Cyclerion Therapeutics, Inc. - CYCN
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 84,550 | 129 | 0.0% | 0.0% | 1 | +41,248 | 95.26% | Q1 2026 | May 15, 2026 |
| TWO SIGMA ADVISERS, LP | History | No change | 28,300 | 35 | 0.0% | 0.0% | 2 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| VANGUARD GROUP INC | History | No change | 23,490 | 29 | 0.0% | 0.0% | 3 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| CITADEL ADVISORS LLC | History | New | 18,261 | 28 | 0.0% | — | 4 | +18,261 | New | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | No change | 16,797 | 26 | 0.0% | 0.0% | 5 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 16,137 | 24 | 0.0% | — | 6 | +16,137 | New | Q1 2026 | May 15, 2026 |
| Kovack Advisors, Inc. | History | New | 10,000 | 15 | 0.0% | — | 7 | +10,000 | New | Q1 2026 | May 12, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 7,353 | 11 | 0.0% | — | 8 | +7,353 | New | Q1 2026 | May 08, 2026 |
| FMR LLC | History | No change | 4,740 | 7 | 0.0% | 0.0% | 9 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| UBS Group AG | History | Added to | 3,391 | 5 | 0.0% | — | 10 | +3,015 | 801.86% | Q1 2026 | May 05, 2026 |
| Siren, L.L.C. | History | Closed out | 0 | 0 | — | 0.0% | — | -115,603 | -100.0% | Q1 2026 | May 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -41,555 | -100.0% | Q1 2026 | May 15, 2026 |
| XTX Topco Ltd | History | Closed out | 0 | 0 | — | 0.0% | — | -10,027 | -100.0% | Q1 2026 | May 15, 2026 |
| CITIGROUP INC | History | Reduced | 89 | 0 | — | 0.0% | — | -8,115 | -98.92% | Q1 2026 | May 11, 2026 |
| Tower Research Capital LLC (TRC) | History | Closed out | 0 | 0 | — | 0.0% | — | -3,154 | -100.0% | Q1 2026 | May 15, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Closed out | 0 | 0 | — | — | — | -107 | -100.0% | Q1 2026 | May 15, 2026 |
| Caitong International Asset Management Co., Ltd | History | New | 4 | 0 | — | — | — | +4 | New | Q1 2026 | May 11, 2026 |
| MORGAN STANLEY | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| GROUP ONE TRADING LLC | History | No change | 192 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| MAI Capital Management | History | No change | 100 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 5 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 12, 2026 |
| OSAIC HOLDINGS, INC. | History | No change | 130 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Activest Wealth Management | History | No change | 100 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 15, 2026 |
| WHI TRUST Co LLC | History | No change | 72 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 24, 2026 |