| Progressive Turnout Project | PAC | | $47.3M | $42.7M |
| National Association of Realtors Political Action Committee | PAC | | $15.9M | $13.9M |
| Elect Chicago Women AKA ECW | Super PAC | | $11.3M | $10.8M |
| Stop Republicans | PAC | | $10.6M | $10.7M |
| Democracyfirst PAC | PAC | | $8.4M | $8.1M |
| Stop These Oppressive People: Tyrants Racists Unqualifieds Misogynists Propagandists (Stop Trump) | PAC | | $6.3M | $6.6M |
| Democratic Party of Illinois | Party committee | Democratic | $7.0M | $6.5M |
| Progressive Takeover | PAC | | $6.2M | $6.2M |
| DEM Turnout 2026 | PAC | | $4.8M | $4.7M |
| Affordable Chicago Now! (ACN) | Super PAC | | $4.5M | $4.4M |
| American Society of Anesthesiologists Political Action Committee (ASA PAC) | PAC | | $3.4M | $3.4M |
| National Association of Realtors Congressional Fund | Super PAC | | $18.7M | $2.7M |
| Chicago Progressive Partnership | Super PAC | | $2.0M | $2.0M |
| Back the Bold | PAC | | $2.6M | $2.0M |
| Illinois Republican Party - Federal | Party committee | Republican | $2.0M | $1.9M |
| American Association of Nurse Anesthetists Separate Segregated Fund (Crna-Pac) | PAC | | $1.9M | $1.9M |
| Development Now for Chicago | Party committee | Democratic | $1.7M | $1.8M |
| Abbott Laboratories Employee Political Action Committee | PAC | | $1.7M | $1.7M |
| DEM Turnout Fund | PAC | | $1.6M | $1.6M |
| American Property Casualty Insurance Association Political Action Committee (Insuring America PAC) | PAC | | $1.7M | $1.6M |
| Abbvie Political Action Committee | PAC | | $1.4M | $1.6M |
| International Union of Operating Engineers Local 150 Political Action Committee | PAC | | $1.6M | $1.4M |
| Reviving American Jobs Again PAC DBA Equal Opportunity Now | PAC | | $3.4M | $1.1M |
| American Alliance for Disabled Children PAC | Super PAC | | $1.1M | $1.1M |
| CME Group Inc. PAC | PAC | | $832K | $1.0M |
| Health Care Service Corporation Employees' Political Action Committee | PAC | | $970K | $972K |
| State Farm Mutual Automobile Insurance Company Federal Political Action Committee (State Farm Federal PAC) | PAC | | $1.3M | $835K |
| Stop Republicans 2026 | PAC | | $879K | $819K |
| United Airlines, Inc. Political Action Committee (Uapac) | PAC | | $733K | $782K |
| Joint Action Committee for Political Affairs | PAC | | $838K | $766K |
| Deere & Company PAC (AKA John Deere PAC) | PAC | | $658K | $717K |
| Mike Rogers Victory | PAC | | $663K | $653K |
| Progressive Turnout Project 2026 | PAC | | $807K | $635K |
| Mcdonalds Corporation Political Action Committee | PAC | | $736K | $592K |
| Midwest Region Laborers' Political League | PAC | | $966K | $544K |
| Allstate Insurance Company PAC | PAC | | $586K | $527K |
| American Association of Oral & Maxillofacial Surgeons Political Action Committee | PAC | | $430K | $489K |
| For Our Values PAC | Super PAC | | $496K | $461K |
| Alzheimers Impact Movement Political Action Committee | PAC | | $523K | $457K |
| BMO Financial Corp Good Governance Fund: Federal (BMO PAC) | PAC | | $265K | $419K |
| Level Up PAC | PAC | | $401K | $401K |
| The Grant Thornton Advisors LLC Political Action Committee | PAC | | $383K | $391K |
| Stronger Illinois PAC | Super PAC | | $362K | $361K |
| The Options Clearing Corporation PAC | PAC | | $370K | $355K |
| The L & C Coalition | Super PAC | | $322K | $342K |
| United Pilots Pac/United Airlines Master Executive Council | PAC | | $216K | $331K |
| Delta Dental Plans Association PAC | PAC | | $179K | $288K |
| Array Digital Infrastructure, Inc Political Action Committee | PAC | | $48K | $274K |
