Affiliated Managers Group, Inc.
AMG- Exchange
- NYSE
- Industry
- Investment Advice
- SEC CIK
- 0001004434
No open-market purchases or sales by Affiliated Managers Group, Inc. insiders were filed in the last 90 days; 567 institutions reported holding it in 13F filings for Q2 2026, worth $8.53B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in Affiliated Managers Group, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 451
- +26 vs. Q2 2025
- Shares held
- 26.5M
- +5.51K (0.0%) vs. Q2 2025
- Total value
- $6.32B
- +$1.11B (+21.2%) vs. Q2 2025
- New holders
- 61
- 141 more added
- Sold out
- 35
- 163 more reduced
7 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting AMG on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 567 | $8.53B |
| Q1 2026 | 548 | $6.88B |
| Q4 2025 | 511 | $7.47B |
| Q3 2025 | 451 | $6.32B |
| Q2 2025 | 432 | $5.28B |
| Q1 2025 | 396 | $4.65B |
| Q4 2024 | 408 | $5.21B |
| Q3 2024 | 422 | $5.04B |
| Q2 2024 | 407 | $4.57B |
| Q1 2024 | 403 | $5.10B |
| Q4 2023 | 386 | $4.77B |
| Q3 2023 | 360 | $4.16B |
| Q2 2023 | 381 | $4.94B |
| Q1 2023 | 388 | $4.92B |
| Q4 2022 | 367 | $5.50B |
| Q3 2022 | 329 | $4.06B |
| Q2 2022 | 311 | $4.33B |
| Q1 2022 | 335 | $5.32B |
| Q4 2021 | 365 | $6.45B |
| Q3 2021 | 335 | $6.04B |
| Q2 2021 | 340 | $6.34B |
| Q1 2021 | 320 | $6.28B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Affiliated Managers Group, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Nuveen, LLC | 72,675 | $17.3M | 0.00% | +4,089+6.0% | Added |
| Los Angeles Capital Management LLC | 72,965 | $17.4M | 0.06% | 00.0% | Unchanged |
| Polar Capital Holdings Plc | 78,523 | $18.7M | 0.09% | +39,050+98.9% | Added |
| Man Group plc | 78,984 | $18.8M | 0.04% | +4,907+6.6% | Added |
| Goodman Financial Corp | 80,261 | $19.1M | 3.73% | −1,995−2.4% | Reduced |
| Rhumbline Advisers | 81,059 | $19.3M | 0.02% | +2,458+3.1% | Added |
| Royal Bank of Canada | 81,119 | $19.3M | 0.00% | +62,420+333.8% | Added |
| North Star Asset Management Inc | 85,334 | $20.3M | 0.83% | −16,747−16.4% | Reduced |
| Macquarie Group Ltd | 87,601 | $20.9M | 0.02% | −1,869−2.1% | Reduced |
| Treasurer of the State of North Carolina | 95,458 | $22.8M | 0.07% | −719−0.7% | Reduced |
| Invesco Ltd. | 96,721 | $23.1M | 0.00% | +14,460+17.6% | Added |
| Retirement Systems of Alabama | 96,837 | $23.1M | 0.08% | −395−0.4% | Reduced |
| SEI Investments Co | 97,874 | $23.3M | 0.03% | +37,202+61.3% | Added |
| Caisse de Depot Et Placement du Quebec | 100,948 | $24.1M | 0.04% | +98,601+4,201.2% | Added |
| UBS Asset Management Americas Inc | 112,639 | $26.9M | 0.01% | −47,638−29.7% | Reduced |
| Alliancebernstein L.P. | 114,979 | $27.4M | 0.01% | +74,126+181.4% | Added |
| New York State Common Retirement Fund | 124,562 | $29.7M | 0.04% | −1,853−1.5% | Reduced |
| JPMorgan Chase & Co | 125,643 | $30.0M | 0.00% | −13,222−9.5% | Reduced |
| Goldman Sachs Group Inc | 126,079 | $30.1M | 0.00% | +4,975+4.1% | Added |
| Victory Capital Management Inc | 134,456 | $32.1M | 0.02% | +27,111+25.3% | Added |
| First Trust Advisors LP | 161,478 | $38.5M | 0.03% | −73,201−31.2% | Reduced |
| FMR LLC | 183,705 | $43.8M | 0.00% | −2,280−1.2% | Reduced |
| Bank of America Corp | 184,726 | $44.0M | 0.00% | +860.0% | Added |
| Raymond James Financial Inc | 192,886 | $46.0M | 0.01% | +75,139+63.8% | Added |
| Fisher Asset Management, LLC | 203,723 | $48.6M | 0.02% | +35,349+21.0% | Added |
| Bank of New York Mellon Corp | 244,143 | $58.2M | 0.01% | −11,636−4.5% | Reduced |
| Price T Rowe Associates Inc | 244,253 | $58.2M | 0.01% | +10,173+4.3% | Added |
| Holocene Advisors, LP | 253,935 | $60.5M | 0.14% | +152,982+151.5% | Added |
| Bruni J V & Co | 254,989 | $60.8M | 6.14% | −38,746−13.2% | Reduced |
| Kiltearn Partners LLP | 283,814 | $67.7M | 13.56% | −16,300−5.4% | Reduced |
| Alyeska Investment Group, L.P. | 295,081 | $70.4M | 0.21% | +295,081 | New |
| Charles Schwab Investment Management Inc | 312,568 | $74.5M | 0.01% | +1,201+0.4% | Added |
| Northern Trust Corp | 334,368 | $79.7M | 0.01% | −783−0.2% | Reduced |
| Balyasny Asset Management LLC | 336,063 | $80.1M | 0.16% | +24,680+7.9% | Added |
