Cerebras Systems Officer Files Form 144 for Proposed $77.9M Stock Sale

Executive Summary

On September 29, 2026, Dhiraj Mallick, an Officer at Cerebras Systems Inc., filed Form 144 noticing the proposed sale of 396,000 shares of common stock with an estimated aggregate market value of $77,909,040.00. The transaction is being handled through Morgan Stanley Smith Barney LLC.

Transaction & Security Details

• Shares to be Sold: 396,000 common shares
• Aggregate Market Value: $77,909,040.00 (~$196.74 per share implied)
• Shares Outstanding: 112,247,109 (proposed sale represents ~0.35% of total outstanding shares)
• Trading Plan: Executed under a Rule 10b5-1 trading plan adopted on June 30, 2026.

Source of Securities

1. 276,000 shares: Acquired on September 29, 2026, via exercise of stock options from the issuer, paid in cash.
2. 120,000 shares: Acquired on May 13, 2026, upon vesting of Performance Stock Units (PSUs).

Prior Sales (Past 3 Months)

• August 18, 2026: Sold 38,889 common shares generating gross proceeds of $8,642,077.14.

Trading Significance

This filing carries High significance due to the substantial dollar amount ($77.91M) proposed for sale. While executed under a pre-scheduled Rule 10b5-1 plan adopted three months earlier, the scale of insider liquidation represents noteworthy volume relative to typical executive dispositions.