Stefan A Dyckerhoff Files Form 144 Notice of Proposed Sale for $4.7M in Astera Labs ($ALAB)

Summary of Proposed Transaction

On October 7, 2026, affiliate Stefan A Dyckerhoff submitted a Form 144 filing indicating an intention to sell up to 12,499 shares of Astera Labs, Inc. common stock through Stifel Nicolaus & Company Inc., representing an aggregate market value of approximately $4.70 million (~$376.06 per share).

Key Filing Details

• Issuer: Astera Labs, Inc. (CIK: 0001736297)
• Reporting Person: Stefan A Dyckerhoff (CIK: 0001484394)
• Relationship: Affiliate
• Shares Proposed for Sale: 12,499 shares
• Shares Outstanding: 173,490,000 shares (<0.01% of total outstanding)
• Trading Plan: The proposed transaction is executed pursuant to a Rule 10b5-1 trading plan adopted on December 1, 2025.
• Ownership Structure:
  • 8,333 shares held via trust where Mr. Dyckerhoff acts as trustee
  • 3,505 shares held in an Individual Retirement Account (IRA)
  • 661 shares held via a limited partnership affiliated with his trust

Prior Sales Within Past 3 Months

Mr. Dyckerhoff previously completed two sales under identical block sizes:

• September 2, 2026: 12,499 shares for gross proceeds of $3,436,755.00 (~$274.96/share)
• August 6, 2026: 12,499 shares for gross proceeds of $3,897,584.00 (~$311.83/share)

Market Impact & Significance

Trading significance is rated Low. The transaction volume constitutes a negligible fraction of Astera Labs' 173.49M outstanding shares and is part of a pre-established Rule 10b5-1 programmatic selling schedule.