Reed Kimberly A. 4

What Happened Kimberly A. Reed, a member of Momentus Inc.'s Board of Directors, acquired 913 shares through the exercise/conversion of a derivative security and was granted 6,039 restricted stock units (RSUs) on May 18, 2026. Both transactions show an acquisition price of $0, so the reported dollar value is $0. The RSUs are a contingent right to common shares (see footnote).

Key Details

• Transaction date: 2026-05-18; filing date (Form 4): 2026-05-20 (timely filing).
• Transactions reported: Exercise/conversion of derivative (M) — 913 shares at $0; Grant/award (A) — 6,039 RSUs at $0.
• Total shares involved: 6,952 (913 acquired immediately via derivative; 6,039 contingent via RSUs).
• Shares owned after transaction: not specified in the provided filing details.
• Footnotes: F1 — each RSU converts to one share of Class A common stock. F2 — the RSUs vest in full on the earlier of May 18, 2027 or the 2027 Annual Meeting, subject to Reed’s continued board service through vesting.
• No sales or immediate dispositions reported; not a cash sale or 10b5‑1 plan disclosure.

Context This filing reflects a board-related equity award and a derivative conversion rather than an open-market purchase or sale. RSU grants are common for director compensation; the RSUs are contingent and subject to a one-year (or meeting-tied) vesting condition. Because the reported price is $0, the filing shows acquisition of rights to shares rather than a paid purchase.