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Schayowitz Adam

Disclosed activity across 1 company

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52824
SEC CIK
0002127119

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Zymeworks Inc.ZYME · Entity 4458EVP, Head of R&DOctober 09, 2026October 09, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Zymeworks Inc.

Report date October 09, 2026 · Filed October 09, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect23,205 Ending reported balance After 2026-10-09 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-10-09 · Exercise / conversion · Acquired 37,037 · Balance 37,037

F1: Represents shares of common stock issued upon vesting of one third of the restricted stock units ("RSUs") granted on October 9, 2025.

Row 2 · 2026-10-09 · Sale · Disposed 13,832 · Balance 23,205

F2: Represents shares of common stock sold to cover tax withholding obligations and other applicable fees in connection with the vesting of RSUs pursuant to mandatory "sell to cover" provisions contained in the Reporting Person's applicable RSU grant agreement, and does not represent a discretionary sale by the Reporting Person. The Reporting Person did not sell or otherwise dispose of any of the shares reported on this Form 4 for any reason other than to cover required taxes and fees.

F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $25.85 to $25.88, inclusive. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Restricted Stock UnitSEC Table II · derivative / convertible securityDirect74,074 Reported balance After 2026-10-09 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-10-09 · Exercise / conversion · Disposed 37,037 · Balance 74,074

F4: Each RSU represents the contingent right to receive, upon vesting of the RSU, one share of common stock.

F5: Restricted stock units ("RSUs") granted October 9, 2025; vest in three equal annual installments beginning October 9, 2026.

Filing footnotes · ownership attribution and instrument terms

F1: Represents shares of common stock issued upon vesting of one third of the restricted stock units ("RSUs") granted on October 9, 2025.

F2: Represents shares of common stock sold to cover tax withholding obligations and other applicable fees in connection with the vesting of RSUs pursuant to mandatory "sell to cover" provisions contained in the Reporting Person's applicable RSU grant agreement, and does not represent a discretionary sale by the Reporting Person. The Reporting Person did not sell or otherwise dispose of any of the shares reported on this Form 4 for any reason other than to cover required taxes and fees.

F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $25.85 to $25.88, inclusive. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

F4: Each RSU represents the contingent right to receive, upon vesting of the RSU, one share of common stock.

F5: Restricted stock units ("RSUs") granted October 9, 2025; vest in three equal annual installments beginning October 9, 2026.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 09, 2026 Filed Oct 9, 2026 22:28 UTC Zymeworks Inc. ZYME · Entity 4458 Exercise / conversionRestricted Stock Unit · Derivative 37,037 $0.00 $0.00
Disclosure

SEC source: 0002127119-26-000006 · wk-form4_1791584905.xml · derivative · entry 3

Schayowitz Adam · CIK 0002127119 · EVP, Head of R&D

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,074

Underlying: Common Stock · 37,037 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each RSU represents the contingent right to receive, upon vesting of the RSU, one share of common stock.

F5 · derivative.exercise_date: Restricted stock units ("RSUs") granted October 9, 2025; vest in three equal annual installments beginning October 9, 2026.

F5 · derivative.expiration_date: Restricted stock units ("RSUs") granted October 9, 2025; vest in three equal annual installments beginning October 9, 2026.

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October 09, 2026 Filed Oct 9, 2026 22:28 UTC Zymeworks Inc. ZYME · Entity 4458 SaleCommon Stock 13,832 $25.85 $357,557.20
Disclosure

SEC source: 0002127119-26-000006 · wk-form4_1791584905.xml · nonDerivative · entry 2

Schayowitz Adam · CIK 0002127119 · EVP, Head of R&D

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,205

F2 · kind: Represents shares of common stock sold to cover tax withholding obligations and other applicable fees in connection with the vesting of RSUs pursuant to mandatory "sell to cover" provisions contained in the Reporting Person's applicable RSU grant agreement, and does not represent a discretionary sale by the Reporting Person. The Reporting Person did not sell or otherwise dispose of any of the shares reported on this Form 4 for any reason other than to cover required taxes and fees.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $25.85 to $25.88, inclusive. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

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October 09, 2026 Filed Oct 9, 2026 22:28 UTC Zymeworks Inc. ZYME · Entity 4458 Exercise / conversionCommon Stock 37,037 $0.00 $0.00
Disclosure

SEC source: 0002127119-26-000006 · wk-form4_1791584905.xml · nonDerivative · entry 1

Schayowitz Adam · CIK 0002127119 · EVP, Head of R&D

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,037

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Represents shares of common stock issued upon vesting of one third of the restricted stock units ("RSUs") granted on October 9, 2025.

