NET Power Inc. Insider Filing and Power of Attorney

This filing contains two key documents. The first is an SEC Form 3 (Initial Statement of Beneficial Ownership of Securities) filed by Ned Leland Shuman, Chief Financial Officer of NET Power Inc. The filing, dated May 27, 2026, reports a grant of 529,801 restricted stock units (RSUs) received on April 13, 2026, which vest on April 13, 2029, subject to continued employment. The second document is a Power of Attorney, signed by Ned Leland Shuman on May 14, 2026, appointing Andrew Davisson as his attorney-in-fact. This grants Davisson the authority to handle SEC filings, including Forms 3, 4, and 5, related to Shuman's holdings and transactions in NET Power Inc. securities, as well as manage his EDGAR account. The Power of Attorney revokes any previous similar documents and remains in effect until Shuman is no longer required to file such reports or until earlier revoked.