| Leading Democracy Inc | Super PAC | | $290K | $270K |
| Operating Engineers Local # 649 Political Action Committee | PAC | | $283K | $268K |
| Lundbeck LLC Employee Political Action Committee | PAC | | $211K | $263K |
| Astellas US LLC PAC (Astellas PAC) | PAC | | $283K | $250K |
| Faith and Family First Fund | PAC | | $251K | $236K |
| The Grassroots Patriot Project | PAC | | $339K | $229K |
| Cboe Global Markets, Inc. PAC (Cboe PAC) | PAC | | $465K | $222K |
| Primient PAC of Primary Products Ingredients Americas LLC | PAC | | $11K | $220K |
| Transunion Political Action Committee (TU PAC) | PAC | | $198K | $217K |
| Local 881 United Food and Commercial Workers Political Action Fund | PAC | | $222K | $212K |
| Archer Daniels Midland Company - ADM PAC | PAC | | $205K | $212K |
| Associated Equipment Distributors Political Action Committee | PAC | | $239K | $209K |
| AAR Corp. PAC | PAC | | $159K | $208K |
| Invenergy LLC PAC | PAC | | $222K | $200K |
| American Academy of Pediatric Dentistry Political Action Committee | PAC | | $266K | $183K |
| International Warehouse Logistics Association PAC | PAC | | $177K | $183K |
| Eric Sorensen Victory Fund | PAC | | $171K | $169K |
| Local 399 International Union of Operating Engineers Federal PAC (Local 399 Iuoe FED PAC) | PAC | | $259K | $166K |
| Society for Vascular Surgery Political Action Committee | PAC | | $150K | $158K |
| Conagra Brands, Inc. Good Government Association | PAC | | $150K | $154K |
| Plumbers and Pipefitters Local Union #25 Federal PAC Fund | PAC | | $152K | $152K |
| Rock Island County Democratic Central Committee | Party committee | Democratic | $174K | $148K |
| CNA Financial Corporation Citizens for Good Government | PAC | | $165K | $143K |
| Committee to Protect Health Care PAC | PAC | | $97K | $135K |
| Visionary PAC | Leadership PAC | | $89K | $131K |
| Storm PAC | Leadership PAC | | $121K | $130K |
| American Society of Plastic Surgeons Plastypac | PAC | | $150K | $126K |
| Illinois Agricultural Association Activator Political Involvement Fund (FED) 'Activator'/'Illinois Farm Bureau Activator' | PAC | | $201K | $123K |
| Option Care Health, Inc. PAC | PAC | | $117K | $120K |
| Illinois Corn Growers Association Political Involvement Fund-Federal | PAC | | $120K | $119K |
| New Trier Democratic Organization | Party committee | Democratic | $127K | $119K |
| Voters First Victory Fund | Super PAC | | $97K | $105K |
| Appraisal Institute PAC (AI PAC) | PAC | | $114K | $105K |
| Congressional Republican Organization of Illinois PAC | PAC | | $117K | $103K |
| Science Truth and Expertise Matter PAC | Leadership PAC | | $104K | $101K |
| Alpha Kappa Alpha Sorority PAC, Inc. (AKA AKA 1908 PAC) | PAC | | $73K | $99K |
| To Protect Our Heritage PAC | PAC | | $106K | $99K |
| Marquis Master Sc, Inc. PAC (Marquis PAC) | PAC | | $113K | $93K |
| America United | PAC | | $0 | $92K |
| American Property Casualty Insurance Association Federal Only Political Action Committee (Insuring America Fopac) | PAC | | $55K | $91K |
| Unity Solutions PAC | Super PAC | | $94K | $89K |
| Illinois Democratic County Chairs' Association | Party committee | Democratic | $82K | $86K |
| Illinois Political Active Letter Carriers | PAC | | $100K | $84K |
| Fostering Progress PAC | PAC | | $63K | $83K |
| Amsted Industries Incorporated PAC | PAC | | $62K | $83K |
| Prostate Cancer Research Political Action Committee (CAP PAC) | PAC | | $0 | $80K |
| Optiver Americas LLC PAC (Optiver PAC) | PAC | | $75K | $73K |
| International Union of Operating Engineers Local 965 PEF | PAC | | $149K | $73K |
