CYCN
CYCLERION THERAPEUTICS, INC.Marquee-fund ownership over time
This quarter's activity
New positions opened
Positions exited
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Citadel Advisors | Q2 2026(8Q snapshot) | 1Q | $3.12 | $3.02 | -3% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Two Sigma Investments | Q4 2025 | Q2 2026 | → $3.12 | +129% |
| Renaissance Technologies | Q1 2025 | Q2 2025 | → $3.05 | +1% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at Cyclerion Therapeutics, Inc.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from Aug 11, 2025 — the most recent Form 4 on file — not from today.
- Form 40000950170-25-106532Aug 11, 2025
- Form 40000950170-25-046280Mar 27, 2025
- Form 40000950170-25-046099Mar 27, 2025
- Form 40000902664-24-006775Nov 25, 2024
- Form 40000950170-24-092733Aug 7, 2024
- Form 40000950170-24-007920Jan 26, 2024
- Form 40000950170-24-007917Jan 26, 2024
- Form 40000950170-23-067740Dec 4, 2023
- Form 40000950170-23-067738Dec 4, 2023
- Form 40000950170-23-067736Dec 4, 2023
- Form 40000950170-23-067734Dec 4, 2023
- Form 40000899243-23-018047Aug 11, 2023
- Form 40001140361-23-026101May 22, 2023
- Form 4/Aamend0001140361-22-027144Jul 27, 2022
- Form 40001140361-22-026995Jul 26, 2022
Fundamentals
XBRL · CYCLERION THERAPEUTICS, INC.Annual figures sourced directly from CYCLERION THERAPEUTICS, INC.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for Cyclerion Therapeutics, Inc. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- S-4/ARegistration (M&A, amended)Jun 9, 2026
- 10-QQuarterly reportMay 12, 2026
- 10-K/AAnnual report (amended)Apr 30, 2026
- S-4Registration (M&A)Apr 20, 2026
- 8-KMaterial eventApr 1, 2026
- 10-KAnnual reportMar 30, 2026
- 8-KMaterial eventFeb 17, 2026
- 8-KMaterial eventJan 6, 2026
- 8-KMaterial eventDec 1, 2025
- 10-QQuarterly reportNov 12, 2025
- 10-K/AAnnual report (amended)Nov 12, 2025
- 8-KMaterial eventSep 23, 2025
- 10-QQuarterly reportAug 5, 2025
- 8-KMaterial eventJun 18, 2025
- 8-KMaterial eventMay 7, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Citadel Advisors | Q2 2026 | open | $3.12 | $3.02 | -3% |
| Two Sigma Investments | Q4 2025 | Q2 2026 | $1.36 | $3.12 | +129% |
| Renaissance Technologies | Q1 2025 | Q2 2025 | $3.03 | $3.05 | +1% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.