Company · Ownership research

Zymeworks Inc. ZYME

CIK 0001937653

Form 4 transactions dated Nov 1, 2023 to Nov 8, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 54 rows; the complete set is available through the API.

Insider filings on file run through Oct 9, 2026.

Insider purchases & sales

Purchased: $58.04M
Sold: $6.80M

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

20268 of 8 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 9, 2026	Schayowitz Adam EVP, Head of R&D	Sale	$357.56K 13,832 shares sold	37.35% sold Direct holding	▾
Jan 12, 2026	Hollywood Mark EVP & Chief Operating Officer	Sale	$138.76K 6,120 shares sold	4.40% sold Direct holding	▾
Jan 12, 2026	Smith Jeffrey T L EVP & Chief Medical Officer	Sale	$211.09K 9,310 shares sold	25.85% sold Direct holding	▾
Jan 12, 2026	Moore Paul Andrew Chief Scientific Officer	Sale	$216.76K 9,560 shares sold	16.47% sold Direct holding	▾
Jan 12, 2026	Galbraith Kenneth Chair & CEO · Director	Sale	$689.82K 30,424 shares sold	11.83% sold Direct holding	▾
Jan 5, 2026	Smith Jeffrey T L EVP & Chief Medical Officer	Sale	$264.47K 10,538 shares sold	36.48% sold Direct holding	▾
Jan 5, 2026	Galbraith Kenneth Chair & CEO · Director	Sale	$1.36M 54,343 shares sold	Unavailable Direct holding	▾
Jan 5, 2026	Moore Paul Andrew Chief Scientific Officer	Sale	$504.70K 20,110 shares sold	Unavailable Direct holding	▾

Showing 8 / 8 record groups in 2026. 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 8 of 8 purchase / sale groups and 30 of 54 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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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.