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Korsana Biosciences, Inc. planned insider sales

In the last twelve months insiders at Korsana Biosciences, Inc. filed 4 Form 144 notices of planned sales, 8,249 shares worth $285,323 at the time of filing, from 2 sellers. The latest, filed 22 October 2026: Michael Higgins (director), 1,107 shares worth $35,424, planned for around 22 October 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
22 October 2026Michael HigginsDirector1,107$35,42422 October 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
23 September 2026Errol B De SouzaDirector4,903$171,55623 September 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
22 September 2026Errol B De SouzaDirector100$3,49922 September 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
18 September 2026Errol B De SouzaDirector2,139$74,84418 September 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?