Arch Capital Group Ltd.
ACGL- Exchange
- Nasdaq
- Industry
- Fire, Marine & Casualty Insurance
- SEC CIK
- 0000947484
In the last 90 days, Arch Capital Group Ltd. insiders filed 0 open-market purchases and 1 sale; 912 institutions reported holding it in 13F filings for Q2 2026, worth $30.3B in total; no superinvestor holds it.
Holders of 5% or more of ACGL
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Arch Capital Group Ltd., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 13G | 7.33%26.1M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on Arch Capital Group Ltd., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Apr 29, 202611:44 AM ET | Vanguard Capital Management LLC | 13G | 7.33%26.1M shares | New | Mar 31, 2026 | SEC |
| Mar 26, 20261:11 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 17, 20269:31 AM ET | Bamco Incand 3 others | 13G/A | 4.96%18.0M shares | −0.55 ppfrom 5.51%Below 5% | Dec 31, 2025 | SEC |
| Nov 14, 20249:51 AM ET | Bamco Incand 3 others | 13G/A | 5.51%20.7M shares | – | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Arch Capital Group Ltd. shares.
No Form 144 notices for Arch Capital Group Ltd. are on file.