Corcept Therapeutics Officer Files Form 144 to Sell $1.15M in Common Stock Under 10b5-1 Plan

Insider Filing Analysis: Form 144

Company: Corcept Therapeutics Inc ($CORT)
Insider: Joseph Douglas Lyon, Officer
Filing Date: October 1, 2026

Transaction Overview

Officer Joseph Douglas Lyon submitted a Form 144 notice disclosing an intention to sell 10,000 shares of common stock through Stifel Nicolaus, with an aggregate market value of approximately $1,152,300 ($115.23 per share).

Key Observations

• Acquisition Origin: The shares are being acquired on the same date (10/01/2026) via a stock option exercise paid in cash from the issuer.
• Pre-Arranged Trading Plan: The proposed sale is executed pursuant to a Rule 10b5-1 trading plan adopted on June 10, 2026, indicating this is a scheduled transaction rather than a discretionary market-timing trade.
• Recent Selling Activity: In the preceding three months, the insider sold:
  • 1,540 shares on August 3, 2026, for gross proceeds of $175,725.77
  • 10,000 shares on September 14, 2026, for gross proceeds of $1,134,423.74
• Market Impact: The 10,000 shares represent less than 0.01% of the 108.1 million outstanding common shares, presenting minimal market absorption pressure.