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 ($23.6m this quarter). Holder counts are more reliable. Shares outstanding: 25.9m as of 2026-08-05, 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 ≈ $337.63. Options: 9 managers hold calls ($30.6m notional), 8 hold puts ($22.1m).
Trends to Q2 2026
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 |
| Q2 2025 | 434 |
| Q3 2025 | 450 |
| Q4 2025 | 509 |
| Q1 2026 | 547 |
| Q2 2026 | 565 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 202 | 186 |
| Q4 2024 | 156 | 224 |
| Q1 2025 | 147 | 216 |
| Q2 2025 | 190 | 221 |
| Q3 2025 | 200 | 197 |
| Q4 2025 | 222 | 201 |
| Q1 2026 | 297 | 185 |
| Q2 2026 | 233 | 267 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $4.1m | $3.1m | 0.76 |
| Q4 2025 | $19.3m | $2.7m | 0.14 |
| Q1 2026 | $10.5m | $14.2m | 1.35 |
| Q2 2026 | $30.6m | $22.1m | 0.72 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +869.7k |
| Qube Research & Technologies Ltd | Added | +114.5k |
| FULLER & THALER ASSET MANAGEMENT, INC. | Added | +97.5k |
| GOLDMAN SACHS GROUP INC | Added | +73.0k |
| Zurich Insurance Group Ltd/FI | New | +71.3k |
| Capricorn Fund Managers Ltd | New | +69.0k |
| Invesco Ltd. | Added | +64.1k |
| LSV ASSET MANAGEMENT | Added | +56.8k |
| JANE STREET GROUP, LLC | Added | +56.6k |
| UBS Group AG | Added | +46.7k |
Biggest sellers
| MORGAN STANLEY | Reduced | -245.3k |
| Artisan Partners Limited Partnership | Sold out | -173.6k |
| Woodline Partners LP | Sold out | -145.9k |
| BlackRock, Inc. | Reduced | -94.9k |
| Clarkston Capital Partners, LLC | Reduced | -85.0k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | -76.8k |
| Man Group plc | Reduced | -66.5k |
| ARIEL INVESTMENTS, LLC | Reduced | -64.4k |
| Russell Investments Group, Ltd. | Reduced | -62.4k |
| Prana Capital Management, LP | Sold out | -61.5k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $8.7m25.7k shares |
| Parallax Volatility Advisers, L.P. | New | $8.5m25.0k shares |
| JANE STREET GROUP, LLC | Added | $5.8m17.0k shares |
| CITADEL ADVISORS LLC | Reduced | $3.0m9.0k shares |
| Walleye Trading LLC | New | $2.3m6.9k shares |
| BARCLAYS PLC | New | $1.5m4.3k shares |
| IMC-Chicago, LLC | New | $744.5k2.2k shares |
| SIMPLEX TRADING, LLC | New | $67.7k200 shares |
| Walleye Capital LLC | New | $67.7k200 shares |
Biggest puts
| JANE STREET GROUP, LLC | Added | $13.5m39.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $4.6m13.5k shares |
| CITADEL ADVISORS LLC | Reduced | $1.7m5.1k shares |
| BARCLAYS PLC | New | $1.5m4.3k shares |
| SIMPLEX TRADING, LLC | Unchanged | $406.1k1.2k shares |
| IMC-Chicago, LLC | New | $338.4k1.0k shares |
| Walleye Capital LLC | Reduced | $101.5k300 shares |
| Walleye Trading LLC | Reduced | $67.7k200 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 since 1 Apr 2026
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 |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 1 | $3.7m | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 2 | $2.9m | — |
| Q2 2026 | 2 | $687.4k | 3 | $7.3m | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-06-08 | Horgen Jay C. President and CEO, director | Sold | $5.9m17.5k shares |
| 2026-06-01 | FRANQUI ANNETTE Director | Bought | $228.7k750 shares |
| 2026-05-08 | Matos Rodriguez Felix V. Director | Sold | $300.2k1.0k shares |
| 2026-05-06 | Ryan David Christopher Director | Sold | $1.0m3.4k shares |
| 2026-05-06 | Cates G. Staley Director | Bought | $458.7k1.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 2.8m $938.3m | Reduced -94.9k |
| MORGAN STANLEY 0.03% of their portfolio | 1.5m $503.3m | Reduced -245.3k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.02% of their portfolio | 1.4m $471.0m | Added +32.0k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 1.2m $389.5m | Reduced -23.7k |
| Boston Partners 0.30% of their portfolio | 1.0m $339.1m | Added +30.7k |
| ARIEL INVESTMENTS, LLC 3.37% of their portfolio | 999.7k $338.3m | Reduced -64.4k |
| STATE STREET CORP 0.01% of their portfolio | 883.3k $298.9m | Reduced -43.4k |
