| Company Compromised |
Year |
Potential Users Affected |
| 21st Century Oncology |
2016 |
2,200,000 |
| 7-11 and Nasdaq |
2012 |
160,000,000 |
| Accendo Insurance Co. |
2011 |
175,350 |
| Adobe Systems |
2013 |
152,000,000 |
| Advocate Medical Group |
2013 |
4,000,000 |
| Affinity Health Plan, Inc. |
2009 |
344,579 |
| Ameritrade |
2005 |
200,000 |
| Ankle & Foot Center of Tampa Bay, Inc. |
2010 |
156,000 |
| Anthem Inc. |
2015 |
80,000,000 |
| AOL |
2014 |
2,400,000 |
| AOL |
2006 |
20,000,000 |
| AOL |
2004 |
92,000,000 |
| Apple |
2013 |
275,000 |
| Apple Health Medicaid |
2016 |
91,000 |
| Apple, Inc./BlueToad |
2012 |
12,367,232 |
| Ashley Madison |
2015 |
32,000,000 |
| AT&T |
2008 |
113,000 |
| AT&T |
2010 |
114,000 |
| Auction.co.kr |
2008 |
18,000,000 |
| Australian Immigration Department |
2015 |
unknown |
| Automatic Data Processing |
2005 |
125,000 |
| AvMed, Inc. |
2009 |
1,220,000 |
| Bailey’s Inc. |
2015 |
250,000 |
| Bank of America |
2005 |
1,200,000 |
| Barnes & Noble |
2012 |
unknown |
| Bedford/St. Martin’s |
2012 |
unknown |
| Betfair |
2010 |
2,300,000 |
| Bethesda Game Studios |
2011 |
200,000 |
| Blizzard Entertainment |
2012 |
14,000,000 |
| BlueCross BlueShield of Tennessee |
2009 |
1,023,209 |
| British Airways |
2015 |
unknown |
| California Department of Child Support Services |
2012 |
800,000 |
| CardSystems Solutions Inc. |
2005 |
40,000,000 |
| CareFirst BlueCross Blue Shield – Maryland |
2015 |
1,100,000 |
| Central Coast Credit Union |
2016 |
60,000 |
| Central Hudson Gas & Electric |
2013 |
110,000 |
| CheckFree Corporation |
2009 |
5,000,000 |
| China Software Developer Network |
2011 |
6,000,000 |
| Chinese Software Developer Network (CSDN) |
2011 |
38,000,000 |
| Citigroup |
2013 |
150,000 |
| Citigroup |
2005 |
3,900,000 |
| Citigroup |
2011 |
360,083 |
| City and Hackney Teaching Primary Care Trust |
2007 |
160,000 |
| Colorado Government |
2010 |
105,470 |
| Commission on Elections |
2016 |
55,000,000 |
| Community Health Systems |
2014 |
4,500,000 |
| Compass Bank |
2007 |
1,000,000 |
| Countrywide Financial Corp |
2011 |
2,500,000 |
| Countrywide Financial Corp |
2006 |
2,600,000 |
| Cox Communications |
2016 |
40,000 |
| Crescent Health Inc., Walgreens |
2013 |
100,000 |
| CVS |
2015 |
unknown |
| Dai Nippon Printing |
2007 |
8,637,405 |
| Data Processors International |
2008 |
8,000,000 |
| Defense Integrated Data Center |
2017 |
unknown |
| Deloitte |
2017 |
350 |
| Democratic National Committee |
2016 |
19,252 |
| Department of Homeland Security |
2016 |
30,000 |
| Domino’s Pizza |
2014 |
600,000 |
| Driving Standards Agency |
2007 |
3,000,000 |
| Dropbox |
2012 |
unknown |
| Drupal |
2013 |
1,000,000 |
| DSW Inc. |
2005 |
1,400,000 |
| Dun & Bradstreet |
2013 |
1,000,000 |
| eBay |
2014 |
145,000,000 |
| Educational Credit Management Corporation |
2010 |
3,300,000 |
| Eisenhower Medical Center |
2011 |
514,330 |
| Embassy Cables |
2010 |
251,000 |
| Emergency Healthcare Physicians, Ltd. |
2010 |
180,111 |
| Emory Healthcare |
2012 |
315,000 |
| Equifax |
2017 |
143,000,000 |
| Erie County Medical Center |
2017 |
unknown |
| European Central Bank |
2014 |
unknown |
| Evernote |
2013 |
50,000,000 |
| Excellus BlueCross BlueShield |
2015 |
10,000,000 |
| Experian – T-Mobile |
2015 |
15,000,000 |
| EyeWire |
2016 |
unknown |
| Facebook |
2013 |
6,000,000 |
| Facebook |
