Reid Taylor L

Row 1 · 2022-07-01 · Exercise / conversion · Acquired 46,856 · Balance 73,502

F1: As a result of the merger (the "Merger") between Oasis Petroleum Inc. ("Oasis") and Whiting Petroleum Corporation ("Whiting") contemplated by that certain Agreement and Plan of Merger, dated as of March 7, 2022, by and among Oasis, Ohm Merger Sub Inc., a Delaware corporation and a wholly owned subsidiary of Oasis, New Ohm LLC, a Delaware limited liability company and a wholly owned subsidiary of Oasis, and Whiting (the "Merger Agreement"), the performance period associated with the Performance Share Units granted to the Reporting Person under Oasis 2020 Long Term Incentive Plan (the "Plan") that were originally subject to a total shareholder return performance goal over a three-year measurement period ended and the Reporting Person earned 70,284 Performance Share Units (which represent 300% of the target number of Performance Share Units (23,428) originally reported by the Reporting Person on a prior Form 4),

F2: (Continued from Footnote 1) or an additional 46,856 Performance Share Units, which earned Performance Share Units were settled in shares of the Issuer's common stock, par value $0.01 per share ("Common Stock"), upon the Reporting Person ceasing to serve as President and Chief Operating Officer of the Issuer in connection with the Merger. Following the closing of the Merger, the Issuer changed its name to "Chord Energy Corporation."

F3: As a result of the Merger, the performance period associated with the Performance Share Units granted to the Reporting Person under the Plan that were originally subject to a total shareholder return performance goal over a four-year measurement period ended and the Reporting Person earned 70,284 Performance Share Units (which represent 300% of the target number of Performance Share Units (23,428) originally reported by the Reporting Person on a prior Form 4), or an additional 46,856 Performance Share Units, which earned Performance Share Units were accelerated and settled in shares of Common Stock upon the Reporting Person ceasing to serve as President and Chief Operating Officer of the Issuer in connection with the Merger.

F4: Includes 22,203 shares of Common Stock subject to a previously granted restricted stock unit award, which were accelerated and settled in shares of Common Stock upon the Reporting Person ceasing to serve as President and Chief Operating Officer of the Issuer in connection with the Merger.

Row 2 · 2022-07-01 · Grant · Acquired 133,956 · Balance 207,458

F5: As a result of the Merger, the performance period associated with the Performance Share Units granted to the Reporting Person under the Plan that were originally subject to a relative total shareholder return performance goal based on the Issuer's performance as compared to a predefined peer group or the Russell 2000 constituent companies, as applicable, over a three- or four-year measurement period, as applicable, ended and the Reporting Person earned a total of 40,244 Performance Share Units, which earned Performance Share Units were settled in shares of Common Stock upon the Reporting Person ceasing to serve as President and Chief Operating Officer of the Issuer in connection with the Merger. The amount reported in this row includes the 40,244 Performance Share Units described in this Note 5, as well as the additional 46,856 Performance Share Units described in Note 1 and the additional 46,856 Performance Share Units described in Note 3.

Row 3 · 2022-07-01 · Exercise / conversion · Disposed 23,428 · Balance 23,428

F1: As a result of the merger (the "Merger") between Oasis Petroleum Inc. ("Oasis") and Whiting Petroleum Corporation ("Whiting") contemplated by that certain Agreement and Plan of Merger, dated as of March 7, 2022, by and among Oasis, Ohm Merger Sub Inc., a Delaware corporation and a wholly owned subsidiary of Oasis, New Ohm LLC, a Delaware limited liability company and a wholly owned subsidiary of Oasis, and Whiting (the "Merger Agreement"), the performance period associated with the Performance Share Units granted to the Reporting Person under Oasis 2020 Long Term Incentive Plan (the "Plan") that were originally subject to a total shareholder return performance goal over a three-year measurement period ended and the Reporting Person earned 70,284 Performance Share Units (which represent 300% of the target number of Performance Share Units (23,428) originally reported by the Reporting Person on a prior Form 4),

F2: (Continued from Footnote 1) or an additional 46,856 Performance Share Units, which earned Performance Share Units were settled in shares of the Issuer's common stock, par value $0.01 per share ("Common Stock"), upon the Reporting Person ceasing to serve as President and Chief Operating Officer of the Issuer in connection with the Merger. Following the closing of the Merger, the Issuer changed its name to "Chord Energy Corporation."

Row 4 · 2022-07-01 · Exercise / conversion · Disposed 23,428 · Balance 0

F3: As a result of the Merger, the performance period associated with the Performance Share Units granted to the Reporting Person under the Plan that were originally subject to a total shareholder return performance goal over a four-year measurement period ended and the Reporting Person earned 70,284 Performance Share Units (which represent 300% of the target number of Performance Share Units (23,428) originally reported by the Reporting Person on a prior Form 4), or an additional 46,856 Performance Share Units, which earned Performance Share Units were accelerated and settled in shares of Common Stock upon the Reporting Person ceasing to serve as President and Chief Operating Officer of the Issuer in connection with the Merger.

Row 1 · 2022-02-01 · Disposition to issuer · Disposed 40,712 · Balance 0

F1: On February 1, 2022, pursuant to that certain Agreement and Plan of Merger, dated as of October 25, 2021 (the "Merger Agreement"), by and among Oasis Midstream Partners LP ("OMP"), OMP GP LLC, Crestwood Equity Partners LP ("Crestwood"), Project Phantom Merger Sub LLC, Project Falcon Merger Sub LLC and Crestwood Equity GP LLC, (i) each common unit representing limited partner interests in OMP (other than the Sponsor Units (as defined in the Merger Agreement)) issued and outstanding immediately prior to the Effective Time (as defined in the Merger Agreement) was converted into the right to receive 0.8700 common units representing limited partner interests in Crestwood ("Crestwood Common Units"). On January 31, 2022 (the last trading day prior to the Effective Time), the closing price of the Crestwood Common Units was $27.48.

Row 2 · Balance 6,056

F2: An award of Phantom Units that was granted to the Reporting Person by our sponsor, Oasis Petroleum Inc. While the Phantom Units were granted by Oasis Petroleum Inc., each Phantom Unit represents the right to receive, upon vesting, a cash payment equal to the fair market value of one common unit representing a limited partner interest of OMP. Oasis Petroleum Inc. is solely responsible for any payments attributable to the Phantom Units. Since the Phantom Units were granted by Oasis Petroleum Inc., such Phantom Units will remain outstanding following the Effective Time.

F3: The award of Phantom Units was originally granted to the Reporting Person on January 17, 2019 and was scheduled to vest in three equal installments. One-third of the award vested in each of 2020 and 2021. The final one-third of the award, consisting of the number of Phantom Units indicated, is eligible to vest in 2022. Modifications, if any, to be made to the award of Phantom Units following the Effective Time to give effect to the transactions contemplated by the Merger Agreement will be determined by Oasis Petroleum Inc. in its sole discretion.