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Regeneron Officer Marion McCourt Files Form 144 to Sell $984K in Common Stock

Low SignificanceOctober 30, 2026 at 4:57:22 PM EDT

REGENERON PHARMACEUTICALS, INC.

$REGN144CIK: 0000872589

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Filing Summary

Form 144 Notice of Proposed Sale of Securities Company: REGENERON PHARMACEUTICALS, INC. (REGN) Insider: Marion McCourt (Officer) Shares to Sell: 1,132 Common Shares Estimated Value: $984,194.76 (~$869.43/share) Broker: UBS Financial Services Inc. Trading Plan: Adopted under Rule 10b5-1 on 02/17/2026

Comprehensive Analysis

Overview

On October 30, 2026, Marion McCourt, an Officer of Regeneron Pharmaceuticals, Inc. (REGN), filed a Form 144 notifying the SEC of a proposed sale of 1,132 shares of common stock. The aggregate market value of the securities to be sold is approximately $984,194.76, implying a share price of roughly $869.43.

Transaction Details

  • Securities to be Sold: 1,132 Common shares
  • Approximate Sale Date: October 30, 2026
  • Acquisition Origin: The shares were acquired on December 12, 2023, through the vesting of restricted stock awards (RSA Vesting) directly from the issuer.
  • Trading Plan: The proposed sale is conducted pursuant to a Rule 10b5-1 trading plan adopted on February 17, 2026.

Recent Transactions (Past 3 Months)

  • September 2, 2026: Sold 1,215 shares for gross proceeds of $1,032,750.00.
  • September 3, 2026: Sold 1,131 shares for gross proceeds of $969,708.09.

Market Impact & Significance

The filing represents routine diversification under a pre-established Rule 10b5-1 trading plan. The transaction volume of 1,132 shares is negligible relative to Regeneron's total shares outstanding of over 101.6 million, indicating low market impact.

Topics:#Regeneron#REGN#Form144#InsiderTrading#Biotech

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