| Banco Popular de Puerto Rico | US | — | 1 |
| Banco Popular de Puerto Rico (BPPR) | US | — | 1 |
| Banfi Products Corporation | US | — | 1 |
| Banfield Pet Hospital | US | — | 1 |
| Bangkok Bank PCL - New York | US | — | 1 |
| Bank 34 | US | — | 1 |
| Bank-Fund Staff Federal Credit | US | — | 1 |
| Bank of America | US | — | 88 |
| Bank of America Merchant Services, LLC | US | — | 1 |
| Bank of America Merril Lynch | US | — | 1 |
| Bank of America, N.A. | US | — | 2 |
| Bank of America, N.A. concerning breach at NCB Manag. Serv. | US | — | 1 |
| Bank of America, N.A. / NCB Management Services, Inc. | US | — | 1 |
| Bank of Canton | US | — | 2 |
| Bank of Clarke | US | — | 1 |
| Bank of Colorado | US | — | 1 |
| Bank of Eastern Oregon | US | — | 1 |
| Bank of Hope | US | — | 1 |
| Bank of Labor | US | — | 1 |
| Bank of Little Rock | US | — | 1 |
| Bank of Manhattan—Mortgage Lending | US | — | 1 |
| Bank of New England | US | — | 1 |
| Bank of Nova Scotia | US | Finance | 1 |
| Bank of Oak Ridge | US | — | 1 |
| Bank of the West | US | — | 8 |
| Bank OZK | US | Finance | 1 |
| Bank3 | US | — | 2 |
| BankCard USA Merchant Services Inc. | US | — | 2 |
| Banker Lopez Gassler, P.A. | US | — | 1 |
| Bankers Cooperative Group | US | — | 1 |
| Bankers Healthcare Group, LLC | US | — | 1 |
| Bankers Life and Casualty | US | — | 2 |
| Bankers Life and Casualty Company | US | — | 3 |
| Bankers Life (BL) - BL is the marketing brand of Bankers Life and Casualty Co., Medicare Supplement insurance policies sold by Colonial Penn Life Insurance Co. and select policies sold in NY by Bankers Conseco Life Insurance Company, a NY licensed ins. co | US | — | 1 |
| Bankers Standard Insurance | US | — | 1 |
| BankFlorida | US | — | 1 |
| BankGloucester | US | — | 2 |
| BankNewport | US | — | 1 |
| BankProv | US | — | 1 |
| Banner Health | US | — | 1 |
| Banner Life | US | — | 2 |
| Bansley and Kiener, L.L.P. | US | — | 2 |
| Baptist Hospitals of Southeast Texas | US | Healthcare | 1 |
| Baptist Medical Center | US | — | 1 |
| BAR Architects & Interiors | US | — | 1 |
| Baraga County Memorial Hospital | US | Healthcare | 1 |
| Barbara Bush Foundation | US | — | 1 |
| Barbara Treadwell LLC | US | — | 1 |
| Barbecue Renew Inc. | US | — | 1 |
| Barbizon Electric Co., Inc. dba | US | — | 1 |
| Barclays | US | Finance | 1 |
| Barclays Bank Delaware | US | — | 2 |
| Bard Associates, Inc. | US | — | 1 |
| Barhite & Holzinger, Inc. | US | — | 1 |
| Barings, LLC | US | — | 2 |
| Barksdale & Associates, Inc. | US | — | 1 |
| Barlow Respiratory Hospital | US | — | 2 |
| Barnes & Noble Booksellers, Inc. | US | — | 1 |
| Barnes & Noble Education, Inc. | US | Retail | 1 |
| Barnes & Thornburg LLP | US | — | 1 |
| Barnhart Crane & Rigging Company, Inc. | US | — | 1 |
| Barnhart Group, Inc. | US | — | 1 |
| Barnhill Contracting Company | US | — | 1 |
| Barnstable County Sheriff's Office | US | — | 1 |
