Filing Details

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities and Exchange Act of 1934 (Amendment No. 2)* Epsilon Energy Ltd. ------------------------------------------------------------------ (Name of Issuer) Common Stock ------------------------------------------------------------------ (Title of Class of Securities) 294375209 ------------------------------------------------------------------ (CUSIP Number) December 31, 2021 ------------------------------------------------------------------ (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1 (b) [X] Rule 13d-1 (c) [ ] Rule 13d-1 (d) * 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 the disclosures provided in a prior cover page. The information required in 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.) CUSIP NO. 294375209 13G 1 Name of Reporting Person Advisory Research Energy Fund, L.P. ------------------------------------------------------------------ 2 Check the Appropriate Box if a Member of a Group (a) [ ] (b) [ ] ------------------------------------------------------------------ 3 SEC Use Only ------------------------------------------------------------------ 4 Citizenship or Place of Organization Delaware ------------------------------------------------------------------ Number of 5 Sole Voting Power Shares 0 Shares ----------------------------------------------- Beneficially 6 Shared Voting Power Owned By 2,716,809 Shares ----------------------------------------------- Each 7 Sole Dispositive Power Reporting 0 Shares ----------------------------------------------- Person 8 Shared Dispositive Power With 2,716,809 Shares ------------------------------------------------------------------ 9 Aggregate Amount Beneficially Owned by Each Reporting Person 2,716,809 Shares ------------------------------------------------------------------ 10 Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ] ------------------------------------------------------------------ 11 Percent of Class Represented by Amount in Row (9) 11.6% ------------------------------------------------------------------ 12 Type of Reporting Person PN ------------------------------------------------------------------ Item 1 (a) Name of Issuer: Epsilon Energy Ltd. (b) Name of Issuer's Principal Executive Offices: 16945 Northchase Drive, Suite 1610 Houston, TX 77060 Item 2 (a) Person Filing: Advisory Research Energy Fund, L.P. (b) Address: 180 N. Stetson Ave., Suite 5500 Chicago, IL 60601 (c) Citizenship: Advisory Research Energy Fund, L.P. is an Delaware Limited Partnership (d) Title of Class of Securities: Common Stock (e) CUSIP Number: 294375209 Item 3 If this statement is filed pursuant to sections 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) [ ] Broker or Dealer registered under Section 15 of the Act (b) [ ] Bank as defined in Section 3(a)(6) of the Act (c) [ ] Insurance Company as defined in Section 3(a)(19) of the Act (d) [ ] Investment Company registered under Section 8 of the Investment Company Act (e) [ ] Investment Advisor in accordance with section 240.13d-1(b)(1)(ii)(E) (f) [ ] Employee Benefit Plan or Endowment Fund in accordance with section 240.13d-1(b) (1)(ii)(F) (g) [ ] Parent Holding Company or Control Person in accordance with section 13d-1(b) (1)(ii)(G) (h) [ ] A savings association as defined in section 3(b) of the Federal Deposit Insurance Act (i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 Item 4 Ownership (a) Amount Beneficially Owned: Advisory Research, Inc. 2,716,809 Shares (b) Percent of Class 11.6% (c) Number of shares as to which reporting person has: (i) Sole Voting Power 0 Shares (ii) Shared Voting Power 2,716,809 Shares (iii) Sole Dispositive Power 0 Shares (iv) Shared Dispositive Power 2,716,809 Shares Item 5 Ownership of Five Percent or Less of a Class: If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ] Item 6 Ownership of More than Five Percent on Behalf of Another Person: Not Applicable Item 7 Identification and Classification of the Subsidiary Which Acquired the Security being Reported on by the Parent Holding Company: Not Applicable Item 8 Identification and Classification if Members of the Group: Not Applicable Item 9 Notice of Dissolution of Group: Not Applicable Item 10 Certification By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of such securities and were not acquired and are not held in connection with or as a participant in any transaction having such purposes or effect.

SIGNATURE The undersigned certify, after reasonable inquiry and to the best knowledge and belief of the undersigned, that the information set forth in this Statement is true, complete and correct. The undersigned agree to the filing of this single Statement on Schedule 13G. Advisory Research, Inc. Date: February 7, 2022 By: /s/ Matthew K. Swaim Name: Matthew K. Swaim Title: Chief Executive Officer