LEIDEL PETER A

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · derivative · entry 14

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 4

Disclosed balance after: 107,992

Underlying: COMMON STOCK · 107,992 shares

Expires 2026-01-20

F1 · kind: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F9 · kind: On the Effective Date, the Reporting Person also received Tranche B Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00531001 of a Tranche B Warrant for each share of Old Common Stock. The Tranche B Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche B Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F9 · price: On the Effective Date, the Reporting Person also received Tranche B Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00531001 of a Tranche B Warrant for each share of Old Common Stock. The Tranche B Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche B Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F9 · derivative.exercise_date: On the Effective Date, the Reporting Person also received Tranche B Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00531001 of a Tranche B Warrant for each share of Old Common Stock. The Tranche B Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche B Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F4 · ownership.direct: These shares are directly owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP is the sole general partner of YT Extraction Co Investment Partners, LP. YT Extraction Associates LLC is the sole general partner of YT Extraction Company LP. As a result, YT Extraction Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP and YT Extraction Associates LLC disclaim beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP in excess of their pecuniary interest therein. Peter A. Leidel is a manager of YT Extraction Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · derivative · entry 13

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 4

Disclosed balance after: 215,984

Underlying: COMMON STOCK · 215,984 shares

Expires 2025-01-20

F1 · kind: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F8 · kind: On the Effective Date, the Reporting Person also received Tranche A Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.01062003 of a Tranche A Warrant for each share of Old Common Stock. The Tranche A Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche A Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F8 · price: On the Effective Date, the Reporting Person also received Tranche A Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.01062003 of a Tranche A Warrant for each share of Old Common Stock. The Tranche A Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche A Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F8 · derivative.exercise_date: On the Effective Date, the Reporting Person also received Tranche A Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.01062003 of a Tranche A Warrant for each share of Old Common Stock. The Tranche A Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche A Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F4 · ownership.direct: These shares are directly owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP is the sole general partner of YT Extraction Co Investment Partners, LP. YT Extraction Associates LLC is the sole general partner of YT Extraction Company LP. As a result, YT Extraction Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP and YT Extraction Associates LLC disclaim beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP in excess of their pecuniary interest therein. Peter A. Leidel is a manager of YT Extraction Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · derivative · entry 12

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6

Underlying: COMMON STOCK · 6 shares

Expires 2026-01-20

F1 · kind: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F9 · kind: On the Effective Date, the Reporting Person also received Tranche B Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00531001 of a Tranche B Warrant for each share of Old Common Stock. The Tranche B Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche B Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F9 · price: On the Effective Date, the Reporting Person also received Tranche B Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00531001 of a Tranche B Warrant for each share of Old Common Stock. The Tranche B Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche B Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F9 · derivative.exercise_date: On the Effective Date, the Reporting Person also received Tranche B Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00531001 of a Tranche B Warrant for each share of Old Common Stock. The Tranche B Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche B Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · derivative · entry 11

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11

Underlying: COMMON STOCK · 11 shares

Expires 2025-01-20

F1 · kind: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F8 · kind: On the Effective Date, the Reporting Person also received Tranche A Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.01062003 of a Tranche A Warrant for each share of Old Common Stock. The Tranche A Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche A Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F8 · price: On the Effective Date, the Reporting Person also received Tranche A Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.01062003 of a Tranche A Warrant for each share of Old Common Stock. The Tranche A Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche A Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F8 · derivative.exercise_date: On the Effective Date, the Reporting Person also received Tranche A Warrants to purchase shares of New Common Stock in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.01062003 of a Tranche A Warrant for each share of Old Common Stock. The Tranche A Warrants are exercisable for one share of New Common Stock from the date of issuance until 5:00 p.m., New York time, on the expiration date. The receipt of Tranche A Warrants was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 10

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 7

Disclosed balance after: 10,089

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F3 · price: On the Effective Date, new shares of the Issuer's common stock ("New Common Stock") were issued to the Reporting Person pursuant to the Plan in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00131007 of a share of New Common Stock for each share of Old Common Stock. The receipt of shares of New Common Stock was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F7 · ownership.direct: These shares are directly owned by Yorktown Energy Partners IX, L.P. Yorktown IX Company LP is the sole general partner of Yorktown Energy Partners IX, L.P. Yorktown IX Associates LLC is the sole general partner of Yorktown IX Company LP. As a result, Yorktown IX Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by Yorktown Energy Partners IX, L.P. Yorktown IX Company LP and Yorktown IX Associates LLC disclaim beneficial ownership of the common stock held by Yorktown Energy Partners IX, L.P. in excess of their pecuniary interest therein. Mr. Leidel is a manager of Yorktown IX Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by Yorktown Energy Partners IX, L.P.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 9

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 7

Disclosed balance after: 0

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F2 · price: On the Effective Date, all outstanding shares of the Issuer's common stock ("Old Common Stock") were cancelled and extinguished in accordance with the Plan approved by the Bankruptcy Court.

