SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_______________
SCHEDULE 13G/A
_______________
Under the Securities Exchange Act of 1934
(Amendment No.  1)*
Altus Midstream Company
(Name of Issuer)
Class A Common Stock, par value $0.0001 per share
(Title of Class of Securities)
02215L100
(CUSIP Number)
December 31, 2019
(Date of event which requires filing of this statement)
Check the appropriate box to designate the rule pursuant to which this Schedule 13G is filed:
¨	Rule 13d-1(b)
x	Rule 13d-1(c)
¨	Rule 13d-1(d)
(Page 1 of 7 Pages)

______________________________

*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. 02215L100 13G/A Page 2 of 7 Pages

1	NAMES OF REPORTING PERSONS Highbridge Capital Management, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) ¨ (b) ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION State of Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 0
	6	SHARED VOTING POWER 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants
	7	SOLE DISPOSITIVE POWER 0
	8	SHARED DISPOSITIVE POWER 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES			¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.42%
12	TYPE OF REPORTING PERSON IA, OO

CUSIP No. 02215L100 13G/A Page 3 of 7 Pages

1	NAMES OF REPORTING PERSONS Highbridge MSF International Ltd. (formerly known as 1992 MSF International Ltd.)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) ¨ (b) ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands, British West Indies
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 0
	6	SHARED VOTING POWER 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants
	7	SOLE DISPOSITIVE POWER 0
	8	SHARED DISPOSITIVE POWER 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES			¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.42%
12	TYPE OF REPORTING PERSON OO

CUSIP No. 02215L100 13G/A Page 4 of 7 Pages

Item 1(a).	NAME OF ISSUER:
	The name of the issuer is Altus Midstream Company (the "Company").

Item 1(b).	ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
	The Company's principal executive offices are located at One Post Oak Central, 2000 Post Oak Boulevard, Suite 100, Houston, Texas 77056-4400.

Item 2(a).	NAME OF PERSON FILING:
Item 2(b).	ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
Item 2(c).	CITIZENSHIP:

This statement is filed by:
(i)	Highbridge Capital Management, LLC 277 Park Avenue, 23rd Floor New York, New York 10172 Citizenship: State of Delaware
(ii)	1992 MSF International Ltd. (formerly known as 1992 MSF International Ltd.) c/o Highbridge Capital Management, LLC 277 Park Avenue, 23rd Floor New York, New York 10172 Citizenship: Cayman Islands
The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons."

Item 2(d).	TITLE OF CLASS OF SECURITIES:
	Class A Common Stock, par value $0.0001 per share (the "Class A Common Stock").

Item 2(e).	CUSIP NUMBER:
	02215L100

Item 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b) OR 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 of 1940,
(e)	¨	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);

CUSIP No. 02215L100 13G/A Page 5 of 7 Pages

(f)	¨	Employee Benefit Plan or Endowment Fund in accordance with Rule 13d-1(b)(1)(ii)(F),
(g)	¨	Parent Holding Company or control person in accordance with Rule 13d-1(b)(1)(ii)(G),
(h)	¨	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;
(j)	¨	A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);
(k)	¨	Group, in accordance with Rule 13d-1(b)(1)(ii)(K).

If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please

specify the type of institution: _________________________________________

Item 4.	OWNERSHIP.
	(a)	Amount beneficially owned:
	As of December 31, 2019, (i) Highbridge MSF International Ltd. may be deemed to beneficially own 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants and (ii) Highbridge Capital Management, LLC, as the trading manager of Highbridge MSF International Ltd., may be deemed to be the beneficial owner of the 6,885,166 shares of Class A Common Stock issuable upon exercise of warrants held by Highbridge MSF International Ltd.
	(b)	Percent of class:
	The percentages used herein and in the rest of this Schedule 13G/A are calculated based upon 74,929,305 shares of Class A Common Stock reported to be outstanding as of October 31, 2019, as reported in the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2019 filed by the Company with the Securities and Exchange Commission on October 31, 2019, and assumes the exercise of the warrants reported herein.  Therefore, as of December 31, 2019, (i) Highbridge MSF International Ltd. may be deemed to beneficially own approximately 8.42% of the outstanding shares of Class A Common Stock and (ii) Highbridge Capital Management, LLC may be deemed to beneficially own approximately 8.42% of the outstanding shares of Class A Common Stock.
	The foregoing should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of the shares of Class A Common Stock issuable upon exercise of the warrants held by Highbridge MSF International Ltd.
	(c)	Number of shares as to which such person has:
		(i)	Sole power to vote or to direct the vote
			0

CUSIP No. 02215L100 13G/A Page 6 of 7 Pages

(ii)	Shared power to vote or to direct the vote
	See Item 4(a)
(iii)	Sole power to dispose or to direct the disposition of
	0
(iv)	Shared power to dispose or to direct
	the disposition of
	See Item 4(a)

Item 5.	OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
	Not applicable.

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 OF MEMBERS OF THE GROUP.
	Not applicable.

Item 9.	NOTICE OF DISSOLUTION OF GROUP.
	Not applicable.

Item 10. CERTIFICATION.

Each Reporting Person hereby makes the following certification:

By signing below the Reporting Person certifies that, to the best of its knowledge and belief, the securities referred to above 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 the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

CUSIP No. 02215L100 13G/A Page 7 of 7 Pages

SIGNATURES

After reasonable inquiry and to the best of our knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct.

DATED: February 13, 2020

HIGHBRIDGE CAPITAL MANAGEMENT, LLC
By:	/s/ John Oliva
Name:	John Oliva
Title:	Managing Director
HIGHBRIDGE MSF INTERNATIONAL LTD.
By:	Highbridge Capital Management, LLC
	its Trading Manager
By:	/s/ John Oliva
Name:	John Oliva
Title:	Managing Director