Clearsign TechnologiesCLIR
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 39 institutions reported holding Clearsign Technologies Corp. (CLIR) in their 13F filings, up 2 from Q2 2025. 7 opened new positions and 5 sold out. The largest holders were Vanguard Group Inc. ($985K), Simon Quick Advisors, LLC ($465K) and Geode Capital Management, LLC ($404K). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Clearsign Technologies Corp.
- CUSIP
- 185064102
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 7 | $48K |
| Exits | 5 | $188K |
All 13F filers, Q2 2025 → Q3 2025: 193,207 shares bought and 495,951 shares sold, net −302,744 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 39 holders
| Vanguard Group Inc. | 0.00% | Add +9.6% | 1,277,584 | $985K |
| Simon Quick Advisors, LLC | 0.02% | No change | 603,149 | $465K |
| Geode Capital Management, LLC | 0.00% | Reduce -5.5% | 523,229 | $404K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | No change | 443,000 | $342K |
| BlackRock, Inc. | 0.00% | No change | 199,304 | $154K |
| Creative Planning | 0.00% | Add +12.1% | 159,053 | $123K |
| HighTower Advisors, LLC | 0.00% | Reduce -1.6% | 126,809 | $98K |
| DDD Partners, LLC | 0.01% | No change | 115,000 | $89K |
| State Street Corp. | 0.00% | No change | 88,989 | $69K |
| Northern Trust Corp. | 0.00% | No change | 75,466 | $58K |
| Northwestern Mutual Wealth Management Co. | 0.00% | No change | 71,730 | $55K |
| Disciplined Investments, LLC | 0.02% | No change | 55,886 | $43K |
| Raymond James Financial Inc. | 0.00% | Add +0.0% | 51,853 | $40K |
| Susquehanna International Group, LLP | 0.00% | Reduce -52.1% | 49,838 | $38K |
| Renaissance Technologies | 0.00% | Reduce -29.3% | 41,031 | $32K |
| Integrity Alliance, Llc. | 0.00% | Reduce -2.0% | 39,524 | $30K |
| Prevail Innovative Wealth Advisors, LLC | 0.01% | No change | 38,306 | $30K |
| Highland Capital Management, LLC | 0.00% | No change | 32,454 | $25K |
| Americana Partners, LLC | 0.00% | No change | 30,000 | $23K |
| Citadel Advisors | 0.00% | Reduce -39.7% | 26,714 | $21K |
| Chicago Partners Investment Group LLC | 0.00% | Reduce -35.7% | 18,000 | $16K |
| Wells Fargo & Company | 0.00% | No change | 21,050 | $16K |
| HRT Financial LP | 0.00% | Reduce -5.3% | 20,958 | $16K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 20,508 | $16K |
| Diversified Portfolios, Inc. | 0.00% | No change | 20,000 | $15K |
| Gleason Group, Inc. | 0.00% | No change | 18,018 | $14K |
| Centerpoint Advisors, LLC | 0.00% | No change | 15,700 | $12K |
| Jane Street Group, LLC | 0.00% | New | 13,223 | $10K |
| Goldman Sachs Group Inc. | 0.00% | New | 11,044 | $9K |
| Rockefeller Capital Management L.P. | 0.00% | New | 9,009 | $7K |
| Simplex Trading, LLC | 0.00% | New | 5,997 | $4K |
| Deutsche Bank AG | 0.00% | No change | 4,000 | $3K |
| UBS Group AG | 0.00% | Reduce -86.3% | 2,208 | $2K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 2,192 | $2K |
| Bank of America Corp. | 0.00% | Reduce -8.1% | 1,344 | $1K |
| Royal Bank of Canada | 0.00% | New | 1,496 | $1K |
| Barclays PLC | 0.00% | Add +660.4% | 403 | $311 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -52.8% | 303 | $234 |
| Allworth Financial LP | 0.00% | No change | 6 | $5 |
"% of holder's portfolio" is CLIR's weight in each manager's 13F, not the share of Clearsign Technologies Corp. the manager owns.