• Managed Care With Heart Co.
• Managed Funds Association Political Action Committee
• Management and Training Corporation Political Action Committee
• Manchin for West Virginia
• Mandela Barnes for Wisconsin
• Mandela Barnes Victory Fund
• Mannion for New York
• Mantech International Corporation Political Action Committee ( A.k.a 'Mantech PAC')
• Manufactured Housing Institute PAC
• Maple PAC
• Marathon Petroleum Corporation Employees Political Action Committee (Mpac)
• Marble Freedom Trust
• Marc for Us Inc.
• Marc Veasey Congressional Campaign Committee
• March on PAC
• Marco Rubio for President
• Marco Rubio for Senate
• Marden's
• Maremoto Action
• Margaret for Alaska
• Margaret Good for Congress
• Marie for Congress
• Marie Hurabiell for Congress
• Mario Diaz-Balart for Congress
• Mark Blaxill for Congress
• Mark Harris for Congress
• Mark Kelly for Senate
• Mark Kelly Victory Fund
• Mark Pocan for Congress
• Mark Teixeira for Congress
• Mark Warner Action Fund
• Mark Warner Victory Fund
• Markey Victory Fund
• Marlinga for Congress
• Marquis Management
• Marquis Master Sc, Inc. PAC (Marquis PAC)
• Marriott International, Inc. Political Action Committee
• Marsh & Mclennan Companies, Inc. PAC (Mmcpac)
• Marsha for Senate
• Marshall Goldman Sales and Leasing
• Martha PAC
• Martha Roby for Congress
• Martin Heinrich for Senate
• Mary Barzee Flores for Congress
• Mary Lawrence for Congress
• Mary Miller for Congress
• Mary Peltola for Alaska
• Maryland Association for Concerned Citizens Political Action Committee
• Maryland's Future
• Mason Tenders District Council of Greater New York & Li PAC
• Mass General Hospital
• Massachusetts Bankers PAC-Federal Fund
• Massachusetts Democratic State Committee
• Massachusetts First
• Massachusetts Institute of Technology
• Massachusetts Mutual Life Insurance Company Political Action Committee
• Massachusetts Republican Party
• Massachusetts Victory Committee
• Mast for Congress
• Mastercard International Inc. Employees' PAC
• MasterClass
• Masters, Mates and Pilots Political Contribution Fund
• Materion Corporation Political Action Committee
• Math for America
• Matrix Partners
• Matson, Inc. Federal Election Committee
• Matsui for Congress
• Matt Castelli for Congress
• Matt Davie for Congress
• Matt Lieberman for Senate
• Matt Longjohn for Congress
• Matt Maasdam for Congress
• Matt Rosendale for Montana
• Mattel
• Matthew Foldi for Congress
• Maura Sullivan for Congress
• Maverick PAC USA
• Max Miller for Congress
• Max Rose for Congress
• Maxar Technologies Inc. PAC (Maxarpac)
• Maximus Inc Political Action Committee (Maxpac)
• Maxwell Alejandro Frost for Congress
• Mayday PAC
• Mayer Brown
• Maynard Cooper & Gale Pc PAC
• Mayo Clinic
• Mcarthurglen Group
• Mcbride for Delaware Inc.
• McCain Institute
• McCann Worldgroup
• Mccarthy Victory Fund
• Mccaskill 2018 Victory
• Mccaskill for Missouri
• Mccaul for Congress, Inc
• McChrystal Group
• McClatchy
• Mcclellan for Congress
• Mcconnell for Majority Leader Committee
• Mcconnell Senate Committee
• Mccorkle for Colorado
• Mccormick for Congress
• Mccready for Congress
• Mcdermott Will & Emery LLP PAC
• McDonald's Corporation
• Mcdonalds Corporation Political Action Committee
• Mceachin for Congress
• Mcginn for New Mexico
• Mcgrath Off the Sidelines 2020
• Mcguire for Arizona
• Mcguire for Virginia
• Mcguirewoods Federal PAC
• Mcguirewoods LLP
• Mchenry for Congress
• Mckesson Corporation Employees Political Fund
• Mckinley for Congress
• McKinsey & Company
• Mckinsey & Company, Inc. United States Political Action Committee (Mckinsey PAC)
• Mcmorris Rodgers American Dream Project; The
• Mcmorrow for Michigan
• Mcmullin for Utah
• Mcsally for Congress
• Mcsally for Senate Inc
• Mdu Resources Group Good Government Fund
• Mechanical Contractors Association of America Political Action Committee (Mca-PAC)
• MediaNews Group
• Medical Device Innovation PAC, a Political Action Committee of Icu Medical, Inc.
