Cerebras (CBRS) Director Steven Vassallo Sells Shares

What Happened
Steven Vassallo, a director of Cerebras Systems (CBRS), sold a total of 50,000 shares in open-market transactions on September 4, 2026, generating roughly $10.52 million. The sales were executed as three lots: 21,117 shares for $4,430,558 (avg. $209.81), 21,773 shares for $4,580,386 (avg. $210.37), and 7,110 shares for $1,504,192 (avg. $211.56). These transactions are reported as sales (code S).

Key Details

• Transaction date: September 4, 2026 (filed on September 8, 2026). Filing is timely (within the required two business-day window; Sept. 7 was a holiday).
• Lots and reported values:
  • 21,117 shares @ $209.81 = $4,430,558 (weighted-average range reported $209.00–$209.99; Footnote F1)
  • 21,773 shares @ $210.37 = $4,580,386 (weighted-average range reported $210.00–$210.99; Footnote F3)
  • 7,110 shares @ $211.56 = $1,504,192 (weighted-average range reported $211.00–$211.99; Footnote F4)
• Total: 50,000 shares sold for approx. $10,515,136.
• Shares owned after transaction: not specified in the excerpt provided.
• Ownership notes: some securities are held in trusts (revocable family trust and irrevocable GST trust) where Vassallo is a co-trustee; he disclaims beneficial ownership except to the extent of his pecuniary interest (Footnotes F2, F5).
• No 10b5-1 plan or tax-withholding note was disclosed in the provided footnotes.

Context
These were open-market sales by a company director and are reported as dispositions (not purchases). Sales by insiders can be routine (e.g., trust rebalancing or liquidity needs) and are not, by themselves, proof of company prospects. The filing appears timely. If you need the exact per-share breakdown by execution price (beyond the weighted-average ranges), the filing notes the reporter will provide that information upon SEC or shareholder request (Footnotes F1, F3, F4).