506 data breaches in 2015
Every known breach that happened in 2015, biggest first: how many people it hit (or Washington residents, for Washington notices), what was exposed, and where it was reported. A state notice with no breach date is listed under the year it was reported.
Monthly statistics (counts, trends, what leaked): Serus Data Breach Report
| Breach | Date | Affected | Source |
|---|---|---|---|
 NetEase | Oct 2015 | 234.8M WA residents | View breach |
 Anthem | Feb 2015 | 78.8M WA residents | 2 sources ▾ |
| VNG | May 2015 | 24.9M WA residents | HIBP |
 R2Games | Nov 2015 | 22.3M WA residents | View breach |
| ClearVoice Surveys | Aug 2015 | 15.1M WA residents | View breach |
 000webhost | Mar 2015 | 14.9M WA residents | View breach |
| Premera Blue Cross | Mar 2015 | 11M WA residents | HHS |
| Excellus Health Plan | Sept 2015 | 9.4M WA residents | HHS |
 Experian (2015) | Sept 2015 | 7.2M WA residents | View breach |
| xat | Nov 2015 | 6M WA residents | HIBP |
| QuinStreet | Dec 2015 | 4.9M WA residents | HIBP |
| University of California, Los Angeles Health | Jul 2015 | 4.5M WA residents | HHS |
| Gaadi | May 2015 | 4.3M WA residents | HIBP |
| Trillian | Dec 2015 | 3.8M WA residents | HIBP |
| Medical Informatics Engineering | Jul 2015 | 3.5M WA residents | HHS |
| Спрашивай.ру | May 2015 | 3.5M WA residents | HIBP |
| InterPals | Nov 2015 | 3.4M WA residents | HIBP |
| Go Games | Oct 2015 | 3.4M WA residents | HIBP |
| MPGH | Oct 2015 | 3.1M WA residents | HIBP |
| iPmart | Jul 2015 | 2.5M WA residents | HIBP |
 Patreon | Oct 2015 | 2.3M WA residents | View breach |
| 21st Century Oncology | Oct 2015 | 2.2M WA residents | 3 sources ▾ |
| GameTuts | Mar 2015 | 2.1M WA residents | HIBP |
| Nihonomaru | Dec 2015 | 1.7M WA residents | HIBP |
 Aternos | Dec 2015 | 1.4M WA residents | View breach |
| Snail | Mar 2015 | 1.4M WA residents | HIBP |
| Xbox 360 ISO | Sept 2015 | 1.3M WA residents | HIBP |
| PSP ISO | Sept 2015 | 1.3M WA residents | HIBP |
| Gamerzplanet | Oct 2015 | 1.2M WA residents | HIBP |
 DaniWeb | Dec 2015 | 1.1M WA residents | View breach |
| StoryBird | Aug 2015 | 1M WA residents | HIBP |
| MyFHA | Feb 2015 | 972.6K WA residents | View breach |
| Abandonia (2015) | Nov 2015 | 776.1K WA residents | HIBP |
| WildStar | Jul 2015 | 738.6K WA residents | HIBP |
| Programming Forums | Dec 2015 | 707.4K WA residents | HIBP |
| Virginia Department of Medical Assistance Services | Mar 2015 | 697.6K WA residents | HHS |
| Pokébip | Jul 2015 | 657K WA residents | HIBP |
| Final Fantasy Shrine | Sept 2015 | 620.7K WA residents | HIBP |
 Comcast | Nov 2015 | 616.9K WA residents | View breach |
 Atrium Health | Jan 2015 | 586K WA residents | View breach |
| Georgia Department of Community Health | Mar 2015 | 557.8K WA residents | HHS |
| vBulletin | Nov 2015 | 519K WA residents | HIBP |
| Kimsufi | May 2015 | 504.6K WA residents | HIBP |
| Bitcoin Talk | May 2015 | 501.4K WA residents | HIBP |
| WIIU ISO | Sept 2015 | 458.2K WA residents | HIBP |
 OVH | May 2015 | 452.9K WA residents | View breach |
| PS3Hax | Jul 2015 | 447.4K WA residents | HIBP |
| CheapAssGamer.com | Jul 2015 | 444.8K WA residents | HIBP |
| Evermotion | May 2015 | 435.5K WA residents | HIBP |
| Xbox-Scene | Feb 2015 | 432.6K WA residents | HIBP |
| PSX-Scene | Feb 2015 | 341.1K WA residents | HIBP |
 Plex | Jul 2015 | 327.3K WA residents | View breach |
 Ancestry | Nov 2015 | 297.8K WA residents | View breach |
| Seedpeer | Jul 2015 | 281.9K WA residents | HIBP |
| MajorGeeks | Nov 2015 | 269.5K WA residents | HIBP |
| SweClockers.com | Apr 2015 | 254.9K WA residents | HIBP |
| myRepoSpace | Jul 2015 | 252.8K WA residents | HIBP |
| Minefield | Jun 2015 | 188.3K WA residents | HIBP |
| PHP Freaks | Oct 2015 | 173.9K WA residents | HIBP |
| Empi | Aug 2015 | 160K WA residents | HHS |
| Advantage Consolidated | Feb 2015 | 151.6K WA residents | 2 sources ▾ |
| Bleach Anime Forum | Jan 2015 | 143.7K WA residents | HIBP |
| StarNet | Feb 2015 | 139.4K WA residents | HIBP |
| Soundwave | Jul 2015 | 130.7K WA residents | HIBP |
| Scuf Gaming | Jun 2015 | 128.7K WA residents | HIBP |
| Telecom Regulatory Authority of India | Apr 2015 | 107.8K WA residents | HIBP |
