Suhadolnik Kate Eileen 4

What Happened

• Kate E. Suhadolnik, Chief Financial Officer of ESS Tech, sold 741 shares of common stock in an open-market transaction on February 20, 2026. The shares traded at $1.54 each, generating gross proceeds of $1,141. The filing indicates the sale was to satisfy tax withholding obligations related to the vesting of restricted stock units (RSUs).

Key Details

• Transaction date and price: 2026-02-20, 741 shares at $1.54 per share (total $1,141).
• Transaction type: Sale (reported as open market/private sale) undertaken to cover tax withholding on vested RSUs (footnote F1).
• Security type: A portion of the securities involved are RSUs; each RSU is a contingent right to one share (footnote F2).
• Shares owned after transaction: Not specified in the information provided in this summary.
• Filing timeliness: Report filed on 2026-02-26 (six days after the transaction). Form 4s are generally due within two business days of the transaction, so this filing appears to have been submitted late.

Context

• This sale was a tax-withholding-related disposition tied to RSU vesting, a common and routine insider event that does not necessarily signal a change in the insider's view of the company. Such sales are administrative rather than opportunistic market trades.