| Progressive Turnout Project | PAC | | $44.0M | $35.8M |
| National Association of Realtors Political Action Committee | PAC | | $15.6M | $13.6M |
| Elect Chicago Women AKA ECW | Super PAC | | $11.3M | $10.8M |
| Stop Republicans | PAC | | $9.3M | $9.1M |
| Democracyfirst PAC | PAC | | $7.9M | $7.5M |
| Democratic Party of Illinois | Party committee | Democratic | $6.0M | $5.9M |
| Stop These Oppressive People: Tyrants Racists Unqualifieds Misogynists Propagandists (Stop Trump) | PAC | | $5.7M | $5.9M |
| Progressive Takeover | PAC | | $5.6M | $5.7M |
| Affordable Chicago Now! (ACN) | Super PAC | | $4.5M | $4.4M |
| DEM Turnout 2026 | PAC | | $4.6M | $4.4M |
| American Society of Anesthesiologists Political Action Committee (ASA PAC) | PAC | | $3.1M | $2.9M |
| National Association of Realtors Congressional Fund | Super PAC | | $2.7M | $2.6M |
| Chicago Progressive Partnership | Super PAC | | $2.0M | $2.0M |
| Illinois Republican Party - Federal | Party committee | Republican | $2.0M | $1.8M |
| Development Now for Chicago | Party committee | Democratic | $1.6M | $1.7M |
| Abbott Laboratories Employee Political Action Committee | PAC | | $1.6M | $1.7M |
| DEM Turnout Fund | PAC | | $1.5M | $1.5M |
| Abbvie Political Action Committee | PAC | | $1.3M | $1.4M |
| American Property Casualty Insurance Association Political Action Committee (Insuring America PAC) | PAC | | $1.5M | $1.3M |
| Back the Bold | PAC | | $565K | $1.2M |
| American Alliance for Disabled Children PAC | Super PAC | | $1.1M | $1.1M |
| Reviving American Jobs Again PAC DBA Equal Opportunity Now | PAC | | $3.3M | $1.1M |
| American Association of Nurse Anesthetists Separate Segregated Fund (Crna-Pac) | PAC | | $1.7M | $981K |
| CME Group Inc. PAC | PAC | | $781K | $944K |
| State Farm Mutual Automobile Insurance Company Federal Political Action Committee (State Farm Federal PAC) | PAC | | $1.2M | $789K |
| Health Care Service Corporation Employees' Political Action Committee | PAC | | $919K | $777K |
| Joint Action Committee for Political Affairs | PAC | | $820K | $735K |
| United Airlines, Inc. Political Action Committee (Uapac) | PAC | | $647K | $640K |
| Mike Rogers Victory | PAC | | $648K | $633K |
| Deere & Company PAC (AKA John Deere PAC) | PAC | | $595K | $589K |
| Stop Republicans 2026 | PAC | | $737K | $554K |
| Mcdonalds Corporation Political Action Committee | PAC | | $714K | $521K |
| Allstate Insurance Company PAC | PAC | | $537K | $477K |
| Alzheimers Impact Movement Political Action Committee | PAC | | $517K | $455K |
| Midwest Region Laborers' Political League | PAC | | $909K | $423K |
| BMO Financial Corp Good Governance Fund: Federal (BMO PAC) | PAC | | $249K | $415K |
| Level Up PAC | PAC | | $401K | $396K |
| The Grant Thornton Advisors LLC Political Action Committee | PAC | | $372K | $391K |
| International Union of Operating Engineers Local 150 Political Action Committee | PAC | | $1.3M | $365K |
| Stronger Illinois PAC | Super PAC | | $359K | $358K |
| The Options Clearing Corporation PAC | PAC | | $335K | $344K |
| The L & C Coalition | Super PAC | | $322K | $342K |
| American Association of Oral & Maxillofacial Surgeons Political Action Committee | PAC | | $353K | $317K |
| Progressive Turnout Project 2026 | PAC | | $536K | $292K |
| Array Digital Infrastructure, Inc Political Action Committee | PAC | | $48K | $272K |
| Leading Democracy Inc | Super PAC | | $290K | $270K |
| United Pilots Pac/United Airlines Master Executive Council | PAC | | $200K | $264K |
| Astellas US LLC PAC (Astellas PAC) | PAC | | $243K | $235K |
