Keenan W Howard JR

SEC source: 0001104659-26-115568 · tm2627465-3_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 159,706

SEC source: 0001104659-26-115566 · tm2627461-4_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 374,435

SEC source: 0001628280-26-058885 · wk-form4_1787688865.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,039

F1 · shares: Restricted Stock Award pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The award vests in full on the first anniversary of the grant date.

F2 · balance_after: Includes 2,989 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001104659-26-083577 · tm2620323-5_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 372,938

SEC source: 0001104659-26-083582 · tm2620325-8_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 157,691

SEC source: 0001628280-26-032509 · wk-form4_1778200715.xml · derivative · entry 4

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 5,079,234

Underlying: Class A Common Stock · 2,000,000 shares

Expires not disclosed

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.

F5 · derivative.exercise_price: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F5 · price: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F5 · derivative.exercise_date: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F5 · derivative.expiration_date: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F4 · ownership.nature: These securities are owned directly by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"). The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0001628280-26-032509 · wk-form4_1778200715.xml · nonDerivative · entry 3

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F4 · ownership.nature: These securities are owned directly by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"). The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0001628280-26-032509 · wk-form4_1778200715.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,000,000

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 · kind: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F2 · price: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F4 · ownership.nature: These securities are owned directly by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"). The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0001628280-26-032509 · wk-form4_1778200715.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 5,079,234

F1 · security: Each share of Class B common stock has no economic rights but entitles its holder to one vote on all matters to be voted on by stockholders generally.

F2 · kind: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F2 · price: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F3 · balance_after: 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.

F4 · ownership.nature: These securities are owned directly by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"). The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0001104659-26-043261 · tm2611719-7_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 371,321

SEC source: 0001104659-26-043291 · tm2611722-8_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,784

SEC source: 0001104659-26-002662 · tm262859-4_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 369,903

SEC source: 0001104659-26-002643 · tm262857-5_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 154,167

SEC source: 0001193125-25-240640 · ownership.xml · derivative · entry 3

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Class A Common Stock · 9,304,608 shares

Expires not disclosed

F1 · derivative.exercise_price: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · derivative.exercise_price: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F1 · price: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · price: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F1 · derivative.exercise_date: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · derivative.exercise_date: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F1 · derivative.expiration_date: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · derivative.expiration_date: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F4 · ownership.nature: These securities are held directly by Yorktown XI, whose general partner is Yorktown XI Company LP ("Yorktown XI Company"), whose general partner is Yorktown XI Associates LLC ("Yorktown XI Associates"). The Reporting Person is a managing member of Yorktown XI Associates. The Reporting Person, Yorktown XI Company and Yorktown XI Associates are indirect beneficial owners of the reported securities.

SEC source: 0001193125-25-240640 · ownership.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · kind: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · kind: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F1 · shares: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · shares: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F1 · price: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · price: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F4 · ownership.nature: These securities are held directly by Yorktown XI, whose general partner is Yorktown XI Company LP ("Yorktown XI Company"), whose general partner is Yorktown XI Associates LLC ("Yorktown XI Associates"). The Reporting Person is a managing member of Yorktown XI Associates. The Reporting Person, Yorktown XI Company and Yorktown XI Associates are indirect beneficial owners of the reported securities.

SEC source: 0001193125-25-240640 · ownership.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · kind: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F3 · kind: This amount includes 4,426 shares of Issuer Class A Common Stock subject to awards of time-vesting restricted stock units ("Issuer RSU Awards") held by the Reporting Person. At the Effective Time, each Issuer RSU Award was converted into the right to receive an amount in cash equal to (i) the total number of shares of Issuer Class A Common Stock subject to such Issuer RSU Award, multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid cash-based dividend equivalents.

F1 · shares: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · shares: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F3 · shares: This amount includes 4,426 shares of Issuer Class A Common Stock subject to awards of time-vesting restricted stock units ("Issuer RSU Awards") held by the Reporting Person. At the Effective Time, each Issuer RSU Award was converted into the right to receive an amount in cash equal to (i) the total number of shares of Issuer Class A Common Stock subject to such Issuer RSU Award, multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid cash-based dividend equivalents.

