SRB CORP 4

What Happened SRB Corporation (reported as a 10% owner and investment manager affiliate of The Plymouth Rock Company Incorporated) reported a sale of 14,151 shares of Safety Insurance Group Inc. (SAFT) on 2026-03-20. The shares were disposed at $71.12 per share for a total proceeds of $1,006,447. This was a sale (disposition), which is typically routine and does not by itself indicate insider confidence or lack thereof.

Key Details

• Transaction date and price: 2026-03-20 — 14,151 shares sold at $71.12 per share. Total proceeds reported: $1,006,447.
• Transaction type: Open market or private sale (reported as "S" — sale/disposition).
• Filing date / timeliness: Form 4 filed 2026-03-23. Based on the trade date, this filing was within the required reporting window.
• Shares owned after transaction: The excerpt does not list a single post-transaction ownership number for SRB alone. The Form 4 discloses aggregate holdings tied to the reporting parties: PRC directly holds 4,120 shares; certain PRC subsidiaries hold 772,856 shares; and PSIA-related entities hold 1,017,679 shares — totaling 1,794,655 shares reported on this Form 4.
• Notable footnotes: This 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; both parties include disclaimers that they do not necessarily claim beneficial ownership of the shares reported. The filing also notes the parties may be deemed a "group" under Section 13(d)(3) but expressly disclaims that a group exists for other purposes.

Context

• This filing involves an institutional/10% owner entity and affiliated subsidiaries, not an individual executive. Institutional sales can reflect portfolio management or rebalancing rather than personal decisions by company officers.
• No option exercises, awards, gifts, or tax‑withholding actions are reported in this transaction — it is a straight sale/disposition.