| Barr & Barr | US | — | 1 |
| Barran Liebman LLP | US | — | 1 |
| Barrantys LLC | US | — | 1 |
| Barrett-Jackson Holdings, LLC | US | — | 1 |
| Barrio Comprehensive Family Health Care Center | US | Healthcare | 2 |
| BarristerBooks, Inc. | US | — | 2 |
| Barron Area School District | US | — | 1 |
| Barry J. Kay & Co., CPAs | US | — | 1 |
| Barry University | US | — | 1 |
| Barry Wehmiller | US | — | 1 |
| Barsh and Cohen, P.C. | US | — | 1 |
| Bartell Hotels | US | — | 1 |
| Bartlett Dairy, Inc. | US | — | 1 |
| Bartlett, Pringle, and Wolf, LLP | US | — | 1 |
| Barton Gilman LLP | US | — | 1 |
| Barucci Consulting Services dba Padgett Advisors of Westwood | US | — | 1 |
| Basement Systems, Inc. | US | — | 1 |
| BASIS Educational Group, LLC | US | — | 1 |
| Baskervill & Son, P.C. d/b/a Baskervill | US | — | 1 |
| BASSETT FURNITURE INDUSTRIES INC | US | Manufacturing | 2 |
| Bassett Furniture Industries, Incorporated | US | — | 1 |
| Bastyr University | US | — | 1 |
| Batchelder Bros. Insurance | US | — | 1 |
| Bath & Body Works Direct, Inc. | US | — | 3 |
| Bath Fitter Distributing, Inc. | US | — | 2 |
| Batta Fulkerson Law Group | US | — | 1 |
| Battelle Energy Alliance, LLC | US | — | 1 |
| Bauer Built Tire & Service | US | — | 1 |
| Baum & Baum Certified Public Accountants, P.C. | US | — | 1 |
| Baum Sigman Auerbach & | US | — | 1 |
| Bausch Health Companies Inc. | US | Pharma | 1 |
| Bavaria Sausage Inc. | US | — | 1 |
| Baxter Credit Union | US | — | 1 |
| Baxter International, Inc. | US | Healthcare | 1 |
| Bay Alarm Medical LLC | US | — | 1 |
| Bay Area Air Quality Management District | US | — | 1 |
| Bay Area Anesthesia, LLC (“BAA”) | US | — | 1 |
| Bay Area Bioscience Association | US | — | 1 |
| Bay Area Children's Association | US | — | 1 |
| Bay Area Community Health | US | — | 1 |
| Bay Area Host Committee | US | — | 1 |
| Bay Area Pain Medical Associates | US | — | 1 |
| Bay & Bay Transportation | US | — | 1 |
| Bay Bridge Administrators, LLC | US | — | 1 |
| Bay Coast Bank | US | — | 1 |
| Bay Colony Associates, Inc. | US | — | 1 |
| Bay Cove Human Services | US | — | 5 |
| Bay Cove Human Services, Inc. | US | — | 2 |
| Bay Crest Partners, LLC | US | — | 1 |
| Bay Medical LLC | US | Healthcare | 1 |
| Bay Path University | US | — | 1 |
| Bay State Bank | US | — | 2 |
| Bay State Community Services, | US | — | 1 |
| Bay State Savins Bank | US | — | 1 |
| Bay Village of Sarasota | US | — | 1 |
| BAYADA Home Health Care | US | — | 1 |
| BAYADA Home Health Care, Inc. | US | Healthcare | 5 |
| Bayer Corporation | US | — | 1 |
| Bayer Corporation (The Lash Group, LLC) | US | — | 1 |
| Bayer Heritage Federal Credit Union | US | — | 1 |
| BayFirst Financial Corp. | US | Finance | 1 |
| BAYHEALTH | US | — | 1 |
| Bayhealth Medical Center | US | — | 2 |
| Bayley Construction | US | — | 1 |
| Baylor Genetics | US | — | 4 |
