13G Filing: HBK Investments and Vantage Energy Acquisition Corp (VEACU)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

VANTAGE
ENERGY ACQUISITION CORP.

(Name of Issuer)

Units, each consisting of one share of Class A Common Stock and one-third of one
Warrant¹

(Title of Class of Securities)

92211L204²

(CUSIP Number)

April 17,
2017

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐ Rule 13d-1(b)

☒
Rule 13d-1(c)

☐ Rule 13d-1(d)

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, as amended (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).

Name, Address
and Telephone Number of Person Authorized to Receive Notices and Communications:

Jon L. Mosle

HBK Investments L.P.

2101 Cedar
Springs Road, Suite 700

Dallas, Texas 75201

(214) 758-6107

Vantage Energy Acquisition Corp.

5221 N. OConnor Boulevard,
11^th Floor, Irving, Texas 75039

This Schedule 13G is jointly filed by and on behalf of each of
HBK Investments L.P., a Delaware limited partnership (HBK Investments), HBK Capital Ltd., a Cayman Islands exempted company (HBK Capital), HBK Services LLC, a Delaware limited liability company
(HBK Services), HBK Partners II L.P., a Delaware limited partnership (HBK Partners), HBK Management LLC, a Delaware limited liability company (HBK Management) and HBK
Master Fund L.P., a Cayman Islands exempted limited partnership (HBK Master, and together with HBK Investments, HBK Capital, HBK Services, HBK Partners and HBK Management, the Reporting Persons).
The Reporting Persons are filing this Schedule 13G jointly and the agreement among the Reporting Persons to file jointly is attached hereto as Exhibit 99.1 and incorporated herein by reference.

HBK Master is the record and beneficial owner of the securities covered by this Schedule 13G (the Securities). HBK
Master has the power to vote or to direct the vote of the shares of Class A Common Stock owned by it (the HBK Class A Shares). HBK Master has the power to dispose or direct the
disposition of the Units owned by it (the HBK Units) and the HBK Class A Shares.

As investment manager of
HBK Master, HBK Investments may be deemed to have the shared power to vote or to direct the vote of the HBK Class A Shares and may be deemed to have the shared power to dispose or direct the disposition of the HBK Units and the HBK Class A
Shares. HBK Investments does not own any shares of Class A Common Stock or Units directly and disclaims beneficial ownership of the HBK Units and the HBK Class A Shares.

As general partner of HBK Master, HBK Capital may be deemed to have the shared power to vote or to direct the vote of the HBK Class A
Shares and may be deemed to have the shared power to dispose or direct the disposition of the HBK Units and the HBK Class A Shares. HBK Capital does not own any shares of Class A Common Stock or Units directly and disclaims beneficial
ownership of the HBK Units and the HBK Class A Shares.

HBK Investments has delegated discretion to vote and dispose of the
Securities to HBK Services and, accordingly, HBK Services may be deemed to have the shared power to vote or to direct the vote of the HBK Class A Shares and may be deemed to have the shared power to dispose or direct the disposition of the HBK
Units and the HBK Class A Shares. HBK Services does not own any shares of Class A Common Stock or Units directly and disclaims beneficial ownership of the HBK Units and the HBK Class A Shares.

HBK Services may, from time to time, delegate investment discretion to vote and dispose of certain of the Securities to HBK New York LLC, a
Delaware limited liability company, HBK Virginia LLC, a Delaware limited liability company or HBK Europe Management LLP, a limited liability partnership organized under the laws of the United Kingdom (collectively, the
Subadvisors). Each of HBK Services and the Subadvisors is under common control with HBK Investments. The Subadvisors do not own any Class A Common Stock or Units directly and disclaim beneficial ownership of the HBK
Units and the HBK Class A Shares.

As general partner of HBK Investments, HBK Partners may be deemed to have the shared power to vote
or to direct the vote of the HBK Class A Shares and may be deemed to have the shared power to dispose or direct the disposition of the HBK Units and the HBK Class A Shares. HBK Partners does not own any shares of Class A Common Stock
or Units directly and disclaims beneficial ownership of the HBK Units and the HBK Class A Shares.

As general partner of HBK Partners and the managing member of HBK Services, HBK Management may be
deemed to have the shared power to vote or to direct the vote of the HBK Class A Shares and may be deemed to have the shared power to dispose or direct the disposition of the HBK Units and the HBK Class A Shares. HBK Management does not
own any shares of Class A Common Stock or Units directly and disclaims beneficial ownership of the HBK Units and the HBK Class A Shares.

Each Reporting Person declares that neither the filing of this Schedule 13G nor anything herein shall be construed as an admission that such
person is, for the purposes of Section 13(d) or 13(g) of the Act, the beneficial owner of any Securities other than those reported herein as being owned by it. The Subadvisors declare that neither the filing of this Schedule 13G nor anything herein
shall be construed as an admission that they are, for the purposes of Section 13(d) or 13(g) of the Act, beneficial owners of any Securities.

The address of the
principal business office of each of HBK Investments, HBK Capital, HBK Services, HBK Partners and HBK Management is 2101 Cedar Springs Road, Suite 700, Dallas, Texas 75201. The address of the principal business office of HBK Master is c/o HBK
Services LLC, 2101 Cedar Springs Road, Suite 700, Dallas, Texas 75201.

See Item 4 on the cover pages hereto.

Units, each consisting of one share of Class A
Common Stock and one-third of one Warrant

Class A Common Stock, par value $0.0001 per share

92211L204 is the CUSIP Number of the Units. The Class A Common Stock
does not have a CUSIP number.

If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution:

If this statement is being filed to
report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following  ☒.

Jamiel A. Akhtar,
Richard L. Booth and David C. Haley are the managing members of HBK Management (collectively, the Members). The Members expressly declare that that neither the filing of this Schedule 13G nor anything herein shall be
construed as an admission that they are, for the purposes of Section 13(d) or 13(g) of the Act, beneficial owners of any Securities.

Not Applicable.

See Item 2.

Not Applicable.

By signing below I certify that, to the best of my 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, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true,
complete and correct.

EXHIBIT INDEX