MEH SUB LLC

SEC source: 0001048462-19-000065 · form4.xml · nonDerivative · entry 1

WEXFORD CAPITAL LP · CIK 0001048462 · Director · 10% owner

Wexford Catalyst Trading LTD · CIK 0001415181 · Director · 10% owner

Wexford Spectrum Trading LTD · CIK 0001415180 · Director · 10% owner

MEH SUB LLC · CIK 0001710079 · Director · 10% owner

Wexford GP LLC · CIK 0001472112 · Director · 10% owner

DAVIDSON CHARLES E · CIK 0001001391 · Director · 10% owner

JACOBS JOSEPH · CIK 0001048485 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 22,045,273

F1 · shares: Represents the common stock of the Issuer acquired by Wexford Catalyst Trading Limited ("WCT").

F2 · price: Represents a weighted average price. These shares of common stock were purchased in multiple transactions at prices ranging from $1.3058 to $1.3494, inclusive. The Reporting Persons, as defined below, undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.

F3 · balance_after: Represents the common stock of the Issuer held in the aggregate by Wexford Spectrum Trading Limited ("WST"), WCT, MEH SUB LLC ("MEH", and together with WST and WCT, the "Wexford Entities") and Wexford Capital LP ("Wexford Capital").

F4 · ownership.direct: Wexford Capital may, by reason of its status as (i) sub-advisor of each of WST and WCT and (ii) manager of MEH, be deemed to own beneficially the securities of which the Wexford Entities possess beneficial ownership. Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities of which the Wexford Entities possess beneficial ownership. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs", and together with the Wexford Entities, Wexford Capital, Wexford GP and Davidson, the "Reporting Persons") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities of which the Wexford Entities possess beneficial ownership.

F5 · ownership.direct: Each of Wexford Capital, Wexford GP, Davidson and Jacobs share the power to vote and to dispose of the securities beneficially owned by the Wexford Entities. Each of Wexford Capital, Wexford GP, Davidson and Jacobs disclaim beneficial ownership of the securities owned by the Wexford Entities and this report shall not be deemed as an admission that they are the beneficial owners of such securities, except to the extent of any pecuniary interests therein. The Reporting Persons may be deemed to be directors by deputization by virtue of Marc McCarthy and Arthur Amron, each an employee of Wexford Capital, serving as directors of the Issuer.

F1 · ownership.nature: Represents the common stock of the Issuer acquired by Wexford Catalyst Trading Limited ("WCT").

SEC source: 0001048462-19-000063 · form4.xml · nonDerivative · entry 1

WEXFORD CAPITAL LP · CIK 0001048462 · Director · 10% owner

Wexford Spectrum Trading LTD · CIK 0001415180 · Director · 10% owner

Wexford Catalyst Trading LTD · CIK 0001415181 · Director · 10% owner

MEH SUB LLC · CIK 0001710079 · Director · 10% owner

Wexford GP LLC · CIK 0001472112 · Director · 10% owner

DAVIDSON CHARLES E · CIK 0001001391 · Director · 10% owner

JACOBS JOSEPH · CIK 0001048485 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 22,028,581

F1 · shares: Represents the common stock of the Issuer acquired in the aggregate by Wexford Spectrum Trading Limited ("WST") and Wexford Catalyst Trading Limited ("WCT").

F2 · price: Represents a weighted average price. These shares of common stock were purchased in multiple transactions at prices ranging from $1.3600 to $1.3629, inclusive. The Reporting Persons, as defined below, undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.

F3 · balance_after: Represents the common stock of the Issuer held in the aggregate by WST, WCT, MEH SUB LLC ("MEH", and together with WST and WCT, the "Wexford Entities") and Wexford Capital LP ("Wexford Capital").

F4 · ownership.direct: Wexford Capital may, by reason of its status as (i) sub-advisor of each of WST and WCT and (ii) manager of MEH, be deemed to own beneficially the securities of which the Wexford Entities possess beneficial ownership. Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities of which the Wexford Entities possess beneficial ownership. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs", and together with the Wexford Entities, Wexford Capital, Wexford GP and Davidson, the "Reporting Persons") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities of which the Wexford Entities possess beneficial ownership.

F5 · ownership.direct: Each of Wexford Capital, Wexford GP, Davidson and Jacobs share the power to vote and to dispose of the securities beneficially owned by the Wexford Entities. Each of Wexford Capital, Wexford GP, Davidson and Jacobs disclaim beneficial ownership of the securities owned by the Wexford Entities and this report shall not be deemed as an admission that they are the beneficial owners of such securities, except to the extent of any pecuniary interests therein. The Reporting Persons may be deemed to be directors by deputization by virtue of Marc McCarthy and Arthur Amron, each an employee of Wexford Capital, serving as directors of the Issuer.

F1 · ownership.nature: Represents the common stock of the Issuer acquired in the aggregate by Wexford Spectrum Trading Limited ("WST") and Wexford Catalyst Trading Limited ("WCT").

SEC source: 0001048462-18-000035 · form4.xml · nonDerivative · entry 2

MEH SUB LLC · CIK 0001710079 · Director · 10% owner

WEXFORD CAPITAL LP · CIK 0001048462 · Director · 10% owner

Wexford GP LLC · CIK 0001472112 · Director · 10% owner

DAVIDSON CHARLES E · CIK 0001001391 · Director · 10% owner

JACOBS JOSEPH · CIK 0001048485 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,978,893

F3 · shares: These shares of common stock of the Issuer were sold by MEH SUB LLC ("MEH") to the underwriters in a secondary public offering of the common stock at a price of $38.01 per share, in connection with the underwriters' partial exercise of their option to purchase additional shares of the Issuer's common stock from MEH and the other selling stockholder granted by such selling stockholders in the previously reported June 2018 secondary offering (the "Option Exercise"). The Option Exercise closed on July 30, 2018. Other material terms of the Offering are described in the Form 424B5, dated June 19, 2018, filed by the Issuer with the SEC on June 28, 2018.