| RWE Clean Energy Services, LLC PAC | PAC | | $89K | $72K |
| Future First Leadership PAC | Leadership PAC | | $56K | $70K |
| TD PAC | Super PAC | | $50K | $67K |
| Progressive Choices PAC | Leadership PAC | | $65K | $65K |
| Country Over Party PAC | PAC | Republican | $0 | $63K |
| EXP PAC | PAC | | $80K | $62K |
| AON Corporation Political Action Committee | PAC | | $49K | $61K |
| Amrize North America Inc. Employees PAC (AKA Amrize US Employees PAC) | PAC | | $42K | $61K |
| Torch PAC | Leadership PAC | | $126K | $60K |
| Sidley Austin LLP Good Government Fund | PAC | | $106K | $58K |
| American Supply Association Political Action Committee | PAC | | $82K | $54K |
| Coeur Mining, Inc. PAC | PAC | | $83K | $52K |
| Northern Trust Corporation Federal Political Action Committee (Northern Trust Federal PAC) | PAC | | $57K | $51K |
| Rooted & Ready PAC | Leadership PAC | | $62K | $51K |
| Second City Voter Coalition | Super PAC | | $50K | $50K |
| Superior Air-Ground Ambulance Service Inc Employees PAC (Superior Ambulance Employees P | PAC | | $45K | $48K |
| Illinois Tenth Congressional District Democrats | PAC | | $51K | $47K |
| Team Raja Victory Fund | PAC | | $48K | $47K |
| Tenth Congressional District Republican Organization | Party committee | Republican | $10K | $45K |
| Peoria PAC LLC | PAC | | $44K | $45K |
| PLS Financial Svcs Inc Good Neighbor Political Action Committe (PLS Good Neighbor PAC) | PAC | | $38K | $44K |
| Covista Inc. Political Action Committee (Covista PAC) | PAC | | $52K | $43K |
| Pain Free America, the Political Action Committee of Athletico Holdings, LLC | PAC | | $46K | $41K |
| American Academy of Sleep Medicine Political Action Committee | PAC | | $34K | $38K |
| Progressive Takeover Fund | PAC | | $193K | $37K |
| LET Experienced Pilots FLY PAC | PAC | | $50K | $35K |
| Illinois Against MAGA | Super PAC | | $37K | $31K |
| Perdoceo Education Corporation Political Action Committee | PAC | | $22K | $30K |
| Mason Contractors Association of America Political Action Commitee-Macpac | PAC | | $88K | $29K |
| Citadel Securities Political Action Committee (Citadel Securities PAC) | PAC | | $16K | $28K |
| Alliance for Black Equality | Super PAC | | $15K | $27K |
| Faith in America PAC | Leadership PAC | | $28K | $26K |
| Community Bankers Association of Illinois Fedpac | PAC | | $33K | $26K |
| Family-Pac Federal | PAC | | $25K | $26K |
| Gatx Corporation Good Government Program | PAC | | $38K | $25K |
| Mary Miller Victory Committee | PAC | | $24K | $25K |
| Hanson Professional Services Inc PAC | PAC | | $35K | $25K |
| Illinois Soybean Growers (ISG PAC) | PAC | | $26K | $24K |
| Illinois Bankers Association PAC (Illinois Bankers PAC) | PAC | | $35K | $22K |
| Transformative Change PAC | Leadership PAC | | $10K | $21K |
| Crawford Murphy & Tilly Inc PAC | PAC | | $36K | $21K |
| Libertarian Party of Illinois | Party committee | Libertarian | $20K | $19K |
| Illinois Green Party | Party committee | Green | $18K | $17K |
| Building Empowerment and Accountability Now (Bean) PAC | Leadership PAC | Democratic | $15K | $12K |
| Urban Progress Leadership PAC | Leadership PAC | | $11K | $8,387 |
| United for Progress Leadership Committee | Leadership PAC | | $7,931 | $8,229 |
| Brunswick Corporation Marine Policy Political Action Committee | PAC | | $59K | $7,512 |
| Citizens for the 16th | PAC | | $2,390 | $2,390 |
| Health Psychology Leadership Political Action Committee (PSY PAC) | Leadership PAC | | $21 | $0 |
| Justice for All National Committee | Party committee | Independent | $2,615 | $0 |
| CHI PAC | Leadership PAC | | $100 | $0 |