Xiao Jinsong 4

What Happened Xiao Jinsong, CEO of Ultra Clean Holdings, was granted 31,175 restricted stock units (RSUs) on May 22, 2026. The award is reported at a grant price of $0.00 (total value shown as $0 in the filing). This was an equity award (Form 4 code A), not an open-market purchase or sale.

Key Details

• Transaction date: 2026-05-22; Form 4 filed: 2026-05-27 (appears later than the standard 2-business-day Section 16 filing window).
• Transaction type/code: Award/Grant (A).
• Shares granted: 31,175 RSUs; Price at grant: $0.00; reported dollar value: $0.
• Shares owned after transaction: Not specified in the provided filing details.
• Footnote: The RSUs vest over 3 years in equal installments on each anniversary of the vesting commencement date (May 22, 2026).

Context RSU grants are a common form of executive compensation and do not involve an immediate cash purchase or sale. These units convert to actual shares only as they vest according to the schedule above; until vesting, they may be subject to forfeiture and other plan terms. The later-than-typical filing date is noted; delays can occur but are material for disclosure timing.