2015 |
50,000,000 |
| Federal Reserve Bank of Cleveland |
2010 |
400,000 |
| Fidelity National Information Services |
2007 |
8,500,000 |
| Florida Department of Juvenile Justice |
2013 |
100,000 |
| Formspring |
2012 |
420,000 |
| Friend Finder Networks |
2016 |
412,214,295 |
| Gamigo |
2012 |
8,000,000 |
| Gap Inc. |
2007 |
800,000 |
| Gawker |
2010 |
1,500,000 |
| Global Payments |
2012 |
7,000,000 |
| Gmail |
2014 |
5,000,000 |
| Greek Government |
2012 |
9,000,000 |
| Grozio Chirurgija |
2017 |
25,000 |
| GS Caltex |
2008 |
11,100,000 |
| Gyft |
2016 |
unknown |
| Hannaford Brothers Supermarket Chain |
2007 |
4,200,000 |
| Health Net |
2009 |
500,000 |
| Health Net — IBM |
2011 |
1,900,000 |
| Heartland |
2009 |
130,000,000 |
| Heathrow Airport |
2017 |
unknown |
| Hewlett Packard |
2006 |
200,000 |
| Hilton Hotels |
2015 |
unknown |
| Home Depot |
2014 |
56,000,000 |
| Home Office |
2008 |
84,000 |
| Honda Canada |
2011 |
283,000 |
| Hyatt Hotels |
2015 |
unknown |
| Internal Revenue Service |
2015 |
720,000 |
| Inuvik hospital |
2016 |
6,700 |
| Jefferson County West Virginia |
2008 |
1,600,000 |
| JP Morgan Chase |
2010 |
2,600,000 |
| JP Morgan Chase |
2014 |
76,000,000 |
| KDDI |
2006 |
4,000,000 |
| Kirkwood Community College |
2013 |
125,000 |
| KM.RU |
2016 |
1,500,000 |
| Korea Credit Bureau |
2014 |
20,000,000 |
| Kroll Background America |
2013 |
1,000,000 |
| KT Corporation |
2012 |
8,700,000 |
| Landry’s, Inc. |
2015 |
unknown |
| LexisNexis |
2014 |
1,000,000 |
| Lincoln Medical & Mental Health Center |
2010 |
130,495 |
| LinkedIn, eHarmony, Last.fm |
2012 |
8,000,000 |
| Living Social |
2013 |
50,000,000 |
| MacRumors.com |
2014 |
860,000 |
| Mandarin Oriental Hotels |
2014 |
2,835 |
| Massachusetts Government |
2011 |
210,000 |
| Medicaid |
2012 |
780,000 |
| Medical Informatics Engineering |
2015 |
3,900,000 |
| Memorial Healthcare System |
2011 |
102,153 |
| Michaels |
2014 |
3,000,000 |
| MilitarySingles.com |
2012 |
163,792 |
| Ministry of Education |
2008 |
6,000,000 |
| Monster.com |
2007 |
1,600,000 |
| Morgan Stanley Smith Barney |
2011 |
34,000 |
| Mozilla |
2014 |
76,000 |
| NASDAQ |
2014 |
unknown |
| National Archives and Records Administration |
2009 |
76,000,000 |
| National Guard of the United States |
2009 |
131,000 |
| Natural Grocers |
2015 |
93 stores |
| Neiman Marcus |
2014 |
1,100,000 |
| Nemours Foundation |
2011 |
1,055,489 |
| Network Solutions |
2009 |
573,000 |
| New York City Health & Hospitals Corp. |
2010 |
1,700,000 |
| New York State Electric & Gas |
2012 |
1,800,000 |
| New York Taxis |
2014 |
52,000 |
| Nexon Korea Corp |
2011 |
13,200,000 |
| NHS |
2011 |
8,300,000 |
| Nintendo |
2013 |
240,000 |
| Nival Networks |
2016 |
1,500,000 |
| Norwegian Tax Administration |
2008 |
3,950,000 |
| Ofcom |
2016 |
unknown |
| Office of Personnel Management |
2015 |
21,500,000 |
| Office of the Texas Attorney General |
2012 |
6,500,000 |
| Ohio State University |
2010 |
760,000 |
| Orbitz |
2018 |
880,000 |
| Oregon Department of Transportation |
2011 |
62 |
| OVH |
2013 |
unknown |
| Premera |
2015 |
11,000,000 |
| Puerto Rico Department of Health |
2010 |
515,000 |
| Rambler.ru |
2012 |
98,167,935 |
| RBS Worldpay |
2008 |
1,500,000 |
| Restaurant Depot |
2011 |
200,000 |
| RockYou! |
2009 |
32,000,000 |
| Rosen Hotels |
2016 |
unknown |
| Saderat, Eghtesad Novin, and Saman |
