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 |
|---|---|---|---|---|---|
| Citigroup Inc | 1 | $1 | 0.00% | +1 | New |
| Allworth Financial LP | 6 | $4 | 0.00% | 00.0% | Unchanged |
| Tucker Asset Management LLC | 39 | $22 | 0.00% | +39 | New |
| SBI Securities Co., Ltd. | 103 | $57 | 0.00% | −200−66.0% | Reduced |
| Bank of America Corp | 907 | $504 | 0.00% | −437−32.5% | Reduced |
| UBS Group AG | 1,225 | $681 | 0.00% | −983−44.5% | Reduced |
| Deutsche Bank AG | 4,000 | $2.24K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 7,211 | $4.01K | 0.00% | +1,214+20.2% | Added |
| Flax Pond Capital, LLC | 13,549 | $7.54K | 0.01% | +13,549 | New |
| Tower Research Capital LLC (TRC) | 13,795 | $7.67K | 0.00% | +11,603+529.3% | Added |
| 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 |
| Gleason Group, Inc. | 18,018 | $10.0K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 21,050 | $11.7K | 0.00% | 00.0% | Unchanged |
| Chicago Partners Investment Group LLC | 18,000 | $12.5K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 23,825 | $13.3K | 0.00% | +10,602+80.2% | Added |
| Two Sigma Securities, LLC | 26,794 | $14.9K | 0.00% | +26,794 | New |
| XTX Topco Ltd | 29,015 | $16.1K | 0.00% | +29,015 | New |
| Highland Capital Management, LLC | 32,454 | $18.0K | 0.00% | 00.0% | Unchanged |
| Prevail Innovative Wealth Advisors, LLC | 38,306 | $21.3K | 0.00% | 00.0% | Unchanged |
| Integrity Alliance, LLC. | 39,524 | $22.0K | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 51,847 | $28.8K | 0.00% | −60.0% | Reduced |
| Americana Partners, LLC | 55,000 | $30.6K | 0.00% | +25,000+83.3% | Added |
| Disciplined Investments, LLC | 55,886 | $31.1K | 0.01% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 71,730 | $39.9K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 74,020 | $41.2K | 0.00% | −1,446−1.9% | Reduced |
| Renaissance Technologies LLC | 77,800 | $43.3K | 0.00% | +36,769+89.6% | Added |
| Rockefeller Capital Management L.P. | 81,209 | $45.2K | 0.00% | +72,200+801.4% | Added |
| State Street Corp | 88,989 | $49.5K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 104,759 | $58.3K | 0.00% | +54,921+110.2% | Added |
| DDD Partners, LLC | 120,000 | $66.7K | 0.00% | +5,000+4.3% | Added |
| HighTower Advisors, LLC | 126,809 | $70.5K | 0.00% | 00.0% | Unchanged |
| Creative Planning | 136,053 | $75.7K | 0.00% | −23,000−14.5% | Reduced |
| BlackRock, Inc. | 199,304 | $110.8K | 0.00% | 00.0% | Unchanged |
| Cambridge Investment Research Advisors, Inc. | 443,000 | $246.0K | 0.00% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 523,109 | $291.0K | 0.00% | −1200.0% | Reduced |
| Simon Quick Advisors, LLC | 603,149 | $335.4K | 0.01% | 00.0% | Unchanged |
| Vanguard Group Inc | 1,322,980 | $735.6K | 0.00% | +45,396+3.6% | Added |
| 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 |