F1 · price: As of the effective time (the "Effective Time") of the transactions contemplated by the Agreement and Plan of Merger entered into on August 6, 2025, by and among the Issuer, Western Midstream Partners, LP ("Parent"), Arrakis OpCo Merger Sub LLC, Arrakis Holdings Inc., Arrakis Unit Merger Sub LLC, Arrakis Cash Merger Sub LLC and Aris Water Holdings, LLC ("Aris OpCo"), each issued and outstanding share of the Issuer's Class A common stock, par value $0.01 per share ("Issuer Class A Common Stock") and each Aris OpCo Unit and a corresponding share of Issuer Class B common stock, par value $0.01 per share ("Issuer Class B Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time, was converted into the right to receive, pursuant to an election made by the Reporting Person, one of the following forms of consideration:

F2 · price: cont'd from Footnote 1: (i) $7.00 in cash (without interest) and 0.450 common units representing limited partnership interests in Parent ("Parent Common Units"); (ii) $25.00 in cash (without interest); (iii) 0.625 Parent Common Units ("Common Unit Election Consideration"), or (iv) in the event of the Reporting Person's failure to timely deliver an election, the Common Unit Election Consideration.

F3 · price: This amount includes 4,426 shares of Issuer Class A Common Stock subject to awards of time-vesting restricted stock units ("Issuer RSU Awards") held by the Reporting Person. At the Effective Time, each Issuer RSU Award was converted into the right to receive an amount in cash equal to (i) the total number of shares of Issuer Class A Common Stock subject to such Issuer RSU Award, multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid cash-based dividend equivalents.

SEC source: 0001104659-25-099320 · tm2528664-2_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 368,191

SEC source: 0001104659-25-099336 · tm2528665-8_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,109

SEC source: 0001415889-25-023027 · form4-08262025_040806.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,050

F1 · shares: Restricted Stock Award pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The award vests in full on the first anniversary of the grant date.

F2 · balance_after: Includes 5,518 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001104659-25-067783 · tm2520707-7_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 366,491

SEC source: 0001104659-25-067766 · tm2520706-1_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,174

SEC source: 0001140361-25-019375 · form4.xml · nonDerivative · entry 3

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · shares: 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.

F4 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.03 to $40.57, inclusive.

F1 · balance_after: 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.

F5 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001140361-25-019375 · form4.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 38,013

F1 · shares: 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.

F3 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.94 to $41.27, inclusive.

F1 · balance_after: 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.

F5 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001140361-25-019375 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 516,811

F1 · shares: 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.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.13 to $40.94, inclusive. The reporting person undertakes to Antero Resources Corp. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (2), (3), and (4).

F1 · balance_after: 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.

F5 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001104659-25-034733 · tm2512261-4_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 364,992

SEC source: 0001104659-25-034722 · tm2512259-1_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,132

SEC source: 0001140361-25-009503 · form4.xml · derivative · entry 5

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 9,304,608

Underlying: Class A Common Stock · 9,304,608 shares

Expires not disclosed

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 · derivative.exercise_price: On March 17, 2025, Yorktown Energy Partners XI, L.P. ("Yorktown XI") requested that 1,000,000 shares of Class B common stock of the Issuer ("Class B common stock") and 1,000,000 units of Solaris Midstream Holdings, LLC ("Solaris LLC") be redeemed, and Solaris LLC elected to redeem such securities for an aggregate of 1,000,000 shares of Class A common stock of the Issuer.

F5 · derivative.exercise_price: Subject to certain limitations and exceptions described in the Fourth Amended and Restated Limited Liability Company Agreement of Solaris LLC, the units of Solaris LLC are redeemable from time to time for shares of Class A common stock (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions), with a corresponding number of shares of Class B common stock cancelled for no consideration.

