Marion McCourt - Sep 1, 2023 Form 4 Insider Report for REGENERON PHARMACEUTICALS, INC. (REGN)

Role: EVP Commercial
Signature: /s/** Marion McCourt
Stock symbol: REGN
Transactions as of: Sep 1, 2023
Transactions value $: -$208,638
Form type: 4
Date filed: 9/6/2023, 04:03 PM
Previous filing: Aug 3, 2023
Next filing: Oct 3, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	REGN	Common Stock	Sale	-$209K	-250	-1.25%	$834.55	19.8K	Sep 1, 2023	Direct	F1
holding	REGN	Common Stock						158	Sep 1, 2023	By 401(k) Plan

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id	Content
F1	Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on February 16, 2023.