Form 15644 windows opening in October 2026
Groups whose yearly Form 15644 window opens in October 2026: usually those whose fiscal year ends in January. Useful for planning a season of filings.
IRS EO BMF, posted Oct 13, 2026
1,401 groups, page 1 of 6. Sorted by chapters on file, largest first.
- Knights of Columbus
- American Legion
- Toastmasters International
- American Federation of State County & Municipal Employees
- Modern Woodmen of America
- Little League Baseball Inc
- National Society of the Daughters of the American Revolution
- United Steelworkers
- Phi Theta Kappa
- Tops Club Inc
- Alpha Kappa Alpha Sorority Inc
- Disabled American Veterans
- United States Bowling Congress Inc
- National Association for the Advancement of Colored People
- Future Farmers of America State Associations & Local Chapter
- Woodmen of the World Life Insurance Society
- Grand Lodge of Texas
- Rocky Mountain Elk Foundation Inc
- National Active and Retired Federal Employees Association
- AARP
- Nebraska 4-H Foundation
- International Association of Machinists & Aerospace Grand Lodge
- American Federation of Government Employees
- International Union United Auto Aerospace & Agricultural Workers
- Road Runners Club of America Inc
- International Association of Sheet Metal Air Rail and Transportation
- Brotherhood of Locomotive Engineers & Trainmen
- National Society of the Sons of the American Revolution
- Disabled American Veterans Auxiliary Inc
- International Order of the Rainbow Girls Supreme Assembly
- The Compassionate Friends Inc
- American Postal Workers Union
- Society for Preservation & Encrgmnt of Barbershop Quartet
- National Air Traffic Controllers
- Demolay International
- First Catholic Slovak Ladies Assoc of the USA
- Scholarship America Inc
- Trusted Fraternal Life
- Ancient Free & Accepted Masons of North Carolina Grand Lodge
- International Brotherhood of Teamsters
- Laborers International Union of North America
- Boy Scouts of America
- The United States Pony Clubs Inc
- Delta Sigma Theta Sorority Inc
- Workers United
- Right Worshipful Grand Lodge of the Most Ancient and Honorable Fratern
- Oklahoma Home and Community Education Inc
- Free and Accepted Masons of New York
- International Union of Painters and Allied Trades
- New Jersey State Policemens Benevolent Association
- Knights of Peter Claver
- Sons of Norway
- Embroiderers Guild of America Inc
- Polish Roman Catholic Union of America
- Farmers Educational and Cooperative Union of America
- United Brotherhood of Carpenters & Joiners of America
- United Mine Workers of America- International
- Grand Lodge a F & a M of VA
- Free & Accepted Masons of Tennessee Grand Lodge
- American Chemical Society
- Ancient & Accepted Scottish Rite of Free Masonry So Juris USA
- National Society United States Daughters of 1812
- Catholic Order of Foresters
- National Deer Association
- United Food and Commercial Workers International Union
- American Youth Football Inc
- Oncology Nursing Society
- Blue Knights Motorcycle Club
- National Society Daughters of the American Colonists
- Military Order of the Cootie of the United States
- Oregon State Grange Patrons of Husbandry
- Improved Benevolent & Protective Order of Elks of the World
- Daughters of Isis of North & South America
- Order of Eastern Star Prince Hall Affiliation of Louisiana
- The Mended Hearts Inc
- Utility Workers Union of America
- Credit Union Department of the State of Texas
- American Volkssport Association Inc
- Croatian Fraternal Union of America
- Free & Accepted Masons of Arkansas
- Georgia Extension 4-H Foundation Inc
- Kappa Psi Pharmaceutical Fraternity Inc
- United States Junior Chamber of Commerce
- American Rose Society
- Association of Operating Room Nurses Inc
- Air Force Sergeants Association
- Izaak Walton League of America Inc
- Free & Accepted Masons of Mississippi Grand Lodge
- Association of Fundraising Professionals
- Arnold Air Society-Silver Wings Exec Mgmt Center
- Polish National Alliance of the United States of North America
- Grand Boule of the Sigma Pi Phi Fraternity
- Transportation-Communications Union
- Wally Byam Caravan Club International Inc
- Travelers Protective Assn of America
- Blacks in Government
- New Hampshire 4-H Association
- Air & Space Forces Association
- League of United Latin American Citizens
- National Association of Retired and Veteran Railway Employees Inc
- American Sewing Guild Inc
- Recreation Centers of Sun City Inc
- Country Dance & Song Society Inc
- Hermann Sons Life
- Institute of Internal Auditors
- Project Management Institute Inc
- Vasa Order of America the Grand Lodge
- Grand Lodge Free and Accepted Masons of Wisconsin
- Altrusa International Foundation Inc
- Ruffed Grouse Society
- American Federation of Musicians of the US & Canada
- Executive Womens Golf Association Inc
- Pennsylvania Citizens for Better Libraries
- Serra International
- Sigma Phi Gamma International Sorority Inc
- Society of Former Special Agents of the Fbi Inc
- Credit Unions Chartered in the State of Michigan
- Italian Catholic Federation of Calif Inc Central Council
- Public Relations Society of America Inc
- American Association of Zoo Keepers
- Betterlife
- Friends of Mississippi Libraries Inc
