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, Q1 2026
Institutional positions in ClearSign Technologies Corp as of Mar 31, 2026. 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
- 20
- −17 vs. Q4 2025
- Shares held
- 398.5K
- +85.1K (+27.2%) vs. Q4 2025Converted for a 1-for-10 split
- Total value
- $1.74M
- −$6.90K (−0.4%) vs. Q4 2025
- New holders
- 5
- 3 more added
- Sold out
- 22
- 4 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding ClearSign Technologies Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 105,429 | $459.7K | 0.00% | +105,429 | New |
| Simon Quick Advisors, LLC | 60,314 | $263.0K | 0.01% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Geode Capital Management, LLC | 57,683 | $251.5K | 0.00% | +5,372+10.3% | AddedConverted for a 1-for-10 split |
| Cambridge Investment Research Advisors, Inc. | 44,300 | $193.0K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Beacon Pointe Advisors, LLC | 27,173 | $118.5K | 0.00% | +27,173 | New |
| Vanguard Fiduciary Trust Co | 23,460 | $102.3K | 0.00% | +23,460 | New |
| BlackRock, Inc. | 19,503 | $85.0K | 0.00% | −427−2.1% | ReducedConverted for a 1-for-10 split |
| HighTower Advisors, LLC | 12,680 | $55.3K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Creative Planning | 12,355 | $53.9K | 0.00% | −1,250−9.2% | ReducedConverted for a 1-for-10 split |
| DDD Partners, LLC | 12,000 | $52.3K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Rockefeller Capital Management L.P. | 8,120 | $35.4K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Northwestern Mutual Wealth Management Co | 7,172 | $31.3K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Wells Fargo & Company | 2,125 | $9.27K | 0.00% | +20+1.0% | AddedConverted for a 1-for-10 split |
| Gleason Group, Inc. | 1,802 | $7.86K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| Centerpoint Advisors, LLC | 1,560 | $7.00K | 0.00% | −10−0.6% | ReducedConverted for a 1-for-10 split |
| Vanguard Global Advisers, LLC | 1,350 | $5.89K | 0.00% | +1,350 | New |
| Tower Research Capital LLC (TRC) | 1,045 | $4.56K | 0.00% | −335−24.2% | ReducedConverted for a 1-for-10 split |
| Deutsche Bank AG | 400 | $1.74K | 0.00% | 00.0% | UnchangedConverted for a 1-for-10 split |
| SBI Securities Co., Ltd. | 11 | $48 | 0.00% | +1+6.8% | AddedConverted for a 1-for-10 split |
| Group One Trading, L.P. | 9 | $39 | 0.00% | +9 | New |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −10,476−100.0% | Sold outConverted for a 1-for-10 split |
| State Street Corp | 0 | $0 | 0.00% | −8,899−100.0% | Sold outConverted for a 1-for-10 split |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −7,780−100.0% | Sold outConverted for a 1-for-10 split |
| Northern Trust Corp | 0 | $0 | 0.00% | −7,402−100.0% | Sold outConverted for a 1-for-10 split |
| Disciplined Investments, LLC | 0 | $0 | 0.00% | −5,589−100.0% | Sold outConverted for a 1-for-10 split |
| Americana Partners, LLC | 0 | $0 | 0.00% | −5,500−100.0% | Sold outConverted for a 1-for-10 split |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −5,185−100.0% | Sold outConverted for a 1-for-10 split |
| Integrity Alliance, LLC. | 0 | $0 | 0.00% | −3,952−100.0% | Sold outConverted for a 1-for-10 split |
| Prevail Innovative Wealth Advisors, LLC | 0 | $0 | 0.00% | −3,831−100.0% | Sold outConverted for a 1-for-10 split |
| Highland Capital Management, LLC | 0 | $0 | 0.00% | −3,245−100.0% | Sold outConverted for a 1-for-10 split |
| XTX Topco Ltd | 0 | $0 | 0.00% | −2,902−100.0% | Sold outConverted for a 1-for-10 split |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −2,679−100.0% | Sold outConverted for a 1-for-10 split |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −2,383−100.0% | Sold outConverted for a 1-for-10 split |
| Chicago Partners Investment Group LLC | 0 | $0 | 0.00% | −1,800−100.0% | Sold outConverted for a 1-for-10 split |
| HRT Financial LP | 0 | $0 | 0.00% | −1,758−100.0% | Sold outConverted for a 1-for-10 split |
| Flax Pond Capital, LLC | 0 | $0 | 0.00% | −1,355−100.0% | Sold outConverted for a 1-for-10 split |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −721−100.0% | Sold outConverted for a 1-for-10 split |
| UBS Group AG | 0 | $0 | 0.00% | −123−100.0% | Sold outConverted for a 1-for-10 split |
| Bank of America Corp | 0 | $0 | 0.00% | −91−100.0% | Sold outConverted for a 1-for-10 split |
| Tucker Asset Management LLC | 0 | $0 | 0.00% | −4−100.0% | Sold outConverted for a 1-for-10 split |
| Allworth Financial LP | 0 | $0 | 0.00% | −1−100.0% | Sold outConverted for a 1-for-10 split |
| Citigroup Inc | 0 | $0 | 0.00% | −0−100.0% | Sold outConverted for a 1-for-10 split |
| Vanguard Group Inc | – | – | – | – | Not filed |