- Kelly PAC
- Ken Calvert for Congress Committee
- Ken Harbaugh for Congress
- Ken Harbaugh Ohio Victory Fund
- Kendra Horn for Congress
- Kennedy for Congress
- Kennedy for Massachusetts
- Kennedy Victory Fund
- Kennedy Victory Fund 2024
- Kenny Xu for Congress
- Kentucky 4th PAC
- Kentucky First Action
- Kentucky First PAC
- Kentucky State Democratic Central Executive Committee
- Kermit Jones for Congress
- Kernel
- Kernel Foods
- Keurig Dr Pepper Inc. PAC
- Kevin Bishop for Congress
- Kevin De Leon for Senate
- Kevin Kiley for Congress
- Kevin Lincoln for Congress
- Kevin Mccarthy for Congress
- Kevin Mullin for Congress
- Key Square Group
- Keycorp Advocates Fund
- Keycorp Advocates Fund-Federal
- Keystone Alliance Political Action Committee
- Keystone America PAC
- Keystone Renewal PAC
- Khazei for Congress
- Khosla Ventures
- Kickstarter
- Kidney Care Partners Political Action Committee
- KIDSPAC
- Kier for Congress
- Kiggans for Congress
- Killin for Colorado
- Kim Klacik for Congress
- Kimber Manufacturing
- Kind for Congress Committee
- King & Spalding
- King & Spalding Nonpartisan Committee for Good Government
- King Faisal Foundation
- Kings County Republican Central Committee (Federal)
- Kinney for Dc
- Kirby Corporation Political Action Committee
- Kirk for Senate
- Kirkland & Ellis LLP
- Kitchen Table Conversations
- KKR
- Klein Financial Corp
- Kleiner Perkins
- Klobuchar for Minnesota
- Klondike Cheese
- Knight Foundation
- Kobach for Senate
- Koch Industries, Inc.
- Koch Industries, Inc. Political Action Committee (Kochpac)
- Kohl for Congress
- Kohlberg Kravis Roberts & Co
- Kpmg Partners/Principals and Employees PAC
- Kps Capital Partners LP
- Kratos Defense & Security Solutions, Inc. Political Action Committee (Kratos PAC)
- Kristen Carlson for Congress Committee
- Kristen for Michigan
- KROGER
- KROLL
- Kurt Schrader for Congress
- Kushner Companies
- Kuskokwim River Inter-Tribal Fish Commission
- Kuster for Congress, Inc
- Kuwait Petroleum Corporation
- Kuwait Petroleum International
- Ky PAC
- L Brands, Inc./Limited Brands Political Action Committee (Limited Brands PAC)
- L PAC
- L-3 Harris
- L3 Harris Technologies
- L3 Technologies, Inc. PAC
- L3harris Technologies, Inc. PAC
- La Bamba PAC
- Laboratory Corporation of America Holdings Political Participation Committee
- Laborers' International Union of North America (LIUNA) PAC
- Laborers' International Union of North America Political Fund
- Lagardère
- Lahood for Congress
- Lance for Congress
- Land O'lakes, Inc., PAC
- Land of Opportunity PAC
- Landsman for Congress
- Las Vegas Review-Journal
- Las Vegas Sands
- Las Vegas Sands Corp. Political Action Committee (Sands PAC)
- Lasher for Congress
- Lasry for Wisconsin
- Last Best Place PAC
- Last Frontier PAC
- Lateefah for Congress
- Latham & Watkins LLP
- Latino Leaders for Equality Growth Opportunity Progressive Action & Change (Llego-PAC)
- Latino Victory Fund
- Latino Victory Project
- Latta for Congress
- LAUNCH
- Laurel Lee for Congress, Inc.
- Lauren Boebert for Congress
- Lauren Underwood for Congress
- Law Enforcement for a Safer America PAC
- Lawler for Congress, Inc.
- Lawyers & Law Firms
- Laxalt for Senate
- Laxalt Vance Victory Committee
- Lazard
- Lcv Victory Fund
- Le Monde
- Lead Encourage Elect PAC - Lee PAC
- Lead Left PAC
- Lead Maine Committee, Inc.
- Lead The Way PAC
- Leaders in Education
- Leaders We Deserve
- Leadership America Needs
- Leadership and Accountability Are National Keys PAC
- Leadership and Loyalty Only to America PAC
- Leadership for America Today Tomorrow and Always PAC
- Leadership for Enterprise and Opportunity PAC
- Leadership for Ohio Fund
- Leadership in Action
- Leadership Matters for America PAC, Inc.