2012 |
3,000,000 |
| San Francisco Public Utilities Commission |
2011 |
180,000 |
| Scottrade |
2015 |
4,600,000 |
| Scribd |
2013 |
500,000 |
| Seacoast Radiology, PA |
2010 |
231,400 |
| Sega |
2011 |
1,290,755 |
| Service Personnel and Veterans Agency |
2008 |
50,500 |
| Slack |
2015 |
500,000 |
| SnapChat |
2013 |
4,700,000 |
| Sony Online Entertainment |
2011 |
24,600,000 |
| Sony Pictures |
2011 |
1,000,000 |
| Sony PlayStation Network |
2011 |
77,000,000 |
| South Africa Police |
2013 |
16,000 |
| South Carolina Government |
2012 |
6,400,000 |
| South Shore Hospital, Massachusetts |
2010 |
800,000 |
| Southern California Medical-Legal Consultants |
2011 |
300,000 |
| Spartanburg Regional Healthcare System |
2011 |
400,000 |
| Stanford University |
2008 |
72,000 |
| Starbucks |
2008 |
97,000 |
| Starwood Hotels |
2015 |
unknown |
| State of Texas |
2011 |
3,500,000 |
| Steam |
2011 |
35,000,000 |
| Stratfor |
2011 |
935,000 |
| Supervalu |
2014 |
200 stores |
| Sutter Medical Center |
2011 |
4,243,434 |
| Syria Files |
2012 |
2,434,899 |
| Taobao |
2016 |
20,000,000 |
| Target Corporation |
2014 |
70,000,000 |
| Taringa! |
2017 |
28,722,877 |
| TaxSlayer.com |
2016 |
unknown |
| TD Bank |
2012 |
260,000 |
| TD Ameritrade |
2007 |
6,300,000 |
| TerraCom & YourTel |
2013 |
170,000 |
| Texas Lottery |
2007 |
89,000 |
| The Bank of New York Mellon |
2008 |
12,500,000 |
| Tianya Club |
2011 |
28,000,000 |
| TJ Maxx |
2007 |
94,000,000 |
| T-Mobile, Deutsche Telecom |
2006 |
17,000,000 |
| Tricare |
2011 |
4,901,432 |
| Triple-S Salud, Inc. |
2010 |
398,000 |
| Trump Hotels |
2014 |
unknown |
| Tumblr |
2013 |
65,469,298 |
| Twitch.tv |
2015 |
unknown |
| Twitter |
2013 |
250,000 |
| U.S. Army |
2010 |
392,000 |
| U.S. Army |
2011 |
50,000 |
| U.S. Department of Defense |
2009 |
72,000 |
| U.S. Department of Veteran Affairs |
2006 |
26,500,000 |
| U.S. Law Enforcement |
2011 |
123,461 |
| Uber |
2014 |
50,000 |
| Uber |
2017 |
57,000,000 |
| Ubisoft |
2013 |
unknown |
| Ubuntu |
2013 |
2,000,000 |
| UCLA Medical Center, Santa Monica |
2015 |
4,500,000 |
| UK Ministry of Defence |
2008 |
1,700,000 |
| UK Revenue & Customs |
2007 |
25,000,000 |
| Under Armour (MyFitnessPal app) |
2018 |
150,000,000 |
| United States Diplomatic Cables Leak |
2010 |
260,000 |
| University of California, Berkeley |
2009 |
160,000 |
| University of California, Berkeley |
2016 |
80,000 |
| University of Central Florida |
2016 |
63,000 |
| University of Maryland, College Park |
2014 |
300,000 |
| University of Miami |
2008 |
2,100,000 |
| University of Utah Hospital & Clinics |
2008 |
2,200,000 |
| University of Wisconsin–Milwaukee |
2011 |
73,000 |
| UPS |
2014 |
unknown |
| Verizon Communications |
2016 |
1,500,000 |
| Virginia Department of Health |
2009 |
8,257,378 |
| Virginia Prescription Monitoring Program |
2009 |
531,400 |
| Vodafone |
2013 |
2,000,000 |
| VTech |
2015 |
5,000,000 |
| Walmart |
2015 |
unknown |
| Washington Post |
2011 |
1,270,000 |
| Washington State Court System |
2013 |
160,000 |
| Weebly |
2016 |
43,430,316 |
| Wendy’s |
2015 |
unknown |
| Writerspace.com |
2011 |
62,000 |
| Xat.com |
2015 |
6,054,459 |
| Yahoo |
2014 |
500,000,000 |
| Yahoo Inc. |
2013 |
3,000,000,000 |
| Yahoo Japan |
2013 |
22,000,000 |
| Yahoo! Voices |
2012 |
450,000 |
| Yale University |
2010 |
43,000 |
| Zappos |
2012 |
24,000,000 |