| Mac-Torrents | Oct 2015 | 94K WA residents | HIBP |
| Jacobi Medical Center | Apr 2015 | 90.1K WA residents | HHS |
| Qatar National Bank | Jul 2015 | 88.7K WA residents | HIBP |
| OH Muhlenberg | Nov 2015 | 84.7K WA residents | HHS |
| City of Philadelphia Fire Department Emergency Medical Services Unit | Apr 2015 | 81.5K WA residents | HHS |
| Tennessee Rural Health Improvement Association | Jan 2015 | 79K WA residents | HHS |
| North East Medical Services | Jul 2015 | 69.2K WA residents | 2 sources ▾ |
| St.Vincent Hospital and Health Care Center | Feb 2015 | 63.3K WA residents | HHS |
| Boston Baskin Cancer Foundation | Feb 2015 | 56.7K WA residents | HHS |
| Molina Healthcare | Sept 2015 | 54.2K WA residents | HHS |
| Lancaster County EMS | Jun 2015 | 50K WA residents | HHS |
| AT&T Group Health Plan | Mar 2015 | 50K WA residents | HHS |
| Hemmakväll | Jul 2015 | 47.3K WA residents | HIBP |
| Aspire Indiana | Jan 2015 | 43.9K WA residents | HHS |
| Freelancers Insurance | Mar 2015 | 43.1K WA residents | HHS |
| Flashback | Feb 2015 | 40.3K WA residents | HIBP |
| Seton Family of Hospitals | Apr 2015 | 39K WA residents | HHS |
| Indiana State Medical Association | Mar 2015 | 38.4K WA residents | HHS |
| Keenan & Associates | Oct 2015 | 35.4K WA residents | 2 sources ▾ |
| Hacking Team | Jul 2015 | 32.3K WA residents | HIBP |
| SvenskaMagic | Jul 2015 | 30.3K WA residents | HIBP |
| St. Luke's Cornwall Hospital | Dec 2015 | 29.2K WA residents | HHS |
| Saint Agnes Health Care | Apr 2015 | 25K WA residents | HHS |
| Blue Shield of California | Sept 2015 | 20.8K WA residents | 2 sources ▾ |
| Medical Management | May 2015 | 20.5K WA residents | HHS |
| MyVidster (2015) | Aug 2015 | 19.9K WA residents | HIBP |
| South Sunflower County Hospital | Feb 2015 | 19K WA residents | HHS |
| Global Care Delivery | Jun 2015 | 18.2K WA residents | HHS |
| Children's National Medical Center | Feb 2015 | 18K WA residents | HHS |
| Oakland Family Services | Sept 2015 | 16.1K WA residents | HHS |
| Minecraft Pocket Edition Forum | May 2015 | 16K WA residents | HIBP |
| Children's Medical Clinics of East Texas | Oct 2015 | 16K WA residents | HHS |
| Mary Ruth Buchness, MD, Dermatologist | Dec 2015 | 14.9K WA residents | HHS |
| Louisiana State University Health Sciences Center-New Orleans | Sept 2015 | 14.5K WA residents | HHS |
| Sacred Heart Health System | Mar 2015 | 14.2K WA residents | HHS |
| UMass Memorial Medical | Jan 2015 | 14.1K WA residents | HHS |
| Oregon's Health CO-OP | Jun 2015 | 14K WA residents | HHS |
| Lizard Squad | Jan 2015 | 13.5K WA residents | HIBP |
| Pediatric Gastroenterology, Hepatology & Nutrition of Florida, P.A | Aug 2015 | 13K WA residents | HHS |
| Siouxland Anesthesiology | Jul 2015 | 13K WA residents | HHS |
| CVS Health | Jun 2015 | 12.9K WA residents | HHS |
| The McLean Hospital | Jul 2015 | 12.7K WA residents | HHS |
| Montefiore Medical Center | Jul 2015 | 12.5K WA residents | HHS |
| Concordia Plan Services | Apr 2015 | 12.5K WA residents | HHS |
| Implants, Dentures & Dental | Jun 2015 | 12K WA residents | HHS |
| Emergence Health Network | Oct 2015 | 11.1K WA residents | HHS |
| Cottage Health | Oct 2015 | 11K WA residents | 2 sources ▾ |
| SUPERVALU Group Health Plan | Apr 2015 | 10.9K WA residents | HHS |
| Pediatric | Aug 2015 | 10K WA residents | HHS |
| National Seating & Mobility | Jun 2015 | 9.6K WA residents | HHS |
| University of Oklahoma Department of Urology | Oct 2015 | 9.3K WA residents | HHS |
| orlantino dyoco, M.D | Jun 2015 | 9K WA residents | 2 sources ▾ |
| Pittman Family Dental | Dec 2015 | 8.8K WA residents | HHS |
| Children's Heart Center | Apr 2015 | 8.8K WA residents | HHS |
| Florida Hospital | Mar 2015 | 8.7K WA residents | HHS |
| Marketing Clique | Feb 2015 | 8.7K WA residents | HHS |
| Walgreen | May 2015 | 8.3K WA residents | HHS |
| Thomas H. Boyd Memorial Hospital | May 2015 | 8.3K WA residents | HHS |
| Centene Management | Oct 2015 | 8.2K WA residents | HHS |
| Project Vida Health Center | Mar 2015 | 7.7K WA residents | HHS |
| University of Oklahoma, Department of Obstetrics and Gynecology | Jul 2015 | 7.7K WA residents | HHS |
| FireKeepers Casino Hotel | Jul 2015 | 7.7K WA residents | HHS |
