| NATIONAL ASSOCIATION FOR THE EXCHANGE OF INDUSTRIAL RESOURCES I | $103,631,099 | S03 | published | | Galesburg, IL | 2024 |
| INTERNATIONAL FINANCIAL REPORTING STANDARDS FOUNDATION | $85,510,512 | S03 | published | | San Francisco, CA | 2025 |
| NATIONAL CONFECTIONERS ASSOCIATION | $32,507,417 | S03 | inferred 0.80 | science: research education | Washington, DC | 2024 |
| AMERICAN SOCIETY FOR QUALITY INC | $26,584,425 | S03 | published | | Milwaukee, WI | 2024 |
| SOCIETY OF CHARTERED PROPERTY & CASUALTY UNDERWRITERS INC | $26,172,531 | S03 | inferred 0.80 | | Malvern, PA | 2024 |
| PIPELINE RESEARCH COUNCIL INTERNATIONAL INC | $21,896,653 | S03 | published | | Chantilly, VA | 2024 |
| RVC SEATTLE | $19,903,729 | S03 | published | women: issues | Seattle, WA | 2024 |
| AMERICAN PLANNING ASSOCIATION | $19,898,169 | S03 | published | | Chicago, IL | 2024 |
| COMMUNITY ASSOCIATIONS INSTITUTE | $19,898,142 | S03 | inferred 0.50 | | Falls Church, VA | 2024 |
| SHEET METAL & AIR CONDITIONING CONTRACTORS NATL ASSN INC | $19,460,950 | S03 | inferred 0.80 | | Chantilly, VA | 2024 |
| ASSOCIATION FOR IRON AND STEEL TECHNOLOGY | $15,608,910 | S03 | published | science: research education | Warrendale, PA | 2024 |
| ASSOCIATION FOR MATERIALS PROTECTION AND PERFORMANCES INC | $13,954,695 | S03 | published | | Houston, TX | 2024 |
| AMERICAN ASSOCIATION OF UNIVERSITY PROFESSORS | $12,180,905 | S03 | published | | Washington, DC | 2024 |
| ASSOCIATION OF UNIVERSITY TECHNOLOGY MANAGERS | $12,031,425 | S03 | inferred 0.45 | | Washington, DC | 2024 |
| ARKANSAS BLACK MAYORS ASSOCIATION INC | $12,016,164 | S03 | published | | Little Rock, AR | 2024 |
| ASSOCIATION OF HOME APPLIANCE MANUFACTURERS | $10,815,917 | S03 | inferred 0.80 | | Washington, DC | 2024 |
| EFFIE WORLDWIDE INC | $10,059,828 | S03 | published | | New York, NY | 2024 |
| ILLINOIS CPA SOCIETY | $9,797,538 | S03 | inferred 0.60 | | Chicago, IL | 2024 |
| MICHIGAN COMMUNITY ACTION | $9,248,679 | S03 | published | | Okemos, MI | 2024 |
| TEXAS SOCIETY OF CERTIFIED PUBLIC ACCOUNTANTS | $7,845,670 | S03 | inferred 0.50 | | Addison, TX | 2024 |
| CPAMERICA INC | $7,739,041 | S03 | inferred 0.55 | | Gainesville, FL | 2025 |
| LEARNING UNDEFEATED INC | $7,593,725 | S03 | published | science: research education | Gaithersburg, MD | 2024 |
| TRANSPORTATION INTERMEDIARIES ASSOCIATION INC | $7,588,006 | S03 | inferred 0.80 | | Alexandria, VA | 2025 |
| MICHIGAN ASSOCIATION OF CERTIFIED PUBLIC ACCOUNTANTS | $7,389,922 | S03 | inferred 0.72 | | Troy, MI | 2024 |
| NATIONAL ASSOCIATION OF FLEET ADMINISTRATORS INC | $6,387,628 | S03 | inferred 0.85 | | Edison, NJ | 2025 |
| AMERICAN SUPPLY ASSOCIATION | $5,276,726 | S03 | inferred 0.80 | | Itasca, IL | 2024 |
| COMMUNITY ACTION ASSOCIATION OF PENNSYLVANIA | $5,130,762 | S03 | published | | Palmyra, PA | 2024 |
| ORTHOFORUM INC | $4,649,029 | S03 | published | | Knoxville, TN | 2025 |
| COMPOSITE PANEL ASSOCIATION | $4,255,368 | S03 | inferred 0.80 | | Leesburg, VA | 2025 |
| NATIONAL HISPANIC MEDICAL ASSOCIATION | $3,657,205 | S03 | published | | Washington, DC | 2024 |
| NATIONAL UTILITY CONTRACTORS ASSOCIATION INC | $3,161,134 | S03 | published | | Fairfax, VA | 2024 |
| TENNESSEE ROAD BUILDERS ASSOCIATION | $3,137,088 | S03 | inferred 0.80 | | Nashville, TN | 2025 |
| WOMEN CORPORATE DIRECTORS EDUCATION AND DEVELOPMENT FOUNDATION INC | $3,023,590 | S03 | published | women: issues | Palm Bch Gdns, FL | 2024 |
