AFFILIATED MANAGERS GROUP (AMG) Institutional Ownership Changes & 13F Activity

AFFILIATED MANAGERS GROUP (AMG) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Ariel Appreciation Fund, Renaissance Technologies LLC, Sequoia Financial Advisors, Longleaf Partners, and Dodge & Cox Stock Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2024Renaissance Technologies LLCSell-48,30056,700$9,496
Q1 2024Longleaf PartnersSell-44,497837,878$140,319,429
Q4 2023Renaissance Technologies LLCBuy89,700105,000$15,899
Q4 2023Ariel Appreciation FundBuy54,5501,242,696$188,169,028
Q4 2023Longleaf PartnersSell-25,664882,375$133,609,223
Q4 2023Sequoia Financial AdvisorsBuy3,8953,895$589,788
Q3 2023Ariel Appreciation FundBuy120,9771,188,146$154,862,950
Q3 2023Longleaf PartnersSell-12,996908,039$118,353,803
Q3 2023Renaissance Technologies LLCSell-5,60015,300$1,994
Q2 2023Renaissance Technologies LLCSell-71,20020,900$3,133
Q2 2023Ariel Appreciation FundSell-24,9911,067,169$159,957,962
Q2 2023Longleaf PartnersSell-2,323921,035$138,053,936
Q1 2023Ariel Appreciation FundSell-36,1471,092,160$155,545,427
Q1 2023Renaissance Technologies LLCBuy17,80092,100$13,117
Q1 2023Longleaf PartnersSell-8,423923,358$131,504,647
Q4 2022Longleaf PartnersSell-686,331931,781$147,622,064
Q4 2022Renaissance Technologies LLCBuy35,60074,300$11,771
Q4 2022Ariel Appreciation FundSell-16,9471,128,307$178,757,678
Q3 2022Longleaf PartnersSell-134,7231,618,112$180,986
Q3 2022Renaissance Technologies LLCSell-69,80038,700$4,329
Q3 2022Ariel Appreciation FundBuy35,3041,145,254$128,097
Q2 2022Ariel Appreciation FundBuy172,7261,109,950$129,420
Q2 2022Longleaf PartnersSell-22,3951,752,835$204,381
Q2 2022Renaissance Technologies LLCBuy9,397108,500$12,651
Q1 2022Longleaf PartnersBuy238,0691,775,230$250,218
Q1 2022Renaissance Technologies LLCBuy49,70399,103$13,969
Q1 2022Ariel Appreciation FundBuy39,576937,224$132,102
Q4 2021Longleaf PartnersSell-62,6001,537,161$252,879
Q4 2021Ariel Appreciation FundBuy54,839897,648$147,672
Q3 2021Longleaf PartnersBuy88,7281,599,761$241,708

Frequently asked questions about AMG activity

  • Which institutional owners are buying AMG?

    Institutional owners buying AMG include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AMG activity?

    "Buy" means an investor increased their reported position in AMG compared to the prior reporting period. This reflects growing exposure to AFFILIATED MANAGERS GROUP (AMG) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AMG increasing?

    Institutional interest in AMG can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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