ARCH CAPITAL GROUP LTD. (ACGL) Insider Transactions
Over the last 12 months, 17 ARCH CAPITAL GROUP LTD. (ACGL) insiders filed 74 SEC Form 4 transactions — $516.0K in open-market purchases ( 2 distinct buyers) and $29.1M in open-market sales. 0% of all transactions were executed under a pre-scheduled Rule 10b5-1 trading plan.
- $516.0KOpen-market buys (1y)
- $29.1MOpen-market sells (1y)
- 17Distinct insiders
- 74Transactions filed
- 0%Under Rule 10b5-1 plan
- 2026-06-03Latest filing
Recent Form 4 Filings Most recent 50 of 74 (1-year window)
Each row is a single Form 4 filing event for ACGL, sourced directly from SEC EDGAR. The Type column classifies the SEC transaction code into Buy / Sell / Grant / Exercise / Other; the 10b5-1 badge marks trades executed under a pre-scheduled SEC Rule 10b5-1 plan.
| Date | Insider | Title | Type | SEC Code | Value | Shares | Price |
|---|---|---|---|---|---|---|---|
| 2026-06-03 | Posner Brian S | — | Sell | S | $59.0K | 3,000 | $19.66 |
| 2026-05-11 | Posner Brian S | — | Sell | S | $34.3K | 2,000 | $17.14 |
| 2026-05-05 | Triplett Neal F | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | Triplett Neal F | — | Grant | A | $0 | 1,327 | — |
| 2026-05-05 | Posner Brian S | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | MOCZARSKI ALEXANDER S | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | MALLESCH EILEEN A | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | KILCOYNE MOIRA A. | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | KILCOYNE MOIRA A. | — | Grant | A | $0 | 1,327 | — |
| 2026-05-05 | Houston Daniel Joseph | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | Houston Daniel Joseph | — | Grant | A | $0 | 1,327 | — |
| 2026-05-05 | Goodman Laurie | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | Ebong Francis | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | BUNCE JOHN L JR | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | BUNCE JOHN L JR | — | Grant | A | $0 | 1,327 | — |
| 2026-05-05 | PASQUESI JOHN M | — | Grant | A | $0 | 2,071 | — |
| 2026-05-05 | PASQUESI JOHN M | — | Grant | A | $0 | 1,327 | — |
| 2026-05-05 | PASQUESI JOHN M | — | Grant | A | $0 | 1,858 | — |
| 2026-04-30 | Houston Daniel Joseph | — | Buy | P | $498.7K | 5,300 | $94.08 |
| 2026-03-11 | Posner Brian S | — | Sell | — | $51.3K | 3,000 | $17.11 |
| 2026-03-10 | Gansberg David | President, Arch Capital Group | Grant | — | $203.6K | 10,770 | $18.90 |
| 2026-03-10 | Gansberg David | President, Arch Capital Group | Grant | — | $0 | 10,770 | $0.00 |
| 2026-03-10 | Papadopoulo Nicolas | CEO | Grant | — | $414.5K | 21,930 | $18.90 |
| 2026-03-10 | Papadopoulo Nicolas | CEO | Grant | — | $0 | 21,930 | $0.00 |
| 2026-03-10 | Gansberg David | President, Arch Capital Group | Sell | — | $569.3K | 5,907 | $96.37 |
| 2026-03-10 | Papadopoulo Nicolas | CEO | Sell | — | $2.1M | 21,930 | $96.31 |
| 2026-03-04 | Rajeh Maamoun | President, Arch Capital Group | Grant | — | $0 | 40,600 | $0.00 |
| 2026-03-04 | Rajeh Maamoun | President, Arch Capital Group | Grant | — | $0 | 40,600 | $0.00 |
| 2026-03-04 | PETRILLO LOUIS T | Officer of Subsidiary | Grant | — | $790.3K | 8,030 | $98.42 |
| 2026-03-04 | Gansberg David | President, Arch Capital Group | Grant | — | $1.2M | 12,519 | $98.42 |
| 2026-03-03 | Rajeh Maamoun | President, Arch Capital Group | Grant | — | $0 | 6,843 | $0.00 |
| 2026-03-03 | Rajeh Maamoun | President, Arch Capital Group | Grant | — | $0 | 24,475 | $0.00 |
| 2026-03-03 | Todd Christine | Chief Investment Officer | Grant | — | $0 | 3,981 | $0.00 |
| 2026-03-03 | Todd Christine | Chief Investment Officer | Grant | — | $0 | 14,238 | $0.00 |
