NET Power Inc. — Proxy Solicitation & Information Statement 2025

Apr 24, 2025

DEFA14A 1 ef20047906_defa14a.htm DEFA14A Licensed to: Broadridge Document created using Broadridge PROfile 25.3.2.5298 Copyright 1995 - 2025 Broadridge

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

NET POWER INC.
(NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
(NAME OF PERSON(S) FILING PROXY STATEMENT, IF OTHER THAN THE REGISTRANT)

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Counts! NET POWER INC 2025 Annual Meeting Vote by June 02, 2025 11 :59 PM ET You invested in NET POWER INC and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on June 03, 2025. Get informed before you vote View the Notice & Proxy Statement, Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 20, 2025. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Smartphone users Point your camera here and vote without entering a I number Vote in Person at the Meeting June 03, 2025 11 :00 AM EST 320 Roney Street Suite 200 Durham, NC 27701 If you choose to vote these shares in person at the meeting, you must request a "legal proxy." To do so, please follow the instructions at www.ProxyVote.com or request a paper copy of the materials, which will contain the appropriate instructions. Please check the meeting materials for any special requirements for meeting attendance.

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Voting Items 1. Election of Class II Directors Nominees: 01) Jeff Bennett 02) Kyle Derham NET POWER INC 2025 Annual Meeting Vote by June 02, 2025 11:59PMET 03) Alejandra Veltmann Board Recommends 0 For 2. To ratify the appointment of KPMG LLP as our independent auditors for the fiscal year ending December 31, 2025. 0 For NOTE: Such other business as may properly come before the meeting or any adjournment thereof.