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Cyclerion Therapeutics Inc (CYCN)

CUSIP: 23255M204 | NYSE | Healthcare · Biotechnology | Micro Cap | 56 institutional holders

Quarters

Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13D/APeter M. Hecht910,24019.4%New 5%+ stakeJul 16, 2026No 13F filer matched
13GBAM GP LLC317,5117.3%New 5%+ stakeJun 30, 2026

Institutional Holders — Q2 2026

Kalehua Capital Management LLC1,651,350
3.2% of portfolio›$5.6M
FMR LLC649,547
0.0% of portfolio›$2.2M
Balyasny Asset Management L.P.317,511
0.0% of portfolio›$1.1M
Adar1 Capital Management, LLC298,757
0.0% of portfolio›$1.0M
Braidwell LP156,890
0.0% of portfolio›$531.9K
Citadel Advisors LLC59,795
0.0% of portfolio›$202.7K
Geode Capital Management, LLC45,850
0.0% of portfolio›$155.5K
Vanguard Capital Management LLC30,915
0.0% of portfolio›$104.8K
Rangeley Capital, LLC24,310
0.1% of portfolio›$82.4K
HRT Financial LP22,054
0.0% of portfolio›$74
BlackRock, Inc.16,797
0.0% of portfolio›$56.9K
Dimensional Fund Advisors LP11,724
0.0% of portfolio›$39.7K
Vanguard Fiduciary Trust Co7,353
0.0% of portfolio›$24.9K
UBS Group AG3,135
0.0% of portfolio›$10.6K
Tower Research Capital LLC (TRC)1,849
0.0% of portfolio›$6.3K
Group One Trading LLC192
0.0% of portfolio›$651
Osaic Holdings, Inc.130
0.0% of portfolio›$440
Activest Wealth Management100
0.0% of portfolio›$339
Barclays PLC87
0.0% of portfolio›$295
WHI Trust Co LLC72
0.0% of portfolio›$244
BNP Paribas Financial Markets4
0.0% of portfolio›$14
StyleTurnoverLocationFiled
Kalehua Capital Management LLC
1,651,350$5.6M3.2%CoreMediumDallas, TX2026-08-19
FMR LLC
649,547$2.2M0.0%GrowthMediumBoston, MA2026-08-13
Balyasny Asset Management L.P.
317,511$1.1M0.0%CoreVery HighChicago, IL2026-08-14
Adar1 Capital Management, LLC
298,757$1.0M0.0%ValueHighAustin, TX2026-08-14
Braidwell LP
156,890$531.9K0.0%CoreHighStamford, CT2026-08-14
Citadel Advisors LLC
59,795$202.7K0.0%CoreVery HighMiami, FL2026-09-02
Geode Capital Management, LLC
45,850$155.5K0.0%IndexVery LowBoston, MA2026-08-12
Vanguard Capital Management LLC
30,915$104.8K0.0%CoreN/AMalvern, PA2026-08-13
Rangeley Capital, LLC
24,310$82.4K0.1%YieldVery HighNew Canaan, CT2026-08-14
HRT Financial LP
22,054$740.0%GARPVery HighNew York, NY2026-08-14
BlackRock, Inc.
16,797$56.9K0.0%IndexVery LowNew York, NY2026-08-07
Dimensional Fund Advisors LP
11,724$39.7K0.0%IndexLowAustin, TX2026-08-11
Vanguard Fiduciary Trust Co
7,353$24.9K0.0%CoreN/AMalvern, PA2026-08-13
UBS Group AG
3,135$10.6K0.0%CoreMediumZurich, Switzerland2026-08-13
Tower Research Capital LLC (TRC)
1,849$6.3K0.0%GARPVery HighNew York, NY2026-08-11
Group One Trading LLC
192$6510.0%ValueVery HighChicago, IL2026-08-14
Osaic Holdings, Inc.
130$4400.0%IndexLowScottsdale, AZ2026-08-14
Activest Wealth Management
100$3390.0%ETFLowAventura, FL2026-07-16
Barclays PLC
87$2950.0%CoreMediumLondon, United Kingdom2026-08-14
WHI Trust Co LLC
72$2440.0%ETFVery LowChicago, IL2026-08-11
BNP Paribas Financial Markets
4$140.0%CoreMediumParis, India2026-08-13
No 13F filer matched
13GAdar1 Capital Management, LLC298,7577.0%New 5%+ stakeJun 30, 2026No 13F filer matched
13D/APeter M. Hecht910,240
19.4% of class · Jul 16, 2026New 5%+ stake
No 13F filer matched
13GBAM GP LLC317,511
7.3% of class · Jun 30, 2026New 5%+ stake
No 13F filer matched
13GAdar1 Capital Management, LLC298,757
7.0% of class · Jun 30, 2026New 5%+ stake
No 13F filer matched