | |
| Monongahela National Bank of Brownsville | | 7 | | | |
| Monongahela National Bank of Pittsburgh | | 9 | | | |
| Monongahela Oil Co | | 2 | | | |
| Monongahela Railway | | 6 | | | |
| Monongahela River Railroad | | 4 | 1 | | |
| Monongahela Southern Railroad | | 4 | | | |
| Monongahela Underwriters Agency | | 3 | | | |
| Monorail Portable Railway | | 5 | | | |
| Monroe and Ann Arbor Railroad | | 7 | | | |
| Monroe and Ypsilanti Railroad | | 5 | | | |
| Monroe County National Bank of East Stroudsburg | | 1 | | | |
| Monroe County Savings Bank | | 3 | | | |
| Monroe county state Bank of Bloomington | | 1 | | | |
| Monroe Electric Co | | 4 | | | |
| Monroe Gas Light and Fuel Co | | 8 | | | |
| Monroe Gas Light Co | | 3 | | | |
| Monroe Safe Deposit Co | | 5 | | | |
| Monroe Traction Railroad | | 4 | | | |
| Monroe, Dundee and Lake Erie Railroad | | 7 | | | |
| Monsam Manufacturing Co | | 3 | | | |
| Monson Gas and Electric Co | | 3 | | | |
| Monson Railroad | | 9 | | | |
| Montague and Co | | 2 | | | |
| Montague Brothers Co | | 3 | | | |
| Montague, Pentwater and Manistee Railroad | | 5 | | | |
| Montana Baptist Record | | 1 | | | |
| Montana Central Railway | | 29 | | | |
| Montana Coal and Coke Co | | 4 | | | |
| Montana Consolidated Coal and Coke Co | | 3 | | | |
| Montana Consolidated Mining Co | | 6 | | | |
| Montana Copper and Gold Mining Co | | 2 | | | |
| Montana Independent Telephone Co | | 13 | | | |
| Montana Mining Co | | 5 | | | |
| Montana Power Co | | 6 | | | |
| Montana Power Transmission Co | | 7 | | | |
| Montana Railroad | | 8 | | | |
| Montana Scotch Bonnet Copper and Gold Mining Co | | 5 | | | |
| Montana Union Railway | | 6 | | | |
| Montana Water Co | | 3 | | | |
| Montana-Corbin Copper Co | | 7 | | | |
| Montana-Hecla Mining Co | | 4 | | | |
| Montauk Bank | | 18 | | | |
| Montauk Steamboat Co | | 7 | | | |
| Montclair Gas and Water Co | | 3 | | | |
| Montclair Trust Co | | 2 | | | |
| Monte Cristo Oil and Development Co | | 5 | | | |
| Monte Cristo Railway | | 7 | | | |
| Montello Granite Co | | 5 | | | |
| Monterey and Mexican Gulf Railroad | | 9 | | | |
| Monterey County Gas and Electric Co | | 5 | | | |
| Monterey Light and Power Co | | 6 | | | |
| Montevista Electric and Gas Light Co | | 8 | | | |
| Montezuma Electric Light, Power and Heating Co | | 5 | | | |
| Montezuma Lead Co | | 7 | | | |
| Montfort and Gatineau Colonization Railway | | 6 | | | |
| Montgomery Advertiser | | 2 | | | |
| Montgomery and Mullin Lumber Co | | 24 | | | |
| Montgomery Brothers | | 16 | | | |
| Montgomery county Bank of Montgomery City | | 1 | | | |
| Montgomery County Ice and Cold Storage Co | | 3 | | | |
| Montgomery County Telephone Co | | 5 | | | |
| Montgomery Journal | | 1 | | | |
| Montgomery Mail | | 1 | | | |
| Montgomery Mountain Mining Co | | 6 | | | |
| Montgomery News | | 6 | | | |
| Montgomery Palace Stock Car Co | | 2 | | | |
| Montgomery Shoshone Consolidated Mining Co | | 12 | | | |
| Monthly Weather Review | | 2 | | | |
| Monticello Bank and Trust Co | | 1 | | | |
| Monticello Bulletin | | 1 | | | |
| Montour Northern Railroad | | 8 | | | |
| Montour Railroad | | 31 | | | |
| Montpelier and Wells River Railroad | | 20 | | | |
| Montpelier Gas Light Co | | 3 | | | |
| Montreal and St Lambert Terminal Development Co | | 10 | | | |
