| Buyers Protection Group | US | — | 1 |
| Buzzfeed Media Enterprises, Inc. | US | — | 1 |
| BW Homecare Holdings, LLC, | US | — | 1 |
| by Freedom Center of Rockland | US | — | 1 |
| Byline Bank | US | — | 1 |
| Byte Federal Inc. | US | — | 2 |
| BYU-Pathway | US | — | 1 |
| BYU-Pathway Worldwide | US | — | 2 |
| Byzfunder NY LLC | US | — | 2 |
| C.B. Fleet Company, Inc., a | US | — | 1 |
| C. B. King Memorial School | US | Healthcare | 1 |
| C&C Dental Family, PLLC | US | — | 1 |
| C.C. Filson, Co. | US | — | 1 |
| C.E. Floyd Company, Inc | US | — | 1 |
| C.H. Briggs | US | — | 1 |
| C.H Hanson Company | US | — | 1 |
| C.K.S Packaging, Inc. | US | — | 1 |
| C.N. Wood Co. Inc. | US | — | 1 |
| C. Overaa & Co. | US | — | 1 |
| C-P Flexible Packaging, Inc. | US | — | 2 |
| C.R. England, Inc. | US | — | 2 |
| C.S. McCrossan Inc. | US | — | 1 |
| C&S Wholesale Grocers, Inc. | US | — | 2 |
| C&S Wholesale Grocers, LLC | US | — | 1 |
| César Castillo, LLC | US | — | 1 |
| C Squared Systems, LLC | US | — | 1 |
| C2M LLC d/b/a Click2Mail | US | — | 1 |
| C2N Diagnostics, LLC | US | Healthcare | 1 |
| CA Department of Social Services | US | — | 1 |
| CA Department of State Hospitals | US | — | 3 |
| CA Department of State Hospitals - Coalinga | US | — | 1 |
| CA Dept. Developmental Services | US | — | 1 |
| Cabico & co | US | — | 1 |
| Cabinets 2000, LLC | US | — | 1 |
| Cable One, Inc. | US | Media | 1 |
| Cabot Medical Care | US | — | 1 |
| Cabot Packing LLC | US | — | 1 |
| Cabot Risk Strategies, LLC | US | — | 1 |
| Cabrillo College | US | — | 2 |
| Cabrillo Community College District | US | — | 1 |
| Cache Valley Ear Nose & Throat | US | Healthcare | 2 |
| CACN Holdings, LLC | US | — | 1 |
| Cadence Aerospace | US | — | 2 |
| Cadence Bank | US | — | 2 |
| Cadence Innovations Group | US | — | 1 |
| Cadwalader, Wickersham & Taft | US | — | 3 |
| Caesars Entertainment, Inc. | US | Hospitality | 4 |
| CafePress | US | — | 1 |
| CafePress, Inc. | US | — | 2 |
| CAH Holdings, Inc. | US | — | 1 |
| CAI Technologies | US | — | 1 |
| Caiafa & Company, LLC | US | — | 1 |
| Cain Vineyard and Winery | US | — | 1 |
| CAIRE Inc. | US | — | 1 |
| CalAmp Corp | US | — | 1 |
| Calcium Products, Inc. | US | — | 1 |
| Caldwell Sutter Capital, Inc. | US | — | 2 |
| Caldwell Trust Company | US | — | 1 |
| Caleres, Inc. | US | Manufacturing | 2 |
| Cali Pet Nutrients LLC dba | US | — | 1 |
| Caliber Home Loans | US | — | 1 |
| Caliber Home Loans, Inc. | US | — | 1 |
| Calibrated Healthcare, LLC | US | — | 1 |
| Calibrated Healthcare, LLC, on behalf of its covered entity clients | US | — | 1 |
| Calibrated Healthcare, LLC, on behalf of its customers' health plans | US | — | 1 |
| Calibre CPA Group | US | — | 2 |
| Calif. Department of Health Care Services | US | — | 1 |
| California Cancer Associates for Research and Excellence - Fresno | US | — | 1 |
| California Cancer Associates for Research and Excellence - High Desert | US | — | 1 |
| California Cancer Associates for Research and Excellence - San Diego | US | — | 1 |
| California Casualty Indemnity Exchange | US | — | 1 |
| California College of the Arts | US | — | 1 |
| California Community Colleges Chancellor's Office (submitted c/o Pearson VUE) | US | — | 1 |
| California Correctional Health Care Services | US | — | 8 |
| California Correctional Health Care Services (CCHCS) | US | — | 1 |
| California Creative Solutions, Inc. | US | — | 1 |
| California Cryobank LLC | US | — | 2 |
| California Department of Business Oversight | US | — | 1 |
| California Department of Corrections and Rehabilitation | US | — | 9 |
| California Department of Corrections & Rehabilitation - California Correctional Health Care Services | US | — | 1 |
| California Department of Finance | US | — | 1 |
| California Department of Fish and Wildlife | US | — | 1 |
| California Department of Food and Agriculture | US | — | 2 |
| California Department of Healthcare Services | US | — | 1 |
| California Department of Justice | US | — | 1 |
| California Department of Justice / CATCH | US | — | 1 |
| California Department of Motor Vehicle (CA DMV) | US | — | 1 |
| California Department of Public Health | US | — | 4 |
| California Department of Social Services | US | — | 3 |
| California Department of State Hospitals | US | — | 1 |
| California Dialysis Management Services, Inc. | US | — | 1 |
| California FAIR Plan Association | US | — | 1 |
| California Family Foods | US | — | 1 |
| California Health & Wellness | US | — | 1 |
| California International Bank, N.A. | US | — | 2 |
