According to the latest Form 4 filing, Cerebras Systems Inc. (ticker: CBRS) Chief Operating Officer Dhiraj Mallick executed multiple transactions in the company’s stock on June 25, 2026. He first converted 69,445 shares of Class B Common Stock into an equal number of Class A shares (transaction code C, reported as an acquisition of 69,445 Class A shares). On the same day, he then sold a total of approximately 105,576 Class A shares through numerous transactions coded S. The filing notes that a substantial portion of these sales were conducted under a “sell to cover” arrangement to satisfy tax withholding obligations upon settlement of RSUs, and thus were not fully discretionary; these transactions are also permitted under the IPO lock-up agreement. After the reported transactions, he still holds about 33,314 Class A shares and roughly 689,696 Class B shares. Despite the tax-driven nature of part of the sales, a sizeable net reduction in shares by a senior executive may be viewed as a modestly negative signal in the short term, and investors should interpret this alongside the company’s fundamentals and lock-up structure.