| Montreal and Western Railroad | | 3 | | | |
| Montreal Cotton Co | | 12 | | | |
| Montreal Gas Co | | 3 | | | |
| Montreal Light, Heat and Power Co | | 13 | | | |
| Montreal Natural History Society | | 4 | | | |
| Montreal Steel Works | | 6 | | | |
| Montreal Water and Power Co | | 10 | | | |
| Montrose Worsted Co | | 5 | | | |
| Monument Gold Mining Co | | 4 | | | |
| Moody and Bermingham Co | | 4 | | | |
| Moody and Waters Co | | 3 | | | |
| Moon Horn Mines | | 5 | | | |
| Moon Manufacturing Co | | 2 | | | |
| Moore and White Co | | 3 | | | |
| Moore and Wyman Elevator and Machine Works | | 4 | | | |
| Moore Price Insurance Agency | | 2 | | | |
| Moore-DeGrazier Co | | 5 | | | |
| Moore-Maguire Roofing Co | | 5 | | | |
| Moore-Smith Co | | 5 | | | |
| Moose Horn Mines | | 5 | | | |
| Moque Copper Co | | 7 | | | |
| Moran and Hastings Manufacturing Co | | 3 | | | |
| Moran Co | | 9 | | | |
| Morava Construction Co | | 4 | | | |
| Moravia National Bank | | 1 | | | |
| Morden Frog and Crossing Works | | 4 | | | |
| Morehead State Bank of Lexington | | 1 | | | |
| Moreland Motor Truck Co | | 29 | | | |
| Morgan Cigar Co | | 3 | | | |
| Morgan Electric Machine Co | | 4 | | | |
| Morgan Engineering Co | | 8 | | | |
| Morgan Lodge and Co | | | | | |
| Morgan Oyster Co | | 6 | | | |
| Morgan Park Suburban Star | | 1 | | | |
| Morgan Spring Co | | 13 | | | |
| Morgan-Argentine Mining Co | | 5 | | | |
| Morgan-Gardner Electric Co | | 4 | | | |
| Morgans Louisiana and Texas Railroad and Steamship Co | | 21 | | | |
| Morgantown and Kingwood Railroad | | 4 | 1 | | |
| Morland Mining and Milling Co | | 1 | | | |
| Morning Herald | | 1 | | | |
| Moroney Hardware Co | | 14 | | | |
| Morris and Co | | 10 | | | |
| Morris and Snow Seed Co | | 4 | | | |
| Morris Bear and Bros | | 8 | | | |
| Morris County Railroad | | 3 | | | |
| Morris County Traction Co | | 9 | | | |
| Morris Daily Herald | | 3 | | | |
| Morris Gartner Printing Co | | 2 | | | |
| Morris Gas Co | | 2 | | | |
| Morris Paper Box Manufacturing Co | | 2 | | | |
| Morris Run Coal Mining Co | | 10 | | | |
| Morris Walsh Sons | | 3 | | | |
| Morrison and Fourmy Directory Co | | | | | |
| Morrison Gas and Electric Co | | 4 | | | |
| Morrison Hotel and Restaurant Co | | 2 | | | |
| Morrisonville Times | | 3 | | | |
| Morrissey, Fernie and Michel Railway | | 8 | | | |
| Morrisson, Plummer and Co | | 5 | | | |
| Morristown Gas Light Co | | 6 | | | |
| Morse Brothers Paper Box Co | | 3 | | | |
| Morse Dry Dock and Repair Co | | 6 | | | |
| Morse Publishing Co | | 3 | | | |
| Morse Twist Drill and Machine Co | | 7 | | | |
| Morse, Williams and Co | | 5 | | | |
| Mortgage Guarantee Co | | 9 | | | |
| Morton Co | | 2 | | | |
| Morton News | | 1 | | | |
| Morton-Gregson Co | | 3 | | | |
| Moscow Savings Bank | | 1 | | | |
| Moscow, Camden and San Augustine Railway | | 4 | | | |
| Moseley Sporting Goods Co | | 4 | | | |
| Moselle Iron Co | | 2 | | | |
| Moser Hygienic Dairy Co | | 3 | | | |
| Moses-Starr Co | | 4 | | | |
| Moshanuch Valley Railroad | | 1 | | | |
| Mosher Manufacturing Co | | 72 | | | |
| Mosher Water Tube Boiler Co | | 2 | | | |
| Mosler Safe Co | | 10 | | | |
| Moss Point and Pascagoula Railroad | | 4 | | | |
| Moss-Blakeley Plumbing Co | | 3 | | | |
