SRB CORP 4

What Happened
SRB Corporation (reported as a 10% owner and filing jointly with The Plymouth Rock Company Incorporated) sold 34,272 shares of Safety Insurance Group Inc. (SAFT) on July 13, 2026. The shares were disposed at $76.04 each for a total value of $2,605,933. This was a sale (S) — not a purchase or option exercise — and sales by institutional/affiliate holders are often routine portfolio or cash‑management transactions rather than direct signals about company prospects.

Key Details

• Transaction date: 2026-07-13; Filing date (Form 4): 2026-07-14 (timely filing).
• Amount sold: 34,272 shares at $76.04 per share; proceeds ≈ $2,605,933.
• Transaction type: Sale (open market or private sale; the filing indicates either/or but does not specify which).
• Shares owned after transaction: Not specified in the provided excerpt of the filing.
• Notable footnotes: The Form 4 is jointly filed by SRB Corporation and The Plymouth Rock Company (PRC). SRB is a direct, wholly‑owned subsidiary of PRC and acts as investment manager to PRC; SRB and PRC disclaim beneficial ownership of certain reported shares except to the extent of pecuniary interest. The filing lists numerous PRC subsidiaries and related entities holding large aggregated positions (examples in the filing: PRC direct holding of 4,120 shares, subsidiaries totaling 757,680 shares, and PSIA-related entities totaling 995,933 shares).
• No 10b5‑1 plan, tax withholding, or option exercise is indicated in the provided excerpt.

Context

• This is institutional/affiliate selling by a corporate reporting person (SRB/PRC group), not an individual officer or director. Such sales commonly reflect portfolio rebalancing or liquidity needs rather than insider views of the business.
• Because this is a straight sale (code S) with no exercise or award involved, there's no immediate complexity like cashless exercise or tax withholding to interpret.