AFFILIATED MANAGERS GROUP IN AMG
COM · Common Stock · CUSIP 008252108 · ISIN US0082521081
Global investment management company
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($19.9m this quarter). Holder counts are more reliable. Shares outstanding: 28.4m as of 2025-05-06, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $168.01. Options: 7 managers hold calls ($6.1m notional), 4 hold puts ($974.6k).
Trends to Q1 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 331 |
| Q4 2022 | 368 |
| Q1 2023 | 389 |
| Q2 2023 | 382 |
| Q3 2023 | 362 |
| Q4 2023 | 388 |
| Q1 2024 | 405 |
| Q2 2024 | 408 |
| Q3 2024 | 423 |
| Q4 2024 | 409 |
| Q1 2025 | 397 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2023 | 147 | 214 |
| Q3 2023 | 150 | 204 |
| Q4 2023 | 182 | 163 |
| Q1 2024 | 176 | 187 |
| Q2 2024 | 183 | 206 |
| Q3 2024 | 202 | 186 |
| Q4 2024 | 156 | 224 |
| Q1 2025 | 147 | 216 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2024 | $1.2m | $5.3m | 4.41 |
| Q3 2024 | $1.9m | $4.8m | 2.46 |
| Q4 2024 | $1.5m | $3.3m | 2.23 |
| Q1 2025 | $6.1m | $974.6k | 0.16 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +960.2k |
| Verition Fund Management LLC | Added | +53.4k |
| LSV ASSET MANAGEMENT | Added | +44.1k |
| VOYA INVESTMENT MANAGEMENT LLC | Added | +38.5k |
| NORTHERN TRUST CORP | Added | +35.7k |
| Brandywine Global Investment Management, LLC | Added | +27.2k |
| Invenomic Capital Management LP | New | +26.0k |
| HRT FINANCIAL LP | Added | +25.9k |
| North Reef Capital Management LP | Added | +22.6k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +21.2k |
Biggest sellers
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | Reduced | -222.7k |
| VANGUARD GROUP INC | Reduced | -217.3k |
| Invesco Ltd. | Reduced | -133.4k |
| LGT CAPITAL PARTNERS LTD. | Reduced | -76.9k |
| Channing Capital Management, LLC | Reduced | -70.4k |
| Penn Capital Management Company, LLC | Reduced | -68.6k |
| NEW YORK STATE COMMON RETIREMENT FUND | Reduced | -66.6k |
| Kiltearn Partners LLP | Reduced | -55.2k |
| Assenagon Asset Management S.A. | Sold out | -52.4k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -51.8k |
Biggest calls
| PUFF WEALTH MANAGEMENT, LLC | New | $3.2m18.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.0m6.1k shares |
| WOLVERINE TRADING, LLC | New | $668.8k4.0k shares |
| Walleye Trading LLC | Added | $436.9k2.6k shares |
| CITADEL ADVISORS LLC | Reduced | $420.1k2.5k shares |
| Twin Tree Management, LP | New | $403.3k2.4k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| Walleye Trading LLC | Added | $638.5k3.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $235.2k1.4k shares |
| CITADEL ADVISORS LLC | New | $100.8k600 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-28 | 5.1% |
Fell to 5% or below in the last year: MORGAN STANLEY (5.5%, 2026-08-12), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC), Clarkston Capital Partners, LLC (3.2%, 2026-02-13)
Insider purchases and sales in Q1 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2023 | 0 | — | 0 | — | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 3 | $5.4m | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
None reported in Q1 2025.