- Leadership, Opportunity, Innovation Service PAC - Lois PAC
- Leading Democracy Inc
- Leading People Forward PAC
- Leading the Future
- Leading the PAC
- League of Conservation Voters
- League of Conservation Voters Action Fund
- League of Labor Voters
- Leah for Senate
- Leahy for U.s. Senator Committee
- Lee Enterprises
- Lee PAC
- Legal Services Corporation
- Legend Senior Living
- LEGPAC
- Lehigh Hanson, Inc. Political Action Committee
- Lehman Brothers
- LEIDOS
- Leidos Inc. Political Action Committee
- Leifer Capital Advisers, LLC
- Lemon Wallet
- Lendingtree LLC Political Action Committee
- Leo Burnett
- Leon Medical Centers
- Leonardo Drs PAC
- Leslie Cockburn for Congress
- LESSIG2016.US
- Let America Vote PAC
- Let's All Keep Electing Republicans PAC
- Let's Get It Done PAC
- Lets Get to Work PAC
- Lex Fridman Podcast
- Lexington Fund
- Lgbtq Victory Fund Federal PAC
- LGBTQ+ Victory Fund
- Lhc Group, Inc. PAC
- Libertarian Party of Colorado
- Liberty Central
- Liberty Fund
- Liberty Media
- Liberty Mutual Insurance Company - PAC
- Liccardo for Congress
- Liccardo Victory Fund
- Lifebox
- Lifepoint Health PAC - the PAC of Lifepoint Corporate Services, General Partnership (Lcsgp) and Facilities Which Are Subsidiaries of Lifepoint Health (Collectively Lifepoint)
- Liftoff PAC
- Lightspeed Venture Partners
- Lincoln Club of Northern California Federal PAC
- Lincoln National Corporation Political Action Committee (Aka Lincoln Financial Group Political Action Committee, Lfgpac)
- Linda Coleman for Congress
- Lindsay for Iowa
- Lindsey Boylan for Congress
- Lindsey Graham 2016
- Lisa Blunt Rochester for Congress
- Lisa Murkowski for Us Senate
- Listen to Us
- Liuba for Congress
- Live Oak Bank Political Action Committee
- LiveRamp
- Liz for Ny
- Liz Mathis for Congress
- Lizzie Fletcher Victory Fund
- Lkq Corporation Employee Good Government Fund
- Lmg PAC
- Loan Syndications and Trading Association PAC
- Lobo PAC
- Local 18 Water and Power Defense League (Ibew)
- Local 30 International Union of Operating Engineers Political Action Committee
- Local 881 United Food and Commercial Workers Political Action Fund
- Local Voices
- Locke Lord LLP PAC
- Lockheed Martin
- Lockheed Martin Corporation Employees' Political Action Committee
- Lockton Inc Polictical Action Committee
- Lofgren for Congress
- Lofgren Victory Fund
- Log Cabin Republicans PAC
- Lone Star Leadership PAC
- Lone Star Liberty PAC
- Lone Star Rising
- Lone Star Rising PAC
- Loopt
- Los Angeles County Lincoln Club
- Los Angeles County Young Democrats Federal PAC
- Los Angeles Times
- Los Angeles Women's Giving Collective PAC
- Los Angeles/Orange Counties Building and Construction Trades Council Federal Political Action Committee (PAC)
- Lou Correa for Congress
- Loudermilk for Congress
- Louis Dreyfus Company LLC Political Action Committee
- Louise Slaughter Re-Election Committee
- Louisiana Families First PAC
- Louisiana First Victory Fund
- Louisiana Freedom Fund
- Louisiana Reform PAC
- Louisiana Rice Political Action Committee, Inc.
- Louisiana Sheriffs and Deputies Political Action Committee
- Louisiana State University School of Medicine
- Lowcountry Conservatives
- Lowe's Companies, Inc. Political Action Committee
- Lowenstein Sandler LLP
- LPAC
- Lpl Financial LLC Political Action Committee (Lpl PAC)
- Lseg Us Holdco Inc. PAC (Lseg Us PAC)
- Luann Bennett for Congress
- Luchadora PAC
- Lujan Victory Fund
- Luke Bronin for Congress
- Lulu for Texas
- Lundbeck LLC Employee Political Action Committee
- Lupe Votes
- Lux Capital
- Lv Strong
- Lyft
- Lynde and Harry Bradley Foundation
- Lynn PAC
- M-PAC
- Machinists Non Partisan Political League of the International Association of Machinists & Aerospace Workers
- Mackenzie for America
- Mackenzie for Congress Committee
- Macmillan Publishers
- Macomb County Prosecutor's Office
- Madison PAC; The
- Madison Project Inc.
- MAGA Inc.
- Maga Ky
- Magaziner for Congress
- Maggie for Congress
- Maggie for Nh
- Maggie Hassan Victory Fund
- Maggie's List
- Maha Alliance
- Maha PAC
- MailOnline
- Maine AFL-CIO
- Maine Democratic Party
- Maine Education Association
- Maine House of Representatives
- Maine Secretary of State
- Maine Senate
- Maine State Auditor
- Mainstream Colorado Fund
- Mainstream Democrats PAC
- Mainstream PAC
- Maintaining All Republicans in Office PAC
- Maintaining American Competitiveness PAC
- Majority Committee PAC--Mc PAC
- Majority Forward
- Majority Fund
- Majority in Action
- Majority PAC
- Make America Great Again Action Inc
- Make America Great Again Inc.
- Make America Healthy Again (Maha) PAC
- Make America Number 1
- Make Dc Listen PAC
- Make It Work PAC
- Make Liberty Win
- Make Montana Great
- Make the Road Action Political Committee
- Making a Responsible Stand for Households in America PAC
- Making a Sensible Shift in Elections (Massie PAC)
- Making America Prosperous PAC
- Making Americans Count PAC (Mac PAC)
- Making Business Excel Political Action Committee
- Malcolm PAC
- Mallinckrodt LLC Political Action Committee
- Maloney Victory Fund
- Man Group