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

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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.

(b) Address of Principal Business Office or, if none, Residence

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.

(c) Citizenship

See Item 4 on the cover pages hereto.

(d) Title of Class of Securities

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

(e) CUSIP Number

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

Item 3. If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is:
(a) A Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o);
(b) A Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c);
(c) An insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c);
(d) An investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e) An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
(f) An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

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