UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 3)*

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 18, 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).

EXPLANATORY NOTE

This Amendment No. 3 (this “Amendment”) amends and supplements the Schedule 13D originally filed by Dan Wilks, Staci Wilks, Wilks Brothers, LLC (“Wilks”) and Farris Wilks with the Securities and Exchange Commission (the “SEC”) on January 19, 2021, as amended by Amendment No. 1 thereto filed on October 25, 2021 and Amendment No. 2 thereto filed on January 14, 2022 (collectively, the “Schedule 13D”), 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Information reported in the Schedule 13D remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment.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 2. Identity and Background.

Item 2 of the Schedule 13D is hereby amended by amending and replacing in its entirety Item 2(a) as follows:

(a) Name of Persons Filing: This Schedule 13D is being filed jointly by Dan Wilks, Staci Wilks, Wilks, Farris Wilks, and WB Acquisitions Inc. (“Merger Sub”) (collectively, the “Reporting Persons”).

Item 2 of the Schedule 13D is hereby further amended by amending and supplementing each of Items 2(b), 2(c), 2(d), 2(e) and 2(f) by adding the following:

(b) The business address for Merger Sub is 17018 IH 20, Cisco, TX 76437.

(c) The principal business of Merger Sub is investing in securities in connection with the Offer (as defined below). Merger Sub is a corporation organized under the laws of the State of Delaware.

(d) No Reporting Person has, during the last five (5) years, been convicted in any criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) No Reporting Person has, during the last five (5) years, been a party to any civil proceeding of a judicial or administrative body of competent jurisdiction which resulted in or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) Merger Sub is organized under the laws of the State of Delaware.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 of the Schedule 13D is hereby amended and supplemented by adding the following:

The source of funding for the transactions consummated in connection with the Offer (as defined below) reported herein was working capital of Wilks.

The information set forth in Item 4 of this Amendment is incorporated by reference into this Item 3.

Item 4. Purpose of Transaction.

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

On October 25, 2021, Wilks entered into an Agreement and Plan of Merger (as amended, the “Merger Agreement”) with the Issuer and Merger Sub, a subsidiary of Wilks. Pursuant to the Merger Agreement, and upon the terms and subject to the conditions described therein, Merger Sub commenced a tender offer (the “Offer”) to purchase any and all of the shares of Common Stock that were issued and outstanding at a price of $2.34 per share (the “Offer Price”) in cash, without interest, less any applicable withholding taxes, upon the terms and subject to the conditions set forth in the Offer to Purchase, dated November 1, 2021, and in the related Letter of Transmittal, filed as Exhibit (a)(1)(A) and Exhibit (a)(1)(B), respectively, to the Tender Offer Statement on Schedule TO originally filed with the SEC by Wilks and Merger Sub on November 1, 2021, each including all amendments thereto.

The Offer expired at the end of the day on January 14, 2022 (the “Expiration Date”). American Stock Transfer & Trust Company LLC, in its capacity as depositary and paying agent for the Offer (the “Depositary”), has advised Wilks and Merger Sub that a total of 15,547,010 shares of Common Stock were validly tendered and not validly withdrawn pursuant to the Offer.

The number of shares of Common Stock validly tendered and not properly withdrawn pursuant to the Offer, when combined with the shares of Common Stock owned by Wilks and its affiliates, satisfied the 66.67% Minimum Condition (as defined in the Merger Agreement). All conditions to the Offer having been satisfied or waived, Merger Sub irrevocably accepted for payment and paid for all shares of Common Stock validly tendered and not validly withdrawn prior to the Expiration Date.

The Reporting Persons intend to review their investment in the Issuer on a continuing basis in anticipation of the closing of the transactions contemplated by the Merger Agreement, and may purchase additional shares of Common Stock prior to the Closing Date (as defined in the Merger Agreement) at prices not in excess of the Offer Price.

Pursuant to that certain Amendment No. 3 to the Merger Agreement, dated January 10, 2022 (the “Third Amendment”), effective as of the Acceptance Time, Steven Jumper, Craig Cooper and Michael Klofas each resigned as directors of the Issuer and members of any committee of the Issuer’s board of directors. Also pursuant to the Third Amendment, as a condition to Wilks’ obligation to complete the Offer and effective following the resignations of Messrs. Jumper, Cooper and Klofas, Matt Wilks, Sergei Krylov and Bruce Bradley were appointed to the Issuer’s board of directors, with Mr. Wilks appointed to serve as Chairman and Mr. Bradley to serve as a member of the Audit Committee.

The foregoing descriptions of the Merger Agreement and the Third Amendment are qualified in their entirety by reference to the full text of the Merger Agreement and the Third Amendment, which are filed as Exhibit 1 and Exhibit 2 to this Amendment, respectively, and are 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 Items 5(a), 5(b) and 5(c) 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 17,641,596 shares of the Common Stock, representing 74.61% of the 23,643,934 shares of Common Stock issued and 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 17,641,247 shares of Common Stock, representing 74.61% of the issued and outstanding Common Stock, consisting of (i) 2,094,237 shares of Common Stock directly owned by Wilks and (ii) 15,547,010 shares of Common Stock directly owned by Merger Sub, which is a subsidiary of Wilks. 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 each of Wilks and Merger Sub.

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.

(c) On January 18, 2022, in connection with the expiration of the Offer and pursuant to the Merger Agreement, Merger Sub irrevocably accepted for payment 15,547,010 shares of Common Stock validly tendered and not validly withdrawn prior to the Expiration Date at a price of $2.34 per share, for aggregate consideration of approximately $36,380,003.40.

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:

On January 28, 2022, the Reporting Persons entered into the Joint Filing Agreement attached as Exhibit 3 hereto with respect to the joint filing of this Amendment to the Schedule 13D and any amendment or amendments hereto.

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 28, 2022

Exhibit 3

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, each of the undersigned acknowledges and agrees that the foregoing statement on this Schedule 13D is filed on behalf of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of the undersigned without the necessity of filing additional joint acquisition statements. Each of the undersigned acknowledges that it shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

Dated: January 28, 2022

Exhibit 4

POWER OF ATTORNEY

WB Acquisitions Inc. (“Merger Sub”), incorporated and existing under the laws of Delaware, having its address at 17018 IH 20, Cisco, TX 76437, represented by Matthew Wilks, Director, hereby authorizes Matthew Wilks to represent Merger Sub to execute on Merger Sub’s behalf all SEC forms (including any amendments thereto) that Merger Sub may be required to file with the United States Securities and Exchange Commission and any other actions in connection with the above, as a result of Merger Sub’s position with, or ownership of, or transactions in securities by or on behalf of Merger Sub with Dawson Geophysical Company. The authority of such individual under this Statement shall continue for as long as Merger Sub is required to file such forms, unless earlier terminated by my delivery of a written revocation of this authorization to Merger Sub.

I hereby acknowledge that such individual is not assuming any of Wilks’s responsibilities to comply with any of the requirements of the Securities Exchange Act of 1934, as amended.

Dated: January 28, 2022