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Count drift: breaches that grew
The first number a breach is announced with is often not the last. These are the breaches on the tracker whose count grew after the first notice: the same kind of count, from a later and larger source.
- Breaches that grew
- 14
- Typical growth
- ×2.3
- Largest
- ×96
- Typical days to the larger count
- 14
Together these breaches went from 305,392,804 to 344,923,327 in their first and largest counts: 39,530,523 more than first announced.
Every breach that grew, largest growth first
- SBI ×96
- Lennar Mortgage ×52
- BreachForums ×50
- Roblox ×13
- Buechel Stone ×4.8
- Capital One ×4
- Interim HealthCare ×2.6
- Allstate ×2.3
- Wiley Rein ×2.1
- Community Physicians of Indiana ×2
- Fidelity National Title ×2
- Explore Talent (August 2024) ×1.7
- LPL Financial ×1.3
- Binance ×1.1
How it is counted
Each breach on the tracker keeps every notice about it: each state’s filing, each official register, each news report, with the number it gave and the day. A breach counts here when a later notice gives a larger number, at least 10% larger, in the same unit as the first (people with people, accounts with accounts). A state’s count of its own residents is never compared with a total: a breach told to several states is not growing, it is being counted state by state. Claims made only by attackers never count.
A larger count usually means the investigation found more: more people, more records, more systems. It is also why the first number in a headline should be read as a floor. Each breach links to its page, with every notice and its source.
From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Accuracy audit · For journalists · Found a mistake? Tell us and we correct it.