| ENERGY COMMUNITIES ALLIANCE INC | $2,775,179 | S03 | published | | Washington, DC | 2024 |
| ASSOCIATED ELECTRICAL CONTRACTORS OF CENTRAL OHIO | $2,745,426 | S03 | inferred 0.80 | | Columbus, OH | 2024 |
| WOMEN BUSINESS LEADERS OF THE U S HEALTH CARE INDUSTRY FOUNDATION | $2,469,263 | S03 | published | women: issues | Washington, DC | 2024 |
| ARIZONA WOMENS BUSINESS ENTERPRISE COUNCIL | $2,455,438 | S03 | published | women: issues | Mesa, AZ | 2024 |
| NATIONAL BOARD OF PUBLIC HEALTHEXAMINERS | $2,283,725 | S03 | published | | Arlington, VA | 2024 |
| FLORIDA RETAIL FEDERATION INC | $2,210,466 | S03 | inferred 0.80 | | Tallahassee, FL | 2025 |
| APRA | $2,010,600 | S03 | inferred 0.60 | | Leesburg, VA | 2025 |
| SOUTHWEST OFFICIALS ASSOCIATION INC | $1,975,922 | S03 | published | | Richardson, TX | 2024 |
| ASSOCIATION OF ASIAN AMERICAN INVESTMENT MANAGERS | $1,921,346 | S03 | published | women: issues | San Francisco, CA | 2024 |
| SHERIFF ACCOUNTABILITY ACTION | $1,899,934 | S03 | published | | Durham, NC | 2024 |
| PET INDUSTRY DISTRIBUTORS ASSOCIATION | $1,865,117 | S03 | inferred 0.80 | | Southeastern, PA | 2025 |
| NATIONAL COUNCIL ON WEIGHTS AND MEASURES | $1,858,261 | S03 | inferred 0.80 | | Lincoln, NE | 2024 |
| NEW MEXICO RURAL WATER USERS ASSOCIATION INC | $1,801,268 | S03 | inferred 0.70 | | Albuquerque, NM | 2024 |
| ASSOCIATED GENERAL CONTRACTORS OF OHIO | $1,793,698 | S03 | inferred 0.80 | | Columbus, OH | 2024 |
| ASSOCIATED CONTRACTORS OF NEW MEXICO | $1,763,700 | S03 | inferred 0.80 | | Albuquerque, NM | 2024 |
| COUNCIL FOR INCLUSIVE CAPITALISM INC | $1,754,123 | S03 | published | | New York, NY | 2024 |
| NATIONAL ASSOCIATION OF SECRETARIES OF STATE INC | $1,708,622 | S03 | published | | Washington, DC | 2024 |
| AMERICAN LEGAL & FINANCIAL NETWORK | $1,673,935 | S03 | published | women: issues | Saint Louis, MO | 2024 |
| INTERNATIONAL CENTER FOR PROFESSIONAL DEVELOPMENT | $1,580,173 | S03 | published | science: research education | Murrieta, CA | 2024 |
| GEOPROFESSIONAL BUSINESS ASSOCIATION | $1,577,762 | S03 | inferred 0.80 | science: research education | Rockville, MD | 2024 |
| NATIONAL ASSOCIATION OF CHAPTER 13 TRUSTEES | $1,499,027 | S03 | inferred 0.50 | | Columbia, SC | 2024 |
| THE FAMILY FIRM INSTITUTE INC | $1,464,753 | S03 | inferred 0.45 | | Boston, MA | 2024 |
| CALIFORNIA ASSOCIATION FOR LOCAL ECONOMIC DEVELOPMENT | $1,426,562 | S03 | inferred 0.60 | | Sacramento, CA | 2024 |
| SENIOR RESOURCES ALLIANCE | $1,330,037 | S03 | inferred 0.60 | | Mason, OH | 2012 |
| COALITION FOR DEEP SPACE EXPLORATION | $1,325,504 | S03 | published | launch: space | Washington, DC | 2024 |
| ALLIANCE OF WOMEN DIRECTORS | $1,324,265 | S03 | published | women: issues | Los Angeles, CA | 2025 |
| CALIFORNIA ASSOCIATION OF CODE ENFORCEMENT OFFICERS | $1,261,921 | S03 | inferred 0.55 | | Sacramento, CA | 2024 |
| LOUISIANA ASSESSORS ASSOCIATION | $1,213,196 | S03 | inferred 0.60 | | Baton Rouge, LA | 2024 |
| ALLIANCE FOR SAFE ONLINE PHARMACIES | $1,130,129 | S03 | published | | Washington, DC | 2024 |
| PROFESSIONAL ASIAN PILOTS ASSOCIATION | $1,126,261 | S03 | published | | Las Vegas, NV | 2025 |
| COMMUNITY ASSOCIATIONS INSTITUTE | $1,124,388 | S03 | inferred 0.80 | | Shoreline, WA | 2025 |
| ABILENE BOARD OF REALTORS INC | $1,113,167 | S03 | inferred 0.80 | | Abilene, TX | 2024 |