| MILLENNIUM MANAGEMENT LLC 0.20% of their portfolio | 875.1k $296.1m | Added +869.7k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.79% of their portfolio | 857.8k $290.3m | Added +97.5k |
| DIMENSIONAL FUND ADVISORS LP 0.04% of their portfolio | 670.2k $226.8m | Reduced -48.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 590.8k $200.0m | Reduced -45.0k |
| LSV ASSET MANAGEMENT 0.33% of their portfolio | 533.6k $180.6m | Added +56.8k |
| Allianz Asset Management GmbH 0.16% of their portfolio | 479.6k $152.9m | Reduced -9.1k |
| LYRICAL ASSET MANAGEMENT LP 2.03% of their portfolio | 472.9k $160.0m | Reduced -29.2k |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 432.4k $146.3m | Added +22.8k |
| Invesco Ltd. 0.01% of their portfolio | 380.6k $128.8m | Added +64.1k |
| NORGES BANK 0.01% of their portfolio | 361.5k $122.3m | Not comparable |
| NORTHERN TRUST CORP 0.01% of their portfolio | 322.7k $109.2m | Reduced -26.2k |
| JANE STREET GROUP, LLC 0.07% of their portfolio | 309.1k $104.6m | Added +56.6k |
| Channing Capital Management, LLC 2.36% of their portfolio | 302.5k $102.4m | Reduced -158 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 287.8k $97.4m | Reduced -20.2k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 282.0k $95.4m | Reduced -18.3k |
| Qube Research & Technologies Ltd 0.10% of their portfolio | 268.7k $90.9m | Added +114.5k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 258.3k $87.4m | Added +73.0k |
| Fisher Asset Management, LLC 0.02% of their portfolio | 246.5k $83.4m | Reduced -6.8k |
| RAYMOND JAMES FINANCIAL INC 0.02% of their portfolio | 239.2k $81.0m | Added +7.8k |
| Clarkston Capital Partners, LLC 6.54% of their portfolio | 228.7k $77.4m | Reduced -85.0k |
| BRUNI J V & CO /CO 6.49% of their portfolio | 210.1k $71.1m | Reduced -39.7k |
| CITADEL ADVISORS LLC 0.04% of their portfolio | 198.5k $67.2m | Reduced -48.7k |
| ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio | 189.7k $52.5m | Reduced -16.4k |
| Kiltearn Partners LLP 15.16% of their portfolio | 184.6k $62.5m | Reduced -10.5k |
| Caisse de depot et placement du Quebec 0.09% of their portfolio | 182.0k $61.6m | Reduced -38.8k |
| FMR LLC 0.00% of their portfolio | 177.6k $60.1m | Reduced -2.4k |
| UBS Group AG 0.01% of their portfolio | 175.8k $59.5m | Added +46.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 166.6k $56.4m | Reduced -17.1k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 165.8k $56.1m | Reduced -6.4k |
| LORD, ABBETT & CO. LLC 0.16% of their portfolio | 164.5k $55.7m | Added +9.8k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 129.4k $44.7m | Reduced -11.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.05% of their portfolio | 117.4k $39.7m | Added +7.7k |
| SEI INVESTMENTS CO 0.03% of their portfolio | 117.1k $39.6m | Added +9.5k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.06% of their portfolio | 116.2k $39.3m | Added +14.4k |
| Treasurer of the State of North Carolina 0.10% of their portfolio | 113.6k $38.4m | Added +10.1k |
| Quantinno Capital Management LP 0.04% of their portfolio | 108.7k $36.8m | Added +13.7k |
| LOOMIS SAYLES & CO L P 0.04% of their portfolio | 103.1k $34.9m | Added +17.1k |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 93.5k $31.7m | Added +3.4k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 90.3k $30.5m | Added +34.0k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.04% of their portfolio | 89.1k $30.1m | Reduced -2.3k |
| Arbejdsmarkedets Tillaegspension 0.65% of their portfolio | 88.6k $30.0m | Reduced -3.3k |
| Polar Capital Holdings Plc 0.08% of their portfolio | 85.4k $28.9m | Reduced -1.9k |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 83.2k $28.2m | Reduced -36.4k |
| Empowered Funds, LLC 0.15% of their portfolio | 81.8k $27.7m | Added +6.2k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 77.2k $26.1m | Reduced -14.4k |