| California Lutheran University | US | — | 1 |
| California Massage Therapy | US | — | 1 |
| California Massage Therapy Council | US | — | 1 |
| California Natural Products | US | — | 1 |
| California Northstate University | US | — | 1 |
| California Online Public Schools | US | — | 1 |
| California-Oregon Telecommunications Company | US | — | 1 |
| California Pacific Medical Center | US | — | 1 |
| California Pet Partners, LLC dba | US | — | 1 |
| California Physicians' Service d/b/a Blue Shield of California | US | — | 3 |
| California Physicians' Services | US | — | 2 |
| California Physicians' Services d/b/a Blue Shield of California | US | — | 3 |
| California Pizza Kitchen | US | — | 2 |
| California Skin Products, LLC dba | US | — | 1 |
| California State Teachers' Retirement System | US | — | 1 |
| California State University East Bay | US | — | 2 |
| California State University, Fresno | US | — | 1 |
| California State University Northridge | US | — | 1 |
| California Statewide Automated Welfare System | US | — | 1 |
| California Student Aid Commission | US | — | 1 |
| California Virtual Academies | US | — | 1 |
| California Western School of Law | US | — | 1 |
| Calista Corporation | US | — | 1 |
| Call 4 Health, Inc. | US | — | 1 |
| Call-on-Doc | US | — | 1 |
| CallonDoc, Inc. | US | — | 1 |
| CalOptima | US | — | 2 |
| CalPERS | US | — | 1 |
| Calpine Corporation | US | — | 1 |
| Calspan Holdings, LLC | US | — | 1 |
| Calton & Associates | US | — | 1 |
| Calton & Associates, Inc. | US | — | 1 |
| Caltrol Inc. | US | — | 2 |
| Calvary Design Team, Inc. | US | — | 1 |
| Calvin Schuster, M.D. | US | — | 1 |
| CalViva Health | US | — | 1 |
| Cambrex Corporation | US | — | 1 |
| Cambridge Advisors | US | — | 1 |
| Cambridge College | US | — | 2 |
| Cambridge Mercantile Corp. (U.S.A.) | US | — | 1 |
| Cambridge Public Schools | US | — | 2 |
| Cambridge Savings Bank | US | — | 7 |
| Cambridge School of Weston | US | — | 1 |
| Cambridge Trust Company | US | — | 10 |
| Cambridge University Press & Assessment | US | — | 1 |
| Cambro | US | — | 1 |
| Cambro Manufacturing | US | — | 1 |
| Camden National Bank | US | — | 1 |
| Camden-on-Gauley Medical Center | US | Healthcare | 1 |
| Cameron & Mittleman LLP | US | — | 2 |
| CAMICO Mutual Insurance Company | US | — | 1 |
| Camino Nuevo Charter Academy | US | — | 2 |
| Camp Harbor View | US | — | 1 |
| Campari Group | US | — | 1 |
| Campbell Conroy & O¶Neil | US | — | 1 |
| Campbell Killin Brittan & Ray LLC | US | — | 1 |
| Campbell Lutyens & Co. Inc. | US | — | 1 |
| Campbell Taylor & Company | US | — | 1 |
| Campbell Union High School District | US | — | 1 |
| Campbell University | US | Healthcare | 1 |
| Camping World / Good Sam | US | — | 1 |
| Camping World / Good Sam (CWGS) | US | — | 1 |
| Campus CE Corporation | US | — | 1 |
| Camrosa Water District | US | — | 2 |
| Can Lines Engineering, Inc. | US | — | 1 |
| Canary Benefits, Inc. | US | — | 1 |
| Canatal Steel USA inc. | US | — | 1 |
| Canby Clinic | US | Healthcare | 1 |
| Canby School District | US | — | 1 |
| Cancer Research Institute | US | — | 1 |
| Cancer Treatment Centers of | US | — | 1 |
| Cancer Treatment Centers of America | US | — | 1 |
| Cancer Treatment Centers of America at Midwestern Regional Medical Center | US | — | 1 |
| Cancer Treatment Centers of America at Western Regional Medical Center | US | — | 1 |
| Canfor Southern Pine, Inc. | US | — | 1 |
| Cannabis Control Commission | US | — | 2 |
| Canon U.S.A., Inc. | US | — | 2 |
| Canonical USA, Inc. | US | — | 1 |
| Cantella & Co, Inc. | US | — | 2 |
| Canterbury School | US | — | 1 |
| Cantex, Inc. | US | — | 2 |
| Cantey Hanger LLP | US | — | 1 |
| Canto, Rausch, Deck & Co., P.A. | US | — | 1 |
| Canton Public Schools | US | — | 1 |
| Canvas Solutions | US | — | 1 |
| Canyon Bakehouse, LLC | US | — | 2 |
| Capacity LLC | US | — | 1 |
| Capcom U.S.A, Inc. | US | — | 2 |
| Cape Ann Savings Bank | US | — | 1 |
| Cape & Coast Bank | US | — | 1 |
| Cape Cod 5 | US | — | 2 |
| Cape Cod Academy | US | — | 1 |
| Cape Cod Five | US | — | 21 |
| Cape Cod Five Cent Savings Bank | US | — | 1 |
| Cape Cod Five Cents Savings | US | — | 1 |
| Cape Cod Healthcare | US | — | 1 |
| Cape Cod Hospital | US | — | 2 |
| Cape Code Five | US | — | 1 |
| Cape Electrical Supply LLC | US | — | 1 |
| Cape Fear Aesthetics | US | — | 1 |
| Cape Fear Country Club | US | — | 1 |
| CapFinancial Partners, LLC | US | — | 1 |
| Capistrano Unified School District | US | — | 1 |
| Capita plc and Capita Pension Solutions Ltd | GB | — | 1 |
| Capital Accounting & Tax | US | — | 1 |