| Delta Dental Plans Association PAC | PAC | | $174K | $231K |
| Lundbeck LLC Employee Political Action Committee | PAC | | $179K | $222K |
| Primient PAC of Primary Products Ingredients Americas LLC | PAC | | $8,980 | $220K |
| Associated Equipment Distributors Political Action Committee | PAC | | $239K | $206K |
| Transunion Political Action Committee (TU PAC) | PAC | | $190K | $204K |
| AAR Corp. PAC | PAC | | $152K | $201K |
| Local 881 United Food and Commercial Workers Political Action Fund | PAC | | $154K | $197K |
| Archer Daniels Midland Company - ADM PAC | PAC | | $195K | $194K |
| Invenergy LLC PAC | PAC | | $210K | $171K |
| Local 399 International Union of Operating Engineers Federal PAC (Local 399 Iuoe FED PAC) | PAC | | $208K | $165K |
| The Grassroots Patriot Project | PAC | | $208K | $151K |
| Cboe Global Markets, Inc. PAC (Cboe PAC) | PAC | | $423K | $149K |
| American Academy of Pediatric Dentistry Political Action Committee | PAC | | $228K | $143K |
| CNA Financial Corporation Citizens for Good Government | PAC | | $152K | $141K |
| International Warehouse Logistics Association PAC | PAC | | $177K | $134K |
| Rock Island County Democratic Central Committee | Party committee | Democratic | $163K | $134K |
| Operating Engineers Local # 649 Political Action Committee | PAC | | $175K | $130K |
| Plumbers and Pipefitters Local Union #25 Federal PAC Fund | PAC | | $130K | $130K |
| Faith and Family First Fund | PAC | | $166K | $126K |
| Storm PAC | Leadership PAC | | $118K | $126K |
| Committee to Protect Health Care PAC | PAC | | $95K | $125K |
| Eric Sorensen Victory Fund | PAC | | $137K | $125K |
| American Society of Plastic Surgeons Plastypac | PAC | | $136K | $124K |
| Society for Vascular Surgery Political Action Committee | PAC | | $141K | $124K |
| Visionary PAC | Leadership PAC | | $89K | $123K |
| Illinois Agricultural Association Activator Political Involvement Fund (FED) 'Activator'/'Illinois Farm Bureau Activator' | PAC | | $172K | $120K |
| For Our Values PAC | Super PAC | | $149K | $120K |
| Conagra Brands, Inc. Good Government Association | PAC | | $134K | $113K |
| Option Care Health, Inc. PAC | PAC | | $111K | $107K |
| Appraisal Institute PAC (AI PAC) | PAC | | $114K | $103K |
| New Trier Democratic Organization | Party committee | Democratic | $92K | $101K |
| To Protect Our Heritage PAC | PAC | | $105K | $98K |
| America United | PAC | | $0 | $90K |
| Unity Solutions PAC | Super PAC | | $94K | $89K |
| Amsted Industries Incorporated PAC | PAC | | $62K | $83K |
| Illinois Political Active Letter Carriers | PAC | | $100K | $82K |
| Prostate Cancer Research Political Action Committee (CAP PAC) | PAC | | $0 | $80K |
| Fostering Progress PAC | PAC | | $62K | $77K |
| Marquis Master Sc, Inc. PAC (Marquis PAC) | PAC | | $103K | $74K |
| Illinois Corn Growers Association Political Involvement Fund-Federal | PAC | | $88K | $73K |
| Optiver Americas LLC PAC (Optiver PAC) | PAC | | $75K | $73K |
| International Union of Operating Engineers Local 965 PEF | PAC | | $122K | $73K |
| Science Truth and Expertise Matter PAC | Leadership PAC | | $82K | $72K |
| Future First Leadership PAC | Leadership PAC | | $56K | $70K |
| Illinois Democratic County Chairs' Association | Party committee | Democratic | $73K | $68K |
| Congressional Republican Organization of Illinois PAC | PAC | | $68K | $67K |
| Progressive Choices PAC | Leadership PAC | | $55K | $65K |
| TD PAC | Super PAC | | $0 | $64K |
| Country Over Party PAC | PAC | Republican | $0 | $63K |
