MongoDB Director & Co-Founder Dwight Merriman Files Form 144 to Sell $4.68M in Stock

Executive Summary

On October 8, 2026, Dwight A. Merriman, Director and Co-Founder of MongoDB, Inc. ($MDB), filed a Form 144 notice of proposed sale covering an aggregate of 13,000 shares of common stock with an estimated market value of $4,677,648.82 (approx. $359.82 per share).

Transaction Breakdown

The proposed sale comprises two components:

• Direct Account (Dwight Merriman): 10,000 shares (~$3,598,428.05)
• Indirect Account (DAM 2012 Trust LLC): 3,000 shares (~$1,079,220.77)
• Broker: Wells Fargo Clearing Services
• Acquisition Origin: Founder's Shares acquired on October 18, 2017 from the issuer.

Rule 10b5-1 Plan & Prior Activity

• 10b5-1 Adoption Date: July 8, 2026. The proposed transaction adheres to pre-established scheduled selling parameters.
• Sales in Past 3 Months:
  • July 14, 2026: 10,000 shares ($3,201,794.22) – Dwight Merriman
  • July 16, 2026: 6,000 shares ($1,976,557.42) – DAM 2012 Trust LLC
  • August 14, 2026: 10,000 shares ($4,704,548.61) – Dwight Merriman
  • August 17, 2026: 6,000 shares ($2,709,654.97) – DAM 2012 Trust LLC

Market Impact & Significance

• Significance: Medium
• While the headline sale value is significant at ~$4.68M, the 13,000 shares represent less than 0.02% of MongoDB's 80,556,341 shares outstanding.
• Given the structured cadence of monthly dispositions under an established Rule 10b5-1 trading plan adopted three months prior, this represents planned portfolio diversification rather than opportunistic discretionary selling.