| UBS Group AG | 350,212 | $83.5M | 0.02% | +172,771+97.4% | Added |
| Allianz Asset Management GmbH | 393,161 | $93.7M | 0.12% | +50,219+14.6% | Added |
| Channing Capital Management, LLC | 425,037 | $101.3M | 2.67% | −5,427−1.3% | Reduced |
| LSV Asset Management | 479,624 | $114.4M | 0.25% | +3,400+0.7% | Added |
| Geode Capital Management, LLC | 509,831 | $121.6M | 0.01% | +5,473+1.1% | Added |
| Fuller & Thaler Asset Management, Inc. | 570,275 | $136.0M | 0.46% | −582−0.1% | Reduced |
| Lyrical Asset Management LP | 579,835 | $138.3M | 1.95% | +40,795+7.6% | Added |
| Citadel Advisors LLC | 645,141 | $153.8M | 0.12% | +5,353+0.8% | Added |
| Dimensional Fund Advisors LP | 684,116 | $163.1M | 0.04% | +7,891+1.2% | Added |
| State Street Corp | 963,708 | $229.8M | 0.01% | −17,181−1.8% | Reduced |
| Millennium Management LLC | 1,017,113 | $242.5M | 0.19% | −552,213−35.2% | Reduced |
| Boston Partners | 1,157,344 | $276.0M | 0.28% | +24,217+2.1% | Added |
| Clarkston Capital Partners, LLC | 1,232,333 | $293.8M | 6.33% | −203,021−14.1% | Reduced |
| Ariel Investments, LLC | 1,263,824 | $301.3M | 3.22% | −91,251−6.7% | Reduced |
| Morgan Stanley | 1,941,518 | $462.9M | 0.03% | −75,976−3.8% | Reduced |
| Vanguard Group Inc | 2,772,278 | $661.0M | 0.01% | −39,836−1.4% | Reduced |
| BlackRock, Inc. | 2,821,855 | $672.8M | 0.01% | −8450.0% | Reduced |
| Invenomic Capital Management LP | 0 | $0 | 0.00% | −22,398−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −18,940−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −16,498−100.0% | Sold out |
| Basswood Capital Management, L.L.C. | 0 | $0 | 0.00% | −15,955−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −12,013−100.0% | Sold out |
| Natixis Advisors, L.P. | 0 | $0 | 0.00% | −11,902−100.0% | Sold out |
| Point72 Europe (London) LLP | 0 | $0 | 0.00% | −10,838−100.0% | Sold out |
| Bastion Asset Management Inc. | 0 | $0 | 0.00% | −9,808−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −7,939−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −4,657−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −4,221−100.0% | Sold out |
| Mission Wealth Management, LP | 0 | $0 | 0.00% | −3,443−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −3,371−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −2,986−100.0% | Sold out |
| Lecap Asset Management Ltd | 0 | $0 | 0.00% | −2,509−100.0% | Sold out |
| ISAM Funds (UK) Ltd | 0 | $0 | 0.00% | −2,473−100.0% | Sold out |
| Ontario Teachers Pension Plan Board | 0 | $0 | 0.00% | −2,139−100.0% | Sold out |
| Aviva PLC | 0 | $0 | 0.00% | −2,085−100.0% | Sold out |
| CenterBook Partners LP | 0 | $0 | 0.00% | −2,063−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −1,859−100.0% | Sold out |
| Impact Partnership Wealth, LLC | 0 | $0 | 0.00% | −1,475−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −1,448−100.0% | Sold out |
| QRG Capital Management, Inc. | 0 | $0 | 0.00% | −1,366−100.0% | Sold out |
| Petrus Trust Company, LTA | 0 | $0 | 0.00% | −1,315−100.0% | Sold out |
| Susquehanna Fundamental Investments, LLC | 0 | $0 | 0.00% | −1,200−100.0% | Sold out |
| Lido Advisors, LLC | 0 | $0 | 0.00% | −1,180−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −1,110−100.0% | Sold out |
| Wilkinson Global Asset Management LLC | 0 | $0 | 0.00% | −1,065−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −388−100.0% | Sold out |
| Decker Retirement Planning Inc. | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| Ameritas Advisory Services, LLC | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Trifecta Capital Advisors, LLC | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Whipplewood Advisors, LLC | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Norges Bank | – | – | – | – | Not filed |
| Congress Wealth Management LLC | – | – | – | – | Not filed |
| Forte Capital LLC | – | – | – | – | Not filed |
| EP Wealth Advisors, LLC | – | – | – | – | Not filed |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |
| Capital A Wealth Management, LLC | – | – | – | – | Not filed |
| Parkworth Wealth Management, Inc. | – | – | – | – | Not filed |