CYCN Cyclerion Therapeutics, Inc.
Cyclerion Therapeutics, Inc. (CYCN) Institutional Ownership
What the institutions did with CYCN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| Kalehua Capital Management LLC | 3.3M | 66.7% |
| FMR LLC | 649.5K | 13.1% |
| Balyasny Asset Management L.P. | 317.5K | 6.4% |
| ADAR1 Capital Management, LLC | 298.8K | 6.0% |
| BRAIDWELL LP | 156.9K | 3.2% |
| CITADEL ADVISORS LLC | 59.8K | 1.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 45.9K | 0.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 30.9K | 0.6% |
| Rangeley Capital, LLC | 24.3K | 0.5% |
| HRT FINANCIAL LP | 22.1K | 0.4% |
| BlackRock, Inc. | 16.8K | 0.3% |
| DIMENSIONAL FUND ADVISORS LP | 11.7K | 0.2% |
| VANGUARD FIDUCIARY TRUST CO | 7.4K | 0.1% |
| UBS Group AG | 3.1K | 0.1% |
| Tower Research Capital LLC (TRC) | 1.8K | 0.0% |
| GROUP ONE TRADING LLC | 192 | 0.0% |
| OSAIC HOLDINGS, INC. | 130 | 0.0% |
| Activest Wealth Management | 100 | 0.0% |
| BARCLAYS PLC | 87 | 0.0% |
| WHI TRUST Co LLC | 72 | 0.0% |
| BNP PARIBAS FINANCIAL MARKETS | 4 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Kalehua Capital Management LLC | New | 0 | 3.3M | +3.3M |
| FMR LLC | Increased | 4.7K | 649.5K | +644.8K |
| Balyasny Asset Management L.P. | New | 0 | 317.5K | +317.5K |
| ADAR1 Capital Management, LLC | New | 0 | 298.8K | +298.8K |
| BRAIDWELL LP | New | 0 | 156.9K | +156.9K |
| CITADEL ADVISORS LLC | Increased | 18.3K | 59.8K | +41.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 84.6K | 45.9K | -38.7K |
| Rangeley Capital, LLC | New | 0 | 24.3K | +24.3K |
| HRT FINANCIAL LP | New | 0 | 22.1K | +22.1K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 16.1K | 30.9K | +14.8K |
| DIMENSIONAL FUND ADVISORS LP | New | 0 | 11.7K | +11.7K |
| Kovack Advisors, Inc. | Sold Out | 10.0K | 0 | -10.0K |
| Tower Research Capital LLC (TRC) | New | 0 | 1.8K | +1.8K |
| UBS Group AG | Reduced | 3.4K | 3.1K | -256 |
| MAI Capital Management | Sold Out | 100 | 0 | -100 |
| CITIGROUP INC | Sold Out | 89 | 0 | -89 |
| BARCLAYS PLC | New | 0 | 87 | +87 |
| Caitong International Asset Management Co., Ltd | Sold Out | 4 | 0 | -4 |
| MORGAN STANLEY | Sold Out | 1 | 0 | -1 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 5 | 4 | -1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.