# CLEARSIGN TECHNOLOGIES CORP (CLIR)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/CLIR/

- Reporting holders: 26
- Reported value: $1.8M
- Shares held by institutions: 487,661 of 6,807,455 outstanding
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $386.9K | 105,429 | 0.0% | 2 |
| [Cambridge Investment Research Advisors, Inc.](https://holderbook.com/funds/1419186-cambridge-investment-research-advisors-inc/) | $326.0K | 88,600 | 0.0% | 2 |
| [SIMON QUICK ADVISORS, LLC](https://holderbook.com/funds/1692038-simon-quick-advisors-llc/) | $221.4K | 60,314 | 0.0% | 2 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $188.9K | 51,457 | 0.0% | 2 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $150.9K | 41,130 | 0.0% | 1 |
| [Beacon Pointe Advisors, LLC](https://holderbook.com/funds/1744317-beacon-pointe-advisors-llc/) | $99.7K | 27,173 | 0.0% | 2 |
| [VANGUARD FIDUCIARY TRUST CO](https://holderbook.com/funds/933478-vanguard-fiduciary-trust-co/) | $86.1K | 23,460 | 0.0% | 2 |
| [HighTower Advisors, LLC](https://holderbook.com/funds/1462245-hightower-advisors-llc/) | $83.2K | 22,662 | 0.0% | 2 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $71.6K | 19,503 | 0.0% | 2 |
| [DDD Partners, LLC](https://holderbook.com/funds/1729673-ddd-partners-llc/) | $44.0K | 12,000 | 0.0% | 2 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $37.0K | 10,080 | 0.0% | 1 |
| [Rockefeller Capital Management L.P.](https://holderbook.com/funds/1739439-rockefeller-capital-management-l-p/) | $29.8K | 8,120 | 0.0% | 2 |
| [NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO](https://holderbook.com/funds/1141802-northwestern-mutual-wealth-management-co/) | $26.3K | 7,172 | 0.0% | 2 |
| [WELLS FARGO & COMPANY/MN](https://holderbook.com/funds/72971-wells-fargo-company-mn/) | $7.8K | 2,125 | 0.0% | 2 |
| [Gleason Group, Inc.](https://holderbook.com/funds/1822632-gleason-group-inc/) | $6.6K | 1,802 | 0.0% | 2 |
| [Centerpoint Advisors, LLC](https://holderbook.com/funds/1733788-centerpoint-advisors-llc/) | $6.0K | 1,560 | 0.0% | 2 |
| [Tower Research Capital LLC (TRC)](https://holderbook.com/funds/1533421-tower-research-capital-llc-trc/) | $5.6K | 1,518 | 0.0% | 2 |
| [Vanguard Global Advisers, LLC](https://holderbook.com/funds/1811242-vanguard-global-advisers-llc/) | $5.0K | 1,350 | 0.0% | 2 |
| [ROYAL BANK OF CANADA](https://holderbook.com/funds/1000275-royal-bank-of-canada/) | $3.0K | 684 | 0.0% | 1 |
| [Integrated Wealth Concepts LLC](https://holderbook.com/funds/1737109-integrated-wealth-concepts-llc/) | $2.5K | 687 | 0.0% | 1 |
| [DEUTSCHE BANK AG\](https://holderbook.com/funds/948046-deutsche-bank-ag/) | $1.5K | 400 | 0.0% | 2 |
| [MERCER GLOBAL ADVISORS INC /ADV](https://holderbook.com/funds/853758-mercer-global-advisors-inc-adv/) | $1.0K | 281 | 0.0% | 1 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $367 | 100 | 0.0% | 1 |
| [BARCLAYS PLC](https://holderbook.com/funds/312069-barclays-plc/) | $121 | 33 | 0.0% | 1 |
| [SBI Securities Co., Ltd.](https://holderbook.com/funds/1851815-sbi-securities-co-ltd/) | $44 | 12 | 0.0% | 2 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 26 | $1.8M |
| Q1 2026 | 21 | $1.8M |
| Q4 2025 | 39 | $2.5M |
| Q3 2025 | 39 | $3.3M |
| Q2 2025 | 38 | $2.5M |
| Q1 2025 | 37 | $3.1M |
| Q4 2024 | 31 | $4.8M |
| Q3 2024 | 27 | $2.7M |
| Q2 2024 | 28 | $2.6M |
| Q1 2024 | 27 | $2.9M |
| Q4 2023 | 27 | $3.1M |
| Q3 2023 | 30 | $3.3M |