F1 · kind: On March 17, 2025, Yorktown Energy Partners XI, L.P. ("Yorktown XI") requested that 1,000,000 shares of Class B common stock of the Issuer ("Class B common stock") and 1,000,000 units of Solaris Midstream Holdings, LLC ("Solaris LLC") be redeemed, and Solaris LLC elected to redeem such securities for an aggregate of 1,000,000 shares of Class A common stock of the Issuer.

F2 · shares: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interests 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.

F5 · price: Subject to certain limitations and exceptions described in the Fourth Amended and Restated Limited Liability Company Agreement of Solaris LLC, the units of Solaris LLC are redeemable from time to time for shares of Class A common stock (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions), with a corresponding number of shares of Class B common stock cancelled for no consideration.

F5 · derivative.exercise_date: Subject to certain limitations and exceptions described in the Fourth Amended and Restated Limited Liability Company Agreement of Solaris LLC, the units of Solaris LLC are redeemable from time to time for shares of Class A common stock (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions), with a corresponding number of shares of Class B common stock cancelled for no consideration.

F5 · derivative.expiration_date: Subject to certain limitations and exceptions described in the Fourth Amended and Restated Limited Liability Company Agreement of Solaris LLC, the units of Solaris LLC are redeemable from time to time for shares of Class A common stock (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions), with a corresponding number of shares of Class B common stock cancelled for no consideration.

F2 · derivative.underlying_shares: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interests 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.

F2 · balance_after: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interests 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.

F3 · ownership.nature: These securities are held directly by Yorktown XI, whose general partner is Yorktown XI Company LP ("Yorktown XI Company"), whose general partner is Yorktown XI Associates LLC ("Yorktown XI Associates"). The reporting person is a managing member of Yorktown XI Associates. The reporting person, Yorktown XI Company and Yorktown XI Associates are indirect beneficial owners of the reported securities.

SEC source: 0001140361-25-009503 · form4.xml · nonDerivative · entry 3

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 9,304,608

F4 · security: Each share of Class B common stock has no economic rights but entitles its holder to one vote on all matters to be voted on by stockholders generally.

F1 · kind: On March 17, 2025, Yorktown Energy Partners XI, L.P. ("Yorktown XI") requested that 1,000,000 shares of Class B common stock of the Issuer ("Class B common stock") and 1,000,000 units of Solaris Midstream Holdings, LLC ("Solaris LLC") be redeemed, and Solaris LLC elected to redeem such securities for an aggregate of 1,000,000 shares of Class A common stock of the Issuer.

F1 · price: On March 17, 2025, Yorktown Energy Partners XI, L.P. ("Yorktown XI") requested that 1,000,000 shares of Class B common stock of the Issuer ("Class B common stock") and 1,000,000 units of Solaris Midstream Holdings, LLC ("Solaris LLC") be redeemed, and Solaris LLC elected to redeem such securities for an aggregate of 1,000,000 shares of Class A common stock of the Issuer.

F5 · price: Subject to certain limitations and exceptions described in the Fourth Amended and Restated Limited Liability Company Agreement of Solaris LLC, the units of Solaris LLC are redeemable from time to time for shares of Class A common stock (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions), with a corresponding number of shares of Class B common stock cancelled for no consideration.

F2 · balance_after: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interests 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.

F3 · ownership.nature: These securities are held directly by Yorktown XI, whose general partner is Yorktown XI Company LP ("Yorktown XI Company"), whose general partner is Yorktown XI Associates LLC ("Yorktown XI Associates"). The reporting person is a managing member of Yorktown XI Associates. The reporting person, Yorktown XI Company and Yorktown XI Associates are indirect beneficial owners of the reported securities.

SEC source: 0001140361-25-009503 · form4.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F2 · balance_after: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interests 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.

F3 · ownership.nature: These securities are held directly by Yorktown XI, whose general partner is Yorktown XI Company LP ("Yorktown XI Company"), whose general partner is Yorktown XI Associates LLC ("Yorktown XI Associates"). The reporting person is a managing member of Yorktown XI Associates. The reporting person, Yorktown XI Company and Yorktown XI Associates are indirect beneficial owners of the reported securities.