| Children's Hospital Medical Center of Akron | Aug 2015 | 7.7K WA residents | HHS |
| Integral Health Plan | Jul 2015 | 7.5K WA residents | HHS |
| Dr. Anthony T. R. Green DDS | Mar 2015 | 7.4K WA residents | HHS |
| Western Montana Clinic | Apr 2015 | 7K WA residents | HHS |
| VA Corporate Data Center Operations/Austin Information Technology Center | Jan 2015 | 7K WA residents | HHS |
| Amedisys | Mar 2015 | 6.9K WA residents | HHS |
| Fred Finch Youth Center | Jun 2015 | 6.9K WA residents | HHS |
| The Department of Aging and Disability Services | Jun 2015 | 6.6K WA residents | HHS |
| Baptist Health and Arkansas Health | Oct 2015 | 6.5K WA residents | HHS |
| Urology Associates, Professional | Jul 2015 | 6.5K WA residents | HHS |
| Allina Health | Apr 2015 | 6.2K WA residents | HHS |
| Aflac | May 2015 | 6.2K WA residents | HHS |
| International Union of Operating Engineers Local Unions 181, 320 & TVA Health and Welfare Trust Fund | Apr 2015 | 5.4K WA residents | HHS |
| Healthfirst Affiliates that include Healthfirst PHSP | Jul 2015 | 5.3K WA residents | HHS |
| Northwest Primary Care | Dec 2015 | 5.3K WA residents | HHS |
| St. Peter's Health Partners | Jan 2015 | 5.1K WA residents | HHS |
| Planned Parenthood Southwest Ohio | Feb 2015 | 5K WA residents | HHS |
| Rainier Surgical | Jan 2015 | 4.9K WA residents | HHS |
| Consolidated Tribal Health Project | Apr 2015 | 4.9K WA residents | 2 sources ▾ |
| Associated Dentists-Roseville Office | May 2015 | 4.7K WA residents | HHS |
| Clinical Reference Laboratory | Mar 2015 | 4.7K WA residents | HHS |
| Indian Territory Home Health and Hospice | Oct 2015 | 4.5K WA residents | HHS |
| Huntington Medical Research Institutes | Oct 2015 | 4.3K WA residents | HHS |
| Aspire Home Care and Hospice | Oct 2015 | 4.3K WA residents | HHS |
| Central Brooklyn Medical | Jun 2015 | 4.2K WA residents | HHS |
| EyeCare of Bartlesville | Mar 2015 | 4K WA residents | HHS |
| Saint Louis County Department of Health | Jan 2015 | 4K WA residents | HHS |
| New York City Health and Hospitals | Jun 2015 | 4K WA residents | HHS |
| St. Mary's Health | Mar 2015 | 4K WA residents | HHS |
| Blue Cross Blue Shield of Michigan | Mar 2015 | 3.9K WA residents | HHS |
| Midlands Orthopaedics, P.A | Nov 2015 | 3.9K WA residents | HHS |
| Heartland Health Clinic | Sept 2015 | 3.7K WA residents | HHS |
| Orlando Health | Jul 2015 | 3.4K WA residents | HHS |
| University of Rochester Medical Center | May 2015 | 3.4K WA residents | HHS |
| Bellevue Hospital Center | Apr 2015 | 3.3K WA residents | HHS |
| Partners HealthCare System | May 2015 | 3.3K WA residents | HHS |
| Skin and Cancer Center of Arizona | Sept 2015 | 3.3K WA residents | HHS |
| Cathrine Steinborn DDS | Jan 2015 | 3.2K WA residents | 2 sources ▾ |
| ADT | Apr 2015 | 3.1K WA residents | HHS |
| St. Martin Parish School Based Health Centers | Jun 2015 | 3K WA residents | HHS |
| University of Illinois at Chicago | Apr 2015 | 3K WA residents | HHS |
| Hunt Regional Medical Partners | Feb 2015 | 3K WA residents | HHS |
| Suburban Lung Associates | Apr 2015 | 3K WA residents | HHS |
| Georgia Department of Human Services | Jul 2015 | 3K WA residents | HHS |
| Centegra Health System | Dec 2015 | 2.9K WA residents | HHS |
| Insurance Data Services | Oct 2015 | 2.9K WA residents | HHS |
| Robert D. Chatlos DMD & Assoc | Oct 2015 | 2.9K WA residents | HHS |
| CarePlus Health Plans | Oct 2015 | 2.9K WA residents | HHS |
| Heartland Dental | Jun 2015 | 2.9K WA residents | HHS |
| Humana | Sept 2015 | 2.8K WA residents | HHS |
| Courier | Feb 2015 | 2.8K WA residents | HHS |
| Senior Health Partners | Feb 2015 | 2.8K WA residents | HHS |
| Career Education | Mar 2015 | 2.7K WA residents | HHS |
| United Seating and Mobility | Jun 2015 | 2.7K WA residents | HHS |
| CompuNet Clinical Laboratories | Apr 2015 | 2.6K WA residents | HHS |
| San Franciso General Hospital and Trauma Center | Mar 2015 | 2.5K WA residents | HHS |
| Life Care Center of Attleboro | Mar 2015 | 2.5K WA residents | HHS |
| Henry Ford Health System | Jan 2015 | 2.3K WA residents | HHS |
| Good Care Pediatric | Nov 2015 | 2.3K WA residents | HHS |
| UPMC | May 2015 | 2.3K WA residents | HHS |
