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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.

Other share classesMGRMGRBMGRDMGRE

13F holders, Q1 2026

Institutional positions in Affiliated Managers Group, Inc. as of Mar 31, 2026. 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
548
+44 vs. Q4 2025
Shares held
24.8M
+2.07M (+9.1%) vs. Q4 2025
Total value
$6.88B
+$311.0M (+4.7%) vs. Q4 2025
New holders
90
218 more added
Sold out
46
137 more reduced

7 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 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.

Institutional holdersQ1 2026: 548 institutions
Q1 2021: 320 institutionsQ2 2021: 340 institutionsQ3 2021: 335 institutionsQ4 2021: 365 institutionsQ1 2022: 335 institutionsQ2 2022: 311 institutionsQ3 2022: 329 institutionsQ4 2022: 367 institutionsQ1 2023: 388 institutionsQ2 2023: 381 institutionsQ3 2023: 360 institutionsQ4 2023: 386 institutionsQ1 2024: 403 institutionsQ2 2024: 407 institutionsQ3 2024: 422 institutionsQ4 2024: 408 institutionsQ1 2025: 396 institutionsQ2 2025: 432 institutionsQ3 2025: 451 institutionsQ4 2025: 511 institutionsQ1 2026: 548 institutionsQ2 2026: 567 institutions
Value heldQ1 2026: $6.88B
Q1 2021: $6.28BQ2 2021: $6.34BQ3 2021: $6.04BQ4 2021: $6.45BQ1 2022: $5.32BQ2 2022: $4.33BQ3 2022: $4.06BQ4 2022: $5.50BQ1 2023: $4.92BQ2 2023: $4.94BQ3 2023: $4.16BQ4 2023: $4.77BQ1 2024: $5.10BQ2 2024: $4.57BQ3 2024: $5.04BQ4 2024: $5.21BQ1 2025: $4.65BQ2 2025: $5.28BQ3 2025: $6.32BQ4 2025: $7.47BQ1 2026: $6.88BQ2 2026: $8.53B
Institutions holding AMG and their total value by quarter
QuarterHoldersValue
Q2 2026567$8.53B
Q1 2026548$6.88B
Q4 2025511$7.47B
Q3 2025451$6.32B
Q2 2025432$5.28B
Q1 2025396$4.65B
Q4 2024408$5.21B
Q3 2024422$5.04B
Q2 2024407$4.57B
Q1 2024403$5.10B
Q4 2023386$4.77B
Q3 2023360$4.16B
Q2 2023381$4.94B
Q1 2023388$4.92B
Q4 2022367$5.50B
Q3 2022329$4.06B
Q2 2022311$4.33B
Q1 2022335$5.32B
Q4 2021365$6.45B
Q3 2021335$6.04B
Q2 2021340$6.34B
Q1 2021320$6.28B

Institutions, Q1 2026

Shares, value and share of portfolio for each institution holding Affiliated Managers Group, Inc.; share changes are against Q4 2025.

