ARCH CAPITAL GROUP LTD. ACGL
CIK 0000947484 · CUSIP G0450A105
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | VANGUARD GROUP INC CIK 102909 · View history | $3.88B 41,999,603 shares | 0.07% | +182.15K(+0.4%)Added | SEC filing ↗ Feb 11, 2025 | ▾ |
| 02 | BlackRock, Inc. CIK 2012383 · View history | $3.07B 33,243,455 shares | 0.06% | -41.11K(-0.1%)Reduced | SEC filing ↗ Feb 7, 2025 | ▾ |
| 03 | Artisan Partners Limited Partnership CIK 1466153 · View history | $2.16B 23,390,647 shares | 3.33% | -313.47K(-1.3%)Reduced | SEC filing ↗ Feb 12, 2025 | ▾ |
| 04 | BAMCO INC /NY/ CIK 1017918 · View history | $1.89B 20,462,724 shares | 4.88% | -262.63K(-1.3%)Reduced | SEC filing ↗ Feb 14, 2025 | ▾ |
| 05 | STATE STREET CORP CIK 93751 · View history | $1.57B 16,990,012 shares | 0.06% | +402.57K(+2.4%)Added | SEC filing ↗ Feb 14, 2025 | ▾ |
| 06 | WCM INVESTMENT MANAGEMENT, LLC CIK 1061186 · Amended · View history | $1.23B 13,426,213 shares | 2.90% | -507.29K(-3.6%)Reduced | SEC filing ↗ Jan 28, 2025 | ▾ |
| 07 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $1.01B 11,010,756 shares | 0.08% | +180.49K(+1.7%)Added | SEC filing ↗ Feb 12, 2025 | ▾ |
| 08 | PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history | $759.32M 8,222,244 shares | 0.41% | +783.51K(+10.5%)Added | SEC filing ↗ Jan 31, 2025 | ▾ |
| 09 | JPMORGAN CHASE & CO CIK 19617 · View history | $528.86M 5,726,646 shares | 0.04% | -240.14K(-4.0%)Reduced | SEC filing ↗ Feb 12, 2025 | ▾ |
| 10 | Allspring Global Investments Holdings, LLC CIK 1890906 · View history | $488.99M 5,350,868 shares | 0.78% | +226.62K(+4.4%)Added | SEC filing ↗ Jan 29, 2025 | ▾ |
| 11 | Nuveen Asset Management, LLC CIK 1521019 · View history | $451.50M 4,888,997 shares | 0.13% | +93.23K(+1.9%)Added | SEC filing ↗ Feb 14, 2025 | ▾ |
| 12 | NORTHERN TRUST CORP CIK 73124 · View history | $448.90M 4,860,804 shares | 0.06% | +495.26K(+11.3%)Added | SEC filing ↗ Feb 14, 2025 | ▾ |
| 13 | Capital International Investors CIK 1562230 · View history | $448.45M 4,855,977 shares | 0.08% | -22.21K(-0.5%)Reduced | SEC filing ↗ Feb 13, 2025 | ▾ |
| 14 | NORGES BANK CIK 1374170 · View history | $437.29M 4,735,145 shares | 0.06% | +84.04K(+1.8%)Added | SEC filing ↗ Feb 12, 2025 | ▾ |
| 15 | Madison Asset Management, LLC CIK 1299351 · View history | $410.01M 4,439,745 shares | 4.62% | +226.23K(+5.4%)Added | SEC filing ↗ Feb 10, 2025 | ▾ |
| 16 | Madison Investment Advisors, LLC CIK 1507115 · Amended · View history | $410.01M 4,439,745 shares | 4.62% | — | SEC filing ↗ Feb 10, 2025 | ▾ |
| 17 | MORGAN STANLEY CIK 895421 · Amended · View history | $404.21M 4,376,929 shares | 0.03% | +21.25K(+0.5%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 18 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $383.32M 4,150,824 shares | 0.09% | +185.84K(+4.7%)Added | SEC filing ↗ Feb 13, 2025 | ▾ |
| 19 | Invesco Ltd. CIK 914208 · View history | $379.13M 4,105,410 shares | 0.07% | -563.56K(-12.1%)Reduced | SEC filing ↗ Feb 13, 2025 | ▾ |
| 20 | Egerton Capital (UK) LLP CIK 1581811 · View history | $368.29M 3,987,972 shares | 4.26% | +816.75K(+25.8%)Added | SEC filing ↗ Feb 10, 2025 | ▾ |
Showing 20 / 844 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 844 reporting institutions.
This page includes 20 of 844 reporting institutions. Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
＋ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 844 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP.
MCP https://api.akkrudata.ai/mcp
get_institutional_security_holders
{"cusip":"G0450A105","quarter":"2024Q4","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.