Under the Securities Exchange Act of 1934
(Amendment No. 20)*

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

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

(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. o

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 remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

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).

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(3)                                 The percentage ownership is based on 15,427,561 shares of Common Stock outstanding, as reported by the Issuer in its quarterly report on Form 10-Q filed on November 2, 2017.

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(1)                               Carl H. Westcott and Court H. Westcott exercise shared voting and disposition power over the 239,072 shares of Common Stock as the managers of Carl Westcott, LLC, the general partner of Commodore Partners.

(2)                               The percentage ownership is based on 15,427,561 shares of Common Stock outstanding, as reported by the Issuer in its quarterly report on Form 10-Q filed on November 2, 2017.

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(1)                                 Carl H. Westcott and Court H. Westcott exercise shared voting and disposition power over the 25,000 shares of Common Stock as the managers of Carl Westcott, LLC, the general partner of GK Westcott.

(2)                                 The percentage ownership is based on 15,427,561 shares of Common Stock outstanding, as reported by the Issuer in its quarterly report on Form 10-Q filed on November 2, 2017.

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(1)                                 Carl H. Westcott and Court H. Westcott exercise shared voting and disposition power over the 264,072 shares of Common Stock as the managers of Carl Westcott, LLC, the general partner of each of Commodore Partners, which directly owns 239,072 shares of Common Stock, and GK Westcott, which directly owns 25,000 shares of Common Stock.

(2)                               The percentage ownership is based on 15,427,561 shares of Common Stock outstanding, as reported by the Issuer in its quarterly report on Form 10-Q filed on November 2, 2017.

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(1)                                 Consists of 500 shares of Common Stock held of record by Court H. Westcott, Trustee of the Court H. Westcott Living Trust.  Carl H. Westcott has shared discretionary authority to purchase and dispose of those shares of Common Stock for the benefit of such reporting person, but does not exercise any voting power with respect to such shares.  Carl H. Westcott expressly disclaims beneficial ownership of any such shares of Common Stock.

(2)                                 Carl H. Westcott and Court H. Westcott exercise shared voting and disposition power over 264,072 shares of Common Stock as the managers of Carl Westcott, LLC, the general partner of each of Commodore Partners, which directly owns 239,072 shares of Common Stock, and GK Westcott, which directly owns 25,000 shares of Common Stock.

(3)                                 The percentage ownership is based on 15,427,561 shares of Common Stock outstanding, as reported by the Issuer in its quarterly report on Form 10-Q filed on November 2, 2017.

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(1)                                 Carla Westcott directly holds 5,000 shares of Common Stock.  Carl H. Westcott has shared discretionary authority to purchase and dispose of those shares of Common Stock for the benefit of such reporting person, but does not exercise any voting power with respect to such shares.  Carl H. Westcott expressly disclaims beneficial ownership of any such shares of Common Stock.

(2)                                 The percentage ownership is based on 15,427,561 shares of Common Stock outstanding, as reported by the Issuer in its quarterly report on Form 10-Q filed on November 2, 2017.

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Item 1. Security and Issuer

This Amendment No. 20 to Schedule 13D (“Amendment No. 20”) amends and supplements the original Schedule 13D filed on June 11, 2015 (as amended by Amendment No. 1, Amendment No. 2, Amendment No. 3, Amendment No. 4, Amendment No. 5, and Amendment No. 6, Amendment No. 7, Amendment No. 8, Amendment No. 9, Amendment No. 10, Amendment No. 11, Amendment No. 12, Amendment No. 13, Amendment No. 14, Amendment No. 15, Amendment No. 16, Amendment No. 17, Amendment No. 18 and Amendment No. 19 the “Schedule 13D”), Amendment No. 1 to Schedule 13D filed on June 30, 2015 (“Amendment No. 1”), Amendment No. 2 to Schedule 13D filed on July 6, 2015 (“Amendment No. 2”), Amendment No. 3 to Schedule 13D filed on July 20, 2015 (“Amendment No. 3”), Amendment No. 4 to Schedule 13D filed on August 10, 2015 (“Amendment No. 4”), Amendment No. 5 to Schedule 13D filed on May 25, 2016 (“Amendment No. 5”), Amendment No. 6 to Schedule 13D filed on September 6, 2016 (“Amendment No. 6”), Amendment No. 7 to Schedule 13D filed on September 21, 2016 (“Amendment No. 7”), Amendment No. 8 to Schedule 13D filed on December 5, 2016 (“Amendment No. 8”), Amendment No. 9 to Schedule 13D filed on December 16, 2016 (“Amendment No. 9”), Amendment No. 10 to Schedule 13D filed on January 3, 2017 (“Amendment No. 10”), Amendment No. 11 to Schedule 13D filed on January 17, 2017 (“Amendment No. 11”), Amendment No. 12 to Schedule 13D filed on January 27, 2017 (“Amendment No. 12”), Amendment No. 13 to Schedule 13D (“Amendment No. 13”) filed on February 7, 2017, Amendment No. 14 to Schedule 13D (“Amendment No. 14”) filed on February 17, 2017, Amendment No. 15 to Schedule 13D (“Amendment No. 15”) filed on March 16, 2017, Amendment No. 16 to Schedule 13D (“Amendment No. 16”) filed April 13, 2017, Amendment No. 17 to Schedule 13D (“Amendment No. 17”) filed May 2, 2017, Amendment No. 18 to Schedule 13D (“Amendment No. 18”) filed November 13, 2017 and Amendment No. 19 to Schedule 13D (“Amendment No. 19”) filed December 21, 2017. This Amendment No. 20 is filed jointly on behalf of Carl H. Westcott, Commodore Partners, Ltd., G.K. Westcott LP, Carl Westcott, LLC, Court H. Westcott, and Carla Westcott (the “Reporting Persons”) relating to their beneficial ownership of the common stock, par value $0.50 per share (the “Common Stock”) of Comstock Resources, Inc., a Nevada corporation (the “Issuer”), whose principal executive offices are located at 5300 Town and Country Blvd., Suite 500, Frisco,  Texas  75034. On August 1, 2016, the Issuer effected a 1-for-5 reverse stock split.

