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.
Q1 2026 vs. Q4 2025
How the institutions holding ClearSign Technologies Corp changed between Q4 2025 and Q1 2026.
All holders in Q1 2026All holders in Q4 2025
| Measure | Q4 2025 | Of which not filed for Q1 2026 | Q1 2026 | Change |
|---|---|---|---|---|
| Holders | 38 | 1 | 20 | −17 |
| SharesConverted for a 1-for-10 split | 445.7K | 132.3K | 398.5K | +85.1K (+27.2%) |
| Value | $2.48M | $735.6K | $1.74M | −$6.90K (−0.4%) |
1 institution that held it in Q4 2025 haven't filed for Q1 2026 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 Q1 2026 but not at the end of Q4 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Vanguard Capital Management LLC | 105,429 | $459.7K | 0.00% |
| Beacon Pointe Advisors, LLC | 27,173 | $118.5K | 0.00% |
| Vanguard Fiduciary Trust Co | 23,460 | $102.3K | 0.00% |
| Vanguard Global Advisers, LLC | 1,350 | $5.89K | 0.00% |
| Group One Trading, L.P. | 9 | $39 | 0.00% |
Sold out (22)
Institutions that held ClearSign Technologies Corp at the end of Q4 2025 and filed for Q1 2026 without it.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Susquehanna International Group, LLP | 104,759 | $58.3K |
| State Street Corp | 88,989 | $49.5K |
| Renaissance Technologies LLC | 77,800 | $43.3K |
| Northern Trust Corp | 74,020 | $41.2K |
| Disciplined Investments, LLC | 55,886 | $31.1K |
| Americana Partners, LLC | 55,000 | $30.6K |
| Raymond James Financial Inc | 51,847 | $28.8K |
| Integrity Alliance, LLC. | 39,524 | $22.0K |
| Prevail Innovative Wealth Advisors, LLC | 38,306 | $21.3K |
| Highland Capital Management, LLC | 32,454 | $18.0K |
| XTX Topco Ltd | 29,015 | $16.1K |
| Two Sigma Securities, LLC | 26,794 | $14.9K |
| Jane Street Group, LLC | 23,825 | $13.3K |
| Chicago Partners Investment Group LLC | 18,000 | $12.5K |
| HRT Financial LP | 17,578 | $9.00K |
| Flax Pond Capital, LLC | 13,549 | $7.54K |
| Simplex Trading, LLC | 7,211 | $4.01K |
| UBS Group AG | 1,225 | $681 |
| Bank of America Corp | 907 | $504 |
| Tucker Asset Management LLC | 39 | $22 |
| Allworth Financial LP | 6 | $4 |
| Citigroup Inc | 1 | $1 |
Not filed for Q1 2026 yet (1)
Institutions that held ClearSign Technologies Corp at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Vanguard Group Inc | 1,322,980 | $735.6K |