O'Sullivan Stephanie L. 4

What Happened
Stephanie L. O'Sullivan, a director of Huntington Ingalls Industries (HII), was credited with 12.893 shares (director stock units) on March 13, 2026. The transaction is reported as an award/acquisition (code A) at $0.00 per share (dividend-equivalent credits), so the reported cash value for this grant is $0.

Key Details

• Transaction date: 2026-03-13; Report filed: 2026-03-16. Filing appears timely under standard Form 4 rules.
• Transaction type: Grant/Award of dividend-equivalent director stock units (code A).
• Shares acquired: 12.893 SUAs; reported price: $0.00; reported value: $0.
• Shares owned after transaction: Not specified in this filing.
• Footnote: Per the company's LTISPs, dividend equivalents are credited on each director stock unit (SUA) after the quarterly cash dividend; each SUA represents a right to one share payable generally within 30 days after a non-employee director leaves the board. Dividend-equivalent shares are calculated by dividing the aggregate dividend on the SUAs by the closing stock price on the dividend payment date (see footnote F1).

Context
This was a non-cash, routine credit of dividend equivalents to director stock units—not an open-market purchase or sale—so it reflects compensation mechanics rather than a direct trading signal. Dividend-equivalent SUAs typically convert to stock only upon certain conditions (e.g., leaving the board), and therefore do not represent immediate market purchases or sales.