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Ken Griffin's Federal Signal Corporation (FSS) position

Yes: as of Q1 2026, Ken Griffin holds 61K shares of FSS 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
61K
% of portfolio
0.0%
Est. average buy price (i)
$101.22
Quarter-end price
$108.14

Estimated trade prices

Average price in quarters with purchases
$67.83
Average prices in quarters with sales
  • Q4 2025: $114.47 (12K shares sold)
  • Q3 2025: $120.03 (10K shares sold)
  • Q2 2025: $89.08 (86K shares sold)
  • Q3 2024: $91.41 (24K shares sold)
  • Q2 2023: $55.28 (55K shares sold)
  • Q1 2023: $52.34 (60K shares sold)
  • Q2 2022: $34.36 (50K shares sold)
  • Q1 2022: $37.25 (13K shares sold)
  • Q2 2021: $41.08 (90K shares sold)

FSS price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$30$100$15020222023202420252026New position of 109K shares · Q4 2021. Average closing price $43.43 · Price range $39.44–$48.07109KsharespurchasedSold 13K shares (11.8%) · Q1 2022. Average closing price $37.25 · Price range $33.38–$43.9613KsharessoldSold 50K shares (51.7%) · Q2 2022. Average closing price $34.36 · Price range $32.08–$36.6150KsharessoldAdded 62K shares (134.6%) · Q3 2022. Average closing price $39.29 · Price range $34.66–$43.0162KsharespurchasedAdded 8K shares (7.1%) · Q4 2022. Average closing price $45.88 · Price range $38.85–$50.148KsharespurchasedSold 60K shares (51.5%) · Q1 2023. Average closing price $52.34 · Price range $46.50–$57.9360KsharessoldSold 55K shares (98.1%) · Q2 2023. Average closing price $55.28 · Price range $49.89–$64.0355KsharessoldAdded 10K shares (904.2%) · Q3 2023. Average closing price $60.58 · Price range $56.72–$64.4710KsharespurchasedNew position of 37K shares · Q1 2024. Average closing price $78.34 · Price range $72.14–$84.8737KsharespurchasedAdded 15K shares (40.7%) · Q2 2024. Average closing price $84.98 · Price range $80.34–$92.0215KsharespurchasedSold 24K shares (47.0%) · Q3 2024. Average closing price $91.41 · Price range $82.35–$99.9724KsharessoldAdded 103K shares (377.8%) · Q4 2024. Average closing price $91.89 · Price range $81.56–$99.70103KsharespurchasedAdded 8K shares (5.9%) · Q1 2025. Average closing price $89.37 · Price range $73.55–$101.328KsharespurchasedSold 86K shares (61.7%) · Q2 2025. Average closing price $89.08 · Price range $69.23–$106.4286KsharessoldSold 10K shares (19.6%) · Q3 2025. Average closing price $120.03 · Price range $104.86–$129.8010KsharessoldSold 12K shares (28.3%) · Q4 2025. Average closing price $114.47 · Price range $106.16–$129.7612KsharessoldAdded 30K shares (99.7%) · Q1 2026. Average closing price $113.03 · Price range $104.77–$120.4930Ksharespurchased← Earlier —1 sell
Average closing price · filing quarter
$113.03
Price range · filing quarter
$104.77 – $120.49
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +30K +$3.4M +99.7% 61K May 15, 2026
Q4 2025 Reduced −12K −$1.4M −28.3% 31K Feb 17, 2026
Q3 2025 Reduced −10K −$1.2M −19.6% 43K Nov 14, 2025
Q2 2025 Reduced −86K −$7.6M −61.7% 53K Aug 14, 2025
Q1 2025 Added +8K +$687K +5.9% 139K May 15, 2025
Q4 2024 Added +103K +$9.5M +377.8% 131K Feb 14, 2025
Q3 2024 Reduced −24K −$2.2M −47.0% 27K Nov 14, 2024
Q2 2024 Added +15K +$1.3M +40.7% 52K Aug 14, 2024
Q1 2024 New +37K +$2.9M – 37K May 15, 2024
Q3 2023 Added +10K +$598K +904.2% 11K Nov 14, 2023
Q2 2023 Reduced −55K −$3.1M −98.1% 1K Aug 14, 2023
Q1 2023 Reduced −60K −$3.1M −51.5% 56K May 15, 2023
Q4 2022 Added +8K +$355K +7.1% 116K Feb 14, 2023
Q3 2022 Added +62K +$2.5M +134.6% 109K Nov 14, 2022
Q2 2022 Reduced −50K −$1.7M −51.7% 46K Aug 15, 2022
Q1 2022 Reduced −13K −$476K −11.8% 96K May 16, 2022
Q4 2021 New +109K +$4.7M – 109K Feb 14, 2022
Q2 2021 Reduced −90K −$3.7M −77.1% 27K Aug 16, 2021
Q1 2021 First covered – – – 117K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
19 grouped rows from 19 quarters

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Common questions

Does Ken Griffin own FSS?

Yes. As of Q1 2026, Ken Griffin disclosed 61K shares of FSS, worth $6.6M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy FSS?

Ken Griffin held FSS 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 FSS?

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

How many shares of FSS does Ken Griffin own?

Ken Griffin disclosed 61K shares of FSS 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 FSS?

Ken Griffin's estimated average buy price for FSS is $101.22, 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.