# CYCLERION THERAPEUTICS INC (CYCN)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/CYCN/

- Reporting holders: 21
- Reported value: $17.0M
- Shares held by institutions: 5,009,567 of 4,681,351 outstanding
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [Kalehua Capital Management LLC](https://holderbook.com/funds/2106181-kalehua-capital-management-llc/) | $11.2M | 3,302,700 | 3.6% | 1 |
| [FMR LLC](https://holderbook.com/funds/315066-fmr-llc/) | $2.2M | 649,547 | 0.0% | 13 |
| [Balyasny Asset Management L.P.](https://holderbook.com/funds/1218710-balyasny-asset-management-l-p/) | $1.1M | 317,511 | 0.0% | 1 |
| [ADAR1 Capital Management, LLC](https://holderbook.com/funds/1940272-adar1-capital-management-llc/) | $1.0M | 298,757 | 0.0% | 1 |
| [BRAIDWELL LP](https://holderbook.com/funds/1920938-braidwell-lp/) | $531.9K | 156,890 | 0.0% | 1 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $405.4K | 119,590 | 0.0% | 2 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $155.5K | 45,850 | 0.0% | 13 |
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $104.8K | 30,915 | 0.0% | 2 |
| [Rangeley Capital, LLC](https://holderbook.com/funds/1517796-rangeley-capital-llc/) | $82.4K | 24,310 | 0.1% | 1 |
| [HRT FINANCIAL LP](https://holderbook.com/funds/1475597-hrt-financial-lp/) | $74.0K | 22,054 | 0.0% | 1 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $56.9K | 16,797 | 0.0% | 8 |
| [DIMENSIONAL FUND ADVISORS LP](https://holderbook.com/funds/354204-dimensional-fund-advisors-lp/) | $39.7K | 11,724 | 0.0% | 1 |
| [VANGUARD FIDUCIARY TRUST CO](https://holderbook.com/funds/933478-vanguard-fiduciary-trust-co/) | $24.9K | 7,353 | 0.0% | 2 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $10.6K | 3,135 | 0.0% | 13 |
| [Tower Research Capital LLC (TRC)](https://holderbook.com/funds/1533421-tower-research-capital-llc-trc/) | $6.3K | 1,849 | 0.0% | 1 |
| [GROUP ONE TRADING LLC](https://holderbook.com/funds/932540-group-one-trading-llc/) | $651 | 192 | 0.0% | 13 |
| [OSAIC HOLDINGS, INC.](https://holderbook.com/funds/1677044-osaic-holdings-inc/) | $440 | 130 | 0.0% | 7 |
| [Activest Wealth Management](https://holderbook.com/funds/1883134-activest-wealth-management/) | $339 | 100 | 0.0% | 9 |
| [BARCLAYS PLC](https://holderbook.com/funds/312069-barclays-plc/) | $295 | 87 | 0.0% | 1 |
| [WHI TRUST Co LLC](https://holderbook.com/funds/2013902-whi-trust-co-llc/) | $244 | 72 | 0.0% | 3 |
| [BNP PARIBAS FINANCIAL MARKETS](https://holderbook.com/funds/1166588-bnp-paribas-financial-markets/) | $14 | 4 | 0.0% | 7 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 21 | $17.0M |
| Q1 2026 | 17 | $249.0K |
| Q4 2025 | 19 | $376.3K |
| Q3 2025 | 17 | $595.4K |
| Q2 2025 | 16 | $604.2K |
| Q1 2025 | 17 | $519.8K |
| Q4 2024 | 19 | $1.2M |
| Q3 2024 | 14 | $2.3M |
| Q2 2024 | 16 | $2.0M |
| Q1 2024 | 15 | $3.4M |
| Q4 2023 | 16 | $3.9M |
| Q3 2023 | 19 | $4.1M |