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Clearsign Technologies Corp (CLIR)

CUSIP: 185064102 | NYSE | Industrials · Pollution & Treatment Controls | Micro Cap | 138 institutional holders

Quarters

Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025
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Beneficial Ownership — 13D / 13G

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5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13G/AOtter Capital LLC1,364,97719.9%New 5%+ stakeJul 22, 2026No 13F filer matched
13G/AOtter Capital LLC1,364,977
19.9% of class · Jul 22, 2026New 5%+ stake
No 13F filer matched

Institutional Holders — Q1 2026

Vanguard Group Inc0
0.0% of portfolio›$0
StyleTurnoverLocationFiled
Vanguard Group Inc
0$00.0%N/AN/AValley Forge, PA2026-05-14