Institutional Ownership
Cyclerion Therapeutics Inc
CUSIP 23255M204COMCYCNQ1 2026
13D / 13G Filings
13
Schedule 13D/13G on record
Beneficial Filers
8
Distinct reporting persons
Largest Stake
27.9%
Max % of class reported
Institutional Holders
15
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
13 filings · latest Oct 17, 2025
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Oct 17, 2025 | J. Wood Capital Advisors LLC | 13G | 5.4% | 181.8K | SEC |
| 2 | Aug 14, 2025 | Tyndall Capital Partners, L.P. | 13G/A | 4.8% | 155.2K | SEC |
| 3 | May 15, 2025 | Tyndall Capital Partners, L.P. | 13G/A | 5.1% | 164.8K | SEC |
| 4 | Mar 28, 2025 | Peter M. Hecht | 13D/A | 27.9% | — | SEC |
| 5 | Feb 12, 2025 | American Endowment Foundation | 13G/A | 4.9% | 133.0K | SEC |
| 6 | Feb 12, 2025 | Fmr LLC | 13G/A | 0.2% | 4.7K | SEC |
| 7 | Dec 6, 2024 | Slate Path Capital LP | 13G/A | — | — | SEC |
| 8 | Feb 14, 2024 | Tyndall Capital Partners L P | 13G/A | 6.7% | 164.4K | SEC |
| 9 | Feb 9, 2024 | Fmr LLC | 13G/A | 6.7% | — | SEC |
| 10 | Jan 22, 2024 | Slate Path Capital LP | 13G/A | 14.6% | 357.9K | SEC |
3 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Cyclerion Therapeutics Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Geode Capital Management, LLC | 84.5K | $129.8K |
| 2 | Citadel Advisors LLC | 18.3K | $28.0K |
| 3 | Blackrock, Inc. | 16.8K | $26.0K |
| 4 | Kovack Advisors, Inc. | 10.0K | $15.5K |
| 5 | Fmr LLC | 4.7K | $7.3K |
| 6 | Ubs Group AG | 3.4K | $5.3K |
| 7 | Group One Trading LLC | 192 | $295 |
| 8 | Osaic Holdings, Inc. | 130 | $201 |
| 9 | Mai Capital Management | 100 | $155 |
| 10 | Activest Wealth Management | 100 | $155 |