CLEARSIGN TECHNOLOGIES CORP
COM · CUSIP 185064102
38
institutional holders
-1 vs Q3 2025
4.5m
shares reported held*
$2.5mreported value*
4 new
9 added
8 reduced
5 sold out
net bought ≈ $127.6k (+229.3k shares)
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $0.56. Options: 2 managers hold calls ($52.7k notional), 2 hold puts ($7.7k).
Trends to Q4 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 28 |
| Q4 2022 | 29 |
| Q1 2023 | 26 |
| Q2 2023 | 28 |
| Q3 2023 | 29 |
| Q4 2023 | 27 |
| Q1 2024 | 28 |
| Q2 2024 | 30 |
| Q3 2024 | 28 |
| Q4 2024 | 32 |
| Q1 2025 | 39 |
| Q2 2025 | 38 |
| Q3 2025 | 39 |
| Q4 2025 | 38 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Bought or addedCut or sold out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2024 | 14 | 9 |
| Q2 2024 | 13 | 10 |
| Q3 2024 | 7 | 9 |
| Q4 2024 | 12 | 6 |
| Q1 2025 | 18 | 6 |
| Q2 2025 | 17 | 11 |
| Q3 2025 | 11 | 16 |
| Q4 2025 | 13 | 13 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
CallsPuts
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2025 | $5.4k | $0 | 0.00 |
| Q2 2025 | $642 | $0 | 0.00 |
| Q3 2025 | $16.9k | $0 | 0.00 |
| Q4 2025 | $52.7k | $7.7k | 0.15 |
Biggest buyers
| Rockefeller Capital Management L.P. | Added | +72.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +54.9k |
| VANGUARD GROUP INC | Added | +45.4k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +36.8k |
| XTX Topco Ltd | New | +29.0k |
| TWO SIGMA SECURITIES, LLC | New | +26.8k |
| Americana Partners, LLC | Added | +25.0k |
| Tower Research Capital LLC (TRC) | Added | +11.6k |
| JANE STREET GROUP, LLC | Added | +10.6k |
| DDD Partners, LLC | Added | +5.0k |
Biggest sellers
| CITADEL ADVISORS LLC | Sold out | -26.7k |
| Creative Planning | Reduced | -23.0k |
| Diversified Portfolios, Inc. | Sold out | -20.0k |
| GOLDMAN SACHS GROUP INC | Sold out | -11.0k |
| HRT FINANCIAL LP | Reduced | -3.4k |
| ROYAL BANK OF CANADA | Sold out | -1.5k |
| NORTHERN TRUST CORP | Reduced | -1.4k |
| UBS Group AG | Reduced | -983 |
| BANK OF AMERICA CORP /DE/ | Reduced | -437 |
| BARCLAYS PLC | Sold out | -403 |
Biggest calls
| GROUP ONE TRADING LLC | New | $51.3k92.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $1.4k2.5k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $7.6k13.6k shares |
| SIMPLEX TRADING, LLC | Unchanged | $55100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| PASQUESI JOHN M 13G · passive investor -0.1 pts · filed 2026-07-24 | 19.9% |
Holders, Q4 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 1.3m $735.6k | Added +45.4k |
| SIMON QUICK ADVISORS, LLC 0.01% of their portfolio | 603.1k $335.4k | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 523.1k $291.0k | Reduced -120 |
| Cambridge Investment Research Advisors, Inc. 0.00% of their portfolio | 443.0k $246.0k | Unchanged |
| BlackRock, Inc. 0.00% of their portfolio | 199.3k $110.8k | Unchanged |
| Creative Planning 0.00% of their portfolio | 136.1k $75.7k | Reduced -23.0k |
| HighTower Advisors, LLC 0.00% of their portfolio | 126.8k $70.5k | Unchanged |
| DDD Partners, LLC 0.00% of their portfolio | 120.0k $66.7k | Added +5.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 104.8k $58.3k | Added +54.9k |
| STATE STREET CORP 0.00% of their portfolio | 89.0k $49.5k | Unchanged |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 81.2k $45.2k | Added +72.2k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 77.8k $43.3k | Added +36.8k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 74.0k $41.2k | Reduced -1.4k |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO 0.00% of their portfolio | 71.7k $39.9k | Unchanged |
| Disciplined Investments, LLC 0.01% of their portfolio | 55.9k $31.1k | Unchanged |
| Americana Partners, LLC 0.00% of their portfolio | 55.0k $30.6k | Added +25.0k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 51.8k $28.8k | Reduced -6 |
| INTEGRITY ALLIANCE, LLC. 0.00% of their portfolio | 39.5k $22.0k | Unchanged |
| PREVAIL INNOVATIVE WEALTH ADVISORS, LLC 0.00% of their portfolio | 38.3k $21.3k | Unchanged |
| HIGHLAND CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 32.5k $18.0k | Unchanged |
| XTX Topco Ltd 0.00% of their portfolio | 29.0k $16.1k | New |
| TWO SIGMA SECURITIES, LLC 0.00% of their portfolio | 26.8k $14.9k | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 23.8k $13.2k | Added +10.6k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 21.1k $11.7k | Unchanged |
| Gleason Group, Inc. 0.00% of their portfolio | 18.0k $10.0k | Unchanged |
| Chicago Partners Investment Group LLC 0.00% of their portfolio | 18.0k $12.5k | Unchanged |
| HRT FINANCIAL LP 0.00% of their portfolio | 17.6k $9.0k | Reduced -3.4k |
| Centerpoint Advisors, LLC 0.00% of their portfolio | 15.7k $9.0k | Unchanged |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 13.8k $7.7k | Added +11.6k |
| FLAX POND CAPITAL, LLC 0.01% of their portfolio | 13.5k $7.5k | First filing |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 7.2k $4.0k | Added +1.2k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 4.0k $2.2k | Unchanged |
| UBS Group AG 0.00% of their portfolio | 1.2k $681 | Reduced -983 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 907 $504 | Reduced -437 |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 103 $57 | Reduced -200 |
| TUCKER ASSET MANAGEMENT LLC 0.00% of their portfolio | 39 $22 | New |
| Allworth Financial LP 0.00% of their portfolio | 6 $4 | Unchanged |
| CITIGROUP INC 0.00% of their portfolio | 1 $1 | New |