CYCLERION THERAPEUTICS INC (CYCN)
Institutional ownership reported to the SEC as of Q2 2026, across 30 quarters.
Institutions report 4,927,718 shares against 4,681,351 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Kalehua Capital Management LLC | $11.2M | 3,302,700 | 3.57% | new | NEW |
| FMR LLC | $2.2M | 649,547 | 0.00% | 13q | +13603.5%+$2.2M |
| Balyasny Asset Management L.P. | $1.1M | 317,511 | 0.00% | new | NEW |
| ADAR1 Capital Management, LLC | $1.0M | 298,757 | 0.05% | new | NEW |
| BRAIDWELL LP | $531.9K | 156,890 | 0.02% | new | NEW |
| CITADEL ADVISORS LLC | $202.7K | 59,795 | 0.00% | 2q | +227.4%+$140.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $155.5K | 45,850 | 0.00% | 13q | -45.8%-$131.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | $104.8K | 30,915 | 0.00% | 2q | +91.6%+$50.1K |
| Rangeley Capital, LLC | $82.4K | 24,310 | 0.08% | new | NEW |
| BlackRock, Inc. | $56.9K | 16,797 | 0.00% | 8q | HELD |
| DIMENSIONAL FUND ADVISORS LP | $39.7K | 11,724 | 0.00% | new | NEW |
| VANGUARD FIDUCIARY TRUST CO | $24.9K | 7,353 | 0.00% | 2q | HELD |
| UBS Group AG | $10.6K | 3,135 | 0.00% | 13q | -7.5% |
| Tower Research Capital LLC (TRC) | $6.3K | 1,849 | 0.00% | new | NEW |
| GROUP ONE TRADING LLC | $651 | 192 | 0.00% | 13q | HELD |
| OSAIC HOLDINGS, INC. | $440 | 130 | 0.00% | 7q | HELD |
| Activest Wealth Management | $339 | 100 | 0.00% | 9q | HELD |
| BARCLAYS PLC | $295 | 87 | 0.00% | new | NEW |
| WHI TRUST Co LLC | $244 | 72 | 0.00% | 3q | HELD |
| HRT FINANCIAL LP | $74 | 22,054 | 0.00% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $14 | 4 | 0.00% | 7q | -20.0% |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G | ADAR1 Capital Management, LLCwith 1 co-filers | 7.0% |
| 2026-08-14 | 13G | BALYASNY ASSET MANAGEMENT L.P.with 4 co-filers | 7.3% |
| 2026-07-20 | 13D/A | Peter M. Hecht INDIVIDUAL | 19.4% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 20 | $16.7M | 4,927,718 | 8 | 3 | 3 | 0.0% |
| Q1 2026 | 17 | $249.0K | 161,922 | 3 | 2 | 1 | 0.0% |
| Q4 2025 | 19 | $376.3K | 296,255 | 3 | 5 | 1 | 0.0% |
| Q3 2025 | 17 | $595.4K | 258,836 | 3 | 1 | 3 | 0.0% |
| Q2 2025 | 17 | $1.1M | 362,816 | 1 | 3 | 4 | 0.0% |
| Q1 2025 | 18 | $931.7K | 373,392 | 0 | 2 | 2 | 0.0% |
| Q4 2024 | 19 | $1.2M | 382,073 | 5 | 2 | 3 | 0.0% |
| Q3 2024 | 15 | $2.7M | 1,042,639 | 0 | 1 | 3 | 0.0% |
| Q2 2024 | 17 | $2.4M | 1,051,710 | 3 | 4 | 3 | 0.0% |
| Q1 2024 | 15 | $3.4M | 1,071,552 | 1 | 4 | 0 | 0.0% |
| Q4 2023 | 15 | $3.5M | 931,233 | 0 | 5 | 5 | 10.0% |
| Q3 2023 | 17 | $3.6M | 931,636 | 2 | 3 | 2 | 11.2% |
| Q2 2023 | 17 | $4.1M | 851,600 | 18 | 0 | 0 | 14.0% |
| Q1 2023 | 28 | $9.1M | 20,768,784 | 4 | 5 | 6 | 1.4% |
| Q4 2022 | 29 | $13.5M | 20,185,175 | 10 | 3 | 4 | 1.9% |
| Q3 2022 | 31 | $18.7M | 21,257,673 | 0 | 4 | 11 | 2.1% |
| Q2 2022 | 35 | $11.7M | 20,904,883 | 4 | 7 | 9 | 2.2% |
| Q1 2022 | 46 | $26.0M | 23,051,679 | 3 | 10 | 17 | 1.5% |
| Q4 2021 | 49 | $41.7M | 23,692,511 | 7 | 11 | 11 | 2.4% |
| Q3 2021 | 58 | $77.8M | 24,691,427 | 11 | 13 | 21 | 2.6% |
| Q2 2021 | 63 | $98.9M | 24,616,229 | 15 | 15 | 20 | 2.9% |
| Q1 2021 | 68 | $62.6M | 22,397,559 | 7 | 22 | 16 | 0.3% |
| Q4 2020 | 69 | $67.1M | 21,887,382 | 16 | 22 | 19 | 0.2% |
| Q3 2020 | 70 | $139.6M | 22,942,391 | 12 | 19 | 23 | 0.1% |
| Q2 2020 | 69 | $104.5M | 17,689,851 | 12 | 18 | 24 | 0.0% |
| Q1 2020 | 71 | $49.1M | 18,534,152 | 17 | 15 | 21 | 0.0% |
| Q4 2019 | 70 | $42.6M | 15,678,662 | 14 | 22 | 17 | 0.0% |
| Q3 2019 | 86 | $237.0M | 19,554,121 | 7 | 35 | 16 | 0.0% |
| Q2 2019 | 96 | $224.0M | 19,560,573 | 92 | 1 | 1 | 0.0% |
| Q1 2019 | 4 | $12.8M | 855,056 | 4 | 0 | 0 | 0.7% |