Sentinel Energy Services Inc. Contracts & Agreements

Conversion Agreement, dated as of March 31, 2020, by and between the Company and the Sponsor (Filed With SEC on May 12, 2020)

Description of Capital Stock (Filed With SEC on March 16, 2020)

Amendment No. 1 to Warrant Agreement, dated as of December 9, 2019, by and between the Company and CST (Filed With SEC on December 12, 2019)

Convertible Promissory Note, dated as of March 1, 2019, issued to Sentinel Management Holdings, LLC (Filed With SEC on March 6, 2019)

Termination Agreement, dated as of February 12, 2019, by and between the Company and Strike Capital, LLC (Filed With SEC on February 13, 2019)

Letter Agreement, dated January 31, 2018, between the Company and Jon A. Marshall (Filed With SEC on February 5, 2018)

Indemnification Agreement , dated January 31, 2018, between the Company and Jon A. Marshall (Filed With SEC on February 5, 2018)

Warrant Agreement, dated November 2, 2017, between the Company and Continental Stock Transfer & Trust Company, as warrant agent (Filed With SEC on November 7, 2017)

Letter Agreement, dated November 2, 2017, among the Company, its officers and directors and the Sponsor (Filed With SEC on November 7, 2017)

Investment Management Trust Agreement, dated November 2, 2017, between the Company and Continental Stock Transfer & Trust Company, as trustee (Filed With SEC on November 7, 2017)

Registration Rights Agreement, dated November 2, 2017, among the Company, the Sponsor and certain other security holders named therein (Filed With SEC on November 7, 2017)

Administrative Services Agreement, dated November 2, 2017, between the Company and the Sponsor (Filed With SEC on November 7, 2017)

Private Placement Warrants Purchase Agreement, dated November 2, 2017, between the Company and the Sponsor (Filed With SEC on November 7, 2017)

Option Agreement, dated November 2, 2017, among the Company, CSL Energy Opportunities Fund III, L.P. and CSL Energy Holdings III, Corp, LLC (Filed With SEC on November 7, 2017)

Form of Underwriting Agreement (Filed With SEC on October 26, 2017)

Specimen Unit Certificate (Filed With SEC on September 22, 2017)

Specimen Warrant Certificate (Filed With SEC on September 22, 2017)

Form of Warrant Agreement between Continental Stock Transfer & Trust Company and the Registrant (Filed With SEC on September 22, 2017)

Promissory Note, dated June 12, 2017, issued to Sentinel Management Holdings, LLC (Filed With SEC on September 22, 2017)

Form of Letter Agreement among the Registrant and its officers and directors and Sentinel Management Holdings, LLC (Filed With SEC on September 22, 2017)

Form of Investment Management Trust Agreement between Continental Stock Transfer & Trust Company and the Registrant (Filed With SEC on September 22, 2017)

Form of Registration Rights Agreement among the Registrant, Sentinel Management Holdings, LLC and the other parties thereto (Filed With SEC on September 22, 2017)

Amended and Restated Securities Purchase Agreement, dated June 30, 2017, between the Registrant and Sentinel Management Holdings, LLC (Filed With SEC on September 22, 2017)

Form of Private Placement Warrants Purchase Agreement between the Registrant and Sentinel Management Holdings, LLC (Filed With SEC on September 22, 2017)

Form of Indemnification Agreement (Filed With SEC on September 22, 2017)

Form of Administrative Services Agreement between the Registrant and Sentinel Management Holdings, LLC (Filed With SEC on September 22, 2017)

Form of Option Agreement between the Registrant and the investors listed as the purchasers on the signature page thereof (Filed With SEC on September 22, 2017)