Cerebras (CBRS) CTO Lie Sean Sells 53,460 Shares

What Happened
Lie Sean, Chief Technology Officer of Cerebras Systems (CBRS), sold 53,460 shares on September 4, 2026 at a weighted average price of $210.16 for total proceeds of approximately $11,235,154. On the same day he converted and/or exercised 46,141 derivative/Class B shares (zero-dollar amounts reported) into common stock and transferred 16,038 shares as a charitable gift to a donor-advised fund. The sale was executed pursuant to a Rule 10b5-1 trading plan.

Key Details

• Transaction date: 2026-09-04.
• Open-market sale: 53,460 shares; weighted average sale price $210.16 (reported range $210.00–$210.45); proceeds ≈ $11,235,154 (F3, F4).
• Derivative activity: 46,141 shares reported as conversion/exercise entries at $0 (M/C code; derivative) (F1, F5).
• Gift: 16,038 shares transferred to a donor-advised fund (F2).
• 10b5-1 plan: sale conducted under a trading plan adopted May 20, 2026 (F3).
• Shares owned after transaction: not specified in the provided excerpt.
• Filing timeliness: no late-filing flag indicated in the provided data.

Context

• F1 notes the Class B common is convertible into an equal number of Class A shares at the holder’s election and has no expiration; the zero-dollar derivative entries reflect conversion/exercise of previously held derivative securities rather than a cash purchase.
• Gifts to donor-advised funds are charitable transactions and do not necessarily indicate the insider’s market view.
• Sales under a pre‑arranged 10b5‑1 plan are planned disposals and are often scheduled in advance rather than timed to current market signals.