13F

Stock

Cyclerion Therapeutics, Inc.

CYCN · held by 17 managers

Reported value

$249K

Holders

17

+3 new · −6 exited

Holders’ est. mark

$17.7K

Price effect on 12 books still in the name

Largest holder

$129.8K

GEODE CAPITAL MANAGEMENT, LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
GEODE CAPITAL MANAGEMENT, LLC84.5K$129.8K$11.5KAdded$74.8K
Citadel18.3K$28KNew
BlackRock, Inc.16.8K$26K$4.7KAdded$4.7K
VANGUARD CAPITAL MANAGEMENT LLC16.1K$24.8KHeld
Kovack Advisors, Inc.10K$15.5KNew
VANGUARD FIDUCIARY TRUST CO7.35K$11.3KHeld
Fidelity4.74K$7.28K$1.26KAdded$1.26K
UBS Group AG3.39K$5.26K$105Added$4.78K
GROUP ONE TRADING LLC192$295$51Added$51
OSAIC HOLDINGS, INC.130$201$36Added$36
MAI Capital Management100$155$28Added$28
Activest Wealth Management100$155$28Added$28
CITIGROUP INC89$137$24Cut−$10.3K
WHI TRUST Co LLC72$112$21Added$21
BNP PARIBAS FINANCIAL MARKETS5$8$2Added$2
Caitong International Asset Management Co., Ltd4$6New
MORGAN STANLEY1$2$0Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.