Company · Ownership research

Zymeworks Inc. ZYME

CIK 0001937653

Form 4 transactions dated Nov 1, 2023 to Nov 10, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 32 rows; the complete set is available through the API.

Insider filings on file run through Oct 9, 2026.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $58.04M
Sold: $6.80M

Nov 1, 2023 – Oct 9, 2026
Available records · partial months are marked ·

202510 of 30 preview events · 32 available in 2025

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 22, 2025	Galbraith Kenneth Chair & CEO · Director	Sale	$1.28M 47,528 shares sold	26.29% sold Direct holding	▾
May 19, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$69.74K 5,919 shares bought	Unavailable Indirect holding	▾
May 15, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$565.85K 49,502 shares bought	Unavailable Indirect holding	▾
Apr 17, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$630.82K 54,760 shares bought	Unavailable Indirect holding	▾
Apr 16, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$825.59K 73,953 shares bought	Unavailable Indirect holding	▾
Apr 4, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$2.19M 196,438 shares bought	Unavailable Indirect holding	▾
Apr 3, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$1.43M 120,770 shares bought	Unavailable Indirect holding	▾
Apr 2, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$881.02K 74,360 shares bought	Unavailable Indirect holding	▾
Apr 1, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$564.65K 48,658 shares bought	Unavailable Indirect holding	▾
Mar 31, 2025	NODELMAN OLEG · EcoR1 Capital, LLC Director · 10% owner	Purchase	$51.66K 4,397 shares bought	Unavailable Indirect holding	▾

Showing 30 / 32 record groups in 2025. The complete set is available through the API.

Zymeworks Inc. · ZYME

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 32 purchase / sale groups and 24 of 24 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"ZYME","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.