SEC source: 0001140361-25-009503 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,000,000

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 · kind: On March 17, 2025, Yorktown Energy Partners XI, L.P. ("Yorktown XI") requested that 1,000,000 shares of Class B common stock of the Issuer ("Class B common stock") and 1,000,000 units of Solaris Midstream Holdings, LLC ("Solaris LLC") be redeemed, and Solaris LLC elected to redeem such securities for an aggregate of 1,000,000 shares of Class A common stock of the Issuer.

F1 · price: On March 17, 2025, Yorktown Energy Partners XI, L.P. ("Yorktown XI") requested that 1,000,000 shares of Class B common stock of the Issuer ("Class B common stock") and 1,000,000 units of Solaris Midstream Holdings, LLC ("Solaris LLC") be redeemed, and Solaris LLC elected to redeem such securities for an aggregate of 1,000,000 shares of Class A common stock of the Issuer.

F2 · balance_after: The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interests 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.

F3 · ownership.nature: These securities are held directly by Yorktown XI, whose general partner is Yorktown XI Company LP ("Yorktown XI Company"), whose general partner is Yorktown XI Associates LLC ("Yorktown XI Associates"). The reporting person is a managing member of Yorktown XI Associates. The reporting person, Yorktown XI Company and Yorktown XI Associates are indirect beneficial owners of the reported securities.

SEC source: 0001865187-25-000054 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,485

F1 · shares: Represents an annual award of restricted stock units ("RSUs") as compensation for the Reporting Person's duties as a non-employee director of the Issuer. The award of RSUs was granted under the Aris Water Solutions, Inc. 2021 Equity Incentive Plan. Each RSU represents the right to receive one share of the Issuer's Class A common stock. The RSUs will vest on the earliest to occur of: (i) the date of the Issuer's 2026 annual meeting of stockholders if the Reporting Person is not continuing on the Issuer's board of directors or (ii) March 1, 2026. Settlement of all or a portion of the vested RSUs may be deferred by the Reporting Person, in which case, settlement will occur pursuant to the terms of the Reporting Person's applicable deferral election.

SEC source: 0001140361-25-005296 · form4.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,100,000

F1 · shares: 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.

F4 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.20 to $41.17, inclusive. The reporting person undertakes to Antero Resources Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

F1 · balance_after: 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.

F3 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001140361-25-005296 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,800,000

F1 · shares: 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.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.65 to $40.17, inclusive. The reporting person undertakes to Antero Resources Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

F1 · balance_after: 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.

F3 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001104659-25-003149 · tm253176-4_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 363,309

SEC source: 0001104659-25-003144 · tm253177-4_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,889

SEC source: 0000950170-24-137913 · ownership.xml · derivative · entry 5

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 7,079,234

Underlying: Class A Common Stock · 975,000 shares

Expires not disclosed

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.

F7 · derivative.exercise_price: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F7 · price: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F7 · derivative.exercise_date: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F7 · derivative.expiration_date: Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock.

F5 · ownership.nature: These securities are owned directly by Yorktown X. The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0000950170-24-137913 · ownership.xml · nonDerivative · entry 3

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 7,079,234

F3 · security: Each share of Class B common stock has no economic rights but entitles the holder to one vote on all matters to be voted on by the stockholders generally.

F1 · kind: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F1 · price: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F4 · balance_after: 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.

F5 · ownership.nature: These securities are owned directly by Yorktown X. The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0000950170-24-137913 · ownership.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F2 · kind: As previously disclosed in the Issuer's prospectus supplement dated December 10, 2024, filed with the U.S. Securities and Exchange Commission on December 11, 2024, on December 11, 2024, the Issuer completed a public underwritten offering of shares of Class A common stock, par value $0.01 per share (the "Offering"). On December 16, 2024, in connection with the underwriters' exercise of their option to purchase additional shares of Class A common stock in the Offering, Yorktown X sold 975,000 shares of Class A common stock at a price to the public of $24.75 per share, or a net per share price of $24.0075 after deducting $0.7425 per share of underwriting discounts and commissions.