F3 · price: These shares of common stock of the Issuer were sold by MEH SUB LLC ("MEH") to the underwriters in a secondary public offering of the common stock at a price of $38.01 per share, in connection with the underwriters' partial exercise of their option to purchase additional shares of the Issuer's common stock from MEH and the other selling stockholder granted by such selling stockholders in the previously reported June 2018 secondary offering (the "Option Exercise"). The Option Exercise closed on July 30, 2018. Other material terms of the Offering are described in the Form 424B5, dated June 19, 2018, filed by the Issuer with the SEC on June 28, 2018.

F4 · ownership.direct: Wexford Capital may, by reason of its status as manager of MEH, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Each of Wexford Capital, Wexford GP, Davidson and Jacobs share the power to vote and to dispose of the securities beneficially owned by MEH. Each of Wexford Capital, Wexford GP, Davidson and Jacobs disclaim beneficial ownership of the securities owned by MEH and this report shall not be deemed as an admission that they are the beneficial owners of such securities, except to the extent of any pecuniary interests therein.

SEC source: 0001048462-18-000030 · form4.xml · nonDerivative · entry 2

MEH SUB LLC · CIK 0001710079 · Director · 10% owner

WEXFORD CAPITAL LP · CIK 0001048462 · Director · 10% owner

Wexford GP LLC · CIK 0001472112 · Director · 10% owner

DAVIDSON CHARLES E · CIK 0001001391 · Director · 10% owner

JACOBS JOSEPH · CIK 0001048485 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,244,919

F3 · shares: These shares of common stock of the Issuer were sold by MEH SUB LLC ("MEH") to the underwriters in a secondary public offering of the common stock (the "Offering") at a price of $38.01 per share, which Offering closed on June 29, 2018. Other material terms of the Offering are described in the Form 424B5, dated June 19, 2018, filed by the Issuer with the SEC on June 28, 2018.

F3 · price: These shares of common stock of the Issuer were sold by MEH SUB LLC ("MEH") to the underwriters in a secondary public offering of the common stock (the "Offering") at a price of $38.01 per share, which Offering closed on June 29, 2018. Other material terms of the Offering are described in the Form 424B5, dated June 19, 2018, filed by the Issuer with the SEC on June 28, 2018.

F4 · ownership.direct: Wexford Capital may, by reason of its status as manager of MEH, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Each of Wexford Capital, Wexford GP, Davidson and Jacobs share the power to vote and to dispose of the securities beneficially owned by MEH. Each of Wexford Capital, Wexford GP, Davidson and Jacobs disclaim beneficial ownership of the securities owned by MEH and this report shall not be deemed as an admission that they are the beneficial owners of such securities, except to the extent of any pecuniary interests therein.

SEC source: 0001140361-17-025875 · doc1.xml · nonDerivative · entry 2

MEH SUB LLC · CIK 0001710079 · Director · 10% owner

WEXFORD CAPITAL LP · CIK 0001048462 · Director · 10% owner

Wexford GP LLC · CIK 0001472112 · 10% owner

DAVIDSON CHARLES E · CIK 0001001391 · Director · 10% owner

JACOBS JOSEPH · CIK 0001048485 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,009,319

F2 · shares: The shares of common stock reported herein were issued to MEH Sub LLC ("MEH SUB") in exchange for MEH SUB's contribution of its membership interest in each of (1) Sturgeon Acquisitions LLC, a Delaware limited liability company; (2) Stingray Energy Services LLC, a Delaware limited liability company; and (3) Stingray Cementing LLC, a Delaware limited liability company. The issuance of the shares of common stock reported herein was approved by the board of directors of the Issuer in advance.

F2 · price: The shares of common stock reported herein were issued to MEH Sub LLC ("MEH SUB") in exchange for MEH SUB's contribution of its membership interest in each of (1) Sturgeon Acquisitions LLC, a Delaware limited liability company; (2) Stingray Energy Services LLC, a Delaware limited liability company; and (3) Stingray Cementing LLC, a Delaware limited liability company. The issuance of the shares of common stock reported herein was approved by the board of directors of the Issuer in advance.

F3 · ownership.direct: The shares of common stock reported herein are held by MEH SUB. The shares of common stock previously reported as being held by Mammoth Energy Holding LLC were transferred to MEH SUB in an internal reorganization. This form is jointly filed by MEH SUB, Wexford, Wexford GP LLC ("Wexford GP"), Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs"). Wexford serves as manager to MEH SUB and as such may be deemed to share beneficial ownership of the common stock held by MEH, but disclaims such beneficial ownership to the extent such beneficial ownership exceeds its pecuniary interest. (*continued under Footnote (4) below).

F4 · ownership.direct: (*continued from Footnote (3) above) Wexford GP, as the general partner of Wexford, may be deemed to share beneficial ownership of the common stock held by MEH SUB, but disclaims such beneficial ownership to the extent such beneficial ownership exceeds its pecuniary interest. Messrs. Davidson and Jacobs, as the controlling persons of Wexford GP, may be deemed to share beneficial ownership of any common stock held by MEH SUB for which Wexford serves as manager, but disclaim such beneficial ownership to the extent such beneficial ownership exceeds their respective pecuniary interest therein.