BRESSNER GLEN R 4

What Happened
Glen R. Bressner, a director of Innovative Solutions & Support, was granted 5,618 restricted stock units (RSUs) on April 16, 2026. The grant is reported at a $0.00 acquisition price (standard for RSU awards) and each RSU represents the right to receive one share of common stock. The RSUs are scheduled to vest on the first anniversary of the grant date (April 16, 2027), subject to Bressner’s continued service.

Key Details

• Transaction date: 2026-04-16; filing date: 2026-04-20.
• Grant: 5,618 RSUs recorded at $0.00 per unit.
• Vesting: First anniversary of grant (2027-04-16), subject to continued service.
• Plan: Granted under the Company’s 2019 Stock-Based Incentive Compensation Plan (footnote F1).
• Shares owned after transaction: not specified in the provided filing excerpt.
• Timeliness: Filing was made 4 days after the transaction date; Form 4s are generally due within two business days—investors may review the EDGAR filing for any timeliness notation.

Context
RSU grants are a common form of executive/director compensation intended for retention; they are not an open-market purchase or sale and do not by themselves signal a buy/sell decision. Upon vesting, each RSU converts into one share (subject to plan terms and any tax withholding).