Institutions holding AMG in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
North Star Investment Management Corp.12$3.32K0.00%+3+33.3%Added
Dogwood Wealth Management LLC12$3.32K0.00%+12New
UMA Financial Services, Inc.11$3.04K0.00%00.0%Unchanged
Rialto Wealth Management, LLC11$3.04K0.00%+4+57.1%Added
ZRC Wealth Management, LLC10$2.77K0.00%00.0%Unchanged
Zions Bancorporation, National Association10$2.77K0.00%+10New
Manchester Capital Management LLC9$2.49K0.00%−2−18.2%Reduced
JPL Wealth Management, LLC9$2.49K0.00%+9New
DiNuzzo Private Wealth, Inc.8$2.21K0.00%00.0%Unchanged
Kilter Group LLC8$2.21K0.00%00.0%Unchanged
Bogart Wealth, LLC8$2.21K0.00%+4+100.0%Added
Ares Financial Consulting, LLC8$2.19K0.00%00.0%Unchanged
Beaird Harris Wealth Management, LLC8$2.12K0.00%00.0%Unchanged
SJS Investment Consulting Inc.7$1.94K0.00%+2+40.0%Added
Bay Harbor Wealth Management, LLC7$1.94K0.00%+3+75.0%Added
Investors Portfolio Services LLC6$1.82K0.00%−3−33.3%Reduced
Clearstead Advisors, LLC6$1.66K0.00%−78−92.9%Reduced
South State Corp.6$1.66K0.00%00.0%Unchanged
First Horizon Corp6$1.66K0.00%00.0%Unchanged
Kayne Anderson Rudnick Investment Management LLC6$1.66K0.00%00.0%Unchanged
Rothschild Investment LLC6$1.66K0.00%+5+500.0%Added
NBT Bank N A6$1.66K0.00%+6New
Whipplewood Advisors, LLC6$1.66K0.00%+6New
Dunhill Financial, LLC5$1.52K0.00%+5New
Cromwell Holdings LLC5$1.38K0.00%00.0%Unchanged
Brown, Lisle/Cummings, Inc.5$1.38K0.00%+5New
Owl Creek Wealth Partners LLC5$1.38K0.00%+5New
NBC Securities, Inc.5$1.38K0.00%00.0%Unchanged
CoreCap Advisors, LLC4$1.11K0.00%00.0%Unchanged
Avion Wealth7$1.00K0.00%00.0%Unchanged
Central Trust Co3$8310.00%00.0%Unchanged
Prestige Wealth Management Group LLC3$8310.00%00.0%Unchanged
AdvisorNet Financial, Inc3$8300.00%00.0%Unchanged
Financial Management Professionals, Inc.3$8300.00%00.0%Unchanged
Principia Wealth Advisory, LLC3$8300.00%00.0%Unchanged
WPG Advisers, LLC3$8300.00%00.0%Unchanged
HFM Investment Advisors, LLC3$8300.00%00.0%Unchanged
SHP Wealth Management3$8300.00%+1+50.0%Added
Vermillion Wealth Management, Inc.3$8300.00%+3New
Private Wealth Asset Management, LLC2$5530.00%00.0%Unchanged
Murphy & Mullick Capital Management Corp2$5530.00%00.0%Unchanged
Bare Financial Services, Inc2$5530.00%+2New
TFC Financial Management1$2770.00%00.0%Unchanged
Wealth Enhancement Trust Services, Inc.1$2770.00%00.0%Unchanged
GHP Investment Advisors, Inc.1$2770.00%+1New
Hughes Financial Services, LLC1$2770.00%+1New
Raleigh Capital Management Inc.0$10.00%0Unchanged
Capital Advisors, Ltd. LLC1$00.00%00.0%Unchanged
Balyasny Asset Management LLC0$00.00%−231,675−100.0%Sold out
Holocene Advisors, LP0$00.00%−184,010−100.0%Sold out
Alyeska Investment Group, L.P.0$00.00%−145,483−100.0%Sold out
ExodusPoint Capital Management, LP0$00.00%−37,845−100.0%Sold out
Longaeva Partners L.P.0$00.00%−26,553−100.0%Sold out
EAM Investors, LLC0$00.00%−19,138−100.0%Sold out
Karl Kapital LLC0$00.00%−14,898−100.0%Sold out
Ilmarinen Mutual Pension Insurance Co0$00.00%−11,745−100.0%Sold out
Grantham, Mayo, Van Otterloo & Co. LLC0$00.00%−11,259−100.0%Sold out
Capital Fund Management S.A.0$00.00%−10,926−100.0%Sold out
Nomura Holdings Inc0$00.00%−9,000−100.0%Sold out
Skandinaviska Enskilda Banken AB (publ)0$00.00%−8,463−100.0%Sold out
Quest Partners LLC0$00.00%−8,258−100.0%Sold out
Diversified Trust Co0$00.00%−7,898−100.0%Sold out
Two Sigma Advisers, LP0$00.00%−4,700−100.0%Sold out
Altfest L J & Co Inc0$00.00%−4,089−100.0%Sold out
HRT Financial LP0$00.00%−3,708−100.0%Sold out
Lecap Asset Management Ltd0$00.00%−3,685−100.0%Sold out
FJ Capital Management LLC0$00.00%−2,557−100.0%Sold out
Mackenzie Financial Corp0$00.00%−2,032−100.0%Sold out
Hudson Bay Capital Management LP0$00.00%−1,800−100.0%Sold out
CenterBook Partners LP0$00.00%−1,388−100.0%Sold out
Forum Financial Management, LP0$00.00%−1,385−100.0%Sold out
Natixis0$00.00%−1,281−100.0%Sold out
RSM US Wealth Management LLC0$00.00%−1,137−100.0%Sold out
AlphaCore Capital LLC0$00.00%−1,083−100.0%Sold out
First Nebraska Trust Co0$00.00%−799−100.0%Sold out
Mangrove Partners0$00.00%−775−100.0%Sold out
JBF Capital, Inc.0$00.00%−700−100.0%Sold out
Integrated Quantitative Investments LLC0$00.00%−700−100.0%Sold out
Torren Management, LLC0$00.00%−283−100.0%Sold out
Highlander Partners, L.P.0$00.00%−235−100.0%Sold out
CFG Wealth Management Services, Inc.0$00.00%−207−100.0%Sold out
SageView Advisory Group, LLC0$00.00%−104−100.0%Sold out
Leonteq Securities AG0$00.00%−104−100.0%Sold out
Meeder Asset Management Inc0$00.00%−80−100.0%Sold out
Elyxium Wealth, LLC0$00.00%−75−100.0%Sold out
Atlas Capital Advisors LLC0$00.00%−59−100.0%Sold out
Aster Capital Management (DIFC) Ltd0$00.00%−30−100.0%Sold out
Signature Equity Partners, LLC0$00.00%−18−100.0%Sold out
Wealth Watch Advisors, INC0$00.00%−9−100.0%Sold out
Optima Capital LLC0$00.00%−7−100.0%Sold out
Cape Investment Advisory, Inc.0$00.00%−5−100.0%Sold out
Spire Wealth Management0$00.00%−3−100.0%Sold out
Cornerstone Planning Group LLC0$00.00%−2−100.0%Sold out
Thurston, Springer, Miller, Herd & Titak, Inc.0$00.00%−2−100.0%Sold out
Vanguard Group Inc––––Not filed
Norges Bank––––Not filed
Brandywine Global Investment Management, LLC––––Not filed
Comerica Bank––––Not filed
Global Retirement Partners, LLC––––Not filed
EMC Capital Management––––Not filed