Company · Ownership research

IONIS PHARMACEUTICALS INC IONS

CIK 0000874015

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 73 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 ·

Insiders in this window

202610 of 30 preview events · 73 available in 2026

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 16, 2026	Devers Shannon L. EVP, Chief Human Resources Ofc	Sale	$59.08K 1,357 shares sold	7.08% sold Direct holding	▾
Oct 16, 2026	Swayze Eric EVP Research	Sale	$2.31K 53 shares sold	11.96% sold Indirect holding	▾
Jul 31, 2026	Hayden Michael R Director	Purchase	$258.00K 5,000 shares bought	26.32% added Indirect holding	▾
Jul 30, 2026	Hayden Michael R Director	Purchase	$800.70K 15,000 shares bought	375.00% added Indirect holding	▾
Jul 7, 2026	BENNETT C FRANK EVP, Chief Scientific Officer	Sale10b5-1 footnote	$462.69K 5,536 shares sold	6.87% sold Direct holding	▾
Jul 7, 2026	BENNETT C FRANK EVP, Chief Scientific Officer	Sale10b5-1 footnote	$1.28M 15,000 shares sold	100.00% sold Trust holding	▾
Jul 7, 2026	Diaz Allene M. Director	Sale10b5-1 footnote	$863.64K 10,111 shares sold	72.63% sold Direct holding	▾
Jul 7, 2026	Kordasiewicz Holly B. EVP, Chief Development Officer	Sale10b5-1 footnote	$30.52K 362 shares sold	1.61% sold Direct holding	▾
Jul 1, 2026	KLEIN JOSEPH III Director	Sale10b5-1 footnote	$910.42K 11,518 shares sold	51.12% sold Direct holding	▾
Jun 26, 2026	Baroldi Joseph EVP, Chief Business Officer	Sale10b5-1 footnote	$451.70K 5,635 shares sold	54.69% sold Indirect holding	▾

Showing 30 / 73 record groups in 2026. 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 30 of 73 purchase / sale groups and 30 of 201 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.