F7 · ownership.direct: These shares are directly owned by Yorktown Energy Partners IX, L.P. Yorktown IX Company LP is the sole general partner of Yorktown Energy Partners IX, L.P. Yorktown IX Associates LLC is the sole general partner of Yorktown IX Company LP. As a result, Yorktown IX Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by Yorktown Energy Partners IX, L.P. Yorktown IX Company LP and Yorktown IX Associates LLC disclaim beneficial ownership of the common stock held by Yorktown Energy Partners IX, L.P. in excess of their pecuniary interest therein. Mr. Leidel is a manager of Yorktown IX Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by Yorktown Energy Partners IX, L.P.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 8

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 6

Disclosed balance after: 5,646

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F3 · price: On the Effective Date, new shares of the Issuer's common stock ("New Common Stock") were issued to the Reporting Person pursuant to the Plan in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00131007 of a share of New Common Stock for each share of Old Common Stock. The receipt of shares of New Common Stock was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F6 · ownership.direct: These shares are directly owned by Yorktown Energy Partners XI, L.P. Yorktown XI Company LP is the sole general partner of Yorktown Energy Partners XI, L.P. Yorktown XI Associates LLC is the sole general partner of Yorktown XI Company LP. As a result, Yorktown XI Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by Yorktown Energy Partners XI, L.P. Yorktown XI Company LP and Yorktown XI Associates LLC disclaim beneficial ownership of the common stock held by Yorktown Energy Partners XI, L.P. in excess of their pecuniary interest therein. Mr. Leidel is a manager of Yorktown XI Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by Yorktown Energy Partners XI, L.P.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 7

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 6

Disclosed balance after: 0

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F2 · price: On the Effective Date, all outstanding shares of the Issuer's common stock ("Old Common Stock") were cancelled and extinguished in accordance with the Plan approved by the Bankruptcy Court.

F6 · ownership.direct: These shares are directly owned by Yorktown Energy Partners XI, L.P. Yorktown XI Company LP is the sole general partner of Yorktown Energy Partners XI, L.P. Yorktown XI Associates LLC is the sole general partner of Yorktown XI Company LP. As a result, Yorktown XI Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by Yorktown Energy Partners XI, L.P. Yorktown XI Company LP and Yorktown XI Associates LLC disclaim beneficial ownership of the common stock held by Yorktown Energy Partners XI, L.P. in excess of their pecuniary interest therein. Mr. Leidel is a manager of Yorktown XI Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by Yorktown Energy Partners XI, L.P.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 6

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 5

Disclosed balance after: 22,998

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F3 · price: On the Effective Date, new shares of the Issuer's common stock ("New Common Stock") were issued to the Reporting Person pursuant to the Plan in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00131007 of a share of New Common Stock for each share of Old Common Stock. The receipt of shares of New Common Stock was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F5 · ownership.direct: These shares are directly owned by Yorktown Energy Partners X, L.P. Yorktown X Company LP is the sole general partner of Yorktown Energy Partners X, L.P. Yorktown X Associates LLC is the sole general partner of Yorktown X Company LP. As a result, Yorktown X Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by Yorktown Energy Partners X, L.P. Yorktown X Company LP and Yorktown X Associates LLC disclaim beneficial ownership of the common stock held by Yorktown Energy Partners X, L.P. in excess of their pecuniary interest therein. Mr. Leidel is a manager of Yorktown X Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by Yorktown Energy Partners X, L.P.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 5

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 5

Disclosed balance after: 0

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F2 · price: On the Effective Date, all outstanding shares of the Issuer's common stock ("Old Common Stock") were cancelled and extinguished in accordance with the Plan approved by the Bankruptcy Court.

