SRB CORP - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
SRB CORP has filed 5 SEC Form 4 filings across 1 company in the last 90 days - selling. Lifetime open-market sales: $138.65M.
Profile
SRB CORP is a corporate entity that reports beneficial ownership of shares in SAFETY INSURANCE GROUP INC (SAFT) under U.S. securities law. It has submitted 8 SEC insider filings since 2026, most recently in July 2026.
| Filer type | Company |
|---|---|
| Role | 10% Owner |
| Notability | 20/100 |
Board memberships
- SAFETY INSURANCE GROUP INC
Reported roles
- 10% Owner
Awards & honors
- Listed as a 10% owner in Safety Insurance Group Inc in the 2026 SEC filing (March 23, 2026).
Trading Pattern
InsiderAlpha's records for SRB CORP go back to 2026: 10 primary Form 4 filings, an average of 10.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role SRB CORP has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- 10% Owner at SAFETY INSURANCE GROUP INC (SAFT) - 2 filings, 2026
- 10% Owner at SAFETY INSURANCE GROUP INC (SAFT) - 8 filings, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-29 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 774.2K | $103.05 | $79.78M |
| 2026-07-29 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 466.2K | $103.09 | $48.06M |
| 2026-07-27 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 38.8K | $103.08 | $4.00M |
| 2026-07-20 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 5.2K | $76.03 | $392K |
| 2026-07-15 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 34.3K | $76.04 | $2.61M |
| 2026-07-10 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 2.6K | $76.51 | $203K |
| 2026-03-23 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 14.2K | $71.12 | $1.01M |
| 2026-03-19 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 1.2K | $73.06 | $88K |
| 2026-03-03 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 11.3K | $76.49 | $862K |
| 2026-03-03 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 235 | $77.82 | $18K |
| 2026-02-27 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 6.2K | $77.89 | $483K |
| 2026-02-27 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 5.3K | $78.91 | $417K |
| 2026-02-27 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 2.1K | $78.29 | $168K |
| 2026-02-25 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 3.2K | $77.14 | $249K |
| 2026-02-25 | SAFT | SAFETY INSURANCE GROUP INC | S - Open-market sale | 4.1K | $77.48 | $317K |
Companies - Last 90 Days
- SAFETY INSURANCE GROUP INC (SAFT) - 5 filings, last 2026-07-29
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies SRB CORP has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Dennis J. Langwell - $288K of SAFT open-market activity in the last 12 months
- Glenn Hiltpold - $4K of SAFT open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Murray Stahl
- Robert W. Stallings
- STEEL PARTNERS HOLDINGS L.P.
- Eddie L. Steiner
- Joseph Stilwell
- William P. Stiritz
- SUMITOMO MITSUI FINANCIAL GROUP, INC.
- Suva
Frequently Asked Questions
What is SRB CORP?
SRB CORP is a corporate entity that reports beneficial ownership of shares in SAFETY INSURANCE GROUP INC (SAFT) under U.S. securities law. It has submitted 8 SEC insider filings since 2026, most recently in July 2026.…
How many SEC Form 4 filings has SRB CORP submitted recently?
5 primary Form 4 filings in the last 90 days, covering 1 company.
Has SRB CORP been buying or selling stock?
Recorded transactions: 0 open-market purchases and 15 open-market sales ($138.65M) across all tracked filings.
Where can I see all of SRB CORP's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live SRB CORP profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.