Company · Ownership research

IONIS PHARMACEUTICALS INC IONS

CIK 0000874015

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 37 rows; the complete set is available through the API.

Insider filings on file run through Oct 19, 2026.

Insider purchases & sales

Purchased: $1.72M
Sold: $209.37M

Nov 1, 2023 – Oct 19, 2026
Available records · partial months are marked ·

2023, from Nov 1, 202310 of 16 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 28, 2023	Swayze Eric EVP Research	Sale	$1.36M 27,100 shares sold	45.46% sold Direct holding	▾
Dec 28, 2023	PARSHALL B LYNNE Director	Sale	$2.13M 42,525 shares sold	33.99% sold Direct holding	▾
Dec 27, 2023	PARSHALL B LYNNE Director	Sale	$2.51M 50,000 shares sold	37.71% sold Direct holding	▾
Dec 26, 2023	O'NEIL PATRICK R. EVP CLO & General Counsel	Sale	$1.07M 20,825 shares sold	34.04% sold Direct holding	▾
Dec 26, 2023	PARSHALL B LYNNE Director	Sale	$1.29M 25,113 shares sold	23.32% sold Direct holding	▾
Dec 26, 2023	Schneider Eugene EVP, Chf Clinical Develop Ofcr	Sale	$1.29M 25,000 shares sold	40.95% sold Direct holding	▾
Dec 21, 2023	BENNETT C FRANK EVP, Chief Scientific Officer	Sale	$794.21K 16,113 shares sold	19.68% sold Direct holding	▾
Dec 21, 2023	Geary Richard S EVP, Chief Development Officer	Sale	$202.68K 4,112 shares sold	5.34% sold Direct holding	▾
Dec 21, 2023	Monia Brett P Chief Executive Officer · Director	Sale	$862.58K 17,500 shares sold	12.90% sold Direct holding	▾
Dec 20, 2023	BENNETT C FRANK EVP, Chief Scientific Officer	Sale	$322.64K 6,500 shares sold	9.00% sold Direct holding	▾

Showing 16 / 16 record groups in 2023. The complete set is available through the API.

IONIS PHARMACEUTICALS INC · IONS

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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 16 of 16 purchase / sale groups and 30 of 37 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"IONS","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.