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Company

Korsana Biosciences, Inc.

CYCN · CIK 0001755237

SEC FORM 4
$184,301.70

Cyclerion Therapeutics, Inc. (CYCN)

Acquisition (code M) of 55,849 shares at $3.30 per share.

Reporting Person Graul Regina Margaret · Officer Title See Remarks · Transaction Code M

Traded Aug 14, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355707 · filed 2026-08-18 · View filing →

SEC FORM 4
$184,303.91

Cyclerion Therapeutics, Inc. (CYCN)

Disposition (code F) of 48,629 shares at $3.79 per share.

Reporting Person Graul Regina Margaret · Officer Title See Remarks · Transaction Code F

Traded Aug 14, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355707 · filed 2026-08-18 · View filing →

SEC FORM 4
$58,875.00

Cyclerion Therapeutics, Inc. (CYCN)

Acquisition (code M) of 25,000 shares at $2.355 per share.

Reporting Person CHICKO RHONDA M. · Officer Title Chief Financial Officer · Transaction Code M

Traded Aug 14, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001193125-26-355721 · filed 2026-08-18 · View filing →