Insider txns (12m)
16
Stock / equity
ACGL ARCH CAPITAL GROUP LTD.
- Company
- ARCH CAPITAL GROUP LTD.
- Security
- Equity
- Size, estimated from filings
- Mid cap ($2B – $10B)
- Insiders on record
- 8
- Members of Congress
- 1
- Latest trade on record
- August 18, 2026
ACGL (ARCH CAPITAL GROUP LTD.) has 16 disclosed insider transactions from 8 insiders in the last 12 months (0 open-market buys, 3 sales, about $1.5M at reported prices) and 1 congressional trade from 1 member of Congress. The most recent disclosure was filed August 20, 2026.
Open-market buys / sales
0 / 3
Congress trades (12m)
1
Distinct filers (12m)
9
Share price
Price and chart by TradingView for ARCH CAPITAL GROUP LTD.. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
ACGL in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
3 people account for the disclosed buying and selling in ACGL over the last 12 months; the most active is Morin Francois with $1.1M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 3 open-market trades in ACGL since May 11, 2026, at prices from $17.14 to $99.32; the most recent was a sale at $99.32 on Aug 18, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Posner Brian S
Posner Brian S reported 0 shares held after the latest filing, against 122,175 at the first on record.
Insiders trading ACGL
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Morin Francois | CFO and Treasurer | 3 | 0 | 1 | — | $1.1M | August 18, 2026 |
| Posner Brian S | Director | 3 | 0 | 2 | — | $93K | June 3, 2026 |
| PASQUESI JOHN M | Director | 2 | 0 | 0 | — | — | June 11, 2026 |
| Houston Daniel Joseph | Director | 2 | 0 | 0 | — | — | May 5, 2026 |
| KILCOYNE MOIRA A. | Director | 2 | 0 | 0 | — | — | May 5, 2026 |
| Triplett Neal F | Director | 2 | 0 | 0 | — | — | May 5, 2026 |
| MALLESCH EILEEN A | Director | 1 | 0 | 0 | — | — | May 5, 2026 |
| MOCZARSKI ALEXANDER S | Director | 1 | 0 | 0 | — | — | May 5, 2026 |
What kind of transactions these are 4 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 9 | 16,407 | — |
| S | Open-market sale | 3 | 16,010 | $1.2M |
| G | Gift | 2 | 2,013,400 | — |
| M | Option exercise or conversion | 2 | 22,020 | $298K |
What each code means: Form 4 transaction codes.
Members of Congress trading ACGL
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Alan Armstrong | Senator (OK), Republican | 1 | 1 | 0 | $1,001–$15K | March 27, 2026 |
Insider transactions
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Morin Francois | Option / conversion M | August 18, 2026 | August 20, 2026 | 2d | 11,010 | — | — | derivative | Form 4 ↗ | |
| Morin Francois | Sell S | August 18, 2026 | August 20, 2026 | 2d | 11,010 | $99 | $1.1M | Form 4 ↗ | ||
| Morin Francois | Option / conversion M | August 18, 2026 | August 20, 2026 | 2d | 11,010 | $27 | $298K | Form 4 ↗ | ||
| PASQUESI JOHN M | Other G | June 11, 2026 | June 15, 2026 | 4d | 1,006,700 | — | — | indirect | Form 4 ↗ | |
| PASQUESI JOHN M | Other G | June 11, 2026 | June 15, 2026 | 4d | 1,006,700 | — | — | indirect | Form 4 ↗ | |
| Posner Brian S | Sell S | June 3, 2026 | June 4, 2026 | 1d | 3,000 | $20 | $59K | Form 4 ↗ | ||
| Posner Brian S | Sell S | May 11, 2026 | May 12, 2026 | 1d | 2,000 | $17 | $34K | Form 4 ↗ | ||
| Houston Daniel Joseph | Other A | May 5, 2026 | May 7, 2026 | 2d | 1,327 | — | — | Form 4 ↗ | ||
| Houston Daniel Joseph | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,071 | — | — | Form 4 ↗ | ||
| KILCOYNE MOIRA A. | Other A | May 5, 2026 | May 7, 2026 | 2d | 1,327 | — | — | Form 4 ↗ | ||
| KILCOYNE MOIRA A. | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,071 | — | — | Form 4 ↗ | ||
| MALLESCH EILEEN A | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,071 | — | — | Form 4 ↗ | ||
| MOCZARSKI ALEXANDER S | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,071 | — | — | Form 4 ↗ | ||
| Posner Brian S | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,071 | — | — | Form 4 ↗ | ||
| Triplett Neal F | Other A | May 5, 2026 | May 7, 2026 | 2d | 1,327 | — | — | Form 4 ↗ | ||
| Triplett Neal F | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,071 | — | — | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Alan Armstrong | Buy | March 27, 2026 | July 21, 2026 | 116d | — | — | $1,001–$15K | late | Senate PTR ↗ |
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Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| Senate eFD, periodic transaction reports | 1 | 1 | July 21, 2026 | July 21, 2026 | Senate eFD search |
| SEC EDGAR, Form 4 | 10 | 16 | May 7, 2026 | August 20, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.