F5 · ownership.direct: These shares are directly owned by Yorktown Energy Partners X, L.P. Yorktown X Company LP is the sole general partner of Yorktown Energy Partners X, L.P. Yorktown X Associates LLC is the sole general partner of Yorktown X Company LP. As a result, Yorktown X Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by Yorktown Energy Partners X, L.P. Yorktown X Company LP and Yorktown X Associates LLC disclaim beneficial ownership of the common stock held by Yorktown Energy Partners X, L.P. in excess of their pecuniary interest therein. Mr. Leidel is a manager of Yorktown X Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by Yorktown Energy Partners X, L.P.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 4

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 4

Disclosed balance after: 26,648

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F3 · price: On the Effective Date, new shares of the Issuer's common stock ("New Common Stock") were issued to the Reporting Person pursuant to the Plan in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00131007 of a share of New Common Stock for each share of Old Common Stock. The receipt of shares of New Common Stock was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

F4 · ownership.direct: These shares are directly owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP is the sole general partner of YT Extraction Co Investment Partners, LP. YT Extraction Associates LLC is the sole general partner of YT Extraction Company LP. As a result, YT Extraction Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP and YT Extraction Associates LLC disclaim beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP in excess of their pecuniary interest therein. Peter A. Leidel is a manager of YT Extraction Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 3

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 4

Disclosed balance after: 0

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F2 · price: On the Effective Date, all outstanding shares of the Issuer's common stock ("Old Common Stock") were cancelled and extinguished in accordance with the Plan approved by the Bankruptcy Court.

F4 · ownership.direct: These shares are directly owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP is the sole general partner of YT Extraction Co Investment Partners, LP. YT Extraction Associates LLC is the sole general partner of YT Extraction Company LP. As a result, YT Extraction Associates LLC may be deemed to share the power to vote or direct the vote or to dispose or direct the disposition of the common stock owned by YT Extraction Co Investment Partners, LP. YT Extraction Company LP and YT Extraction Associates LLC disclaim beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP in excess of their pecuniary interest therein. Peter A. Leidel is a manager of YT Extraction Associates LLC. Mr. Leidel disclaims beneficial ownership of the common stock held by YT Extraction Co Investment Partners, LP.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 2

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F3 · price: On the Effective Date, new shares of the Issuer's common stock ("New Common Stock") were issued to the Reporting Person pursuant to the Plan in exchange for Old Common Stock held by the Reporting Person on the Effective Date at an effective exchange ratio of 0.00131007 of a share of New Common Stock for each share of Old Common Stock. The receipt of shares of New Common Stock was involuntary, without additional consideration and in accordance with the Plan approved by the Bankruptcy Court.

SEC source: 0001655020-21-000070 · wf-form4_161136116181984.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: On June 14, 2021, Extraction Oil & Gas, Inc., a Delaware corporation (the "Issuer"), and certain of its subsidiaries (together with the Issuer, the "Company") commenced voluntary cases under chapter 11 of the United States Bankruptcy Code in the United State Bankruptcy Court for the District of Delaware (the "Bankruptcy Court"). On December 23, 2020, the Bankruptcy Court entered an order confirming the Sixth Amended Joint Plan of Reorganization of Extraction Oil & Gas, Inc. and its Debtor Affiliates (as amended, modified or supplemented from time to time, the "Plan"). On January 20, 2021 (the "Effective Date"), the Plan became effective in accordance with its terms and the Company emerged from chapter 11.

F2 · price: On the Effective Date, all outstanding shares of the Issuer's common stock ("Old Common Stock") were cancelled and extinguished in accordance with the Plan approved by the Bankruptcy Court.

SEC source: 0001655020-20-000166 · wf-form4_160875677145674.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,000

SEC source: 0001655020-20-000163 · wf-form4_160755642058294.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,572

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.0474 to $0.048.

SEC source: 0000899243-19-014538 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,000

F1 · kind: Restricted stock grant.

SEC source: 0001655020-19-000080 · wf-form4_155926282677816.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 174,572

F1 · shares: Represents an award of 31,553 unvested restricted stock units, which vest on May 15, 2020, subject to continued service through the vesting date, and will be settled in shares of common stock.