| Mossberg Wrench Co | | 4 | | | |
| Mossler Co | | 2 | | | |
| Motch and Merryweather Machinery Co | | 3 | | | |
| Mothers Remedies Co | | 4 | | | |
| Motion Picture Patents Co | | 2 | | | |
| Motor Cab Co of New York | | 3 | | | |
| Motor Car Equipment Repairs Co | | 3 | | | |
| Motor Car Supply Co | | 8 | | | |
| Mottville and White Pigeon Railroad | | 11 | | | |
| Moulton Light Co | | 3 | | | |
| Moultrie County News | | 2 | | | |
| Mound City Water, Light, Power, Heat and Manufacturing Co | | 6 | | | |
| Mounds Independent | | 2 | | | |
| Mount Auburn Tribune | | 2 | | | |
| Mount Carmel Republican-Register | | 2 | | | |
| Mount Morris Index | | 2 | | | |
| Mount Prospect Herald | | 1 | | | |
| Mount Sterling Democrat-Message | | 4 | | | |
| Mount Vernon Furnace | | 2 | | | |
| Mountain Copper Co | | 6 | | | |
| Mountain Monarch Gold Mining Co | | 4 | | | |
| Movie Magazine | | 3 | | | |
| Moville State Bank | | 1 | | | |
| Moweaqua News | | 1 | | | |
| Moxie Nerve Food Co of New England | | 4 | | | |
| Moxley Livery Co | | 2 | | | |
| Mt Airy and Eastern Railway | | 4 | | | |
| Mt Carbon Railroad | | 17 | | | |
| Mt Carmel Gas and Electric Co | | 3 | | | |
| Mt Clemens and Lakeside Traction Railroad | | 6 | | | |
| Mt Clemens Street Railway | | 3 | | | |
| Mt Holly Bank | | 1 | | | |
| Mt Holly Gas Light Co | | 3 | | | |
| Mt Hood Railway and Power Co | | 7 | | | |
| Mt Hope Mineral Railroad | | 4 | | | |
| Mt Jewett, Kinzua and Riterville Railroad | | 7 | | | |
| Mt Joy Gas Light Co | | 4 | | | |
| Mt Laurel Furnace | | 2 | | | |
| Mt Mansfield Electric Railroad | | 1 | | | |
| Mt Morris Illuminating Co | | 3 | | | |
| Mt Olive Herald | | 2 | | | |
| Mt Penn Gravity Railroad | | 7 | | | |
| Mt Pleasant and Bradford Railroad | | 3 | | | |
| Mt Pleasant and Latrobe Railroad | | 7 | | | |
| Mt Pleasant Gas Co | | 4 | | | |
| Mt Pleasant Mutual Telephone Co | | 9 | | | |
| Mt Pulaski Times-News | | 1 | | | |
| Mt Royal Mining and Reduction Co | | 3 | | | |
| Mt Sicker and British Columbia Development Co | | 4 | | | |
| Mt Sterling Gas Light Co | | 3 | | | |
| Mt Vernon Gas Light and Coke Co | | 3 | | | |
| Mt Vernon Savings Bank | | 1 | | | |
| Mt Washington Cooperative Bank | | 15 | | | |
| Mt Washington Railway | | 9 | | | |
| Mt Whitney Power and Electric Co | | 5 | | | |
| Mt Zircon Spring Co | | 4 | | | |
| Mts Sicker and Brenton Mines | | 7 | | | |
| Mueller and Young Grain Co | | 5 | | | |
| Mueller Brothers Art and Manufacturing Co | | 3 | | | |
| Mulford Vitrified Paving Brick Co | | 4 | | | |
| Mullen and Bluett Clo Co | | 52 | | | |
| Mullen and Co | | 5 | | | |
| Mullen Brewing Co | | 3 | | | |
| Muller and Raas Co | | 7 | | | |
| Multiple Speed and Traction Co | | 5 | | | |
| Muncie Belt Railroad | | 4 | | | |
| Munger Laundry Co | | 12 | | | |
| Munger Law Book Co | | 3 | | | |
| Mungers Laundry Co | | 2 | | | |
| Munich Re-Insurance Co | | 6 | | | |
| Municipal Gas Light Co of Rochester | | 3 | | | |
| Municipal Motor Car Co | | 3 | | | |
| Municipal Signal Co | | 3 | | | |
| Municipal Utilities Co of Philadelphia | | 3 | | | |
| Municipal Water, Light and Power Co | | 5 | | | |
| Munising Railroad | | 31 | | | |
| Munising, Marquette and Southeastern Railroad | | 12 | | | |
| Munroe Felt and Paper Co | | 3 | | | |
