25 institutions reported holding $11.2M of CYCLERION THERAPEUTICS INC (CYCN) in SEC 13F filings for 2026-06-30. Largest institutional holders: Kalehua Capital Management LLC ($5.6M), FMR LLC ($2.2M), Balyasny Asset Management L.P. ($1.1M), ADAR1 Capital Management, LLC ($1.0M), BRAIDWELL LP ($531,857). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Kalehua Capital Management LLC | $5.6M | 1.7M | New |
| 2 | FMR LLC | $2.2M | 649,547 | Added |
| 3 | Balyasny Asset Management L.P. | $1.1M | 317,511 | New |
| 4 | ADAR1 Capital Management, LLC | $1.0M | 298,757 | New |
| 5 | BRAIDWELL LP | $531,857 | 156,890 | New |
| 6 | CITADEL ADVISORS LLC | $202,705 | 59,795 | Added |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $155,471 | 45,850 | Trimmed |
| 8 | VANGUARD GROUP INC | $129,729 | 38,268 | Added |
| 9 | Rangeley Capital, LLC | $82,411 | 24,310 | New |
| 10 | HRT FINANCIAL LP | $74,000 | 22,054 | New |
| 11 | BlackRock, Inc. | $56,942 | 16,797 | Hold |
| 12 | DIMENSIONAL FUND ADVISORS LP | $39,745 | 11,724 | New |
| 13 | UBS Group AG | $10,627 | 3,135 | Trimmed |
| 14 | Tower Research Capital LLC (TRC) | $6,268 | 1,849 | New |
| 15 | GROUP ONE TRADING LLC | $651 | 192 | Hold |
| 16 | OSAIC HOLDINGS, INC. | $440 | 130 | Hold |
| 17 | Activest Wealth Management | $339 | 100 | Hold |
| 18 | BARCLAYS PLC | $295 | 87 | New |
| 19 | WHI TRUST Co LLC | $244 | 72 | Hold |
| 20 | BNP PARIBAS FINANCIAL MARKETS | $14 | 4 | Trimmed |
| 21 | Caitong International Asset Management Co., Ltd | $0 | 0 | Exited |
| 22 | CITIGROUP INC | $0 | 0 | Exited |
| 23 | MORGAN STANLEY | $0 | 0 | Exited |
| 24 | MAI Capital Management | $0 | 0 | Exited |
| 25 | Kovack Advisors, Inc. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30