| WISCONSIN SOCIETY OF ARCHITECTS AMERICAN INSTITUTE OF ARCHITECTS | $1,062,449 | S03 | published | | Madison, WI | 2024 |
| ALEXANDRIA CHAMBER OF COMMERCE | $1,057,053 | S03 | inferred 0.60 | | Alexandria, VA | 2024 |
| HOUSTON CHAPTER AMERICAN CONCRETE INSTITUTE | $1,051,213 | S03 | published | | Houston, TX | 2024 |
| BUILDING OFFICIALS ASSOCIATION OF FLORIDA INC | $1,040,107 | S03 | published | | Deltona, FL | 2024 |
| AMERICAN SOCIETY OF PROFESSIONAL ESTIMATORS INC | $1,021,388 | S03 | published | | Nashville, TN | 2024 |
| SILICON COULOIR | $1,019,712 | S03 | published | | Jackson, WY | 2024 |
| Employers Resource Association Inc | $945,549 | S03 | inferred 0.80 | | Waukesha, WI | 2023 |
| MIDDLE TN BRANCH OF THE ASSOC GEN CONTRACTORS OF TN | $932,251 | S03 | inferred 0.80 | | Nashville, TN | 2024 |
| LEADINGAGE IOWA FKA IOWA ASSOCIATION | $926,772 | S03 | inferred 0.60 | | Lisle, IL | 2024 |
| OHIO MUNICIPAL ADVISORY COUNCIL | $919,292 | S03 | published | | Twinsburg, OH | 2025 |
| COMMUNITY ASSOCIATIONS INSTITUTE | $908,944 | S03 | inferred 0.80 | | Wellesley, MA | 2024 |
| WINDSTORM INSURANCE NETWORK INC | $904,002 | S03 | published | | Alexandria, VA | 2025 |
| COUNCIL OF STATE GOVERNMENTS | $902,987 | S03 | inferred 0.40 | | Lexington, KY | 2024 |
| TENNESSEE TELECOMMUNICATIONS ASSOCIATION | $870,264 | S03 | inferred 0.80 | | Mcminnville, TN | 2025 |
| OPERATING ENGINEERS CERTIFICATION PROGRAM | $854,667 | S03 | published | | Washington, DC | 2024 |
| THE PAMCANI ALLIANCE (FORMERLY KNOWN AS PAMCANI) | $829,291 | S03 | inferred 0.60 | | Downers Grove, IL | 2014 |
| LEADERSHIP METRO RICHMOND INC | $804,703 | S03 | published | | Richmond, VA | 2024 |
| CONNECTICUT MARINE TRADES ASSOCIATION INC | $802,252 | S03 | inferred 0.80 | | Essex, CT | 2024 |
| BETTER BUSINESS BUREAU OF CENTRAL ILLINOIS | $790,439 | S03 | inferred 0.70 | | Peoria, IL | 2025 |
| EDITORIAL FREELANCERS ASSOCIATION INC | $788,447 | S03 | inferred 0.45 | | New York, NY | 2024 |
| FIBER OPTICS ASSOCIATION INC | $781,218 | S03 | inferred 0.60 | | Santa Monica, CA | 2025 |
| SPECIAL POLICE OFFICERS ASSOCIATION INC | $775,362 | S03 | published | | San Francisco, CA | 2025 |
| DELAWARE HEALTHCARE FACILITIES ASSN | $738,336 | S03 | published | | Wilmington, DE | 2025 |
| NATIONAL ELECTRICAL CONTRACTORS ASSOCIATION NEBRASKA CHAPTER | $727,750 | S03 | inferred 0.75 | | Omaha, NE | 2024 |
| NATIONAL GUARDIANSHIP ASSOCIATION | $693,355 | S03 | inferred 0.45 | | Elizabethtown, PA | 2024 |
| BIOTECHNOLOGY ASSOCIATION OF MAINE | $676,073 | S03 | published | | Portland, ME | 2025 |
| NORTH DAKOTA CPA SOCIETY | $674,611 | S03 | inferred 0.55 | | Grand Forks, ND | 2024 |
| ESTATE PLANNING COUNCIL OF SEATTLE | $649,062 | S03 | inferred 0.45 | | Seattle, WA | 2024 |
| NJ ASSOC OF PLUMBING HEATING COOLING CONTRACTORS INC | $639,642 | S03 | published | | Red Bank, NJ | 2024 |
| RED BLUFF CHAMBER OF COMMERCE | $637,271 | S03 | inferred 0.80 | | Red Bluff, CA | 2024 |
| AUSTIN ASPIRES INC | $634,050 | S03 | published | | Austin, MN | 2025 |
| CONNECTICUT RIVER VALLEY CHAMBER OF COMMERCE | $627,515 | S03 | inferred 0.85 | women: issues | Glastonbury, CT | 2025 |
| WESTERN ASSOCIATION OF CHAMBER EXECUTIVES | $623,655 | S03 | inferred 0.80 | | Santa Maria, CA | 2024 |
| COMMUNITY ASSOCIATION INSTITUTE | $614,406 | S03 | inferred 0.45 | | Phoenix, AZ | 2025 |
| NUCA of Greater Kansas City Region | $608,313 | S03 | inferred 0.60 | | Kansas City, MO | 2025 |