This Amendment No. 20 is filed pursuant to Rules 13d-1 and 13d-5 under the Securities Exchange Act of 1934, as amended, to reflect that as of December 26, 2017, Carl H. Westcott and the other Reporting Persons ceased to hold beneficial ownership of more than five percent (5%) of the outstanding Common Stock of the Issuer. Unless otherwise indicated, all capitalized terms used herein but not defined shall have the same meanings as set forth in the Schedule 13D.

Item 2. Identity and Background

Item 3. Source and Amount of Funds or Other Consideration

The information set forth or incorporated in Items 4 and 6 hereof are incorporated herein by reference.

With respect to each Reporting Person that is a natural person, the shares of Common Stock were acquired with the personal funds of such Reporting Person. The shares of Common Stock held by Commodore Partners, of which Carl Westcott, LLC is the sole general partner, were acquired with funds held by Commodore Partners for the general purpose of investing. The shares of Common Stock held by GK Westcott, of which Carl Westcott, LLC is the sole general partner, were acquired with funds held by GK Westcott for the general purpose of investing.

Item 4. Purpose of Transaction

This Item is being amended and supplemented to add the following:

The information set forth or incorporated in Items 3 and 6 hereof are incorporated herein by reference.

After accounting for all purchases and sales of Common Stock of the Reporting Persons since the filing of Amendment No. 19 (the period of December 21, 2017 through December 26, 2017), a net 53,577 shares of Common Stock were sold by Carl H. Westcott during such period on his own behalf and on behalf of certain other Reporting Persons for an aggregate price of approximately $426,453.

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Item 5. Interest in Securities of the Issuer.

This Item is being amended and supplemented to add the following:

(b)  The responses in rows 7, 8, 9 and 10 of the cover pages of this Statement are hereby incorporated by reference. Each of Court H. Westcott and Carla Westcott directly holds 500 and 5,000 shares of Common Stock, respectively, over which Carl H. Westcott shares dispositive power, but not voting power, pursuant to trading authorizations.  Additionally, Carl H. Westcott shares dispositive power, but not voting power, pursuant to trading authorizations, of 14,050, 1,572, and 2,050 shares of Common Stock held by Peter Underwood, Francisco Trejo, Jr., and Rosie Greene, respectively. Commodore Partners holds 239,072 shares of Common Stock, over which Carl H. Westcott holds shared voting and dispositive power with Court H. Westcott as the managers of Carl Westcott, LLC, the sole general partner of Commodore Partners. GK Westcott holds 25,000 shares of Common Stock, over which Carl H. Westcott holds shared voting and dispositive power with Court H. Westcott as the managers of Carl Westcott, LLC, the sole general partner of GK Westcott.

(c)  After accounting for all purchases and sales of Common Stock of the Reporting Persons during the period of December 21, 2017 through December 26, 2017, a net 53,577 shares of Common Stock were sold by Carl H. Westcott on his own behalf and on behalf of the other Reporting Persons for an aggregate price of approximately $426,453.  All purchases and sales made in such period were made on the dates and at the prices set forth below. All purchases and sales listed below were affected in ordinary open market transactions.

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(e)  As of December 26, 2017, Carl H. Westcott and the other Reporting Persons ceased to hold beneficial ownership of more than five percent (5%) of the Common Stock of the Issuer.

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

Item 7. Material to Be Filed as Exhibits

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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.

Date: December 28, 2017

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