- Federated Garden Clubs of Connecticut Inc
- National AMBUCS Inc
- Catholic Schoolhouse Inc
- Air Line Pilots Association International
- American Board of Trial Advocates
- Free & Accepted Masons of Nebraska Grand Lodge of the Most Ancient &
- National Alliance of Postal and Federal Employees
- Sigma Phi Alpha Dental Hygiene Honor Society
- Sons in Retirement Incorporated
- Phi Delta Epsilon Medical Fraternity Inc
- Credit Unions in the State of California
- International Association of Electrical Inspectors
- Free & Accepted Masons of New Jersey
- National Association for Black Veterans Inc
- National Organization for Women Inc
- Ohio Chartered Credit Unions
- Service Employees International Union
- Indiana Farm Bureau
- UNITE Here
- Association of Traditional Hooking Artists
- Legatus
- International Longshoremens Association AFL - CIO
- Bakery Confectionery Tobacco Workers and Grain Millers Intl Uni
- Military Order of the World Wars Inc
- Mortar Board Inc
- Grand Lodge of the English Language Jurisdiction of the Ancient Mystic
- Catholic Union of Texas the KJT
- Fly Fishers International Inc
- Slavonic Benevolent Order of the State of Texas
- Army Aviation Association of America Inc
- Japanese American Citizens League
- Society of American Military Engineers
- Ancient Egyptian Arabic Order Nobles Mystic Shrine of N & S Amer
- Reserve Officers Association of the United States
- Knight Masons of the USA
- National Association of Teachers of Singing Inc
- Navy League of the United States National Headquarters
- Confrerie de-la-Chaine des Rotisseurs Ltd
- Csa Fraternal Life
- Public Employee Retirees Inc
- California State Grange
- American Dental Assistants Association
- Associated Builders & Contractors Inc
- International Association of Heat & Frost Insulators & Allied Workers
- Rolling Thunder Inc
- Texas Extension Education Association
- Texas Water Utilities Association
- Slovene National Benefit Society
- Ancient Free & Accepted Masons of Maryland Grand Lodge
- Appraisal Institute
- Financial Planning Association
- Smocking Arts Guild of America Inc
- United Ostomy Associations of America Inc
- Ancient Free & Accepted Masons of Colorado Grand Lodge
- Association for Professionals in Infection Ctrl & Epidemiology Inc
- Association of Civilian Technicians Inc
- Order of United Commercial Travelers of America
- United States Coast Guard Chief Petty Officers Association
- Women in Aviation International
- Federated Garden Clubs of Maryland Inc
- Credit Unions Chartered in the State of Tennessee
- International Mountain Bicycling Association
- National Black Nurses Association Inc
- Gleaner Life Insurance Society
- Ukrainian National Womens League of America Inc
- Information Systems Audit and Control Association Inc
- Order of the Eastern Star Inc
- Free & Accepted Masons of New Hampshire Grand Lodge
- Institute of Real Estate Management of the Natl Assn of Realtors
- Society of Manufacturing Engineers
- American Society for Training and Development
- BMW Car Club of America Inc
- Grand Chapter of Iowa OES
- Operative Plasterers & Cement Masons International Association
- Slow Food U S a Inc
- American Student Dental Association
- Emergency Nurses Association
- National Federation of the Blind of South Carolina
- National Kitchen & Bath Assoc
- American Pharmacists Association
- Depression and Bipolar Support Alliance
- Retail Wholesale & Department Store Union
- 82d Airborne Division Association Inc
- Asm International
- Slovak Catholic Sokol
- American Nephrology Nurses Association
- Association of Camps Farthest Out Inc
- Free & Accepted Masons of Vermont
- Better World Fund
- KJZT Family Life
- Delta Sigma Delta Fraternity
- Luso-American Financial a Fraternal Benefit Society
- USA Swimming Inc
- Foundation Communities Inc
- Mercedes Benz Club of America
- National Association of Charitable Gift Planners Inc
- NDC Housing and Economic Development Corporation
- Alpha Chi Sigma Fraternity Natl Office
- Gigis Playhouse Inc
- National Christian Charitable Foundation
- Polish Falcons of America
- Benevolent Patriotic Order of Does of the United States of America
- Cooperative Extension Assoc in the State of New York
- Forest Hills PTO & Boosters Council
- National Organization of Black Law Enforcement Executives Noble
- USA Boxing Inc
- American College of Healthcare Executives
- American Statistical Association
- Green Valley Recreation Incorporated
- International Union of Bricklayers and Allied Craftworkers
- American Fisheries Society Inc
- American Society for Public Administration
- Association of Energy Engineers Inc
- Child Evangelism Fellowship Inc
- Credit Unions in the State of Minnesota
- The Cleveland Clinic Foundation
- National Association of Pediatrics Nurse Practitioners
- Tall Cedars of Lebanon of North America Supreme Forest
- Information Systems Security Association
- People Inc
- Veterans for Peace Inc
- Wisconsin Association for Home and Community Education Inc
- Alliance of Bikers Aimed Toward Education
- Church Management & Tax Conference Inc
- Grand Order of the Eastern Star of Virginia Pha
- Union of California State Workers
- American Humanist Association
- American Psychological Association