Arch Capital Group Ltd.
Arch Capital Group Ltd. (ACGL) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ACGL · as of Sep 30, 2024
Ownership Breakdown
866
Institutional Holders
▲ 47 vs Q2
$37.15B
Total Inst. Value
▲ $3.73B vs Q2
349.39M
Shares Outstanding
freeFloat 96.37%
332.47M
13F Shares Held
▲ 1.15M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ACGL largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC fire, marine & casualty insurance | 41.82M | 11.21% | 11.21% | $4.68T | Nov 13, 2024 | ▲ 379.7K |
BLACKROCK, INC. fire, marine & casualty insurance | 33.28M | 8.92% | 8.92% | $3.72T | Nov 13, 2024 | NEW |
ARTISAN PARTNERS LIMITED PARTNERSHIP fire, marine & casualty insurance | 23.70M | 6.35% | 6.35% | $2.65T | Nov 12, 2024 | ▼ 614.8K |
BAMCO INC /NY/ fire, marine & casualty insurance | 20.73M | 5.55% | 5.55% | $2.32T | Nov 14, 2024 | ▼ 194.8K |
STATE STREET CORP fire, marine & casualty insurance | 16.59M | 4.44% | 4.44% | $1.86T | Nov 14, 2024 | ▲ 172.6K |
WCM INVESTMENT MANAGEMENT, LLC fire, marine & casualty insurance | 13.93M | 3.73% | 3.73% | $1.58T | Nov 4, 2024 | ▼ 50.0K |
GEODE CAPITAL MANAGEMENT, LLC fire, marine & casualty insurance | 10.83M | 2.90% | 2.90% | $1.21T | Nov 12, 2024 | ▲ 253.6K |
PRINCIPAL FINANCIAL GROUP INC fire, marine & casualty insurance | 7.44M | 1.99% | 1.99% | $832.25B | Oct 31, 2024 | ▲ 337.8K |
JPMORGAN CHASE & CO fire, marine & casualty insurance | 5.97M | 1.60% | 1.60% | $667.56B | Dec 26, 2024 | ▼ 243.5K |
ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC fire, marine & casualty insurance | 5.12M | 1.37% | 1.37% | $573.30B | Oct 18, 2024 | ▲ 49.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
27
Increased
+6.28M shares1
New Positions
first time holders21
Decreased
−6.21M shares0
Sold Out
fully exitedNet shares change (top 50)
+74.5K
+6.28M / −6.21M
Net new holders
+7
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ACGL insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
17
Buy transactions
2
Sell transactions
8.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Posner Brian S director | Jun 3, 2026 | Sale | 3,000 | $19.66 | $59.0K | 0 | Form 4 ↗ |
Posner Brian S director | May 11, 2026 | Sale | 2,000 | $17.14 | $34.3K | 0 | Form 4 ↗ |
Triplett Neal F director | May 5, 2026 | Award | 1,327 | — | — | 8.0K | Form 4 ↗ |
Triplett Neal F director | May 5, 2026 | Award | 2,071 | — | — | 6.7K | Form 4 ↗ |
Posner Brian S director | May 5, 2026 | Award | 2,071 | — | — | 122.2K | Form 4 ↗ |
MOCZARSKI ALEXANDER S director | May 5, 2026 | Award | 2,071 | — | — | 4.0K | Form 4 ↗ |
MALLESCH EILEEN A director | May 5, 2026 | Award | 2,071 | — | — | 13.8K | Form 4 ↗ |
KILCOYNE MOIRA A. director | May 5, 2026 | Award | 1,327 | — | — | 35.8K | Form 4 ↗ |
KILCOYNE MOIRA A. director | May 5, 2026 | Award | 2,071 | — | — | 34.5K | Form 4 ↗ |
Houston Daniel Joseph director | May 5, 2026 | Award | 1,327 | — | — | 13.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Arch Capital Group Ltd. (ACGL) is primarily owned by institutional investors, who hold approximately 95.2% of total shares outstanding. Company insiders own approximately 3.63%, while retail and public investors account for the remaining 1.21%.
The largest institutional shareholder of Arch Capital Group Ltd. is VANGUARD GROUP INC, holding approximately 41.82 million shares — equal to 11.21% of outstanding shares — as of September 30, 2024.
A total of 866 institutional investors currently hold ACGL stock, with a combined institutional value of approximately $37.15 billion as of the most recent 13F filing period.
Frequently asked questions
ACGL ownershipArch Capital Group Ltd. (ACGL) is primarily owned by institutional investors, who hold approximately 95.2% of shares. The largest shareholder is VANGUARD GROUP INC with a 11.21% stake. Company insiders hold 3.63%. Data sourced from SEC Form 13F as of September 30, 2024.