SCHEDULE 13G Filed 2026-08-14 Event — SEC 0001104659-26-097419 →

ADAR1 Capital Management, LLC → Cyclerion Therapeutics, Inc. CYCN

Stake: — Shares: — Class: Common Stock, no par value

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

7 13D/G filings on this issuer

6 other filings besides this one

Filer Track Record

11 filings by this filer

10 other filings in the data moat

Short Interest · settle 2026-07-31

DTC 2.59

44,969 shares short · +29.2% vs prior

Other 13D/G Filings on Cyclerion Therapeutics, Inc.

Filed	Form	Filer	Stake	Shares
2026-07-20	SCHEDULE 13D/A	Hecht Peter M	—	910,240	view →
2023-05-23	SC	Hecht Peter M	—	—	view →
2023-05-12	SC	Hecht Peter M	—	—	view →
2023-04-03	SC	Hecht Peter M	—	—	view →
2022-11-21	SC	Hecht Peter M	—	—	view →
2021-06-07	SC	Hecht Peter M	—	—	view →

Other Filings by ADAR1 Capital Management, LLC

Filed	Form	Issuer	Stake	Shares
2026-08-14	SCHEDULE 13G	Rein Therapeutics, Inc.	—	—	view →
2026-08-14	SCHEDULE 13G	Pliant Therapeutics, Inc.	—	—	view →
2026-08-14	SCHEDULE 13G	Research Alliance Corporation III	—	—	view →
2026-08-14	SCHEDULE 13G	Editas Medicine, Inc.	—	—	view →
2026-08-14	SCHEDULE 13G	JATT II Acquisition Corp.	—	—	view →
2026-08-14	SCHEDULE 13G	Amanat Acquisition Corp.	—	—	view →
2026-08-14	SCHEDULE 13G	Boundless Bio, Inc.	—	—	view →
2026-06-05	SCHEDULE 13G	Rallybio Corporation RLYB	—	—	view →
2026-06-05	SCHEDULE 13G	InMed Pharmaceuticals, Inc. INM	—	—	view →
2025-04-28	SCHEDULE	Keros Therapeutics, Inc. KROS	13.29%	5,390,964	view →

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