Cerebras Systems Inc. (CBRS) director Eric Vishria reported that entities he controls acquired 44,507 shares of Class A Common Stock on September 21, 2026, through a pro-rata, in-kind distribution by Benchmark Capital Partners VIII, L.P. and its affiliated funds to partners, including members and assignees, without additional consideration. Those entities held 275,854 shares following the transaction. The distribution was made in accordance with a Rule 10b5-1 trading plan adopted by Benchmark Capital Partners VIII, L.P. on May 14, 2026.
Cerebras Systems Inc. (CBRS) director Susan Lior reported a series of “other” transactions in Class A common stock on September 15, 2026 that reflect an internal restructuring rather than open‑market trading. An entity associated with Lior disposed of 451,115 shares indirectly as part of a pro‑rata, in‑kind distribution by Eclipse investment funds to their partners for no additional consideration. In the same distribution, Lior acquired 24,463 shares of Class A common stock directly and 23,734 shares indirectly through an estate‑planning vehicle she controls, bringing her directly held Class A position to 315,124 shares. No Rule 10b5‑1 trading plan is reported for these restructuring transactions.
Cerebras Systems Inc. (CBRS) director Eric Vishria reported an indirect acquisition of Class A Common Stock on September 8, 2026. An entity restructuring resulted in a pro-rata, in-kind distribution of 44,507 shares from Benchmark Capital Partners VIII, L.P. and affiliated funds to their partners, including entities controlled by him. After this non-cash distribution, entities controlled by Eric Vishria held 231,347 shares of Class A Common Stock indirectly. The filing states the transaction was reported as occurring under a Rule 10b5-1 trading plan.
Cerebras Systems Inc. (CBRS) director Steven Vassallo reported indirect sales of a total of 50,000 shares of Class A Common Stock on September 4, 2026, through a revocable family trust. The reported prices are weighted average sale prices across ranges from $209.00–$211.99 per share. Vassallo disclaims beneficial ownership of the trust-held shares except for his proportionate pecuniary interest. A separate irrevocable GST trust associated with him holds 139,618 shares after the reported transactions.
Cerebras Systems Inc. (CBRS) Chief Technology Officer Sean Lie reported multiple equity transactions on September 4, 2026. He exercised 46,141 stock options at $5.48 per share into Class B Common Stock and then converted 46,141 Class B into an equal number of Class A shares.
On the same date he made a bona fide gift of 16,038 Class A shares to a donor-advised fund and sold 53,460 Class A shares at a weighted average price of $210.16 per share pursuant to a Rule 10b5-1 trading plan adopted May 20, 2026. After these transactions he held 289,021 stock options directly and an indirect position through his spouse in Class B shares convertible into 180,600 Class A shares.
Cerebras Systems Inc. (CBRS) reported insider activity by CEO and President Andrew D. Feldman. On September 4, 2026 he exercised a stock option for 37,441 shares of Class B Common Stock at an exercise price of $2.72 per share and converted them into 37,441 Class A Common shares, then reported selling 37,441 Class A shares in multiple transactions, with sale prices disclosed as weighted averages within specified ranges and made pursuant to a Rule 10b5-1 trading plan adopted on May 20, 2026. He also reported an in-kind, pro-rata distribution of 120 Class A shares on September 8, 2026 to the Feldman Bravo Family Trust, which now holds 806 Class A shares indirectly, and continues to hold stock options for 525,000 shares and indirect Class B positions convertible into 50,000 Class A shares in each of two GRATs.
Cerebras Systems Inc. (CBRS) is the issuer for a planned resale of 50,000 shares of Class A common stock under Rule 144 by the Vassallo Family Revocable Trust dated 7/15/02. The shares are expected to be sold through Merrill Lynch on Nasdaq, with an indicated aggregate market value of about $9.52 million.
The filing also lists that the same trust sold 50,000 shares of Class A common stock on August 14, 2026 for proceeds of about $10.91 million. The shares to be sold were originally acquired in a private placement from Cerebras Systems Inc. on May 5, 2016 for cash.
Cerebras Systems Inc. (CBRS) insider Andrew Feldman has filed a notice of proposed sales under Rule 144. The filing covers 37,441 shares of common stock, to be issued via an exercise of stock options for cash on September 4, 2026, with Morgan Stanley Smith Barney LLC as broker.
The notice also lists prior sales of Cerebras common stock during the past three months totaling over 300,000 shares by Feldman and related parties, including transactions identified as occurring under a Rule 10b5-1 trading plan.
Cerebras Systems Inc. (CBRS) received a Rule 144 notice from officer Sean Lie covering the proposed sale of 53,460 shares of common stock, consisting of 7,319 shares from Performance Stock Units vesting on June 5, 2026 and 46,141 shares from stock option exercises on September 4, 2026, through Morgan Stanley Smith Barney LLC.
The filing also lists prior sales of Cerebras common stock during the three months before this notice by Sean Lie and related entities, including several large transactions executed under Rule 10b5‑1 trading plans.
Cerebras Systems Inc. (CBRS) director Susan Lior reported restructuring-related transfers of Class A common stock on September 2, 2026. An entity associated with her disposed of 902,236 shares through a pro-rata, in-kind distribution by Eclipse-affiliated funds to their partners for no additional consideration. She directly received 46,455 shares and an estate-planning vehicle she controls indirectly received 47,470 shares from the same in-kind distributions. Following these transactions, she held 290,661 shares directly, with additional shares held indirectly through controlled entities over which she may be deemed to have voting, investment and dispositive power.