SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Petro Acquisitions Holdings, LP

(Last)

(First)

(Middle)

15021 KATY FREEWAY, SUITE 400

(Street)

HOUSTON

77094

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/09/2018

3. Issuer Name and Ticker or Trading Symbol
Alta Mesa Resources, Inc. /DE [ AMR ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Class C Common Stock	08/08/2018	⁽⁴⁾	Class A Common Stock	664,096⁽¹⁾	⁽⁴⁾	I	Through High Mesa Holdings, LP⁽³⁾⁽⁵⁾
Class C Common Stock	08/08/2018	⁽⁴⁾	Class A Common Stock	1,636,555⁽²⁾	⁽⁴⁾	I	Through High Mesa Inc.⁽³⁾

Explanation of Responses:

1. The reporting person's proportionate share of (a) 137,175,136 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of Alta Mesa Resources, Inc. (the "Company"), which are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and (b) 46,906,960 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company that are issuable if the Class A Common Stock trades above certain thresholds (the "Earn-Out Shares"), in each case beneficially owned by High Mesa Holdings, LP.

2. The reporting person's proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company, which are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa, Inc.

3. The common units in SRII Opco, LP, shares of Class C Common Stock and Earn-Out Shares referenced in this filing were all issued pursuant to a business combination that closed on February 9, 2018 whereby the Company acquired all of the outstanding equity of Alta Mesa Holdings, LP from High Mesa Holdings, LP and another person, and all of the outstanding equity of Kingfisher Midstream, LLC from KFM Holdco, LLC. The common units of SRII Opco, LP and the corresponding shares of Class C Common Stock of the Company issued in exchange for the equity of Alta Mesa Holdings, LP may not be converted into shares of Class A Common Stock until August 8, 2018.

4. Common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company, and have no expiration date.

5. The reporting person is party to a voting agreement with respect to more than 10% of the outstanding shares of the Company's Class A Common Stock and therefore, by rule, may be considered the beneficial owner of such shares.

Remarks:

Exhibit 24: Power of Attorney

	/s/ Kimberly O. Warnica-Attorney-in-Fact	06/12/2018
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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