ACGL Arch Capital Group Ltd.
Arch Capital Group Ltd. (ACGL) Institutional Ownership
What the institutions did with ACGL last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 10.4M | 16.5% |
| Allspring Global Investments Holdings, LLC | 4.5M | 7.1% |
| DIMENSIONAL FUND ADVISORS LP | 4.3M | 6.9% |
| High Ground Investment Management LLP | 2.7M | 4.4% |
| PRINCIPAL FINANCIAL GROUP INC | 2.4M | 3.9% |
| Robeco Institutional Asset Management B.V. | 2.3M | 3.6% |
| Amundi | 2.0M | 3.1% |
| Swedbank AB | 1.9M | 3.0% |
| COOKE & BIELER LP | 1.8M | 2.9% |
| DEUTSCHE BANK AG\ | 1.8M | 2.9% |
| Nuveen, LLC | 1.7M | 2.7% |
| FMR LLC | 1.6M | 2.6% |
| Thrivent Financial for Lutherans | 1.6M | 2.5% |
| Bank of New York Mellon Corp | 1.5M | 2.4% |
| BARCLAYS PLC | 1.2M | 1.9% |
| KBC Group NV | 1.1M | 1.7% |
| ASSETMARK, INC | 1.0M | 1.7% |
| Mitsubishi UFJ Asset Management Co., Ltd. | 900.5K | 1.4% |
| Sumitomo Mitsui Trust Group, Inc. | 853.3K | 1.4% |
| CITIGROUP INC | 810.0K | 1.3% |
| Squarepoint Ops LLC | 613.0K | 1.0% |
| GENERAL AMERICAN INVESTORS CO INC | 530.2K | 0.8% |
| PFA Pension, Forsikringsaktieselskab | 525.3K | 0.8% |
| STOREBRAND ASSET MANAGEMENT AS | 483.8K | 0.8% |
| ANCHOR CAPITAL ADVISORS LLC | 414.6K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| KBC Group NV | Increased | 529.4K | 1.1M | +563.2K |
| ANCHOR CAPITAL ADVISORS LLC | Reduced | 879.6K | 414.6K | -465.0K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 2.9M | 2.4M | -443.1K |
| COOKE & BIELER LP | Reduced | 2.2M | 1.8M | -387.8K |
| Squarepoint Ops LLC | Increased | 229.1K | 613.0K | +383.9K |
| DEUTSCHE BANK AG\ | Increased | 1.4M | 1.8M | +373.1K |
| Allspring Global Investments Holdings, LLC | Increased | 4.1M | 4.5M | +354.7K |
| AMF Tjanstepension AB | Increased | 43.0K | 351.9K | +308.9K |
| Gladstone Capital Management LLP | Reduced | 306.7K | 100 | -306.6K |
| ARGA Investment Management, LP | New | 0 | 288.6K | +288.6K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Reduced | 385.9K | 119.8K | -266.0K |
| CITIGROUP INC | Increased | 593.5K | 810.0K | +216.4K |
| Robeco Institutional Asset Management B.V. | Increased | 2.0M | 2.3M | +210.6K |
| BANK OF MONTREAL /CAN/ | Reduced | 537.8K | 349.5K | -188.4K |
| Smith Group Asset Management, LLC | Reduced | 442.7K | 274.1K | -168.6K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 10.5M | 10.4M | -155.8K |
| Russell Investments Group, Ltd. | Reduced | 477.4K | 342.0K | -135.4K |
| High Ground Investment Management LLP | Increased | 2.6M | 2.7M | +131.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 4.2M | 4.3M | +124.9K |
| Achmea Investment Management B.V. | New | 0 | 124.3K | +124.3K |
| JUPITER ASSET MANAGEMENT LTD | New | 0 | 114.6K | +114.6K |
| SCHWARTZ INVESTMENT COUNSEL INC | Reduced | 130.0K | 20.0K | -110.0K |
| Bank of New York Mellon Corp | Reduced | 1.6M | 1.5M | -88.5K |
| Fideuram Asset Management (Ireland) dac | Increased | 12.7K | 95.7K | +83.0K |
| Sumitomo Mitsui Trust Group, Inc. | Reduced | 934.3K | 853.3K | -81.0K |
| Assenagon Asset Management S.A. | Reduced | 100.1K | 25.3K | -74.8K |
| ASR Vermogensbeheer N.V. | Reduced | 222.5K | 150.1K | -72.3K |
| Thrivent Financial for Lutherans | Increased | 1.5M | 1.6M | +68.3K |
| NORDEA INVESTMENT MANAGEMENT AB | Increased | 39.6K | 107.9K | +68.3K |
| GREAT LAKES ADVISORS, LLC | Reduced | 282.9K | 216.0K | -67.0K |
| Cambridge Investment Research Advisors, Inc. | Reduced | 122.6K | 60.1K | -62.5K |
| Creative Planning | Increased | 115.0K | 176.9K | +61.9K |
| Rakuten Investment Management, Inc. | New | 0 | 61.0K | +61.0K |
| Arbejdsmarkedets Tillaegspension | Reduced | 314.2K | 258.9K | -55.3K |
| FMR LLC | Increased | 1.6M | 1.6M | +54.8K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 10.8K | 65.2K | +54.4K |
| DekaBank Deutsche Girozentrale | Reduced | 168.8K | 114.9K | -54.0K |
| Kinsale Capital Group, Inc. | Increased | 112.6K | 165.8K | +53.2K |
| Alberta Investment Management Corp | New | 0 | 52.1K | +52.1K |
| M&T Bank Corp | Reduced | 65.1K | 15.7K | -49.4K |
| Nuveen, LLC | Reduced | 1.8M | 1.7M | -47.7K |
| Mitsubishi UFJ Asset Management Co., Ltd. | Increased | 853.2K | 900.5K | +47.3K |
| Amundi | Reduced | 2.0M | 2.0M | -47.2K |
| BARCLAYS PLC | Reduced | 1.2M | 1.2M | -45.3K |
| DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD. | Sold Out | 44.0K | 0 | -44.0K |
| AustralianSuper Pty Ltd | Increased | 266.2K | 309.3K | +43.1K |
| FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUND | Reduced | 306.7K | 267.2K | -39.5K |
| EQUITABLE TRUST CO | Sold Out | 35.5K | 0 | -35.5K |
| DANSKE BANK A/S | Increased | 296.0K | 329.9K | +33.9K |
| Edgestream Partners, L.P. | Reduced | 35.8K | 3.1K | -32.7K |
| Aberdeen Group plc | Reduced | 315.8K | 283.7K | -32.1K |
| NATIXIS | Increased | 86.3K | 116.9K | +30.7K |
| IMC-Chicago, LLC | Increased | 2.4K | 31.0K | +28.6K |
| Swedbank AB | Increased | 1.9M | 1.9M | +25.5K |
| Wealthfront Advisers LLC | Reduced | 114.1K | 89.2K | -24.9K |
| Crestwood Advisors Group, LLC | Increased | 4.8K | 29.2K | +24.4K |
| Illinois Municipal Retirement Fund | Increased | 168.7K | 192.7K | +24.0K |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | Reduced | 273.9K | 250.2K | -23.7K |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. | Sold Out | 22.4K | 0 | -22.4K |
| DIVERSIFIED MANAGEMENT INC | New | 0 | 21.5K | +21.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.