10%
SRB Corp is a corporate entity classified as a 10% Owner of Safety Insurance Group Inc (SAFT), a provider of private passenger automobile, homeowners, and related insurance products.[[1]](https://www.gurufocus.com/insider/67154/srb-corp)[[3]](https://www.marketbeat.com/instant-alerts/safety-insurance-group-nasdaqsaft-major-shareholder-corp-srb-sells-4089-shares-2026-02-25/) Based in Boston, MA, SRB Corp holds a substantial stake in SAFT, owning approximately 1,842,284 shares as of mid-2023, valued at over $143 million at that time, representing about 12.42% to 33.20% of the company depending on the reporting period.[[1]](https://www.gurufocus.com/insider/67154/srb-corp)[[2]](https://www.wallstreetzen.com/stocks/us/nasdaq/saft/ownership)
SRB Corp has been actively involved in insider trading of SAFT stock, completing 11 purchases totaling significant acquisitions, including 32,384 shares bought on July 19, 2023, for around $2 million, with no recorded sales until recently.[[1]](https://www.gurufocus.com/insider/67154/srb-corp)[[5]](https://marketchameleon.com/Overview/SAFT/InsiderTrades/) Most recently, on February 24, 2026, SRB Corp sold 3,231 shares at an average price of $77.14, reducing its direct holdings to 1,838,195 shares valued at approximately $142.4 million, marking a 0.22% decrease in position.[[3]](https://www.marketbeat.com/instant-alerts/safety-insurance-group-nasdaqsaft-major-shareholder-corp-srb-sells-4089-shares-2026-02-25/) Further sales, such as 7,320 shares in another transaction, indicate ongoing portfolio adjustments as a major shareholder required to report to the SEC.[[6]](https://www.tipranks.com/news/insider-trading/major-safety-insurance-stakeholder-makes-notable-move-with-latest-share-sale-insider-trading-news)[[1]](https://www.gurufocus.com/insider/67154/srb-corp)
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