X0306 4/A 2020-03-03 2020-03-04 0 0001692787 Altus Midstream Co ALTM 0001276258 CHRISTMANN JOHN J 2000 POST OAK BLVD, STE 100 HOUSTON TX 77056 0 0 0 1 CEO of Apache Corporation (1) Class A Common Stock 180660.155 I Held by Trustee Apache NQ Plan On March 4, 2020, the reporting person filed a Form 4 that inadvertently reported that, following his acquisition of 100,000 of the issuer's common stock on March 3, 2020, he indirectly owned 130,000 shares of the issuer's common stock. In fact, as reported in this amendment, the reporting person indirectly owns 180,660.155 shares of the issuer's common stock after such transaction. The reporting person also directly owns 25,000 shares of the issuer's common stock. (1) Apache Corporation controls the Issuer. Raj Sharma, Attorney-in-Fact 2020-03-06