ClearSign Technologies Corp
CLIR- Exchange
- Nasdaq
- Industry
- Industrial Instruments For Measurement, Display, and Control
- SEC CIK
- 0001434524
In the last 90 days, ClearSign Technologies Corp insiders filed 1 open-market purchase and 0 sales; 24 institutions reported holding it in 13F filings for Q2 2026, worth $1.55M in total; no superinvestor holds it.
Q4 2025 vs. Q3 2025
How the institutions holding ClearSign Technologies Corp changed between Q3 2025 and Q4 2025.
All holders in Q4 2025All holders in Q3 2025
| Measure | Q3 2025 | Of which not filed for Q4 2025 | Q4 2025 | Change |
|---|---|---|---|---|
| Holders | 39 | 1 | 38 | 0 |
| Shares | 4.23M | 20.5K | 4.46M | +242.9K (+5.8%) |
| Value | $3.27M | $15.8K | $2.48M | −$771.3K (−23.7%) |
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (5)
Institutions that held ClearSign Technologies Corp at the end of Q4 2025 but not at the end of Q3 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| XTX Topco Ltd | 29,015 | $16.1K | 0.00% |
| Two Sigma Securities, LLC | 26,794 | $14.9K | 0.00% |
| Flax Pond Capital, LLC | 13,549 | $7.54K | 0.01% |
| Tucker Asset Management LLC | 39 | $22 | 0.00% |
| Citigroup Inc | 1 | $1 | 0.00% |
Sold out (5)
Institutions that held ClearSign Technologies Corp at the end of Q3 2025 and filed for Q4 2025 without it.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Citadel Advisors LLC | 26,714 | $20.6K |
| Diversified Portfolios, Inc. | 20,000 | $15.4K |
| Goldman Sachs Group Inc | 11,044 | $8.52K |
| Royal Bank of Canada | 1,496 | $1.00K |
| Barclays PLC | 403 | $311 |
Not filed for Q4 2025 yet (1)
Institutions that held ClearSign Technologies Corp at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Cubist Systematic Strategies, LLC | 20,508 | $15.8K |