KOUNINIS EFSTATHIOS A 4

What Happened

• Efstathios A. Kouninis, SVP and Chief Accounting Officer of Pegasystems, had 332 restricted stock units (RSUs convertable to common shares) vest/convert on March 7, 2026. The RSUs converted into shares at no cash cost. To cover tax withholding, 81 shares were surrendered/withheld at $47.24 per share, producing proceeds of $3,826. Net shares retained from this vesting were 251 (332 vested minus 81 withheld).
• This was a routine equity-compensation vesting and tax-withholding event, not an open-market buy or discretionary sale.

Key Details

• Transaction date: 2026-03-07; Form 4 filed: 2026-03-10.
• Reported entries: 332 shares acquired on conversion of derivative (RSUs) at $0.00; 81 shares disposed for tax withholding at $47.24 each (total $3,826).
• Shares retained from this vesting: 251 (332 vested − 81 withheld). The filing does not report total shares beneficially owned after the transaction.
• Footnotes: F1 = each RSU equals one share on vesting; F2 = this award vests 25% on the Date Exercisable (this event) with the remaining 75% vesting in equal quarterly amounts over the next 3 years.
• Codes: M = exercise/conversion of derivative (RSU conversion); F = payment of tax liability via share withholding.

Context

• This was a standard RSU vesting with share withholding to cover taxes (a common, routine administrative transaction), not an investment purchase or a discretionary open-market sale. Such withholding is a neutral signal regarding insider sentiment.