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Ken Griffin's Power Solutions International, Inc. (PSIX) position

Yes: as of Q1 2026, Ken Griffin holds 28K shares of PSIX worth $1.7M (0.0% of the disclosed portfolio). Last quarter the position was unchanged. First disclosed Q4 2024.
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Current value
$1.7M
Shares held
28K
% of portfolio
0.0%
Est. average buy price (i)
$71.35
est. since Q1 2026
Quarter-end price
$60.88

Estimated trade prices

Average price in quarters with purchases
$52.50
Average prices in quarters with sales
  • Q4 2025: $71.38 (67K shares sold)
  • Q2 2025: $37.06 (31K shares sold)

PSIX price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$1$50$100$15020222023202420252026New position of 12K shares · Q4 2024. Average closing price $25.65 · Price range $16.11–$33.3512KsharespurchasedSold 31K shares (29.5%) · Q2 2025. Average closing price $37.06 · Price range $18.70–$68.0131KsharessoldAdded 9K shares (12.3%) · Q3 2025. Average closing price $88.67 · Price range $63.74–$115.789KsharespurchasedSold 67K shares (80.5%) · Q4 2025. Average closing price $71.38 · Price range $51.46–$96.3967Ksharessold
Average closing price · filing quarter
$71.38
Price range · filing quarter
$51.46 – $96.39
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 First covered – – – 28K May 15, 2026
Q4 2025 Reduced −67K −$4.8M −80.5% 16K Feb 17, 2026
Q3 2025 Added +9K +$810K +12.3% 84K Nov 14, 2025
Q2 2025 Reduced −31K −$1.2M −29.5% 75K Aug 14, 2025
Q1 2025 First covered – – – 106K May 15, 2025
Q4 2024 New +12K +$316K – 12K Feb 14, 2025
Data through Q1 2026 · filed May 15, 2026
6 grouped rows from 6 quarters

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Common questions

Does Ken Griffin own PSIX?

Yes. As of Q1 2026, Ken Griffin disclosed 28K shares of PSIX, worth $1.7M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy PSIX?

Ken Griffin first disclosed a PSIX position in Q4 2024; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell PSIX?

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

How many shares of PSIX does Ken Griffin own?

Ken Griffin disclosed 28K shares of PSIX 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 PSIX?

Ken Griffin began building the PSIX 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.