Cerebras Systems CBRS Insider Ownership

Updated Oct 29, 2026

Across the past 12 months, open-market trades by Cerebras Systems insiders were all sales, totaling $415.3 million (2.04Mn shares).

• By number of insiders, Cerebras Systems saw 7 insiders sell on the open market over the past 12 months and none buy.
• Sean Lie (Chief Technology Officer) was the top open-market seller of Cerebras Systems over the past 12 months, with $200.74 million sold (991.29K shares) and the latest sale on October 27, 2026.
• In transactions other than open-market trades, Cerebras Systems insiders received 15K shares in stock awards, acquired 26.53Mn shares through option exercises and conversions, gave up 713.38K shares to cover taxes or exercise prices and gave away 333.11K shares as gifts over the past 12 months.
• According to Business Quant data, insiders at Cerebras Systems reported 62.39Mn shares in total in their latest Form 4 filings, or 27.34% of the 228.2Mn shares outstanding; that total is down 8.79% from 68.4Mn shares at the end of Q2 2026.
• Direct holdings account for 23.94Mn shares (38.37%) of CBRS's insider total, and indirect holdings through trusts, partnerships and family members for 38.45Mn shares (61.63%).
• Holdings in Cerebras Systems stock are reported by 12 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Cerebras Systems' top three insider holders by shares held are Steven Vassallo (Director, 25.9Mn shares), Andrew D. Feldman (CEO, President, 14.06Mn shares) and Benchmark Capital Management Co. VIII, L.L.C. (10% owner, 8.86Mn shares).
• Steven Vassallo holds 41.51% of the combined insider position in Cerebras Systems.
• Institutions accounted for 35.71% of CBRS's outstanding shares in Q2 2026.
• Over the trailing 12 months, 13 insiders reported transactions in CBRS stock across 60 Form 4 filings.
• These insider figures for Cerebras Systems are based on Form 4 filings through October 28, 2026.