F2 · price: As previously disclosed in the Issuer's prospectus supplement dated December 10, 2024, filed with the U.S. Securities and Exchange Commission on December 11, 2024, on December 11, 2024, the Issuer completed a public underwritten offering of shares of Class A common stock, par value $0.01 per share (the "Offering"). On December 16, 2024, in connection with the underwriters' exercise of their option to purchase additional shares of Class A common stock in the Offering, Yorktown X sold 975,000 shares of Class A common stock at a price to the public of $24.75 per share, or a net per share price of $24.0075 after deducting $0.7425 per share of underwriting discounts and commissions.

F5 · ownership.nature: These securities are owned directly by Yorktown X. The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0000950170-24-137913 · ownership.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 975,000

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 · kind: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F1 · price: Pursuant to the Second Amended and Restated Limited Liability Company Agreement of Solaris Energy Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.4 to Solaris Energy Infrastructure, Inc.'s (the "Issuer") Annual Report on Form 10-K for the year ended December 31, 2023 (as amended, the "Solaris LLC Agreement"), the shares of the Issuer's Class B common stock reported herein were cancelled for no consideration on a one-for-one basis upon the redemption by Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), of units in Solaris LLC ("Solaris LLC Units") (together with a corresponding number of shares of the Issuer's Class B common stock, par value $0.00 per share ("Class B common stock")) for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock") reported herein.

F5 · ownership.nature: These securities are owned directly by Yorktown X. The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X.

SEC source: 0001104659-24-108865 · tm2426085-7_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 361,907

SEC source: 0001104659-24-108859 · tm2426086-7_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,587

SEC source: 0001415889-24-022302 · form4-08272024_040814.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,532

F1 · shares: Restricted Stock Award pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The award vests in full on the first anniversary of the grant date.

F2 · balance_after: Includes 11,945 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001104659-24-079296 · tm2419266-7_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 360,044

SEC source: 0001104659-24-079285 · tm2419265-4_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,279

SEC source: 0001865187-24-000028 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,059

F1 · shares: Represents an annual award of restricted stock units ("RSUs") as compensation for the Reporting Person's duties as a non-employee director of the Issuer. The award of RSUs was granted under the Aris Water Solutions, Inc. 2021 Equity Incentive Plan. Each RSU represents the right to receive one share of the Issuer's Class A common stock. The RSUs will vest on the earliest to occur of: (i) the date of the Issuer's 2025 annual meeting of stockholders if the Reporting Person is not continuing on the Issuer's board of directors or (ii) July 1, 2025. Settlement of all or a portion of the vested RSUs may be deferred by the Reporting Person, in which case, settlement will occur pursuant to the terms of the Reporting Person's applicable deferral election.

SEC source: 0001140361-24-025532 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,000,000

F1 · shares: 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.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.10 to $33.61, inclusive. The reporting person undertakes to Antero Resources Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

F1 · balance_after: 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.

F3 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001140361-24-025244 · form4.xml · nonDerivative · entry 3

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,162,993

F1 · shares: 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.

F5 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.02 to $34.41, inclusive. The reporting person undertakes to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (5).

F1 · balance_after: 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.

F3 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001140361-24-025244 · form4.xml · nonDerivative · entry 2

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,462,993

F1 · shares: 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.

F4 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.00 to $34.65, inclusive. The reporting person undertakes to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

F1 · balance_after: 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.

F3 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001140361-24-025244 · form4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,900,000

F1 · shares: 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.

F2 · price: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.31 to $34.94, inclusive. The reporting person undertakes to Antero Resources Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

F1 · balance_after: 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.

F3 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The reporting person is a member and manager of Yorktown VIII Associates LLC, the general partner of Yorktown VIII Company LP, the general partner of Yorktown VIII.

SEC source: 0001104659-24-046409 · tm2411637-7_4seq1.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 358,366