| Anne Arundel Health System | Oct 2015 | 2.2K WA residents | HHS |
| Mosaic Medical | Mar 2015 | 2.2K WA residents | HHS |
| Raymond Mark Turner, M.D | Feb 2015 | 2.2K WA residents | HHS |
| Kaiser Foundation Hospitals, Northern California | Jan 2015 | 2.1K WA residents | 2 sources ▾ |
| Sunquest Information Systems | Sept 2015 | 2.1K WA residents | HHS |
| Daniel A. Sheldon, M.D., P.A | Sept 2015 | 2.1K WA residents | HHS |
| Lawrence General Hospital | Aug 2015 | 2.1K WA residents | HHS |
| T.J. Samson Community Hospital | Aug 2015 | 2.1K WA residents | HHS |
| ROBERT SOPER, M.D | Jun 2015 | 2K WA residents | 2 sources ▾ |
| Max M Bayard MD | Aug 2015 | 2K WA residents | HHS |
| Community Mercy Health Partners | Apr 2015 | 2K WA residents | HHS |
| David E. Hansen DDS PS | Jan 2015 | 2K WA residents | HHS |
| Bon Secours Saint Francis | Oct 2015 | 2K WA residents | HHS |
| Blue Cross and Blue Shield of Nebraska | Dec 2015 | 1.9K WA residents | HHS |
| mdINR | Jan 2015 | 1.9K WA residents | HHS |
| American Sleep Medicine | Apr 2015 | 1.8K WA residents | 2 sources ▾ |
| Wellmont Health System | Apr 2015 | 1.7K WA residents | HHS |
| Physicians Health Plan of Northern Indiana | Dec 2015 | 1.7K WA residents | HHS |
| 7-Eleven | Mar 2015 | 1.7K WA residents | HHS |
| LTC Dental | Oct 2015 | 1.7K WA residents | HHS |
| Prima CARE | Jul 2015 | 1.7K WA residents | HHS |
| Colorado Department of Health Care Policy and Financing | Aug 2015 | 1.6K WA residents | HHS |
| North Carolina Department of Health and Human Services | Oct 2015 | 1.6K WA residents | HHS |
| Ronald D. Garrett-Roe, MD | Jan 2015 | 1.6K WA residents | HHS |
| Woodhull Medical and Mental Health Center | Oct 2015 | 1.6K WA residents | HHS |
| Duke LifePoint Conemaugh Memorial Medical Center | May 2015 | 1.6K WA residents | HHS |
| Blue Cross Blue Shield of North Carolina | Sept 2015 | 1.5K WA residents | HHS |
| Rush University Medical Center | Nov 2015 | 1.5K WA residents | HHS |
| Lee Memorial Health System | Sept 2015 | 1.5K WA residents | HHS |
| Carolyn B Lyde, MD, PA | Nov 2015 | 1.5K WA residents | HHS |
| PT Northwest | Aug 2015 | 1.5K WA residents | HHS |
| East Bay Perinatal Medical Associates | Jun 2015 | 1.5K WA residents | 2 sources ▾ |
| Special Agents Mutual Benefit Association | Jul 2015 | 1.5K WA residents | HHS |
| Triple S Advantage | Mar 2015 | 1.5K WA residents | HHS |
| Minneapolis Clinic of Neurology | Aug 2015 | 1.5K WA residents | HHS |
| Jersey City Medical Center | Apr 2015 | 1.4K WA residents | HHS |
| Howard University | Jul 2015 | 1.4K WA residents | HHS |
| Cancer Care Northwest | Aug 2015 | 1.4K WA residents | HHS |
| PeaceHealth | Nov 2015 | 1.4K WA residents | HHS |
| Mount Sinai Medical Center | Mar 2015 | 1.4K WA residents | HHS |
| Endocrinology Associates | Aug 2015 | 1.4K WA residents | HHS |
| HealthSouth Rehabilitation Hospital of Round Rock | Dec 2015 | 1.4K WA residents | HHS |
| Sharon J. Jones, M.D | Mar 2015 | 1.3K WA residents | 2 sources ▾ |
| Ventura County Health Care Agency | May 2015 | 1.3K WA residents | HHS |
| Michael Benjamin, M.D | Dec 2015 | 1.3K WA residents | HHS |
| HealthPoint | Nov 2015 | 1.3K WA residents | HHS |
| Diana S. Guth | Jan 2015 | 1.3K WA residents | HHS |
| New Dimension | Nov 2015 | 1.3K WA residents | HHS |
| Nephropathology Associates | Oct 2015 | 1.3K WA residents | HHS |
| Valley Community Healthcare | Feb 2015 | 1.2K WA residents | 2 sources ▾ |
| Lancaster Cardiology Medical Group, and Sunder Heart Institute and Vascular Medical Clinic | Aug 2015 | 1.2K WA residents | HHS |
| Horizon Healthcare Services | Sept 2015 | 1.2K WA residents | HHS |
| Stanislaus Surgical Hospital | Apr 2015 | 1.2K WA residents | 2 sources ▾ |
| VA Black Hills Health Care System | Aug 2015 | 1.2K WA residents | HHS |
| OsteoMed | Oct 2015 | 1.1K WA residents | HHS |
| Kindred Nursing Centers West | Sept 2015 | 1.1K WA residents | HHS |
| Sioux Falls VA Health Care System | Jul 2015 | 1.1K WA residents | HHS |
| UC Health | Nov 2015 | 1.1K WA residents | HHS |
| Sentara Healthcare | Oct 2015 | 1K WA residents | HHS |
| Children's Eyewear Sight | Jan 2015 | 1K WA residents | HHS |
| Meritus Medical Center | Jun 2015 | 1K WA residents | HHS |