SEC source: 0001209191-19-006530 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,895

F1 · shares: Common units awarded to Mr. Leidel pursuant to the Mid-Con Energy Partners, LP Long-Term Incentive Program.

F2 · balance_after: Excludes 216,410 common units representing limited partner interests in the issuer that the reporting contributed to The Peter A. Leidel, 2015 GRAT on August 21, 2015. The reporting person is the sole trustee and beneficiary of such trust.

SEC source: 0001655020-18-000057 · wf-form4_152573446095565.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 143,019

F1 · shares: Represents an award of 9,103 unvested restricted stock units, which vest on May 3, 2019, subject to continued service through the vesting date, and will be settled in shares of common stock.

SEC source: 0000899243-18-009810 · doc4.xml · derivative · entry 7

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 50,000

Underlying: Common Stock, par value $0.01 per share · 50,000 shares

Expires not disclosed

F10 · derivative.exercise_price: The Series B Convertible Preferred Stock converts into shares of the Issuer's common stock at the election of the holder and will automatically convert into shares of the Issuer's common stock if and when the Issuer completes a qualifying equity financing. The number of shares of common stock issuable upon conversion is dependent upon the price per share of common stock issued in connection with any such qualifying equity financing, but has an initial floor conversion price equal to $8.00 per share. The conversion price will be proportionately increased or decreased to reflect changes to the outstanding shares of common stock, such as the result of a combination, reclassification, subdivision, stock split, stock dividend or other similar transaction involving the common stock.

F11 · derivative.expiration_date: The Series B Convertible Preferred Stock has no expiration date. However, it converts into shares of the Issuer's common stock at the election of the holder and will automatically convert into shares of the Issuer's common stock if and when the Issuer completes a qualifying equity financing.

F3 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

F4 · ownership.nature: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-18-009810 · doc4.xml · nonDerivative · entry 2

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,000

F5 · kind: Restricted stock grant.

SEC source: 0001209191-18-022103 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,895

F1 · shares: Bona fide gift of common units donated to The American Spectator Foundation.

F2 · balance_after: Excludes 216,410 common units representing limited partner interests in the issuer that the reporting contributed to The Peter A. Leidel, 2015 GRAT on August 21, 2015. The reporting person is the sole trustee and beneficiary of such trust.

SEC source: 0001209191-18-016528 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,895

F1 · shares: Common units awarded to Mr. Leidel pursuant to the Mid-Con Energy Partners, LP Long-Term Incentive Program.

F2 · balance_after: Excludes 216,410 common units representing limited partner interests in the issuer that the reporting contributed to The Peter A. Leidel, 2015 GRAT on August 21, 2015. The reporting person is the sole trustee and beneficiary of such trust.

SEC source: 0000899243-18-009810 · doc4.xml · derivative · entry 6

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 per share · 1,527,778 shares

Expires 2024-02-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: The consideration Yorktown XI paid for the full exercise of the Warrant was the transfer and assignment to Carbon Natural Gas Company (the "Issuer") of 11,000 Class A Units of Carbon California Company, LLC, a Delaware limited liability company.

F9 · shares: On March 15, 2017, the Issuer effected a one for twenty reverse stock split of the Issuer's issued and outstanding common stock, as reported on the Current Report on Form 8-K filed by the Issuer with the SEC on March 16, 2017. As a result, the number of shares of common stock underlying the Warrant was proportionately reduced from 30,555,556 to 1,527,778.

F2 · price: The consideration Yorktown XI paid for the full exercise of the Warrant was the transfer and assignment to Carbon Natural Gas Company (the "Issuer") of 11,000 Class A Units of Carbon California Company, LLC, a Delaware limited liability company.

F9 · derivative.underlying_shares: On March 15, 2017, the Issuer effected a one for twenty reverse stock split of the Issuer's issued and outstanding common stock, as reported on the Current Report on Form 8-K filed by the Issuer with the SEC on March 16, 2017. As a result, the number of shares of common stock underlying the Warrant was proportionately reduced from 30,555,556 to 1,527,778.

F3 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

F4 · ownership.nature: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-18-009810 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,527,778

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares received upon exercise of Warrant No. 1, issued on February 15, 2017 (the "Warrant") to Yorktown Energy Partners XI, L.P. ("Yorktown XI").

