UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)*

DAWSON GEOPHYSICAL COMPANY

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

239360100

(CUSIP Number)

Matt D. Wilks

Wilks Brothers, LLC

17010 IH 20

Cisco, Texas 76437

Telephone: (817)-850-3600

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

January 10, 2022

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.   ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

This Amendment No. 2 (this “Amendment”) amends and supplements the Schedule 13D filed with the Securities and Exchange Commission (the “SEC”) on January 19, 2021, as amended by Amendment No. 1 thereto filed with the SEC on October 25, 2021 (the “Schedule 13D”) by the Reporting Persons relating to shares of common stock, par value $0.01 per share (“Common Stock”), of Dawson Geophysical Company (the “Issuer”).

Information reported in the Schedule 13D remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment. Capitalized terms used but not defined in this Amendment have the respective meanings set forth in the Schedule 13D.

Item 4. Purpose of Transaction

Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following:

Amendment to Agreement and Plan of Merger

On January 10, 2022, the Issuer and Wilks Brothers, LLC (“Wilks”) entered into Amendment No. 3 (the “Amendment”) to the Agreement and Plan of Merger (as amended, the “Merger Agreement”) by and among the Issuer, Wilks and WB Acquisitions Inc. (“Merger Sub”). The Amendment (i) lowers the minimum number of shares of Common Stock that are required to be tendered in the Offer (as defined in the Merger Agreement) to close the Offer, together with the shares then owned by Wilks, Merger Sub and any other affiliate or direct or indirect wholly-owned subsidiary of Wilks, from 80% to 66.67% of the shares then outstanding, (ii) provides for Stephen Jumper, Craig Cooper and Michael Klofas to resign from the Issuer’s Board of Directors (the “Board”), in each case, effective as of and conditioned upon the Acceptance Time (as defined in the Merger Agreement) occurring, with Mark Vander Ploeg and Ted North continuing as directors, and for the appointment of Matt Wilks, Sergei Krylov and Bruce Bradley to the Board, with Mr. Wilks serving as Chairman, in each case, effective as of and conditioned upon the Acceptance Time occurring and (iii) further extends the Offer to expire at 5:00 p.m. New York City time on January 14, 2022.

The foregoing description of the Amendment is qualified in its entirety by reference to the full text of the Amendment, which is filed as Exhibit 1 to this Amendment and is incorporated by reference herein.

Item 5. Interest in Securities of the Issuer.

Item 5 of the Schedule 13D is hereby amended by amending and replacing in their entirety each of Item 5(a) and 5(b) as follows:

(a)–(b) Each Reporting Person’s beneficial ownership of the Common Stock as of the date of this Amendment is reflected on that Reporting Person’s cover page. The Reporting Persons may be deemed to be the beneficial owners of an aggregate of 2,094,586 shares of the Common Stock, representing 8.86% of the 23,643,934 shares of Common Stock outstanding as of November 2, 2021, as reported in the Issuer’s Form 10-Q filed with the SEC on November 4, 2021.

Wilks beneficially owns 2,094,237 shares of Common Stock, representing 8.86% of the Issuer’s issued and outstanding Common Stock. Wilks is a manager-managed limited liability company, managed by Dan Wilks and Farris Wilks. Dan Wilks and Farris Wilks are brothers and may be deemed to indirectly beneficially own the shares of Common Stock directly beneficially owned by Wilks.

Dan Wilks, together with his spouse, Staci Wilks, who share the same household, may be deemed to exercise voting and investment power over an additional 349 shares of Common Stock and therefore may be deemed to beneficially own such shares.

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer.

Item 6 of the Schedule 13D is hereby amended and supplemented by adding the following:

The information set forth in Item 4 of this Amendment is incorporated by reference into this Item 6.

Item 7. Material to Be Filed as Exhibits.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: January 14, 2021