| Barrington Orthopedic Specialists | Sept 2015 | 1K WA residents | HHS |
| OhioHealth | Jul 2015 | 1K WA residents | HHS |
| Baylor College of Medicine | Aug 2015 | 1K WA residents | HHS |
| Unity Recovery | May 2015 | 1K WA residents | HHS |
| Gallant Risk & Insurance Services | Apr 2015 | 995 WA residents | 2 sources ▾ |
| Pathways Professional Counseling | Nov 2015 | 986 WA residents | HHS |
| The MetroHealth System | May 2015 | 981 WA residents | HHS |
| WhiteGlove Health | Dec 2015 | 975 WA residents | HHS |
| Dean Health Plan | Nov 2015 | 960 WA residents | HHS |
| CDC/NIOSH World Trade Center Health Program | Apr 2015 | 958 WA residents | HHS |
| Haywood County NC | Feb 2015 | 955 WA residents | HHS |
| Middlesex Hospital | Dec 2015 | 946 WA residents | HHS |
| County of Los Angeles | Apr 2015 | 880 WA residents | 2 sources ▾ |
| CEMEX | Apr 2015 | 880 WA residents | HHS |
| McDermott Will & Emery LLP is the plan sponsor for the McDermott medical plan | Mar 2015 | 880 WA residents | HHS |
| Denton County Health Department | Apr 2015 | 874 WA residents | HHS |
| Elizabeth Kerner, M.D | Apr 2015 | 873 WA residents | HHS |
| Cigna-HealthSpring | Apr 2015 | 862 WA residents | HHS |
| Advanced Radiology Consultants | Jul 2015 | 855 WA residents | HHS |
| Belgrade Regional Health Center | Dec 2015 | 854 WA residents | HHS |
| University Hospitals | Jan 2015 | 848 WA residents | HHS |
| Merit Health Northwest Mississippi | Aug 2015 | 846 WA residents | HHS |
| Tulare County Health & Human Services Agency | Mar 2015 | 845 WA residents | 2 sources ▾ |
| California Physicians’ Service | May 2015 | 843 WA residents | 2 sources ▾ |
| BeHealthy Florida | Oct 2015 | 835 WA residents | HHS |
| University of Colorado Health | Dec 2015 | 827 WA residents | HHS |
| PIH Health Hospital | Apr 2015 | 826 WA residents | HHS |
| Camelback Women's Health | Dec 2015 | 810 WA residents | HHS |
| Metropolitan Atlanta Rapid Transit Authority | Aug 2015 | 800 WA residents | HHS |
| Health Plan sponsored by Covenant Ministries of Benevolance | Apr 2015 | 782 WA residents | HHS |
| St.Vincent Medical | Apr 2015 | 756 WA residents | HHS |
| Fidelis Care | Dec 2015 | 738 WA residents | HHS |
| UPMC Health Plan | Jul 2015 | 722 WA residents | HHS |
| Affinity Health Plan | Sept 2015 | 721 WA residents | HHS |
| Aventura Hospital and Medical Center | Feb 2015 | 686 WA residents | HHS |
| Tomas, Arturo | Feb 2015 | 680 WA residents | HHS |
| North Dallas Urogynecology | Jan 2015 | 678 WA residents | HHS |
| Oceans Acquisition | Dec 2015 | 659 WA residents | HHS |
| Community Health Network | Mar 2015 | 650 WA residents | HHS |
| Massachusetts General Hospital | Jul 2015 | 648 WA residents | HHS |
| SSM Health Cancer Care | Oct 2015 | 643 WA residents | HHS |
| Maricopa Special Health Care District | Jul 2015 | 633 WA residents | HHS |
| Alexian Brothers Medical Center | May 2015 | 632 WA residents | HHS |
| Kaiser Foundation Health Plan of the Mid-Atlantic States | Jan 2015 | 630 WA residents | HHS |
| Pediatric Associates | Mar 2015 | 627 WA residents | HHS |
| Amsterdam Nursing Home | Jul 2015 | 621 WA residents | HHS |
| Mayo Clinic Health System- Red Wing | Jul 2015 | 601 WA residents | HHS |
| Kane Hall Barry Neurology | Mar 2015 | 600 WA residents | HHS |
| Pathway to Hope | Feb 2015 | 600 WA residents | HHS |
| Cigna Home Delivery Pharmacy | Nov 2015 | 592 WA residents | HHS |
| The Johns Hopkins Hospital | Oct 2015 | 571 WA residents | HHS |
| Advance Rehabilitation & Consulting | Mar 2015 | 570 WA residents | HHS |
| BUFFALO HEART | May 2015 | 567 WA residents | HHS |
| New York State Office of Mental Health | Apr 2015 | 563 WA residents | HHS |
| New Mexico Department of Health | Dec 2015 | 561 WA residents | HHS |
| Arkansas Blue Cross and Blue Shield | Jul 2015 | 560 WA residents | HHS |
| Alaska Orthopedic Specialists | Nov 2015 | 553 WA residents | HHS |
| Schaeffler Group USA | Apr 2015 | 550 WA residents | HHS |
| EnvisionRx | Oct 2015 | 540 WA residents | HHS |
| ST Psychotherapy | Dec 2015 | 509 WA residents | HHS |
| Episcopal Health Services | Jun 2015 | 509 WA residents | HHS |
| VA Eastern Colorado Health Care System | Apr 2015 | 508 WA residents | HHS |
