Chen Sean Chihhsiang 4

What Happened

• Sean Chen Chihhsiang, President and COO of Ambiq Micro, was granted 64,246 restricted stock units (RSUs) on March 6, 2026. The grant was reported on a Form 4 filed March 10, 2026. The RSUs were awarded at $0.00 (no cash paid) and represent a contingent right to receive one share of common stock upon settlement.

Key Details

• Transaction date: 2026-03-06; Form 4 filed: 2026-03-10 (timely filing).
• Transaction type/code: Award/Grant (A) — RSUs; acquisition price reported as $0.00 (no cash exchanged).
• Vesting: 25% of the RSUs vest on September 1, 2027, then 1/12 of the total shares vest quarterly thereafter (per the Issuer's 2025 Equity Incentive Plan).
• Shares owned after the transaction: not specified in the filing provided.
• Footnote: Each RSU is a contingent right to receive one share upon settlement; vesting is subject to continuous service.

Context

• This was a grant of restricted stock units (a deferred equity award), not an open-market purchase or sale. RSU grants are compensation awards and do not by themselves indicate insider buying or selling sentiment until shares vest and are sold.