F2 · price: The consideration Yorktown XI paid for the full exercise of the Warrant was the transfer and assignment to Carbon Natural Gas Company (the "Issuer") of 11,000 Class A Units of Carbon California Company, LLC, a Delaware limited liability company.

F3 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

F4 · ownership.nature: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-18-024689 · doc4.xml · derivative · entry 6

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 per share · 432,051 shares

Expires 2024-04-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: The consideration Yorktown XI paid for the full exercise of the CAC Warrant was the transfer and assignment to Carbon Natural Gas Company (the "Issuer") of 2,940 Class A Units of Carbon Appalachian Company, LLC, a Delaware limited liability company.

F2 · price: The consideration Yorktown XI paid for the full exercise of the CAC Warrant was the transfer and assignment to Carbon Natural Gas Company (the "Issuer") of 2,940 Class A Units of Carbon Appalachian Company, LLC, a Delaware limited liability company.

F4 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

F5 · ownership.nature: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-18-024689 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 432,051

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares received upon exercise of Warrant No. 2, issued on April 3, 2017 (the "CAC Warrant") to Yorktown Energy Partners XI, L.P. ("Yorktown XI").

F2 · price: The consideration Yorktown XI paid for the full exercise of the CAC Warrant was the transfer and assignment to Carbon Natural Gas Company (the "Issuer") of 2,940 Class A Units of Carbon Appalachian Company, LLC, a Delaware limited liability company.

F3 · balance_after: These shares were inadvertently omitted from one Form 4 filed by the reporting person on April 9, 2018.

F4 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

F5 · ownership.nature: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0001179110-17-006851 · edgar.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 133,916

F1 · shares: Represents an award of 8,916 unvested restricted stock units, which vest on May 4, 2018, subject to continued service through the vesting date, and will be settled in shares of common stock.

SEC source: 0000899243-17-009563 · doc4.xml · derivative · entry 5

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 408,334

Underlying: Common Stock · 408,334 shares

Expires 2024-04-03

F6 · derivative.exercise_price: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of the Issuer determined, as of the time of exercise, by dividing the aggregate Priority Amount attributable to Yorktown XI's Class A units of Carbon Appalachian Company, LLC, a Delaware limited liability company ("CAC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CAC, and additional capital contributions made by Yorktown XI to CAC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F7 · derivative.exercise_price: (continued from Footnote 6) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CAC in accordance with the formula set forth in the warrant.

F6 · shares: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of the Issuer determined, as of the time of exercise, by dividing the aggregate Priority Amount attributable to Yorktown XI's Class A units of Carbon Appalachian Company, LLC, a Delaware limited liability company ("CAC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CAC, and additional capital contributions made by Yorktown XI to CAC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F7 · shares: (continued from Footnote 6) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CAC in accordance with the formula set forth in the warrant.

F6 · price: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of the Issuer determined, as of the time of exercise, by dividing the aggregate Priority Amount attributable to Yorktown XI's Class A units of Carbon Appalachian Company, LLC, a Delaware limited liability company ("CAC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CAC, and additional capital contributions made by Yorktown XI to CAC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F7 · price: (continued from Footnote 6) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CAC in accordance with the formula set forth in the warrant.

F6 · derivative.underlying_shares: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of the Issuer determined, as of the time of exercise, by dividing the aggregate Priority Amount attributable to Yorktown XI's Class A units of Carbon Appalachian Company, LLC, a Delaware limited liability company ("CAC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CAC, and additional capital contributions made by Yorktown XI to CAC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F7 · derivative.underlying_shares: (continued from Footnote 6) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CAC in accordance with the formula set forth in the warrant.

F6 · balance_after: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of the Issuer determined, as of the time of exercise, by dividing the aggregate Priority Amount attributable to Yorktown XI's Class A units of Carbon Appalachian Company, LLC, a Delaware limited liability company ("CAC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CAC, and additional capital contributions made by Yorktown XI to CAC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F7 · balance_after: (continued from Footnote 6) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CAC in accordance with the formula set forth in the warrant.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners V, L.P. The reporting person is a member and a manager of the general partner of Yorktown Energy Partners V, L.P.

