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Ken Griffin's Affiliated Managers Group, Inc. (AMG) position

Yes: as of Q1 2026, Ken Griffin holds 247K shares of AMG worth an amount we cannot price (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
an amount we cannot price
Shares held
247K
% of portfolio
0.0%
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

AMG price vs Griffin's position

Dates
$340$360$380← Earlier —11 purchases, 9 sells
Average closing price · filing quarter
Price range · filing quarter

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −72K −22.6% 247K May 15, 2026
Q4 2025 Reduced −326K −50.5% 319K Feb 17, 2026
Q3 2025 Added +5K +0.8% 645K Nov 14, 2025
Q2 2025 Added +285K +80.3% 640K Aug 14, 2025
Q1 2025 Added +4K +1.1% 355K May 15, 2025
Q4 2024 Reduced −72K −17.0% 351K Feb 14, 2025
Q3 2024 Reduced −31K −6.9% 423K Nov 14, 2024
Q2 2024 Added +235K +107.3% 454K Aug 14, 2024
Q1 2024 Reduced −143K −39.5% 219K May 15, 2024
Q4 2023 Added +80K +28.4% 362K Feb 14, 2024
Q3 2023 Added +279K +11,342.8% 282K Nov 14, 2023
Q2 2023 Reduced −106K −97.7% 2K Aug 14, 2023
Q1 2023 Reduced −357K −76.6% 109K May 15, 2023
Q4 2022 Added +81K +21.0% 466K Feb 14, 2023
Q3 2022 Added +167K +76.9% 385K Nov 14, 2022
Q2 2022 Reduced −102K −31.9% 217K Aug 15, 2022
Q1 2022 Added +317K +12,625.3% 320K May 16, 2022
Q4 2021 Added +531 +26.8% 3K Feb 14, 2022
Q3 2021 Reduced −40K −95.3% 2K Nov 15, 2021
Q2 2021 Added +39K +1,160.3% 42K Aug 16, 2021
Q1 2021 First covered 3K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
21 grouped rows from 21 quarters

More Griffin positions

Common questions

Does Ken Griffin own AMG?

Yes. As of Q1 2026, Ken Griffin disclosed 247K shares of AMG, worth an amount we cannot price. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy AMG?

Ken Griffin held AMG since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell AMG?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in AMG. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of AMG does Ken Griffin own?

Ken Griffin disclosed 247K shares of AMG as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for AMG?

Ken Griffin began building the AMG position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.