Ticker · CUSIP 008252108

AMG

AFFILIATED MANAGERS GROUP IN
Financial Services·Asset Management
···Share
Holders (tracked)
13
Combined shares
3,270,192
Combined value
$872.95M
Last close
$299.41
Quarter
2025Q4
Tracked holders · last 8 quarters
-3 vs previous quarter over the last 8.
13182024Q12025Q4
Price is +12.2% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

30 events
  1. Jeremy Grantham (GMO) trimmed2026-02-17
    −5,299 shares · 2025Q4
    13F
  2. Izzy Englander (Millennium Mgmt) trimmed2026-02-17
    −221,103 shares · 2025Q4
    13F
  3. Steve Cohen (Point72) exited2026-02-17
    −3,779 shares · 2025Q4
    13F
  4. Ken Griffin (Citadel Advisors) trimmed2026-02-17
    −325,704 shares · 2025Q4
    13F
  5. D.E. Shaw & Co. trimmed2026-02-17
    −5,349 shares · 2025Q4
    13F
  6. T. Rowe Price trimmed2026-02-17
    −1,961 shares · 2025Q4
    13F
  7. Two Sigma Investments exited2026-02-17
    −7,495 shares · 2025Q4
    13F
  8. Ray Dalio (Bridgewater Associates) trimmed2026-02-13
    −1,175 shares · 2025Q4
    13F
  9. Dodge & Cox exited2026-02-13
    −2,400 shares · 2025Q4
    13F
  10. Southeastern Asset (Longleaf) trimmed2026-02-13
    −1,276 shares · 2025Q4
    13F
  11. John Rogers (Ariel Investments) trimmed2026-02-13
    −81,601 shares · 2025Q4
    13F
  12. Renaissance Technologies trimmed2026-02-12
    −48,200 shares · 2025Q4
    13F
  13. Norges Bank (Norway SWF) opened position2026-02-10
    +394,559 shares · 2025Q4
    13F
  14. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +40,107 shares · 2025Q4
    13F
  15. Mario Gabelli (GAMCO) trimmed2026-02-05
    −775 shares · 2025Q4
    13F
  16. Paul Tudor Jones (Tudor Investment) exited2025-12-09
    −16,498 shares · 2025Q3
    13F
  17. D.E. Shaw & Co. trimmed2025-11-14
    −2,462 shares · 2025Q3
    13F
  18. Izzy Englander (Millennium Mgmt) trimmed2025-11-14
    −552,213 shares · 2025Q3
    13F
  19. Steve Cohen (Point72) trimmed2025-11-14
    −26,021 shares · 2025Q3
    13F
  20. Two Sigma Investments opened position2025-11-14
    +7,495 shares · 2025Q3
    13F
  21. T. Rowe Price added2025-11-14
    +10,173 shares · 2025Q3
    13F
  22. John Rogers (Ariel Investments) trimmed2025-11-14
    −91,251 shares · 2025Q3
    13F
  23. Dodge & Cox trimmed2025-11-13
    −600 shares · 2025Q3
    13F
  24. Ray Dalio (Bridgewater Associates) trimmed2025-11-13
    −95,914 shares · 2025Q3
    13F
  25. Renaissance Technologies added2025-11-13
    +22,900 shares · 2025Q3
    13F
  26. Jeremy Grantham (GMO) trimmed2025-11-13
    −163 shares · 2025Q3
    13F
  27. Norges Bank (Norway SWF) exited2025-11-13
    −364,786 shares · 2025Q3
    13F
  28. Ken Fisher (Fisher Asset Mgmt) added2025-11-12
    +35,349 shares · 2025Q3
    13F
  29. Mario Gabelli (GAMCO) added2025-11-12
    +375 shares · 2025Q3
    13F
  30. Norges Bank (Norway SWF) trimmed2025-11-12
    −497 shares · 2024Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for AMG →
Follow-the-investor returns
If you'd copied each holder of AMG…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2016Q1$11.61+2478.8%$72.5M
John Rogers (Ariel Investments)2018Q3$119.12+151.4%$354.0M
Southeastern Asset (Longleaf)2018Q3$128.22+133.5%$1.7M
Renaissance Technologies2016Q3$132.36+126.2%$5.7M
D.E. Shaw & Co.2016Q1$133.16+124.9%$11.8M
Jeremy Grantham (GMO)2020Q3$134.11+123.3%$3.4M
Ray Dalio (Bridgewater Associates)2016Q2$156.73+91.0%$3.9M
Norges Bank (Norway SWF)2016Q1$161.26+85.7%$118.1M
Izzy Englander (Millennium Mgmt)2016Q1$176.86+69.3%$238.3M
Mario Gabelli (GAMCO)2024Q1$178.56+67.7%$599K
Ken Fisher (Fisher Asset Mgmt)2016Q1$184.73+62.1%$73.0M
Ken Griffin (Citadel Advisors)2016Q1$288.04+3.9%$95.6M
Ken Griffin (Citadel Advisors)2016Q1$288.04+3.9%$95.6M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions1
Added to1
Trimmed10
Exited3

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
15
$51.25B
2022Q2
15
$41.77B
2022Q3
17
$41.0M
2022Q4
17
$1.12B
2023Q1
19
$876.5M
2023Q2
18
$931.8M
2023Q3
14
$910.9M
2023Q4
14
$1.03B
2024Q1
18
$1.08B
2024Q2
17
$1.05B
2024Q3
18
$640.4M
2024Q4
15
$657.2M
2025Q1
15
$655.2M
2025Q2
16
$861.6M
2025Q3
16
$789.4M
2025Q4
13
$873.0M

Who owns AMG

13 super-investors · 2025Q4
Tracked stake
3.27M
shares
Combined value
$873M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added1Trim11
#ManagerSharesValue
1John Rogers
Ariel Investments
1.18M$341M
2Izzy Englander
Millennium Mgmt
796.0K$229M
3Norges Bank
Norway SWF
394.6K$114M
4Ken Griffin
Citadel Advisors
319.4K$92M
5Ken Fisher
Fisher Asset Mgmt
243.8K$70M
6D.E. Shaw & Co.39.3K$11M
7Renaissance Technologies19.1K$6M
8Ray Dalio
Bridgewater Associates
13.2K$4M
9Jeremy Grantham
GMO
11.3K$3M
10Southeastern Asset
Longleaf
5.6K$2M
11Mario Gabelli
GAMCO
2.0K$577K
12Ken Griffin
Citadel Advisors
1.5K$432K
13T. Rowe Price242.3K$70K

Recent moves

20 transactions
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