| Munsell and Co | | | | | |
| Munsey Trust Co | | 5 | | | |
| Munseys Magazine | | 4 | | | |
| Munson Steamship Line | | 9 | | | |
| Munson-Whitaker Co | | 3 | | | |
| Murchison and Co | | 3 | | | |
| Murdoch, Kerr and Co | | 6 | | | |
| Murfreesboro Gas Light Co | | 3 | | | |
| Murphy Varnish Co | | 2 | | | |
| Murphysboro Independent | | 3 | | | |
| Murphysboro Water Works, Electric and Gas Light Co | | 4 | | | |
| Murray and Co | | 3 | | | |
| Murray and Nickell Manufacturing Co | | 3 | | | |
| Murray Baking Co | | 6 | | | |
| Murray Co | | 213 | | | |
| Murray Hill Iron Works | | 1 | | | |
| Murrayville Tribune | | 2 | | | |
| Muscatine Gas Electric Light and Power Co | | 4 | | | |
| Muscatine Light and Traction Co | | 4 | | | |
| Muscatine North and South Railroad | | 6 | | | |
| Muscatine Savings Bank of Chicago | | 1 | | | |
| Muscles Shoals Hydro-Electric Power Co | | 5 | | | |
| Muscogee and Georgia Railroad | | 17 | | | |
| Muscogee Manufacturing Co | | 8 | | | |
| Muscogee Railroad | | 16 | | | |
| Musconetcong Iron Works | | 1 | | | |
| Museum of History Science and Art | | 8 | | | |
| Music Magazine Publishing Co | | 2 | | | |
| Music News | | 3 | | | |
| Musical Courier | | 4 | | | |
| Musical Leader Publishing Co | | 2 | | | |
| Musical Monitor | | 2 | | | |
| Musical Record and Review | | 1 | | | |
| Muskegon and Big Rapids Railroad | | 11 | | | |
| Muskegon and Ferrysburg Railroad | | 13 | | | |
| Muskegon and Greenville Railroad | | 11 | | | |
| Muskegon Gas Light Co | | 3 | | | |
| Muskegon Lake Railroad | | 8 | | | |
| Muskegon Railway | | 3 | | | |
| Muskegon Railway and Navigation | | 7 | | | |
| Muskegon River and Cat Creek Railroad | | 5 | | | |
| Muskegon River and Rose Lake Railroad | | 11 | | | |
| Muskegon Terminal Railroad | | 7 | | | |
| Muskegon Traction and Lighting Co | | 10 | 1 | | |
| Muskegon, Ludington and Manistee Railroad | | 5 | | | |
| Muskogee Gas and Electric Co | | 8 | | | |
| Muskrat Lake and Clam River Railroad | | 9 | | | |
| Mutual Benefit Insurance Co | | 1 | | | |
| Mutual Chemical Co of America | | 10 | | | |
| Mutual Coin Machine Co | | 6 | | | |
| Mutual Dairy Association | | 10 | | | |
| Mutual District Messenger Co of Boston | | 3 | | | |
| Mutual Electric Light and Power Co | | 5 | | | |
| Mutual Fire Insurance Co | | 4 | | | |
| Mutual Fuel Gas Co of Chicago | | 3 | | | |
| Mutual Gas Co of Detroit | | 3 | | | |
| Mutual Gas Co of St Johns | | 2 | | | |
| Mutual Gas Light Co of Glendale | | 2 | | | |
| Mutual Gas Light Co of Islip | | 3 | | | |
| Mutual Gas Light Co of Southbridge | | 2 | | | |
| Mutual Life Insurance Co of Illinois | | 21 | | | |
| Mutual Realty Co | | 2 | | | |
| Mutual Savings Bank of San Francisco | | 1 | | | |
| Mutual Steamship Co | | 6 | | | |
| Mutual Telephone Co of Des Moines | | 7 | | | |
| Mutual Telephone Co of Erie | | 8 | | | |
| Mutual Trading Co of Chicago | | 4 | | | |
| Mutual Transit Co | | 3 | | | |
| Mutual Trust Co | | 6 | | | |
| Mycology Society | | 24 | | | |
| Myer Siegel and Co | | 7 | | | |
| Myers and Shinkle Co | | 6 | | | |
| Myers Hardware and Sporting Goods Co | | 7 | | | |
| Myers Land Co | | 7 | | | |
| Myers Printing Co | | 2 | | | |
| Myers, Darling and Hinton Co | | 9 | | | |
| Mystic Industrial Savings Bank | | 1 | | | |
Our Family Tree
