CYCLERION THERAPEUTICS INC (CYCN) Institutional Ownership Changes & 13F Activity

CYCLERION THERAPEUTICS INC (CYCN). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Kalehua Capital Management Llc, Fmr Llc, Balyasny Asset Management L.P., Adar1 Capital Management, Llc, and Braidwell Lp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Citadel Advisors LlcBuy+101,329+554.9%119,590$405.41KQ2 2026Sep 02, 2026
Kalehua Capital Management LlcBuy+3,302,700—3,302,700$11.20MQ2 2026Aug 19, 2026
Balyasny Asset Management L.P.Buy+317,511—317,511$1.08MQ2 2026Aug 14, 2026
Adar1 Capital Management, LlcBuy+298,757—298,757$1.01MQ2 2026Aug 14, 2026
Braidwell LpBuy+156,890—156,890$531.86KQ2 2026Aug 14, 2026
Rangeley Capital, LlcBuy+24,310—24,310$82.41KQ2 2026Aug 14, 2026
Hrt Financial LpBuy+22,054—22,054$74.00KQ2 2026Aug 14, 2026
Barclays PlcBuy+87—87$295.00Q2 2026Aug 14, 2026
Fmr LlcBuy+644,807+13603.5%649,547$2.20MQ2 2026Aug 13, 2026
Vanguard Capital Management LlcBuy+14,778+91.6%30,915$104.80KQ2 2026Aug 13, 2026
Ubs Group AgSell-256-7.5%3,135$10.63KQ2 2026Aug 13, 2026
Bnp Paribas Financial MarketsSell-1-20.0%4$14.00Q2 2026Aug 13, 2026
Geode Capital Management, LlcSell-38,700-45.8%45,850$155.47KQ2 2026Aug 12, 2026
Dimensional Fund Advisors LpBuy+11,724—11,724$39.74KQ2 2026Aug 11, 2026
Tower Research Capital Llc (Trc)Buy+1,849—1,849$6.27KQ2 2026Aug 11, 2026
Mai Capital ManagementSell-100-100.0%0$0.00Q2 2026May 15, 2026
Morgan StanleySell-1-100.0%0$0.00Q2 2026May 15, 2026
Kovack Advisors, Inc.Sell-10,000-100.0%0$0.00Q2 2026May 13, 2026
Citigroup IncSell-89-100.0%0$0.00Q2 2026May 11, 2026
Caitong International Asset Management Co., LtdSell-4-100.0%0$0.00Q2 2026May 11, 2026
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Frequently asked questions about CYCN activity

  • Which institutional owners are buying CYCN?

    Institutional owners buying CYCN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in CYCN activity?

    "Buy" means an investor increased their reported position in CYCN compared to the prior reporting period. This reflects growing exposure to CYCLERION THERAPEUTICS INC (CYCN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in CYCN increasing?

    Institutional interest in CYCN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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