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Zymeworks Inc. planned insider sales

In the last twelve months insiders at Zymeworks Inc. filed 15 Form 144 notices of planned sales, 839,119 shares worth $20.5 million at the time of filing, from 10 sellers. The latest, filed 9 October 2026: Adam Schayowitz (officer), 13,832 shares worth $349,396, planned for around 9 October 2026 through Morgan Stanley Wealth Management Canada.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
9 October 2026Adam Schayowitzofficer13,832$349,3969 October 202613,832 shares from 9 October 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
6 March 2026Jeffrey T L SmithFormer Officer247,333$6.1 million6 March 2026No matching Form 4 saleMorgan Stanley Wealth Management CanadaExercise of Options; Vesting of Restricted Stock UnitsForm 144
17 February 2026Leone D PattersonFormer officer31,641$715,08717 February 2026No matching Form 4 saleMorgan Stanley Smith BarneyExercise of optionsForm 144
13 February 2026Leone D PattersonFormer officer128,548$3.0 million13 February 2026No matching Form 4 saleMorgan Stanley Smith BarneyExercise of options; Purchased pursuant to Employee Stock Purchase Plan; Vesting of Restricted Stock UnitsForm 144
12 January 2026Mark HollywoodOfficer6,120$141,80012 January 20266,120 shares from 12 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
12 January 2026Leone D PattersonFormer officer6,832$158,29712 January 2026No matching Form 4 saleMorgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
12 January 2026Jeffrey T L SmithOfficer9,310$215,71312 January 20269,310 shares from 12 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
12 January 2026Paul Andrew MooreOfficer9,560$221,50512 January 20269,560 shares from 12 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
12 January 2026Kenneth GalbraithOfficer, Director30,424$704,92412 January 202630,424 shares from 12 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
5 January 2026Smith Jeffrey T LOfficer10,538$280,5225 January 202610,538 shares from 5 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
5 January 2026Paul Andrew MooreOfficer20,110$535,3285 January 202620,110 shares from 5 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
5 January 2026Kenneth GalbraithOfficer, Director54,343$1.4 million5 January 202654,343 shares from 5 January 2026Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
22 December 2025Galbraith, KennethOfficer, Director47,528$1.3 million22 December 202547,528 shares from 22 December 2025Morgan Stanley Wealth Management CanadaVesting of Restricted Stock UnitsForm 144
24 November 2025Derek John Michael MillerFormer Director118,000$2.8 million24 November 2025No matching Form 4 saleMorgan Stanley Smith BarneyExercise of optionsForm 144
21 November 2025Neil GallagherFormer Director105,000$2.5 million21 November 2025No matching Form 4 saleMorgan Stanley Smith BarneyExercise of optionsForm 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?