Who owns Cyclerion Therapeutics, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.
Institutional ownership of CYCN from SEC Form 13F filings across 15 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 15 institutions disclosed 1.2M shares of Cyclerion Therapeutics, Inc. worth $3.8M — about 27.2% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
15
13F holders
$3.8M
value, 2026 filers
27.2%
of shares outstanding (1.2M sh)
4
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of CYCN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 649,547 | $2.2M | 0.0% | 15.3% | +13603.5% |
| 2 | Balyasny Asset Management L.P.NEW | 317,511 | $1.1M | 0.0% | 7.5% | new |
| 3 | CITADEL ADVISORS LLC | 59,795 | $202,705 | 0.0% | 1.4% | +227.4% |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | 45,850 | $155,471 | 0.0% | 1.1% | -45.8% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 30,915 | $104,802 | 0.0% | 0.7% | -4.2% |
| 6 | HRT FINANCIAL LPNEW | 22,054 | $74 | 0.0% | 0.5% | new |
| 7 | BlackRock, Inc. | 16,797 | $56,942 | 0.0% | 0.4% | 0.0% |
| 8 | VANGUARD FIDUCIARY TRUST CO | 7,353 | $24,927 | 0.0% | 0.2% | 0.0% |
| 9 | UBS Group AG | 3,135 | $10,627 | 0.0% | 0.1% | -7.5% |
| 10 | Tower Research Capital LLC (TRC)NEW | 1,849 | $6,268 | 0.0% | 0% | new |
| 11 | OSAIC HOLDINGS, INC. | 130 | $440 | 0.0% | 0% | 0.0% |
| 12 | Activest Wealth Management | 100 | $339 | 0.0% | 0% | 0.0% |
| 13 | BARCLAYS PLCNEW | 87 | $295 | 0.0% | 0% | new |
| 14 | WHI TRUST Co LLC | 72 | $244 | 0.0% | 0% | 0.0% |
| 15 | BNP PARIBAS FINANCIAL MARKETS | 4 | $14 | 0.0% | 0% | -20.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.