• Medical Device Manufacturers Association PAC
• Medicare For All
• Medley Partners
• Mednax, Inc. Federal Political Action Committee
• Medstar Health
• Medtronic Inc. PAC
• Meeks Victory Fund
• MEIDASTOUCH
• Melanie for New Mexico
• Mellon Foundation
• MEMORIALHEALTHPAC
• Mendoza for Congress
• Menendez for Congress
• Menendez for Senate
• Menendez Victory Fund
• MercadoLibre
• Mercatus Center
• Mercer Family Foundation
• Merck & Co., Inc., Employees Political Action Committee (Merck PAC)
• Mercury
• Mercury Public Affairs
• Mercury Radio Arts
• Mercury Systems Inc. Employees' Political Action Committee (Mrcypac)
• Merit Medical Systems Inc Employee Good Governance PAC
• Meritage Homes Corporation PAC
• Meritech Capital
• Mermaid Factory
• Merrill Lynch
• META
• Meta Platforms
• Meta Platforms (Facebook)
• METLIFE
• Metlife Inc. Employees' Political Participation Fund A
• Metlife Inc. Employees' Political Participation Fund a - Federal Only
• Metropolitan Anesthesia Consultants Political Action Committee
• Metropolitan Council on Jewish Poverty
• Meuser for Congress
• MGM Resorts International
• Mgm Resorts International PAC
• Mi Familia Decide PAC
• MI Planned Parenthood Votes
• MI Poder
• Mi Poder PAC
• Michael Blake for Congress
• Michael Cassidy for Congress
• Michael Franken for Iowa, Inc
• Michael Waltz for Congress
• Michelle Vallejo for Congress
• Michigan Democratic State Central Committee
• Michigan Farm Bureau Political Action Committee
• Michigan House of Representatives
• Michigan Peoples Choice
• Michigan State University
• Michigan Sugar Company Growers Political Action Committee
• Michigan Values PAC
• MICHIGAN VALUES PAC
• Michigan's Future PAC
• Micron Technology, Inc. PAC
• Microsoft
• Microsoft Corporation Political Action Committee
• Mid-Atlantic Laborers Political Education Fund
• Mid-Michigan Tenant Resource Center
• Middle Class America PAC
• Midwest Region Laborers' Political League
• Midwest Values PAC
• Mijente PAC
• Mike Braun for Indiana
• Mike Collins for Senate
• Mike Crapo for Us Senate
• Mike Espy for Senate Campaign Committee
• Mike Espy Victory Fund
• Mike Flood for Congress
• Mike Gallagher for Wisconsin
• Mike Garcia for Congress
• Mike Johnston for Us Senate
• Mike Lee Victory Fund
• Mike Levin for Congress
• Mike Siegel for Congress
• Mike Tagert for Congress
• Mike Thompson for Congress
• Mikie Sherrill for Congress
• Milbank LLP
• Mile High Accountability Project
• Millennium Management
• Miller Johnson
• Miller-Meeks for Congress
• Milliken & Company PAC
• Millions of Michiganians
• Minepac, a Political Action Committee of the National Mining Association
• Minn-Dak Farmers Cooperative Sugar PAC (Mdspac)
• Minnesota Democratic-Farmer-Labor Party
• Minnesota Republican Party
• Minnesota Senate
• Minnesotans for Progress
• Mises PAC
• Mission First People Always PAC
• Mississippi Democratic Party
• Mississippi Farm Bureau Federation Furthering Agriculture for Rural Mississippians Fund Pa
• Mississippi Power Company Federal PAC
• Mississippi Republican Party
• Missouri Conservatives for Congress PAC
• Missouri Democratic State Committee (Federal)
• Missouri Farm Bureau Federation Federal PAC
• Missouri Republican State Committee-Federal
• Missouri Schmitt Victory Committee 2022
• Missourians for Kander
• Missy for Congress
• Misty for Congress
• Mithril Capital
• MITRE Corporation
• Mitten PAC
• Mj for Texas
• Mj Victory Fund
• Mmc Corp Political Action Committee
• Mnm PAC
• Mo Brooks for Congress
• Moderate Democrats PAC
• Moe Davis for Congress
• Mohn family
• Molina Healthcare, Inc. PAC
• Moment of Truth PAC
• Moms for Safe Neighborhoods, Inc.
• Momsrising Together
• Mondaire for Congress
• Monica Tranel for Montana
• Monica Vernon for Congress
• Monroe College
• Montana Conservation Voters Congressional Action Fund
• Montana Democratic Party
• Montana Freedom PAC
• Montana Hunters and Anglers Leadership Fund
• Montana Legislature
• Montana Outdoor Values Action Fund II
• Montana Red
• Montana Rural Voters (WORC)
• Montana Secretary of State
• Montana Talks
• Montanans for Bullock
• Montanans for Tester
• Montgomery Capital Inc
• Montlac Advisors
• Monument Advocacy
• Moody for Florida
• Moran for Kansas
• More Blue
• More Conservatives PAC (Mcpac)
• More Jobs, Less Government
• More Perfect Union PAC
• Morgan Harper for Ohio
• Morgan Mcgarvey for Congress
• Morgan Stanley
• Morgan Stanley Political Action Committee
• Morris Nichols Arsht Tunnell LLP
• Morrisey for Senate Inc
• Mortgage Bankers Association Political Action Committee (Morpac)
• Mortgage Guaranty Insurance Corporation Political Action Committee ('Mgic-PAC')
• Moser for Congress
• Mothership Strategies
• Motion Picture Association Inc Political Action Committee (Mpaamerica PAC)
• Motley Rice LLC
• Motor City PAC
• Motorola Solutions, Inc. Political Action Committee
• Moulton Leadership Fund
• Mount Sinai Health System
• Mountaineer PAC
• Movement Voter PAC
• MoveOn.org
• Moveon.org Political Action
• Moving America Forward
• Moving Montana Forward
• Mozilla Foundation
• Mr PAC
• Mr. Southern Missourian in the House PAC
• Mrvan for Congress