Williamson Jeremy 4

What Happened

• Jeremy Williamson, Chief Operating Officer of Arq, had 68,600 performance share units (PSUs) vest on February 27, 2026. Those vested PSUs converted into shares of Arq common stock. To satisfy tax withholding obligations, 18,282 shares were withheld at $3.51 per share, representing $64,170. The Form 4 also lists a related conversion entry of 51,467 shares (see footnotes for award details).
• This was a vesting/settlement of equity compensation (an award conversion), not an open-market purchase or discretionary sale. Withholding to cover taxes is routine and does not necessarily indicate a change in insider sentiment.

Key Details

• Transaction date: February 27, 2026; Form 4 filed March 3, 2026 (timely filing).
• Primary event: 68,600 PSUs vested and converted into common shares.
• Tax withholding: 18,282 shares withheld at $3.51/share = $64,170 paid to cover taxes (coded F).
• Related entry: 51,467 PSUs are referenced in the filing and footnotes as the original target award granted March 23, 2023.
• Footnotes: F1 explains the vesting determination; F2 notes share withholding for taxes; F3 notes the maximum eligible vesting was 200% of target.
• Shares owned after the transaction are not specified in the Form 4.

Context

• PSUs are performance-based equity awards that convert to stock when performance and time-based conditions are met. The filing shows conversion/settlement of PSUs into shares and standard withholding to cover tax liabilities (a common, administrative disposition).
• For retail investors, vesting events are routine compensation settlements and should not be treated the same as open-market insider purchases or discretionary sales.