Exhibit 99
Form 4 Joint Filer Information
Name: EnCap V-B Acquisitions, L.P.
Address: 1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: EnCap V-B Acquisitions, L.P.
By: EnCap V-B Acquisitions GP, LLC,
its general partner
By: EnCap Energy Capital Fund V-B,
L.P., its sole member
By: EnCap Equity Fund V GP, L.P.,
its general partner
By: EnCap Investments L.P.,
its general partner
By: EnCap Investments GP, L.L.C.,
its general partner
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
Name: EnCap Energy Capital Fund VI, L.P.
Address: 1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: EnCap Energy Capital Fund VI, L.P.
By: EnCap Equity Fund VI GP, L.P.,
its general partner
By: EnCap Investments L.P.,
its general partner
By: EnCap Investments GP, L.L.C.,
its general partner
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
Name: EnCap VI-B Acquisitions, L.P.
Address: 1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: EnCap VI-B Acquisitions, L.P.
By: EnCap VI-B Acquisitions GP, LLC,
its general partner
By: EnCap Energy Capital Fund VI-B,
L.P., its sole member
By: EnCap Equity Fund VI GP, L.P.,
its general partner
By: EnCap Investments L.P.,
its general partner
By: EnCap Investments GP, L.L.C.,
its general partner
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
Name: EnCap Energy Capital Fund VII, L.P.
Address: 1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: EnCap Energy Capital Fund VII, L.P.
By: EnCap Equity Fund VII GP, L.P.,
its general partner
By: EnCap Investments L.P.,
its general partner
By: EnCap Investments GP, L.L.C.,
its general partner
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
Name: Bold Energy Holdings, LLC
Address: C/O ENCAP INVESTMENTS L.P.
1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: Bold Energy Holdings, LLC
By: EnCap Energy Capital Fund IX,
L.P., its sole member
By: EnCap Equity Fund IX GP, L.P.,
its general partner
By: EnCap Investments L.P.,
its general partner
By: EnCap Investments GP, L.L.C.,
its general partner
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
Name: EnCap Energy Capital Fund IX, L.P.
Address: 1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: EnCap Energy Capital Fund
IX, L.P.
By: EnCap Equity Fund IX GP, L.P.,
its general partner
By: EnCap Investments L.P.,
its general partner
By: EnCap Investments GP, L.L.C.,
its general partner
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
Name: EnCap Partners GP, LLC
Address: 1100 LOUISIANA STREET, SUITE 4900
HOUSTON, TX 77002
Issuer & Ticket Symbol: Earthstone Energy, Inc. [ESTE]
Date of Event Requiring Statement: 01/07/2021
Relationship of Reporting Person to
Issuer: 10% Owner
Signature: EnCap Partners GP, LLC
By: /s/ Douglas E. Swanson, Jr.,
----------------------------
Managing Director
-----------------
Date: 01/11/2021
