Company · Ownership research

REGENERON PHARMACEUTICALS, INC. REGN

CIK 0000872589

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 58 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 ·

2023, from Nov 1, 202310 of 11 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 27, 2023	BROWN MICHAEL S Director	Sale10b5-1 footnote	$1.84M 2,049 shares sold	62.17% sold Direct holding	▾
Dec 27, 2023	Fenimore Christopher R. SVP Controller	Sale10b5-1 footnote	$2.10M 2,448 shares sold	14.55% sold Direct holding	▾
Dec 22, 2023	Fenimore Christopher R. SVP Controller	Sale10b5-1 footnote	$211.57K 250 shares sold	1.46% sold Direct holding	▾
Dec 21, 2023	Fenimore Christopher R. SVP Controller	Sale10b5-1 footnote	$1.42M 1,680 shares sold	8.96% sold Direct holding	▾
Dec 13, 2023	Bassler Bonnie L Director	Sale10b5-1 footnote	$530.70K 610 shares sold	32.85% sold Direct holding	▾
Dec 11, 2023	McCourt Marion EVP Commercial	Sale10b5-1 footnote	$226.38K 270 shares sold	1.28% sold Direct holding	▾
Dec 5, 2023	MURPHY ANDREW J EVP Research	Sale10b5-1 footnote	$5.34M 6,536 shares sold	9.91% sold Direct holding	▾
Dec 1, 2023	RYAN ARTHUR F Director	Sale10b5-1 footnote	$81.73K 100 shares sold	0.54% sold Direct holding	▾
Nov 14, 2023	MURPHY ANDREW J EVP Research	Sale10b5-1 footnote	$5.19M 6,492 shares sold	9.85% sold Direct holding	▾
Nov 7, 2023	RYAN ARTHUR F Director	Sale10b5-1 footnote	$82.79K 100 shares sold	0.54% sold Direct holding	▾

Showing 11 / 11 record groups in 2023. 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 11 of 11 purchase / sale groups and 30 of 58 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.