| Success 4 Kids & Families | May 2015 | 506 WA residents | HHS |
| Truman Medical Center | Jun 2015 | 503 WA residents | HHS |
| Health Care Service | Sept 2015 | 501 WA residents | HHS |
| Maine General Health | Dec 2015 | 500 WA residents | HHS |
| Florida Department of Health, Children's Medical Services | Oct 2015 | 500 WA residents | HHS |
| Keystone Pharmacy | Jun 2015 | 500 WA residents | HHS |
| Puerto Rico Department of Heatlh | Apr 2015 | 500 WA residents | HHS |
| New | Mar 2015 | 500 WA residents | HHS |
| National Pain Institute | Jan 2015 | 500 WA residents | HHS |
| T-Mobile USA/Experian | Sept 2015 | 328.9K WA residents | WA AG |
| ClearVoiceResearch.com | Sept 2015 | 21.6K WA residents | 2 sources ▾ |
| Gyft | Oct 2015 | 9K WA residents | 2 sources ▾ |
| HSBC Bank USA | Dec 2015 | 5.3K WA residents | WA AG |
| Digital Theatre | Apr 2015 | 3.2K WA residents | 2 sources ▾ |
| NLU Products | Apr 2015 | 2.5K WA residents | 2 sources ▾ |
| Matson Navigation | Nov 2015 | 2.2K WA residents | 2 sources ▾ |
| Choice Hotels International | Jun 2015 | 1.7K WA residents | 2 sources ▾ |
| Web.com | Aug 2015 | 1.6K WA residents | WA AG |
| SterlingBackcheck | May 2015 | 1.4K WA residents | 2 sources ▾ |
| Roberts Hawaii | Jul 2015 | 1.2K WA residents | 2 sources ▾ |
| Snohomish County PUD No. 1 | Jan 2015 | 1.1K WA residents | WA AG |
| Combat Brands | Jul 2015 | 956 WA residents | 2 sources ▾ |
| BackNine Insurance and Financial Services | Apr 2015 | 866 WA residents | 2 sources ▾ |
| Muji | Jan 2015 | 664 WA residents | WA AG |
| KontrolFreek | Oct 2015 | 625 WA residents | 2 sources ▾ |
| Springfield Armory | Oct 2015 | 512 WA residents | 2 sources ▾ |
| Sterbick & Associates, P.S | Aug 2015 | 500 WA residents | WA AG |
| Hyatt Hotels | Aug 2015 | 15 WA residents | 2 sources ▾ |
| Fairchild Medical Center | Dec 2015 | – WA residents | CA AG |
| Slack Technologies | Mar 2015 | – WA residents | CA AG |
| Rea.deeming Beauty | Apr 2015 | – WA residents | CA AG |
| Native Canada Footwear | Apr 2015 | – WA residents | CA AG |
| The Neiman Marcus | Dec 2015 | – WA residents | CA AG |
| Charles Komar & Sons | Mar 2015 | – WA residents | CA AG |
| The Madison Square Garden | Nov 2015 | – WA residents | 2 sources ▾ |
| County of Sacramento | Aug 2015 | – WA residents | CA AG |
| Dominican Hospital | Jul 2015 | – WA residents | CA AG |
| Schwan's Home Service | Oct 2015 | – WA residents | CA AG |
| HEI Hotels & Resorts | Mar 2015 | – WA residents | CA AG |
| CiCi Enterprises | Jun 2015 | – WA residents | 2 sources ▾ |
| Eastbay Equities | Dec 2015 | – WA residents | CA AG |
| Matador Recordings | Apr 2015 | – WA residents | CA AG |
| Omni Hotels & Resorts | Dec 2015 | – WA residents | CA AG |
| Amaash | Dec 2015 | – WA residents | CA AG |
| Cotti Foods California | Dec 2015 | – WA residents | CA AG |
| Dependable Foods | Dec 2015 | – WA residents | CA AG |
| Desmond Foods | Dec 2015 | – WA residents | CA AG |
| Gil Moore Oil | Dec 2015 | – WA residents | CA AG |
| Peninsula Foods | Dec 2015 | – WA residents | CA AG |
| Pirthipal Dhillon | Dec 2015 | – WA residents | CA AG |
| Wendy's of Fresno | Dec 2015 | – WA residents | CA AG |
| Wendy's | Dec 2015 | – WA residents | WA AG |
| Hard Rock Hotel & Casino Las Vegas | Oct 2015 | – WA residents | 2 sources ▾ |
| Acer Service | May 2015 | – WA residents | CA AG |
| Stonebridge Realty Advisors | Nov 2015 | – WA residents | CA AG |
| Bay Area Children's Association | Jan 2015 | – WA residents | CA AG |
| LuckyPet | Oct 2015 | – WA residents | CA AG |
| TN Marketing | Nov 2015 | – WA residents | CA AG |
| University of California, Berkeley | Dec 2015 | – WA residents | CA AG |
| Superior Labels | Nov 2015 | – WA residents | CA AG |
| Incipio | Sept 2015 | – WA residents | CA AG |
| Baja Bound Insurance Services | Dec 2015 | – WA residents | CA AG |
| University of Central Florida | Dec 2015 | – WA residents | CA AG |
| Neiman Marcus | Dec 2015 | – WA residents | CA AG |
| TaxSlayer | Oct 2015 | – WA residents | CA AG |
| County of San Diego | Dec 2015 | – WA residents | CA AG |
| California Virtual Academies | Dec 2015 | – WA residents | CA AG |
| HealthEquity | Dec 2015 | – WA residents | CA AG |
