Cyclerion Therapeutics Inc

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Cyclerion Therapeutics Inc
TickerCYCN
CIK #0001755237
CUSIP23255M105
SectorLife Sciences - Pharmaceutical Preparations
Address301 Binney Street, Cambridge, MA 02142
Source [EDGAR]
CIK Filing 2011 - 2025
[0001755237] 10-K
[0001755237] 10-Q
[0001755237] 3
[0001755237] 4
[0001755237] 8-K
[0001755237] D
[0001755237] SC 13D
[0001755237] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Tyndall Capital Partners L P Cyclerion Therapeutics Inc [2023-09-05] 5.05
Slate Path Capital LP Cyclerion Therapeutics Inc [2023-01-13] 16.5
Slate Path Capital LP Cyclerion Therapeutics Inc [2022-10-21] 16.5
Hecht Peter M Cyclerion Therapeutics Inc [2021-05-14] 7.8
MFN Partners Management LP Cyclerion Therapeutics Inc [2021-02-12] 7.15
Slate Path Capital LP Cyclerion Therapeutics Inc [2020-08-10] 18.3
American Endowment Foundation Cyclerion Therapeutics Inc [2020-02-14] 8.7
FMR LLC Cyclerion Therapeutics Inc [2020-02-07] 0.0
BlackRock Inc Cyclerion Therapeutics Inc [2020-02-07] 5.9
Artal International SCA Cyclerion Therapeutics Inc [2020-02-03] 6.7
EcoR1 Capital LLC Cyclerion Therapeutics Inc [2019-12-27] 6.6
Camber Capital Management LP Cyclerion Therapeutics Inc [2019-06-17] 2013.0
MFN Partners Management LP Cyclerion Therapeutics Inc [2019-04-11] 5.5
Form 3/4/5 Filer 2011 - 2025
Cyclerion Therapeutics, Inc.
Chicko Rhonda M
Hecht Peter M
Higgins Michael J
Greenspan David Gerald
Slate Path Capital LP
Graul Regina Margaret
Katabi Dina
Desouza Errol B
Hyman Steven
McGuire Terrance
Isacson Ole
Mendelsohn Michael
Fanucci Marsha
Lovell Stephanie
Conrades George H
Gjino Anjeza
Gault Cheryl
Busch Andreas
Churchwell Kevin
Wright Christopher I
Currie Mark G
Huyett William
Schulman Amy W
Ironwood Pharmaceuticals Inc
Consylman Gina
Form 13F Holdings
Firm Period DFND Voting Shares
Tyndall Capital Partners L P [2025-06-30] SOLE 155,187 155,187
Siren, L.L.C. [2025-06-30] DFND 116,155 116,155
Geode Capital Management LLC [2025-06-30] DFND 32,735 32,735
Vanguard Group Inc [2025-06-30] SOLE 0 23,490
BlackRock, Inc. [2025-06-30] SOLE 16,797 16,797
UBS Group AG [2025-06-30] DFND 9,727 9,727
FMR LLC [2025-06-30] DFND 4,740 4,740
Tower Research Capital LLC (TRC) [2025-06-30] DFND 2,763 2,763
Morgan Stanley [2025-06-30] DFND 649 649
Group One Trading LLC [2025-06-30] SOLE 192 192
Osaic Holdings Inc [2025-06-30] DFND 0 130
Activest Wealth Management [2025-06-30] SOLE 0 100
MAI Capital Management [2025-06-30] SOLE 0 100
Bank of America Corp /DE/ [2025-06-30] DFND 0 24
SBI Securities Co., Ltd. [2025-06-30] DFND 11 11
Pandora Wealth Inc [2025-06-30] SOLE 11 11
BNP Paribas Financial Markets [2025-06-30] DFND 0 5
Concourse Financial Group Securities Inc [2025-06-30] SOLE 0 0
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