13D·WATCH Activist + Insider Intelligence Live feed Blog About Pricing
ISSUER PROFILE · CIK 0001434524 · CUSIP 185064102

ClearSign Technologies CorpCLIR

5 13D/G filings 3 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
-22.0%
avg -22.0%
Median 60d
-41.0%
avg -41.0%
Median 90d
-35.0%
avg -35.0%
Median 180d
-41.0%
avg -41.0%

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
5
1 SCHEDULE · 4 SC
Distinct filers
3
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
1.41
as of 2026-07-15

13D/G Filings Timeline · 5 total

FiledFormFilerStakeSharesIntent
2025-02-19 SCHEDULE clirSPV LLC 4.30% 2,249,027 view →
2022-07-18 SC clirSPV LLC view →
2020-10-07 SC clirSPV LLC view →
2019-07-08 SC SIMMONS JAMES M view →
2018-03-07 SC MARLETT CHRISTOPHER A view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-07-15 16,141 1.41 -26.8%
2026-06-30 22,041 1.42 -3.4%
2026-06-15 22,811 1.64 -14.2%
2026-05-29 26,590 1.00 +2.0%
2026-05-15 26,072 1.44 -0.2%
2026-04-30 26,120 1.66 +0.3%
2026-04-15 26,031 1.00 -42.9%
2026-03-31 45,549 2.27 -82.7%
2026-03-13 263,955 1.05 +48.3%
2026-02-27 177,980 3.68 +9.8%
2026-02-13 162,090 1.54 +9.3%
2026-01-30 148,329 1.00 -6.1%

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