| Baylor Scott & White Texas Spine & Joint Hospital | US | Healthcare | 1 |
| BayMark Health Services, Inc. | US | — | 2 |
| Bayonet Plumbing, Heating & Air | US | — | 1 |
| Bayonne Board of Education | US | — | 1 |
| Bayou Homecare, LP | US | — | 1 |
| Bayou Media Development, LLC | US | — | 2 |
| BayPath Elder Services Inc | US | — | 2 |
| Bayside Covenant Church, Inc. | US | — | 1 |
| Bayside Dental | US | Healthcare | 2 |
| Bayside Interiors, Inc. | US | — | 1 |
| Baystate Franklin Medical Center | US | — | 1 |
| Baystate Health Noble Hospital | US | — | 1 |
| Baystate Medical Center | US | — | 7 |
| Baystate Medical Practices | US | — | 1 |
| Baystate Noble Hospital | US | — | 1 |
| Baywood Medical Associates, | US | — | 1 |
| BBC International LLC | US | — | 2 |
| BBRG Dedham TR, LLC | US | — | 1 |
| BBRG Newbury TR, LLC | US | — | 1 |
| BBRG TR, LLC | US | — | 1 |
| BBRG Waterfront TR, LLC | US | — | 1 |
| BBRG Woburn TR, LLC | US | — | 1 |
| BBS Financial Services, LLC | US | — | 2 |
| BBX Capital Corporation | US | — | 1 |
| BC International Group, Inc. | US | — | 1 |
| BCA Watson Rice, LLP | US | — | 1 |
| BCD Travel USA LCC | US | — | 1 |
| BCGL LLC | US | — | 2 |
| BCM One, Inc. | US | — | 1 |
| BCP Boston Manager, LLC | US | — | 1 |
| BCP Securities, LLC | US | — | 1 |
| BCycle, LLC | US | — | 1 |
| BDG Law Group | US | — | 1 |
| BDMPA LLC dba Austin Associates | US | — | 1 |
| Beach Properties | US | — | 1 |
| Beachbody, LLC | US | — | 1 |
| Beacon Communities LLC | US | — | 1 |
| Beacon Health System | US | — | 1 |
| Beacon Hospice, L.L.C. | US | — | 1 |
| Beacon Insurance Services | US | — | 1 |
| Beacon Pointe Advisors, LLC | US | — | 1 |
| Beacon Sales Acquisition, Inc. | US | — | 1 |
| Beam Therapeutics Inc. | US | Pharma | 1 |
| BearTooth Mapping, Inc. | US | — | 1 |
| Beatitudes Campus | US | — | 1 |
| Beaumont Health | US | — | 1 |
| Beaumont Health Foundation | US | — | 1 |
| Beausoleil Gardens, LLC | US | — | 1 |
| Beauty Essence, Inc. | US | — | 1 |
| Beauty Plus Trading Co. Inc | US | — | 1 |
| Beaver County Behavioral Health | US | Healthcare | 1 |
| bebe stores, inc. | US | — | 2 |
| BECU | US | — | 2 |
| Bed Bath & Beyond | US | — | 1 |
| Bed Bath & Beyond Inc. | US | — | 5 |
| Bee, Bergvall & Co | US | — | 1 |
| Beebe Medical Center | US | — | 1 |
| Beech Acres Parenting Center | US | Healthcare | 2 |
| Beer Capitol Distributing | US | — | 1 |
| Beer Industry Benefit Funds | US | — | 1 |
| Beermann LLP | US | — | 1 |
| behalf of Boston University Law | US | — | 1 |
| behalf of the impacted data owners | US | — | 1 |
| Behavior Assist, Inc. | US | — | 1 |
| Behavioral Health Network | US | — | 1 |
| Behavioral Health Network Inc | US | — | 2 |
| Behavioral Health Partners of | US | — | 1 |
| Behavioral Health Resources | US | Healthcare | 2 |
| Behavorial Health Network Inc. | US | — | 2 |
| Bel-Air Bay Club Ltd | US | — | 2 |
| Bel USA LLC | US | — | 2 |