Holders, Q1 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.01% of their portfolio | 3.0m $503.2m | Reduced -217.3k |
| BlackRock, Inc. 0.01% of their portfolio | 2.9m $493.3m | Reduced -33.6k |
| MORGAN STANLEY 0.03% of their portfolio | 2.3m $385.6m | Added +14.6k |
| Clarkston Capital Partners, LLC 5.26% of their portfolio | 1.6m $266.4m | Added +13.1k |
| ARIEL INVESTMENTS, LLC 2.78% of their portfolio | 1.4m $236.4m | Reduced -16.8k |
| MILLENNIUM MANAGEMENT LLC 0.21% of their portfolio | 1.3m $212.7m | Added +960.2k |
| Boston Partners 0.23% of their portfolio | 1.2m $194.0m | Reduced -29.3k |
| STATE STREET CORP 0.01% of their portfolio | 997.9k $167.7m | Reduced -24.7k |
| DIMENSIONAL FUND ADVISORS LP 0.03% of their portfolio | 709.4k $119.2m | Reduced -51.8k |
| LYRICAL ASSET MANAGEMENT LP 1.55% of their portfolio | 606.2k $101.9m | Reduced -11.9k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.36% of their portfolio | 555.2k $93.3m | Added +1.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 542.7k $91.2m | Added +21.2k |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ 4.30% of their portfolio | 479.8k $80.6m | Reduced -222.7k |
| LSV ASSET MANAGEMENT 0.19% of their portfolio | 468.1k $78.7m | Added +44.1k |
| Channing Capital Management, LLC 2.25% of their portfolio | 444.2k $74.6m | Reduced -70.4k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 385.3k $64.7m | Added +35.7k |
| CITADEL ADVISORS LLC 0.06% of their portfolio | 354.8k $59.6m | Added +3.8k |
| NORGES BANK 0.01% of their portfolio | 352.7k $59.3m | Reduced -18.7k |
| Kiltearn Partners LLP 10.43% of their portfolio | 325.6k $54.7m | Reduced -55.2k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 318.5k $53.5m | Reduced -12.6k |
| Allianz Asset Management GmbH 0.08% of their portfolio | 309.5k $52.0m | Reduced -34.2k |
| BRUNI J V & CO /CO 5.81% of their portfolio | 297.6k $50.0m | Reduced -4.2k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 277.1k $46.6m | Reduced -3.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 233.0k $39.1m | Added +5.7k |
| FMR LLC 0.00% of their portfolio | 202.6k $34.0m | Reduced -10.8k |
| FIRST TRUST ADVISORS LP 0.03% of their portfolio | 198.6k $33.4m | Reduced -18.9k |
| LGT CAPITAL PARTNERS LTD. 1.47% of their portfolio | 197.1k $33.1m | Reduced -76.9k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 196.6k $33.0m | Added +10.5k |
| Fisher Asset Management, LLC 0.01% of their portfolio | 168.8k $28.4m | Added +12.6k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.11% of their portfolio | 165.7k $27.8m | Reduced -5.5k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 146.6k $24.6m | Reduced -17.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 141.7k $23.8m | Added +6.3k |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 134.8k $22.7m | Added +16.2k |
| Invesco Ltd. 0.00% of their portfolio | 134.4k $22.6m | Reduced -133.4k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.03% of their portfolio | 126.0k $21.2m | Reduced -66.6k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 125.0k $21.0m | Reduced -30.8k |
| UBS Group AG 0.00% of their portfolio | 120.7k $20.3m | Reduced -18.9k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 113.4k $19.0m | Added +1.4k |
| GREAT LAKES ADVISORS, LLC 0.16% of their portfolio | 106.3k $17.9m | Reduced -3.7k |
| NORTH STAR ASSET MANAGEMENT INC 0.78% of their portfolio | 102.1k $17.2m | Added +223 |
| Retirement Systems of Alabama 0.06% of their portfolio | 98.1k $16.5m | Reduced -1.1k |
| Nuveen, LLC 0.00% of their portfolio | 95.6k $16.1m | First filing |
| MACQUARIE GROUP LTD 0.02% of their portfolio | 88.1k $14.8m | Reduced -526 |
| BARCLAYS PLC 0.01% of their portfolio | 88.0k $14.8m | Reduced -1.8k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 81.9k $13.8m | Reduced -3.7k |
| Bridgewater Associates, LP 0.06% of their portfolio | 81.1k $13.6m | Added +11.2k |
| Goodman Financial Corp 2.93% of their portfolio | 80.8k $13.6m | Added +1.3k |
| BASSWOOD CAPITAL MANAGEMENT, L.L.C. 0.75% of their portfolio | 79.0k $13.3m | Reduced -45.2k |
| Brandywine Global Investment Management, LLC 0.09% of their portfolio | 76.3k $12.8m | Added +27.2k |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 74.2k $12.5m | Reduced -4.2k |
