Company · Ownership research

REGENERON PHARMACEUTICALS, INC. REGN

CIK 0000872589

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

Insider filings on file run through Nov 6, 2026.

Insider purchases & sales

Purchased: $0.00
Sold: $386.61M

Nov 1, 2023 – Nov 6, 2026
Available records · partial months are marked ·

202610 of 23 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Nov 4, 2026	Pitofsky Jason SVP Controller	Sale	$3.66M 3,883 shares sold	47.61% sold Direct holding	▾
Nov 4, 2026	Pitofsky Jason SVP Controller	Sale	$170.19K 179 shares sold	100.00% sold Indirect holding	▾
Nov 3, 2026	Zoghbi Huda Y Director	Sale	$7.22M 7,439 shares sold	81.37% sold Direct holding	▾
Nov 2, 2026	LAROSA JOSEPH J EVP General Counsel and Secret	Sale	$4.31M 4,466 shares sold	10.30% sold Direct holding	▾
Nov 2, 2026	SING GEORGE L Director	Sale	$20.38M 21,129 shares sold	45.66% sold Direct holding	▾
Nov 2, 2026	POON CHRISTINE A Director	Sale	$7.59M 7,830 shares sold	60.00% sold Direct holding	▾
Oct 30, 2026	Guarini Kathryn Director	Sale10b5-1 footnote	$360.00K 400 shares sold	39.88% sold Direct holding	▾
Oct 30, 2026	McCourt Marion EVP Commercial	Sale10b5-1 footnote	$984.19K 1,132 shares sold	9.43% sold Direct holding	▾
Oct 30, 2026	BROWN MICHAEL S Director	Sale10b5-1 footnote	$1.69M 1,929 shares sold	58.30% sold Direct holding	▾
Oct 14, 2026	MURPHY ANDREW J Co-Chief Scientific Officer	Sale10b5-1 footnote	$3.20M 4,147 shares sold	7.98% sold Direct holding	▾

Showing 23 / 23 record groups in 2026. The complete set is available through the API.

REGENERON PHARMACEUTICALS, INC. · REGN

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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 23 of 23 purchase / sale groups and 30 of 66 other groups; the totals and the monthly series cover the whole window.

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