DONIO ELENA A. 4

What Happened

• Elena A. Donio, a director of Cerebras Systems (CBRS), recorded simultaneous "other acquisition or disposition" transactions on May 15, 2026 for 33,701 shares — one disposed and one acquired entry for the same amount. Both entries are marked as code J (other) and the acquired entry is a derivative. No price is reported (N/A), indicating a non‑cash reclassification/conversion rather than an open‑market buy or sale.

Key Details

• Transaction date: 2026-05-15
• Reported amounts: 33,701 shares disposed and 33,701 shares acquired (derivative); price: N/A
• Transaction code: J (other acquisition/disposition); acquired entry flagged as a derivative
• Shares owned after transaction: not disclosed in the provided filing
• Footnote: Prior to the issuer's IPO, Class A shares (including RSUs/options) were reclassified into Class B in an exempt transaction; each Class B share is convertible into one Class A share (see footnote F1)
• Filing timeliness: no late‑filing indicator provided in the supplied data

Context

• This filing reflects a non‑cash reclassification/conversion between equity forms rather than a market purchase or sale, so it should be viewed as administrative/capitalization‑related activity rather than a direct insider buy or sell signal. The derivative flag and footnote indicate these shares relate to convertible Class B/Class A share mechanics.