| RealSelf | Dec 2015 | – WA residents | CA AG |
| Kicky Pants | Aug 2015 | – WA residents | CA AG |
| HSBC Bank USA, National Association | Dec 2015 | – WA residents | CA AG |
| Blucora | Nov 2015 | – WA residents | CA AG |
| JB Autosports | Aug 2015 | – WA residents | CA AG |
| RateMyProfessors.com | Nov 2015 | – WA residents | CA AG |
| Washington Township Health Care District | Dec 2015 | – WA residents | CA AG |
| Acclaim Technical Services | Aug 2015 | – WA residents | CA AG |
| VTech Electronics North America | Nov 2015 | – WA residents | CA AG |
| CBC Restaurant | Dec 2015 | – WA residents | CA AG |
| Toyota Motor Credit | Aug 2015 | – WA residents | CA AG |
| Sorrento Pacific Financial | Dec 2015 | – WA residents | CA AG |
| TuneCore | Dec 2015 | – WA residents | CA AG |
| CM Ebar | Aug 2015 | – WA residents | CA AG |
| George Hills | Sept 2015 | – WA residents | CA AG |
| MUJI U.S.A | Dec 2015 | – WA residents | CA AG |
| Holly A Nordhues CPA | Dec 2015 | – WA residents | CA AG |
| Starwood Hotels & Resorts Worldwide | Nov 2015 | – WA residents | CA AG |
| W.W. Grainger | Nov 2015 | – WA residents | CA AG |
| B. Lane | May 2015 | – WA residents | CA AG |
| CSAC-EXCESS INSURANCE AUTHORITY | Sept 2015 | – WA residents | CA AG |
| California Department of Motor Vehicle | Sept 2015 | – WA residents | CA AG |
| Avis Budget | Oct 2015 | – WA residents | CA AG |
| Accuform Signs | Jun 2015 | – WA residents | CA AG |
| STILETTO Solutions | Sept 2015 | – WA residents | CA AG |
| American Bankers Association | Sept 2015 | – WA residents | CA AG |
| Noble House Hotel and Resorts | Jan 2015 | – WA residents | CA AG |
| Community Catalysts of California | Aug 2015 | – WA residents | CA AG |
| NextBus | Oct 2015 | – WA residents | CA AG |
| Scripps Networks | Aug 2015 | – WA residents | CA AG |
| Service Systems Associates | Mar 2015 | – WA residents | 2 sources ▾ |
| Vacaville Housing Authority | Aug 2015 | – WA residents | CA AG |
| Samela | Jun 2015 | – WA residents | CA AG |
| Schwab Retirement Plan Services | Aug 2015 | – WA residents | CA AG |
| Scottrade | Oct 2015 | – WA residents | CA AG |
| T-Mobile USA | Sept 2015 | – WA residents | CA AG |
| Kindred Transitional Care and Rehabilitation – Lawton | Aug 2015 | – WA residents | CA AG |
| Molina Healthcare of California | Mar 2015 | – WA residents | CA AG |
| T-Bird Restaurant | Aug 2015 | – WA residents | CA AG |
| James R. Glidewell, Dental Ceramics | Feb 2015 | – WA residents | CA AG |
| We End Violence | Sept 2015 | – WA residents | CA AG |
| University of California at Los Angeles | Jul 2015 | – WA residents | CA AG |
| M&M Automotive | Jul 2015 | – WA residents | CA AG |
| Buyers Protection | Jul 2015 | – WA residents | CA AG |
| Internet | Jul 2015 | – WA residents | CA AG |
| Nationstar Mortgage | Jul 2015 | – WA residents | CA AG |
| WP Technology | May 2015 | – WA residents | CA AG |
| Mama Mio US | Apr 2015 | – WA residents | CA AG |
| Orange County Employees Association | Jun 2015 | – WA residents | CA AG |
| Golden 1 Credit Union | Apr 2015 | – WA residents | CA AG |
| HSBC Bank USA, National Association | Jun 2015 | – WA residents | CA AG |
| Atkinson, Andelson, Loya, Ruud & Romo | Apr 2015 | – WA residents | CA AG |
| California Department of Corrections and Rehabilitation | Jul 2015 | – WA residents | CA AG |
| Insurance Services Office | Jul 2015 | – WA residents | CA AG |
| New Horizons Computer Learning Centers | Apr 2015 | – WA residents | CA AG |
| Automotive Recovery Services | Jan 2015 | – WA residents | CA AG |
| Bonita Unified School District | Jun 2015 | – WA residents | CA AG |
| Medical Informatics Engineering and NoMoreClipboard, a wholly owned subsidiary of Medical Informatics Engineering | May 2015 | – WA residents | CA AG |
| Bank of Manhattan—Mortgage Lending | Jun 2015 | – WA residents | CA AG |
| Summit Financial | Jan 2015 | – WA residents | CA AG |
| Trustmark Mutual | May 2015 | – WA residents | CA AG |
| Dungarees | Mar 2015 | – WA residents | CA AG |
| Cain Vineyard and Winery | Jun 2015 | – WA residents | CA AG |
| Charles Krug Winery | Jun 2015 | – WA residents | CA AG |
| Corison Winery | Jun 2015 | – WA residents | CA AG |
