{"url_path":"/sec/ectm/10-q/2026/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-13","source_url":"https://www.sec.gov/Archives/edgar/data/1487798/0001104659-26-060242-index.html","accession_number":"0001104659-26-060242","cik":"0001487798","ticker":"ECTM","issuer_name":"ECA Marcellus Trust I","edgar_url":"https://www.sec.gov/Archives/edgar/data/1487798/0001104659-26-060242-index.html","primary_entity_key":"0001487798","primary_entity_name":"ECA Marcellus Trust I"},"word_count":769,"has_tables":true,"body_markdown":"10-Q\n1\ntm2614274d1_10q.htm\nFORM 10-Q\n\n**UNITED STATES\nSECURITIES AND EXCHANGE COMMISSION**\n\n**Washington, D.C. 20549**\n\n**FORM 10-Q**\n\nx\n\n**QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**\n\n**For the quarterly period ended March 31, 2026**\n\n**or**\n\n¨\n\n**TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**\n\n**For the transition period from to **\n\n**Commission File Number: 001-34800**\n\n**ECA MARCELLUS TRUST I**\n\n(Exact name of registrant as specified in its charter)\n\n**Delaware**\n\n**27-6522024**\n\n(State or other jurisdiction of\n\nincorporation or organization)\n\n(I.R.S. Employer\n\nIdentification No.)\n\n**The Bank of New York Mellon**\n\n**Trust Company, N.A., Trustee**\n\n**Global Corporate Trust**\n\n**601 Travis Street, 16th Floor**\n\n**Houston, Texas**\n\n**77002**\n\n(Address\nof principal executive offices)\n\n(Zip Code)\n\n**(512) 236-6555**\n\n(Registrant’s telephone number, including area code)\n\nSecurities registered pursuant to Section 12(b) of the Act:\nNone\n\nIndicate\nby check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities\nExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports),\nand (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨\n\nIndicate\nby check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405\nof Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant\nwas required to submit such files). Yes o No\no\n\nIndicate by check mark whether the registrant\nis a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company.\nSee the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,”\nand “emerging growth company” in Rule 12b-2 of the Exchange Act.\n\nLarge accelerated filer\n¨\nAccelerated\nfiler ¨\nNon-accelerated\nfiler x\nSmaller\nreporting company x\nEmerging\ngrowth company ¨\n\nIf\nan emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying\nwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨\n\nIndicate\nby check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨\nNo x\n\nAs of May 13, 2026, 17,605,000 Common Units of Beneficial Interest\nin ECA Marcellus Trust I were outstanding.\n\n**TABLE OF CONTENTS**\n\nPART I – Financial Information\n\n[Item 1. Unaudited Financial Statements ](#a_002)\n[3](#a_002)\n\n[Statement of Assets, Liabilities and Trust Corpus as of March 31, 2026 (Unaudited) and December 31,\n2025 ](#a_003)\n[3](#a_003)\n\n[Statement of Distributable Income for the Three Months Ended March 31, 2026 and 2025 (Unaudited) ](#a_004)\n[4](#a_004)\n\n[Statement of Trust Corpus for the Three Months Ended March 31, 2026 and 2025 (Unaudited) ](#a_005)\n[5](#a_005)\n\n[Notes to Financial Statements ](#a_016)\n[6](#a_016)\n\n[Item 2. Trustee’s Discussion and Analysis of Financial Condition and Results of Operations ](#a_006)\n[10](#a_006)\n\n[Item 3. Quantitative and Qualitative Disclosures About Market Risk ](#a_007)\n[16](#a_007)\n\n[Item 4. Controls and Procedures ](#a_008)\n[16](#a_008)\n\n[PART – II Other Information](#a_009)\n[18](#a_009)\n\n[Item 1A. Risk Factors ](#a_010)\n[18](#a_010)\n\n[Item 5. Other Information ](#a_011)\n[18](#a_011)\n\n[Item 6. Exhibits ](#a_012)\n[18](#a_012)\n\n[SIGNATURES ](#a_013)\n[19](#a_013)\n\n[APPENDIX A ](#a_014)\n[20](#a_014)\n\n[Glossary of Certain Terms ](#a_015)\n[20](#a_015)\n\nReferences to the “Trust” in this document\nrefer to ECA Marcellus Trust I. As discussed in Part I, Item 2 – “Trustee’s Discussion and Analysis of Financial\nCondition and Results of Operations – Overview,” in November 2017 Greylock Energy, LLC, and certain of its wholly owned\nsubsidiaries acquired substantially all of the gas production and midstream assets of Energy Corporation of America, including all of\nthe interests of Legacy ECA (as defined below) in certain natural gas properties that are subject to the royalty interests held by ECA\nMarcellus Trust I (the “Acquisition”). References to “Greylock Energy” in this document refer to Greylock Energy,\nLLC and certain of its wholly-owned subsidiaries, including Greylock Production, LLC (“Greylock Production”), which serves\nas operator of the subject wells, and Greylock Midstream, LLC (“Greylock Midstream”), whose subsidiaries market and gather\ncertain of the gas. References to “Legacy ECA” in this document refer to Energy Corporation of America and its wholly-owned\nsubsidiaries, and, when discussing the conveyance documents, the Private Investors (as defined in “Glossary of Certain Terms”\nin Appendix A), as such entities existed prior to the asset acquisition by Greylock Energy. References to the “Sponsor” in\nthis document refer to Legacy ECA for periods prior to the Acquisition, and to Greylock Energy for periods after the Acquisition.\n\n2\n\n**PART I**-**FINANCIAL\nINFORMATION**"}