| REINHART PARTNERS, LLC. 0.43% of their portfolio | 70.2k $11.8m | Reduced -4.6k |
| ALGERT GLOBAL LLC 0.29% of their portfolio | 69.2k $11.6m | Reduced -35.1k |
| Man Group plc 0.03% of their portfolio | 68.2k $11.5m | Added +1.2k |
| Wallace Capital Management Inc. 1.45% of their portfolio | 67.5k $11.3m | Reduced -484 |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 67.4k $11.3m | Reduced -1.9k |
| California Public Employees Retirement System 0.01% of their portfolio | 67.1k $11.3m | Reduced -921 |
| Cambria Investment Management, L.P. 0.77% of their portfolio | 65.9k $11.1m | Reduced -6.7k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 59.2k $10.0m | Added +3.0k |
| Swiss National Bank 0.01% of their portfolio | 58.6k $9.8m | Unchanged |
| VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio | 57.4k $9.6m | Added +38.5k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 55.6k $9.3m | Added +8.0k |
| Verition Fund Management LLC 0.05% of their portfolio | 54.6k $9.2m | Added +53.4k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 53.7k $9.0m | Added +8.4k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 53.2k $8.9m | Reduced -16.9k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 52.9k $8.9m | Reduced -29.7k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 52.5k $8.8m | Reduced -10.1k |
| North Reef Capital Management LP 0.36% of their portfolio | 50.0k $8.4m | Added +22.6k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 48.7k $8.2m | Added +1.1k |
| Legal & General Group Plc 0.00% of their portfolio | 48.6k $8.2m | Added +1.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 47.0k $7.9m | Added +1.6k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio | 43.3k $7.3m | Reduced -9.4k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.01% of their portfolio | 43.2k $7.3m | Reduced -670 |
| Treasurer of the State of North Carolina 0.03% of their portfolio | 42.8k $7.2m | Reduced -2.5k |
| NORDEA INVESTMENT MANAGEMENT AB 0.01% of their portfolio | 42.3k $7.0m | Reduced -724 |
| Polar Capital Holdings Plc 0.04% of their portfolio | 38.9k $6.5m | Reduced -17.6k |
| STOREBRAND ASSET MANAGEMENT AS 0.02% of their portfolio | 38.6k $6.5m | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 37.9k $6.4m | Reduced -1.6k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 37.1k $6.2m | Reduced -4.1k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 36.6k $6.2m | Reduced -1.2k |
| Calamos Advisors LLC 0.03% of their portfolio | 35.4k $6.0m | Unchanged |
| Corebridge Financial, Inc. 0.03% of their portfolio | 32.3k $5.4m | Reduced -1.9k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 30.2k $5.1m | Added +342 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.02% of their portfolio | 29.6k $5.0m | Reduced -3.9k |
| ASSETMARK, INC 0.01% of their portfolio | 28.6k $4.8m | Reduced -146 |
| HRT FINANCIAL LP 0.03% of their portfolio | 27.6k $4.6m | Added +25.9k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 27.5k $4.6m | Reduced -311 |
| Sterling Capital Management LLC 0.07% of their portfolio | 26.3k $4.4m | Reduced -220 |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 26.1k $4.4m | Reduced -1.8k |
| Invenomic Capital Management LP 0.22% of their portfolio | 26.0k $4.4m | New |
| Grantham, Mayo, Van Otterloo & Co. LLC 0.01% of their portfolio | 25.4k $4.3m | Added +1.1k |
| Quantinno Capital Management LP 0.03% of their portfolio | 25.1k $4.2m | Added +10.4k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 24.9k $4.2m | Unchanged |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.01% of their portfolio | 23.5k $4.0m | Unchanged |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 23.1k $3.9m | Reduced -900 |
| NICOLA WEALTH MANAGEMENT LTD. 0.36% of their portfolio | 22.0k $3.7m | Added +6.0k |
| Amundi 0.00% of their portfolio | 20.5k $3.2m | Added +218 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 19.6k $3.3m | Reduced -2.7k |
| State of Alaska, Department of Revenue 0.04% of their portfolio | 18.4k $3.1m | Reduced -20 |
| Poehling Capital Management, INC. 0.78% of their portfolio | 18.4k $3.1m | Reduced -57 |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 18.4k $3.1m | Added +519 |