Read SEC document
April 09, 2026 Filed Apr 10, 2026 20:10 UTC Zymeworks Inc. ZYME · Entity 4458 GrantPerformance Stock Unit · Derivative 76,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-151265 · ownership.xml · derivative · entry 3

Schayowitz Adam · CIK 0002127119 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,000

Underlying: Common Stock · 76,000 shares

Expires not disclosed

F4 · derivative.exercise_price: Each performance restricted stock unit ("PSU") represents a contingent right to receive one share of common stock. The amount reported is the maximum number of PSUs that may be earned upon achievement of certain cumulative total shareholder return ("TSR") goals over a three-year performance period ending on January 12, 2029 (or in some cases at earlier times). Between 50% and 200% of the target number of 38,000 PSUs ("Target Number") may be earned upon achievement of such TSR goals. 50% of the Target Number may be earned upon achievement of relative TSR goals if the Company's TSR for the performance period equals or exceeds a prespecified percentile for the Nasdaq Biotech Index.

F5 · derivative.exercise_price: (Continued from footnote 1) The PSUs will only vest at the end of the three-year performance period if the Reporting Person's service to the Company continues through such time that the board of directors of the Company certifies the achievement of TSR goals, except in certain limited cases (such as if service to the Company is terminated by the Company without cause or in case of a change of control).

F4 · derivative.exercise_date: Each performance restricted stock unit ("PSU") represents a contingent right to receive one share of common stock. The amount reported is the maximum number of PSUs that may be earned upon achievement of certain cumulative total shareholder return ("TSR") goals over a three-year performance period ending on January 12, 2029 (or in some cases at earlier times). Between 50% and 200% of the target number of 38,000 PSUs ("Target Number") may be earned upon achievement of such TSR goals. 50% of the Target Number may be earned upon achievement of relative TSR goals if the Company's TSR for the performance period equals or exceeds a prespecified percentile for the Nasdaq Biotech Index.

F5 · derivative.exercise_date: (Continued from footnote 1) The PSUs will only vest at the end of the three-year performance period if the Reporting Person's service to the Company continues through such time that the board of directors of the Company certifies the achievement of TSR goals, except in certain limited cases (such as if service to the Company is terminated by the Company without cause or in case of a change of control).

F4 · derivative.expiration_date: Each performance restricted stock unit ("PSU") represents a contingent right to receive one share of common stock. The amount reported is the maximum number of PSUs that may be earned upon achievement of certain cumulative total shareholder return ("TSR") goals over a three-year performance period ending on January 12, 2029 (or in some cases at earlier times). Between 50% and 200% of the target number of 38,000 PSUs ("Target Number") may be earned upon achievement of such TSR goals. 50% of the Target Number may be earned upon achievement of relative TSR goals if the Company's TSR for the performance period equals or exceeds a prespecified percentile for the Nasdaq Biotech Index.

F5 · derivative.expiration_date: (Continued from footnote 1) The PSUs will only vest at the end of the three-year performance period if the Reporting Person's service to the Company continues through such time that the board of directors of the Company certifies the achievement of TSR goals, except in certain limited cases (such as if service to the Company is terminated by the Company without cause or in case of a change of control).

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April 09, 2026 Filed Apr 10, 2026 20:10 UTC Zymeworks Inc. ZYME · Entity 4458 GrantRestricted Stock Unit · Derivative 47,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-151265 · ownership.xml · derivative · entry 2

Schayowitz Adam · CIK 0002127119 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,000

Underlying: Common Stock · 47,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock.

F3 · derivative.exercise_date: RSUs vest in four equal annual installments beginning on first anniversary of grant date.

F3 · derivative.expiration_date: RSUs vest in four equal annual installments beginning on first anniversary of grant date.

Read SEC document
April 09, 2026 Filed Apr 10, 2026 20:10 UTC Zymeworks Inc. ZYME · Entity 4458 GrantStock Option (Right to Buy) · Derivative 70,000 $0.00 Strike: $27.35 $0.00
Disclosure

SEC source: 0001193125-26-151265 · ownership.xml · derivative · entry 1

Schayowitz Adam · CIK 0002127119 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,000

Underlying: Common Stock · 70,000 shares

Expires 2036-04-08

F1 · derivative.exercise_date: Stock options vest as follows: (i) 25% of underlying shares of common stock on first anniversary of grant date and (ii) remainder of underlying shares of common stock in 36 equal monthly installments on last day of month following first anniversary of grant date.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.