| 2026-03-03 | Todd Christine | Chief Investment Officer | Grant | — | $0 | 6,305 | $0.00 |
| 2026-03-03 | PETRILLO LOUIS T | Officer of Subsidiary | Grant | — | $0 | 2,889 | $0.00 |
| 2026-03-03 | PETRILLO LOUIS T | Officer of Subsidiary | Grant | — | $0 | 10,331 | $0.00 |
| 2026-03-03 | Morin Francois | CFO and Treasurer | Grant | — | $0 | 5,329 | $0.00 |
| 2026-03-03 | Morin Francois | CFO and Treasurer | Grant | — | $0 | 19,061 | $0.00 |
| 2026-03-03 | Gansberg David | President, Arch Capital Group | Grant | — | $0 | 6,843 | $0.00 |
| 2026-03-03 | Gansberg David | President, Arch Capital Group | Grant | — | $0 | 24,475 | $0.00 |
| 2026-03-03 | Papadopoulo Nicolas | CEO | Grant | — | $0 | 21,318 | $0.00 |
| 2026-03-03 | Papadopoulo Nicolas | CEO | Grant | — | $0 | 76,243 | $0.00 |
| 2026-02-27 | PETRILLO LOUIS T | Officer of Subsidiary | Grant | — | $31.2K | 312 | $100.15 |
| 2026-02-27 | Gansberg David | President, Arch Capital Group | Grant | — | $55.4K | 553 | $100.15 |
| 2026-02-24 | Papadopoulo Nicolas | CEO | Grant | — | $0 | 46,674 | $0.00 |
| 2026-02-24 | Rajeh Maamoun | President, Arch Capital Group | Grant | — | $0 | 28,546 | $0.00 |
| 2026-02-24 | Todd Christine | Chief Investment Officer | Grant | — | $0 | 25,046 | $0.00 |
| 2026-02-24 | PETRILLO LOUIS T | Officer of Subsidiary | Grant | — | $40.9K | 412 | $99.18 |
| 2026-02-24 | PETRILLO LOUIS T | Officer of Subsidiary | Grant | — | $0 | 17,136 | $0.00 |
Showing the most recent 50 of 74 transactions. For the full 1-year history with sorting, filtering, and cross-ticker industry context, open the full insider transactions drilldown.
Top Insider Buyers of ACGL By dollar volume, 1-year window
- Houston Daniel Joseph $498.7K
- Posner Brian S $17.3K
Methodology & FAQ
How We Track ACGL Insider Transactions
Form 4 disclosures are sourced directly from SEC EDGAR and re-ingested on every pipeline cycle. A complete description of transaction-code handling, the open-market vs grant distinction, and the Rule 10b5-1 plan-reference heuristic is documented in the Methodology.
What is an SEC Form 4 filing for ARCH CAPITAL GROUP LTD.?
Form 4 is a transaction-level disclosure that corporate insiders — officers, directors, and beneficial owners of more than 10% of a registered class of equity securities — must file with the SEC within two business days of any change in their beneficial ownership of ARCH CAPITAL GROUP LTD. (ACGL) shares.
What is a Rule 10b5-1 trading plan?
Rule 10b5-1 is an SEC rule that lets insiders schedule trades in advance under a written plan, providing an affirmative defense against insider-trading allegations as long as the plan was adopted in good faith and not while in possession of material non-public information. Form 4 rows marked "10b5-1" on this page indicate the underlying trade was executed under such a plan; rows without the badge are discretionary or did not reference a plan in the Form 4 footnotes.
How is "insider buying" different from a stock grant or option exercise?
An insider buy (SEC transaction code P) is an open-market purchase of ARCH CAPITAL GROUP LTD. (ACGL) stock executed at the prevailing market price using the insider's personal capital. Stock grants (code A) and option exercises (code M) are compensation events, not directional trades; they are tracked separately and excluded from the "conviction" signal because they are not discretionary purchases.
How recent is the data?
Form 4 transactions are typically reported within two business days of execution. Pactolio re-ingests the EDGAR feed on a nightly cycle and reflects new filings on the next ingest run, typically within 24 hours of EDGAR acceptance. The table on this page covers the most recent 1-year window.