| RWE Clean Energy Services, LLC PAC | PAC | | $75K | $63K |
| Amrize North America Inc. Employees PAC (AKA Amrize US Employees PAC) | PAC | | $40K | $60K |
| Voters First Victory Fund | Super PAC | | $86K | $58K |
| EXP PAC | PAC | | $75K | $57K |
| AON Corporation Political Action Committee | PAC | | $47K | $51K |
| Coeur Mining, Inc. PAC | PAC | | $69K | $51K |
| Rooted & Ready PAC | Leadership PAC | | $62K | $51K |
| Sidley Austin LLP Good Government Fund | PAC | | $106K | $50K |
| Second City Voter Coalition | Super PAC | | $50K | $50K |
| American Property Casualty Insurance Association Federal Only Political Action Committee (Insuring America Fopac) | PAC | | $55K | $48K |
| Superior Air-Ground Ambulance Service Inc Employees PAC (Superior Ambulance Employees P | PAC | | $43K | $47K |
| Team Raja Victory Fund | PAC | | $48K | $47K |
| Tenth Congressional District Republican Organization | Party committee | Republican | $10K | $45K |
| Peoria PAC LLC | PAC | | $44K | $45K |
| Northern Trust Corporation Federal Political Action Committee (Northern Trust Federal PAC) | PAC | | $36K | $43K |
| PLS Financial Svcs Inc Good Neighbor Political Action Committe (PLS Good Neighbor PAC) | PAC | | $30K | $39K |
| Pain Free America, the Political Action Committee of Athletico Holdings, LLC | PAC | | $40K | $39K |
| Alpha Kappa Alpha Sorority PAC, Inc. (AKA AKA 1908 PAC) | PAC | | $62K | $36K |
| Illinois Tenth Congressional District Democrats | PAC | | $38K | $34K |
| LET Experienced Pilots FLY PAC | PAC | | $41K | $33K |
| Covista Inc. Political Action Committee (Covista PAC) | PAC | | $34K | $33K |
| American Academy of Sleep Medicine Political Action Committee | PAC | | $33K | $30K |
| Mason Contractors Association of America Political Action Commitee-Macpac | PAC | | $78K | $29K |
| Perdoceo Education Corporation Political Action Committee | PAC | | $20K | $28K |
| Alliance for Black Equality | Super PAC | | $15K | $27K |
| Citadel Securities Political Action Committee (Citadel Securities PAC) | PAC | | $16K | $25K |
| Mary Miller Victory Committee | PAC | | $24K | $25K |
| Hanson Professional Services Inc PAC | PAC | | $35K | $25K |
| Illinois Against MAGA | Super PAC | | $32K | $24K |
| Illinois Bankers Association PAC (Illinois Bankers PAC) | PAC | | $33K | $22K |
| Transformative Change PAC | Leadership PAC | | $10K | $21K |
| Community Bankers Association of Illinois Fedpac | PAC | | $29K | $19K |
| Faith in America PAC | Leadership PAC | | $21K | $18K |
| Libertarian Party of Illinois | Party committee | Libertarian | $19K | $18K |
| Illinois Green Party | Party committee | Green | $18K | $17K |
| Illinois Soybean Growers (ISG PAC) | PAC | | $25K | $16K |
| Crawford Murphy & Tilly Inc PAC | PAC | | $31K | $15K |
| Gatx Corporation Good Government Program | PAC | | $31K | $13K |
| Urban Progress Leadership PAC | Leadership PAC | | $11K | $8,387 |
| Brunswick Corporation Marine Policy Political Action Committee | PAC | | $54K | $7,512 |
| United for Progress Leadership Committee | Leadership PAC | | $7,931 | $7,323 |
| American Supply Association Political Action Committee | PAC | | $67K | $7,240 |
| Citizens for the 16th | PAC | | $2,390 | $2,390 |
| Torch PAC | Leadership PAC | | $70K | $1,580 |
| Building Empowerment and Accountability Now PAC | Leadership PAC | Democratic | $8,650 | $368 |
| Health Psychology Leadership Political Action Committee (PSY PAC) | Leadership PAC | | $21 | $0 |
| Justice for All National Committee | Party committee | Independent | $2,615 | $0 |