(a) On June 2, 2020, the Audit Committee (the “Audit Committee”) of the Board of Directors (the “Board”) of Riviera Resources, Inc. (“Riviera” or the “Company”), a Delaware corporation, dismissed KPMG, LLP (“KPMG”) as its independent registered public accounting firm. KPMG served as the Company’s independent registered public accounting firm from December 31, 2017 through June 2, 2020.

KPMG’s audit reports on Riviera’s consolidated financial statements as of and for the years ended December 31, 2019 and 2018, did not contain any adverse opinion or disclaimer of opinion, nor were such reports qualified or modified as to uncertainty, audit scope or accounting principles, except as follows:

KPMG’s reports on the consolidated financial statements of Riviera Resources, Inc. as of and for the years ended December 31, 2019 and 2018, contained separate paragraphs that stated:

“As discussed in Note 3 to the consolidated and combined financial statements, the Company changed its method of accounting for revenue recognition in 2018 due to the adoption of Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers”.

“As discussed in Note 1 to the consolidated and combined financial statements, the Company completed its spin-off from Linn Energy, Inc., the former parent company of Riviera Resources, Inc. on August 7, 2018. Prior to the spin-off, the accompanying consolidated and combined financial statements were prepared on a carve-out combined basis and derived from the former parent’s consolidated financial statements and accounting records for the periods presented”.

“As discussed in Note 1 to the consolidated and combined financial statements, Linn Energy, Inc. (formerly known as Linn Energy, LLC), the former parent company of Riviera Resources, Inc. emerged from bankruptcy on February 28, 2017. Accordingly, the consolidated and combined financial statements have been prepared in conformity with ASC 852-10, Reorganizations, for the Successor as a new entity with assets, liabilities and a capital structure having carrying amounts not comparable with the amounts presented in the Predecessor period”.

The audit reports of KPMG LLP on the effectiveness of internal control over financial reporting as of December 31, 2019 and 2018 did not contain any adverse opinion or disclaimer of opinion, nor were they qualified or modified as to uncertainty, audit scope, or accounting principles.

During the two fiscal years ended December 31, 2019 and 2018 and the subsequent interim period from January 1, 2020 through June 2, 2020, there were no disagreements within the meaning of Item 304(a)(1)(iv) of Regulation S-K with KPMG on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedure, which if not resolved to the satisfaction of KPMG, would have caused it to make a reference to the subject matter of the disagreement(s) in connection with its reports covering such periods. In addition, no “reportable events,” as defined in Item 304(a)(1)(v) of Regulation S-K, occurred within the period of KPMG’s engagement and the subsequent interim period from January 1, 2020 through June 2, 2020.

Pursuant to Item 304(a)(3) of Regulation S-K, Riviera provided KPMG with a copy of the disclosures made pursuant to this Item 4.01 prior to the filing of this Report and requested that KPMG furnish a letter addressed to the Commission, which is attached hereto as Exhibit 16.1.

(b) On June 5, 2020, the accounting firm of BDO USA, LLP (“BDO”) was engaged by the Audit Committee as the Company’s new independent registered public accounting firm to perform independent audit services for the Company for the fiscal year ending December 31, 2020, effective immediately.

During the years ended December 31, 2019 and 2018, and the subsequent interim period preceding the engagement of BDO, Riviera did not consult BDO regarding either: (i) the application of accounting principles to a specified transaction, either completed or proposed; or the type of audit opinion that might be rendered on Riviera’s consolidated financial statements, and neither a written report was provided to Riviera nor oral advice was provided

that BDO concluded was an important factor considered by Riviera in reaching a decision as to the accounting, auditing or financial reporting issue; or (ii) any matter that was the subject of a disagreement or a “reportable event” (as described in paragraph 304(a)(1)(v) of Regulation S-K).