| Flora Springs Winery & Vineyards | Jun 2015 | – WA residents | CA AG |
| Gemstone Vineyards | Jun 2015 | – WA residents | CA AG |
| Heitz Wine Cellars | Jun 2015 | – WA residents | CA AG |
| Jessup Cellars | Jun 2015 | – WA residents | CA AG |
| Larkmead Vineyards Vinter and Grower | Jun 2015 | – WA residents | CA AG |
| Martinelli Winery | Jun 2015 | – WA residents | CA AG |
| Outpost Vineyards | Jun 2015 | – WA residents | CA AG |
| Palmaz Vineyards | Jun 2015 | – WA residents | CA AG |
| Pride Mountain Vineyards | Jun 2015 | – WA residents | CA AG |
| Repris Vineyards | Jun 2015 | – WA residents | CA AG |
| Rhys Vineyards | Jun 2015 | – WA residents | CA AG |
| Round Pond Estates | Jun 2015 | – WA residents | CA AG |
| Signorello Estate | Jun 2015 | – WA residents | CA AG |
| Silverado Vineyards | Jun 2015 | – WA residents | CA AG |
| Spring Mountain Vineyard | Jun 2015 | – WA residents | CA AG |
| Summers Estate Wines | Jun 2015 | – WA residents | CA AG |
| Peter Michael Winery | Apr 2015 | – WA residents | CA AG |
| San Luis Obispo County Community College District | May 2015 | – WA residents | CA AG |
| Rombauer Vineyards | Jun 2015 | – WA residents | CA AG |
| Clif Bar Family Winery & Farm | Apr 2015 | – WA residents | CA AG |
| Turley Wine Cellars | Apr 2015 | – WA residents | CA AG |
| ADP | Apr 2015 | – WA residents | CA AG |
| The Wonderful | Feb 2015 | – WA residents | CA AG |
| YP | Jun 2015 | – WA residents | CA AG |
| U.S. HealthWorks | Apr 2015 | – WA residents | CA AG |
| Heartland Payroll Solutions | Feb 2015 | – WA residents | CA AG |
| Sally Beauty | Mar 2015 | – WA residents | CA AG |
| Copart | Mar 2015 | – WA residents | CA AG |
| Blue Spring Partners | Apr 2015 | – WA residents | CA AG |
| Honig's Whistlestop | Mar 2015 | – WA residents | CA AG |
| Longwood Management | Feb 2015 | – WA residents | CA AG |
| Compass Group USA | Feb 2015 | – WA residents | CA AG |
| International Coffee & Tea | Jan 2015 | – WA residents | CA AG |
| Stater Bros. Markets | Mar 2015 | – WA residents | CA AG |
| AT&T | Apr 2015 | – WA residents | CA AG |
| Freedom Smokes | Feb 2015 | – WA residents | CA AG |
| Epic Foods | Jan 2015 | – WA residents | CA AG |
| Homebridge | Jan 2015 | – WA residents | CA AG |
| HSBC Finance | Apr 2015 | – WA residents | CA AG |
| Kellogg & Andelson Global Management | Apr 2015 | – WA residents | CA AG |
| University of California, Riverside | Mar 2015 | – WA residents | CA AG |
| Cement Masons Southern California Health and Welfare Trust Fund | Apr 2015 | – WA residents | CA AG |
| California Department of Business Oversight | Jan 2015 | – WA residents | CA AG |
| Nite Ize | Mar 2015 | – WA residents | CA AG |
| Premera Blue Cross, including Academe | Mar 2015 | – WA residents | CA AG |
| SVC-West | Jan 2015 | – WA residents | CA AG |
| Apple America | Mar 2015 | – WA residents | CA AG |
| Mark Riley | Jan 2015 | – WA residents | CA AG |
| The Painted Turtle | Mar 2015 | – WA residents | CA AG |
| Ziprick & Cramer | Jan 2015 | – WA residents | CA AG |
| Piedmont Advantage Credit Union | Jan 2015 | – WA residents | CA AG |
| Toys R Us-Delaware | Jan 2015 | – WA residents | CA AG |
| CP Franchising | Jan 2015 | – WA residents | CA AG |
| Big Fish Games | Feb 2015 | – WA residents | CA AG |
| Liberty Tax Service | Feb 2015 | – WA residents | CA AG |
| Packers Sanitation Services | Feb 2015 | – WA residents | CA AG |
| Kings County Office of Education | Feb 2015 | – WA residents | CA AG |
| CICS Employment Services | Jan 2015 | – WA residents | CA AG |
| Park 'N Fly | Jan 2015 | – WA residents | CA AG |
| Law Offices of David A. Krausz | Jan 2015 | – WA residents | CA AG |
| United Airlines | Jan 2015 | – WA residents | CA AG |
| Fast Forward Academy | Jan 2015 | – WA residents | CA AG |
No 2015 breach matches that.
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Breach data from Have I Been Pwned, licensed under CC BY 4.0; the U.S. Department of Health and Human Services' breach portal; and the public breach notices of the California and Washington Attorneys General (Washington counts are state residents only). Sensitive breaches (such as adult and dating sites), spam lists, fabricated breaches and malware logs aren't listed.