| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | committee | $28.6M |
| BIGELOW, ROBERT T. | Individual | $22.4M |
| UA UNION PLUMBERS & PIPEFITTERS VOTE! PAC (UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF THE PLUMBING & PIPEFITTING INDUSTRY OF THE UNITED STATES AND CANADA) | committee | $19.7M |
| INTERNATIONAL UNION OF PAINTERS AND ALLIED TRADES POLITICAL ACTION TOGETHER POLITICAL COMMITTEE | committee | $14.6M |
| AMALGAMATED TRANSIT UNION - COPE | committee | $11.4M |
| LIPPE, DAVID | Individual | $10.3M |
| AIRCRAFT OWNERS AND PILOTS ASSOCIATION (POLITICAL ACTION COMMITTEE) | committee | $8.6M |
| AMERICAN PODIATRIC MEDICAL ASSOCIATION POLITICAL ACTION COMMITTEE | committee | $6.8M |
| SEAFARERS POLITICAL ACTIVITY DONATION - SEAFARERS INTERNATIONAL UNION OF NA-AGLIW | committee | $6.4M |
| NATIONAL NURSES UNITED | person | $5.4M |
| CLARK, ALFRED | Individual | $5.4M |
| AMERICAN NURSES ASSOCIATION PAC | committee | $5.4M |
| ANGELOS, PETER G. | Individual | $5.1M |
| BLUE DOG POLITICAL ACTION COMMITTEE | committee | $5.0M |
| AMERICAN ADVANCEMENT, INC. | person | $4.8M |
| UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF THE PIPE FITTING INDUSTRY | person | $3.8M |
| UNITED ASSOCIATION OF JOURNEYMEN & APPRENTICES OF THE PIPE FITTING INDUSTRY | person | $3.7M |
| UNITED ASSOCIATION OF JOURNEYMEN & APPRENTICES OF THE PIPEFITTING INDUSTRY | person | $3.6M |
| THE AMERICAN OCCUPATIONAL THERAPY ASSOCIATION, INC. POLITICAL ACTION COMMITTEE (AOTPAC) | committee | $3.5M |
| MASTERS, MATES AND PILOTS POLITICAL CONTRIBUTION FUND | committee | $3.3M |
| CASA IN ACTION | person | $3.2M |
| AMERICAN SPEECH-LANGUAGE-HEARING ASSOCIATION PAC (ASHA PAC) | committee | $3.0M |
| MR. SOUTHERN MISSOURIAN IN THE HOUSE PAC | committee | $3.0M |
| VICTORY NOW PAC | committee | $3.0M |
| MARRIOTT INTERNATIONAL, INC. POLITICAL ACTION COMMITTEE | committee | $2.7M |
| HELP AMERICA'S LEADERS POLITICAL ACTION COMMITTEE | committee | $2.6M |
| NATIONAL NURSES ORGANIZING COMMITTEE PAC | person | $2.5M |
| ZIRKIN, NANCY ZIRKIN | Individual | $2.5M |
| AMALGAMATED TRANSIT UNION | person | $2.4M |
| AUTO CARE ASSOCIATION POLITICAL ACTION COMMITTEE | committee | $2.4M |
| LEVINE, DAVID | Individual | $2.1M |
| BAINUM, STEWART W JR | Individual | $2.1M |
| GOLDBERG, HENRY H. | Individual | $2.1M |
| INTERNATIONAL ASSOCIATION OF HEAT AND FROST INSULATORS AND ALLIED WORKERS POLITICAL ACTION COMMITTEE | committee | $2.0M |
| AMERICAN ADVANCEMENT INC. | person | $1.9M |
| BAKERY, CONFECTIONERY, TOBACCO WORKERS AND GRAIN MILLERS INTERNATIONAL UNION PAC | committee | $1.9M |
| PECO ENERGY COMPANY | Individual | $1.9M |
| WELLNESS ADVOCACY FUND | person | $1.9M |
| FUTURE LEADERS POLITICAL ACTION COMMITTEE | committee | $1.8M |
| JOHNSTON, NEELE | Individual | $1.8M |
| ASSOCIATION OF KENTUCKY FRIED CHICKEN FRANCHISEES INC PAC | committee | $1.7M |
| SYNERGY PAC | committee | $1.7M |
| EUREKA POLITICAL ACTION COMMITTEE | committee | $1.7M |
| DEMOCRATS RESHAPING AMERICA (DREAMPAC) | committee | $1.7M |
| KLEIN, MICHAEL,, | Individual | $1.6M |
| GELMAN, MICHAEL | Individual | $1.6M |
| LAWSON, JEFF | Individual | $1.6M |
| EMERGENT BIOSOLUTIONS INC. EMPLOYEES PAC | committee | $1.6M |
| TRONE, DAVID J. | Individual | $1.5M |
| RESPONSIBLE CITIZENS POLITICAL LEAGUE A PROJECT OF THE TRANS. COMM. INT'L. UNION/IAM | committee | $1.5M |