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.
13F holders, Q4 2025
Institutional positions in ClearSign Technologies Corp as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 38
- 0 vs. Q3 2025
- Shares held
- 4.46M
- +242.9K (+5.8%) vs. Q3 2025
- Total value
- $2.48M
- −$771.3K (−23.7%) vs. Q3 2025
- New holders
- 5
- 9 more added
- Sold out
- 5
- 8 more reduced
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CLIR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 24 | $1.55M |
| Q1 2026 | 20 | $1.74M |
| Q4 2025 | 38 | $2.48M |
| Q3 2025 | 39 | $3.27M |
| Q2 2025 | 37 | $2.47M |
| Q1 2025 | 38 | $3.07M |
| Q4 2024 | 31 | $4.84M |
| Q3 2024 | 27 | $2.68M |
| Q2 2024 | 29 | $2.64M |
| Q1 2024 | 27 | $2.81M |
| Q4 2023 | 26 | $3.07M |
| Q3 2023 | 28 | $3.03M |
| Q2 2023 | 27 | $3.47M |
| Q1 2023 | 26 | $2.00M |
| Q4 2022 | 29 | $1.37M |
| Q3 2022 | 27 | $2.44M |
| Q2 2022 | 27 | $3.14M |
| Q1 2022 | 26 | $4.31M |
| Q4 2021 | 27 | $3.74M |
| Q3 2021 | 34 | $5.53M |
| Q2 2021 | 43 | $14.3M |
| Q1 2021 | 35 | $16.0M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding ClearSign Technologies Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 1,322,980 | $735.6K | 0.00% | +45,396+3.6% | Added |
| Simon Quick Advisors, LLC | 603,149 | $335.4K | 0.01% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 523,109 | $291.0K | 0.00% | −1200.0% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 443,000 | $246.0K | 0.00% | 00.0% | Unchanged |
| BlackRock, Inc. | 199,304 | $110.8K | 0.00% | 00.0% | Unchanged |
| Creative Planning | 136,053 | $75.7K | 0.00% | −23,000−14.5% | Reduced |
| HighTower Advisors, LLC | 126,809 | $70.5K | 0.00% | 00.0% | Unchanged |
| DDD Partners, LLC | 120,000 | $66.7K | 0.00% | +5,000+4.3% | Added |
| Susquehanna International Group, LLP | 104,759 | $58.3K | 0.00% | +54,921+110.2% | Added |
| State Street Corp | 88,989 | $49.5K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 81,209 | $45.2K | 0.00% | +72,200+801.4% | Added |
| Renaissance Technologies LLC | 77,800 | $43.3K | 0.00% | +36,769+89.6% | Added |
| Northern Trust Corp | 74,020 | $41.2K | 0.00% | −1,446−1.9% | Reduced |
| Northwestern Mutual Wealth Management Co | 71,730 | $39.9K | 0.00% | 00.0% | Unchanged |
| Disciplined Investments, LLC | 55,886 | $31.1K | 0.01% | 00.0% | Unchanged |
| Americana Partners, LLC | 55,000 | $30.6K | 0.00% | +25,000+83.3% | Added |
| Raymond James Financial Inc | 51,847 | $28.8K | 0.00% | −60.0% | Reduced |
| Integrity Alliance, LLC. | 39,524 | $22.0K | 0.00% | 00.0% | Unchanged |
| Prevail Innovative Wealth Advisors, LLC | 38,306 | $21.3K | 0.00% | 00.0% | Unchanged |
| Highland Capital Management, LLC | 32,454 | $18.0K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 29,015 | $16.1K | 0.00% | +29,015 | New |
| Two Sigma Securities, LLC | 26,794 | $14.9K | 0.00% | +26,794 | New |
| Jane Street Group, LLC | 23,825 | $13.3K | 0.00% | +10,602+80.2% | Added |
| Chicago Partners Investment Group LLC | 18,000 | $12.5K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 21,050 | $11.7K | 0.00% | 00.0% | Unchanged |
| Gleason Group, Inc. | 18,018 | $10.0K | 0.00% | 00.0% | Unchanged |
| HRT Financial LP | 17,578 | $9.00K | 0.00% | −3,380−16.1% | Reduced |
| Centerpoint Advisors, LLC | 15,700 | $9.00K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 13,795 | $7.67K | 0.00% | +11,603+529.3% | Added |
| Flax Pond Capital, LLC | 13,549 | $7.54K | 0.01% | +13,549 | New |
| Simplex Trading, LLC | 7,211 | $4.01K | 0.00% | +1,214+20.2% | Added |
| Deutsche Bank AG | 4,000 | $2.24K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 1,225 | $681 | 0.00% | −983−44.5% | Reduced |
| Bank of America Corp | 907 | $504 | 0.00% | −437−32.5% | Reduced |
| SBI Securities Co., Ltd. | 103 | $57 | 0.00% | −200−66.0% | Reduced |
| Tucker Asset Management LLC | 39 | $22 | 0.00% | +39 | New |
| Allworth Financial LP | 6 | $4 | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 1 | $1 | 0.00% | +1 | New |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −26,714−100.0% | Sold out |
| Diversified Portfolios, Inc. | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −11,044−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −1,496−100.0% | Sold out |
| Barclays PLC | 0 | $0 | 0.00% | −403−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |