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Ken Griffin's CMS Energy Corporation (CMS) position

Yes: as of Q1 2026, Ken Griffin holds 86K shares of CMS worth $6.6M (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
$6.6M
Shares held
86K
% of portfolio
0.0%
Est. average buy price (i)
$70.75
Quarter-end price
$77.58

Estimated trade prices

Average price in quarters with purchases
$65.82
Average prices in quarters with sales
  • Q1 2026: $74.23 (1.7M shares sold)
  • Q4 2025: $72.73 (1.3M shares sold)
  • Q2 2024: $60.53 (315K shares sold)
  • Q4 2023: $55.85 (2.2M shares sold)
  • Q4 2022: $59.12 (430K shares sold)
  • Q2 2022: $69.05 (184K shares sold)
  • Q3 2021: $62.40 (846K shares sold)
  • Q2 2021: $62.19 (300K shares sold)

CMS price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$40$60$8020222023202420252026Sold 846K shares (97.1%) · Q3 2021. Average closing price $62.40 · Price range $58.86–$65.61846KsharessoldNew position of 316K shares · Q1 2022. Average closing price $64.86 · Price range $61.85–$69.99316KsharespurchasedSold 184K shares (58.2%) · Q2 2022. Average closing price $69.05 · Price range $61.16–$73.56184KsharessoldAdded 907K shares (686.6%) · Q3 2022. Average closing price $67.27 · Price range $58.24–$70.94907KsharespurchasedSold 430K shares (41.3%) · Q4 2022. Average closing price $59.12 · Price range $53.36–$64.31430KsharessoldAdded 533K shares (87.4%) · Q1 2023. Average closing price $61.47 · Price range $57.78–$65.39533KsharespurchasedAdded 292K shares (25.5%) · Q2 2023. Average closing price $60.32 · Price range $56.90–$62.63292KsharespurchasedAdded 771K shares (53.8%) · Q3 2023. Average closing price $57.92 · Price range $52.70–$63.42771KsharespurchasedSold 2.2M shares (98.5%) · Q4 2023. Average closing price $55.85 · Price range $50.57–$59.912.2MsharessoldAdded 746K shares (over 1,000%) · Q1 2024. Average closing price $57.96 · Price range $55.61–$60.47746KsharespurchasedSold 315K shares (40.4%) · Q2 2024. Average closing price $60.53 · Price range $56.89–$63.24315KsharessoldNew position of 1.4M shares · Q1 2025. Average closing price $69.83 · Price range $64.99–$75.111.4MsharespurchasedAdded 728K shares (51.4%) · Q2 2025. Average closing price $71.25 · Price range $68.57–$75.51728KsharespurchasedAdded 873K shares (40.7%) · Q3 2025. Average closing price $71.83 · Price range $69.37–$74.67873KsharespurchasedSold 1.3M shares (41.9%) · Q4 2025. Average closing price $72.73 · Price range $69.17–$75.441.3MsharessoldSold 1.7M shares (95.1%) · Q1 2026. Average closing price $74.23 · Price range $69.47–$78.291.7Msharessold← Earlier —1 sell
Average closing price · filing quarter
$74.23
Price range · filing quarter
$69.47 – $78.29
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −1.7M −$124M −95.1% 86K May 15, 2026
Q4 2025 Reduced −1.3M −$92M −41.9% 1.8M Feb 17, 2026
Q3 2025 Added +873K +$63M +40.7% 3.0M Nov 14, 2025
Q2 2025 Added +728K +$52M +51.4% 2.1M Aug 14, 2025
Q1 2025 New +1.4M +$99M – 1.4M May 15, 2025
Q2 2024 Reduced −315K −$19M −40.4% 464K Aug 14, 2024
Q1 2024 Added +746K +$43M +2,249.9% 779K May 15, 2024
Q4 2023 Reduced −2.2M −$121M −98.5% 33K Feb 14, 2024
Q3 2023 Added +771K +$45M +53.8% 2.2M Nov 14, 2023
Q2 2023 Added +292K +$18M +25.5% 1.4M Aug 14, 2023
Q1 2023 Added +533K +$33M +87.4% 1.1M May 15, 2023
Q4 2022 Reduced −430K −$25M −41.3% 610K Feb 14, 2023
Q3 2022 Added +907K +$61M +686.6% 1.0M Nov 14, 2022
Q2 2022 Reduced −184K −$13M −58.2% 132K Aug 15, 2022
Q1 2022 New +316K +$21M – 316K May 16, 2022
Q3 2021 Reduced −846K −$53M −97.1% 25K Nov 15, 2021
Q2 2021 Reduced −300K −$19M −25.6% 871K Aug 16, 2021
Q1 2021 First covered – – – 1.2M May 21, 2021
Data through Q1 2026 · filed May 15, 2026
18 grouped rows from 18 quarters

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Common questions

Does Ken Griffin own CMS?

Yes. As of Q1 2026, Ken Griffin disclosed 86K shares of CMS, worth $6.6M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy CMS?

Ken Griffin held CMS 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 CMS?

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

How many shares of CMS does Ken Griffin own?

Ken Griffin disclosed 86K shares of CMS 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 CMS?

Ken Griffin's estimated average buy price for CMS is $70.75, from quarter-average prices weighted by the shares added each quarter. 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.