F8 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

SEC source: 0001213900-17-003735 · f4032017leidel_carbon.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,000

F1 · kind: Restricted stock grant.

F2 · balance_after: On March 15, 2017, Carbon Natural Gas Company (the "Issuer") effected a one for twenty reverse stock split of the Issuer's issued and outstanding common stock, as reported on the Current Report on Form 8-K filed by the Issuer with the SEC on March 16, 2017.

SEC source: 0001209191-17-016543 · doc4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,895

F1 · shares: Common units awarded to Mr. Leidel pursuant to the Mid-Con Energy Partners, LP Long-Term Incentive Program.

F2 · balance_after: Excludes 216,410 common units representing limited partner interests in the issuer that the reporting contributed to The Peter A. Leidel, 2015 GRAT on August 21, 2015. The reporting person is the sole trustee and beneficiary of such trust.

SEC source: 0000899243-17-004595 · doc4.xml · derivative · entry 5

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 30,555,556

Underlying: Common Stock · 30,555,556 shares

Expires 2024-02-15

F5 · derivative.exercise_price: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of Carbon Natural Gas Company (the "Issuer") determined, as of the time of exercise, by dividing the aggregate unreturned capital of Yorktown XI's Class A units of Carbon California Company, LLC, a Delaware limited liability company ("CCC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CCC, and additional capital contributions made by Yorktown XI to CCC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F6 · derivative.exercise_price: (Continued From Footnote 5) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CCC in accordance with the formula set forth in the warrant.

F5 · shares: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of Carbon Natural Gas Company (the "Issuer") determined, as of the time of exercise, by dividing the aggregate unreturned capital of Yorktown XI's Class A units of Carbon California Company, LLC, a Delaware limited liability company ("CCC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CCC, and additional capital contributions made by Yorktown XI to CCC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F6 · shares: (Continued From Footnote 5) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CCC in accordance with the formula set forth in the warrant.

F5 · price: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of Carbon Natural Gas Company (the "Issuer") determined, as of the time of exercise, by dividing the aggregate unreturned capital of Yorktown XI's Class A units of Carbon California Company, LLC, a Delaware limited liability company ("CCC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CCC, and additional capital contributions made by Yorktown XI to CCC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F6 · price: (Continued From Footnote 5) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CCC in accordance with the formula set forth in the warrant.

F5 · derivative.underlying_shares: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of Carbon Natural Gas Company (the "Issuer") determined, as of the time of exercise, by dividing the aggregate unreturned capital of Yorktown XI's Class A units of Carbon California Company, LLC, a Delaware limited liability company ("CCC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CCC, and additional capital contributions made by Yorktown XI to CCC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F6 · derivative.underlying_shares: (Continued From Footnote 5) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CCC in accordance with the formula set forth in the warrant.

F5 · balance_after: The warrant gives Yorktown Energy Partners XI, L.P. ("Yorktown XI") the right to purchase a number of shares of common stock of Carbon Natural Gas Company (the "Issuer") determined, as of the time of exercise, by dividing the aggregate unreturned capital of Yorktown XI's Class A units of Carbon California Company, LLC, a Delaware limited liability company ("CCC"), then held by Yorktown XI by the exercise price then in effect. The number of shares of common stock of the Issuer and the exercise price are subject to certain adjustments from time to time as set forth in the warrant, including adjustments upon the subdivision or combination of shares of common stock of the Issuer, payment of dividends by the Issuer, distributions by CCC, and additional capital contributions made by Yorktown XI to CCC. The amounts set forth above represent the number of shares of common stock and the exercise price as of the date of the issuance of the warrant.

F6 · balance_after: (Continued From Footnote 5) In consideration of the exercise of the warrant, Yorktown XI shall transfer and assign to the Issuer a number of Class A units of CCC in accordance with the formula set forth in the warrant.

F7 · ownership.nature: These securities are directly owned by Yorktown XI. The reporting person is a member and a manager of the general partner of the general partner of Yorktown XI.

F2 · ownership.nature: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0001104659-16-150972 · a4.xml · nonDerivative · entry 1

LEIDEL PETER A · CIK 0001225207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 125,000

F1 · shares: Represents an award of 125,000 unvested restricted stock units, which vest on October 17, 2017, subject to continued service through the vesting date, and will be settled in shares of common stock.