Cactus, Inc.

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. )

Cactus, Inc.

920 Memorial City Way, Suite 300

Houston, Texas 77024

(713) 626-8800

NOTICE OF 2025 ANNUAL MEETING OF STOCKHOLDERS

To the stockholders of Cactus, Inc.:

Notice is hereby given that the 2025 Annual Meeting of Stockholders (the “Annual Meeting”) of Cactus, Inc. (the “Company”) will be held on May 13, 2025 at 9:00 a.m. Central Time. The Annual Meeting will be a completely virtual meeting conducted exclusively via a live webcast at www.virtualshareholdermeeting.com/WHD2025. The Annual Meeting is being held for the following purposes:

1. To elect to the Company’s Board of Directors (the “Board”) the three Class II directors set forth in the accompanying Proxy Statement, each of whom will hold office until the 2026 Annual Meeting of Stockholders and until his or her successor is elected and qualified or until his or her earlier death, resignation or removal;

2. To ratify the appointment of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025;

3. To approve the amendment of the Company’s Long-Term Incentive Plan, as amended and restated effective May 16, 2023, to increase the number of shares of the Company’s Class A common stock reserved for issuance under such plan from 5,500,000 to 8,500,000;

4. To approve, on a non-binding, advisory basis, the compensation of our named executive officers as reported in the accompanying Proxy Statement;

5. To approve, on a non-binding, advisory basis, the frequency of holding advisory votes on the compensation of our named executive officers at an interval of “every one year,” “every two years” or “every three years”; and

6. To transact such other business as may properly come before the Annual Meeting or any adjournments or postponements thereof.

You will be able to attend the Annual Meeting virtually, submit questions and vote during the live webcast by visiting www.virtualshareholdermeeting.com/WHD2025 and entering the 16-digit control number included in your Notice of Internet Availability of Proxy Materials or on your proxy card or voting instruction form.

Holders of record of the Company’s Class A common stock (NYSE: WHD) and Class B common stock (together, the “Common Stock”) at the close of business on March 19, 2025, the record date for the Annual Meeting, are entitled to receive notice of and to vote at the Annual Meeting or any adjournment or postponement of the Annual Meeting. These holders will vote together as a single class on each proposal.

YOUR VOTE IS IMPORTANT. Voting promptly, regardless of the number of shares of Common Stock you own, will aid us in reducing the expense of any further proxy solicitation in connection with the Annual

Meeting. We describe the proposals in more detail in the accompanying proxy statement. We encourage you to read the proxy statement in its entirety before voting.

If your shares are held in “street name,” that is, your shares are held in the name of a bank, broker or other nominee, you will receive instructions from the bank, broker or other nominee, as your record holder, that must be followed for your record holder to vote your shares of Common Stock per your instructions. Internet voting will also be offered to stockholders holding shares of Common Stock in street name.

We urge you to review the enclosed proxy materials carefully and to submit your proxy or voting instructions as soon as possible so that your Common Stock will be represented at the Annual Meeting.

By Order of the Board of Directors,

William Marsh Executive Vice President, General Counsel and Corporate Secretary

Houston, Texas

April 1, 2025

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 13, 2025: THE NOTICE OF 2025 ANNUAL MEETING OF STOCKHOLDERS, THE PROXY STATEMENT AND ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2024 ARE AVAILABLE AT www.proxyvote.com.

The Notice of Internet Availability of Proxy Materials is first being mailed on or about April 1, 2025, and the proxy materials relating to the annual meeting will first be made available on or about the same date.