SRB CORP 4

What Happened

• SRB Corporation (reported as a 10% owner and investment manager) reported an open-market/private sale of 5,159 shares of Safety Insurance Group, Inc. (SAFT) on July 17, 2026. The shares were sold at $76.03 per share for gross proceeds of approximately $392,247. The Form 4 was filed on July 20, 2026.
• This was a sale (disposition) by an institutional reporting person rather than an individual executive; sales are often routine and do not necessarily signal management sentiment.

Key Details

• Transaction date and price: 2026-07-17 — 5,159 shares sold at $76.03 each.
• Gross proceeds: ~$392,247.
• Filing date: Form 4 filed 2026-07-20 — appears filed within the standard 2-business-day window for Form 4s.
• Shares owned after transaction: Not specified in the primary transaction line of the provided filing excerpt.
• Notable footnotes:
  • F1–F2: This Form 4 is a joint filing by SRB Corporation and The Plymouth Rock Company Incorporated (PRC); SRB is a direct, wholly‑owned subsidiary of PRC and acts as investment manager, and SRB disclaims beneficial ownership of the shares reported.
  • F3–F5: The filing lists PRC and various subsidiaries (and managed entities like PSIA) as holding shares reported on this Form 4 — e.g., PRC directly 4,120 shares; certain PRC subsidiaries aggregate 755,559 shares; PSIA and its subsidiaries aggregate 992,895 shares. PRC disclaims beneficial ownership except to the extent of pecuniary interest.
• Transaction type code: S = Sale (open market or private sale).

Context

• This is institutional/10% owner activity (SRB/PRC group), not an insider executive trade; institutional sales can reflect portfolio rebalancing or other fund-level decisions rather than company-specific views.
• Footnotes emphasize disclaimers of beneficial ownership and that the filing is joint; treat ownership statements as managed/institutional holdings rather than personal insider stakes.