| Retirement Systems of Alabama 0.08% of their portfolio | 75.6k $25.6m | Reduced -10.7k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 74.9k $25.3m | Reduced -28.6k |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 72.3k $24.5m | Reduced -4.5k |
| Zurich Insurance Group Ltd/FI 0.17% of their portfolio | 71.3k $24.1m | New |
| California Public Employees Retirement System 0.01% of their portfolio | 69.1k $23.4m | Reduced -829 |
| Capricorn Fund Managers Ltd 1.87% of their portfolio | 69.0k $23.4m | New |
| NORTH STAR ASSET MANAGEMENT INC 0.89% of their portfolio | 67.0k $22.7m | Reduced -3.2k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 59.9k $20.3m | Reduced -2.8k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 59.1k $20.0m | Reduced -1.9k |
| Wallace Capital Management Inc. 2.16% of their portfolio | 58.3k $19.7m | Reduced -4.5k |
| PRUDENTIAL FINANCIAL INC 0.02% of their portfolio | 56.8k $19.2m | Added +6.1k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.08% of their portfolio | 54.1k $18.3m | Reduced -76.8k |
| Nuveen, LLC 0.00% of their portfolio | 52.6k $17.8m | Reduced -12.7k |
| Engineers Gate Manager LP 0.23% of their portfolio | 51.9k $17.5m | Added +32.0k |
| Swiss National Bank 0.01% of their portfolio | 50.9k $17.2m | Reduced -4.7k |
| STOREBRAND ASSET MANAGEMENT AS 0.04% of their portfolio | 48.3k $16.3m | Unchanged |
| Moran Wealth Management, LLC 0.42% of their portfolio | 45.5k $15.4m | Added +22.3k |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 44.2k $15.0m | Added +13.0k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 43.9k $14.9m | Added +11.1k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.02% of their portfolio | 42.9k $14.5m | Reduced -2.5k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 42.8k $14.5m | Added +3.6k |
| STRS OHIO 0.05% of their portfolio | 42.3k $14.3m | Added +41.6k |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.03% of their portfolio | 41.3k $14.0m | Added +31.3k |
| Robeco Institutional Asset Management B.V. 0.02% of their portfolio | 40.0k $13.5m | Reduced -9.3k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 39.7k $13.4m | Reduced -12.2k |
| Thrivent Financial for Lutherans 0.02% of their portfolio | 38.9k $13.2m | Reduced -545 |
| Legal & General Group Plc 0.00% of their portfolio | 37.6k $12.7m | Reduced -3.2k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 37.4k $12.6m | Added +34.1k |
| NORDEA INVESTMENT MANAGEMENT AB 0.01% of their portfolio | 35.7k $12.3m | Reduced -2.3k |
| Calamos Advisors LLC 0.04% of their portfolio | 35.4k $12.0m | Unchanged |
| Livforsakringsbolaget Skandia, Omsesidigt 0.38% of their portfolio | 35.0k $11.8m | Unchanged |
| BASSWOOD CAPITAL MANAGEMENT, L.L.C. 0.50% of their portfolio | 34.5k $11.7m | Added +22.2k |
| Goodman Financial Corp 1.72% of their portfolio | 33.0k $11.2m | Added +470 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 32.8k $11.1m | Reduced -2.0k |
| ZACKS INVESTMENT MANAGEMENT 0.08% of their portfolio | 32.1k $10.9m | Reduced -609 |
| INTECH INVESTMENT MANAGEMENT LLC 0.10% of their portfolio | 31.9k $10.8m | Added +6.7k |
| CAPITAL FUND MANAGEMENT S.A. 0.07% of their portfolio | 30.8k $10.4m | New |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 29.9k $10.1m | Reduced -62.4k |
| PEAK6 LLC 0.24% of their portfolio | 29.6k $10.0m | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 29.3k $9.9m | Reduced -3.6k |
| NICOLA WEALTH MANAGEMENT LTD. 1.13% of their portfolio | 29.0k $9.8m | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 28.0k $9.5m | Added +10.0k |
| Illinois Municipal Retirement Fund 0.11% of their portfolio | 27.8k $9.4m | Added +6.5k |
| ASSETMARK, INC 0.02% of their portfolio | 27.2k $9.2m | Reduced -306 |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.01% of their portfolio | 27.0k $9.3m | Added +7.2k |
| Schonfeld Strategic Advisors LLC 0.05% of their portfolio | 26.7k $9.0m | Reduced -39.5k |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.03% of their portfolio | 26.5k $9.0m | Reduced -12.3k |
| CHASE INVESTMENT COUNSEL CORP 1.85% of their portfolio | 25.9k $8.8m | Added +7.6k |