Brock Amanda M

SEC source: 0001090012-26-000103 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,301

F1 · shares: Represents restricted stock granted on June 30, 2026, to vest 100% on the day immediately following the grant date.

SEC source: 0000858470-26-000154 · wk-form4_1778532384.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Pursuant to the Agreement and Plan of Merger entered into on February 1, 2026, by and among the Issuer, Devon Energy Corporation ("Devon") and Cubs Merger Sub, Inc., as of the effective time of the transactions contemplated thereby (the "Effective Time"), each share of the Issuer's common stock, par value $0.10 per share ("Issuer Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time was converted into the right to receive 0.7 shares of Devon common stock, par value $0.10 per share ("Devon Common Stock").

F1 · shares: Pursuant to the Agreement and Plan of Merger entered into on February 1, 2026, by and among the Issuer, Devon Energy Corporation ("Devon") and Cubs Merger Sub, Inc., as of the effective time of the transactions contemplated thereby (the "Effective Time"), each share of the Issuer's common stock, par value $0.10 per share ("Issuer Common Stock"), held by the Reporting Person as of immediately prior to the Effective Time was converted into the right to receive 0.7 shares of Devon common stock, par value $0.10 per share ("Devon Common Stock").

F2 · shares: This amount includes 49,344 shares of Issuer Common Stock subject to deferred awards of vested restricted stock units ("Deferred RSU Awards") held by the Reporting Person that, as of the Effective Time, were converted, on the same terms and conditions, into restricted stock unit awards covering a total number of shares of Devon Common Stock equal to the product of (i) the total number of shares of Issuer Common Stock subject to such Deferred RSU Awards as of immediately prior to the Effective Time, multiplied by (ii) 0.7.

SEC source: 0001193125-26-217468 · ownership.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,734

F1 · security: On May 7, 2026, pursuant to the Agreement and Plan of Merger entered into on February 1, 2026, by and among Devon Energy Corporation (''Devon''), Coterra Energy Inc. (''Coterra") and Cubs Merger Sub, Inc., as of the effective time of the transactions contemplated thereby (the "Effective Time"), each share of Coterra's common stock, par value $0.10 per share ("Coterra Common Stock") was converted into the right to receive 0.7 shares of Devon's common stock, par value $0.10 per share ("Devon Common Stock"), subject to certain exceptions.

F2 · shares: This amount includes 34,541 shares of Devon Common Stock subject to restricted stock unit awards that, as of the Effective Time, were converted, on the same terms and conditions, from the corresponding deferred awards of vested restricted stock units relating to Coterra Common Stock ("Coterra Deferred RSU Awards") held by the reporting person into restricted stock unit awards covering a total number of shares of Devon Common Stock equal to the product of (i) the total number of shares of Coterra Common Stock subject to such Coterra Deferred RSU Awards as of immediately prior to the Effective Time, multiplied by (ii) 0.7.

F1 · price: On May 7, 2026, pursuant to the Agreement and Plan of Merger entered into on February 1, 2026, by and among Devon Energy Corporation (''Devon''), Coterra Energy Inc. (''Coterra") and Cubs Merger Sub, Inc., as of the effective time of the transactions contemplated thereby (the "Effective Time"), each share of Coterra's common stock, par value $0.10 per share ("Coterra Common Stock") was converted into the right to receive 0.7 shares of Devon's common stock, par value $0.10 per share ("Devon Common Stock"), subject to certain exceptions.

SEC source: 0001628280-26-014094 · wk-form4_1772577923.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · Co-Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 276,080

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

F2 · balance_after: Includes 260,000 shares of Class A common stock from previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001714868-25-000012 · form4-12182025_091211.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · Co-Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,080

F1 · balance_after: Includes 125,000 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001714868-25-000010 · form4-10172025_081045.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · Co-Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,411

F1 · shares: Restricted Stock Award pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The award vests in three equal annual installments on the first three anniversaries from November 15, 2025.

F2 · balance_after: Includes 125,000 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001193125-25-240614 · ownership.xml · derivative · entry 6

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 92,107 shares

Expires 2027-12-31

F4 · price: At the Effective Time, each outstanding award of performance-vesting restricted stock units ("Issuer PSU Awards") held by the Reporting Person 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 Aris PSU Award (assuming that any performance-based vesting conditions applicable to such Issuer PSU Award were achieved at the greater of (x) the target level of performance and (y) the greater of the actual level of performance through (1) August 13, 2025, and (2) the Effective Time), multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid dividend equivalents.

F4 · derivative.exercise_date: At the Effective Time, each outstanding award of performance-vesting restricted stock units ("Issuer PSU Awards") held by the Reporting Person 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 Aris PSU Award (assuming that any performance-based vesting conditions applicable to such Issuer PSU Award were achieved at the greater of (x) the target level of performance and (y) the greater of the actual level of performance through (1) August 13, 2025, and (2) the Effective Time), multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid dividend equivalents.

SEC source: 0001193125-25-240614 · ownership.xml · derivative · entry 5

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 271,188 shares

Expires 2026-12-31

F4 · price: At the Effective Time, each outstanding award of performance-vesting restricted stock units ("Issuer PSU Awards") held by the Reporting Person 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 Aris PSU Award (assuming that any performance-based vesting conditions applicable to such Issuer PSU Award were achieved at the greater of (x) the target level of performance and (y) the greater of the actual level of performance through (1) August 13, 2025, and (2) the Effective Time), multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid dividend equivalents.

F4 · derivative.exercise_date: At the Effective Time, each outstanding award of performance-vesting restricted stock units ("Issuer PSU Awards") held by the Reporting Person 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 Aris PSU Award (assuming that any performance-based vesting conditions applicable to such Issuer PSU Award were achieved at the greater of (x) the target level of performance and (y) the greater of the actual level of performance through (1) August 13, 2025, and (2) the Effective Time), multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid dividend equivalents.

SEC source: 0001193125-25-240614 · ownership.xml · derivative · entry 4

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 193,713 shares

Expires 2025-12-31

F4 · price: At the Effective Time, each outstanding award of performance-vesting restricted stock units ("Issuer PSU Awards") held by the Reporting Person 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 Aris PSU Award (assuming that any performance-based vesting conditions applicable to such Issuer PSU Award were achieved at the greater of (x) the target level of performance and (y) the greater of the actual level of performance through (1) August 13, 2025, and (2) the Effective Time), multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid dividend equivalents.

F4 · derivative.exercise_date: At the Effective Time, each outstanding award of performance-vesting restricted stock units ("Issuer PSU Awards") held by the Reporting Person 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 Aris PSU Award (assuming that any performance-based vesting conditions applicable to such Issuer PSU Award were achieved at the greater of (x) the target level of performance and (y) the greater of the actual level of performance through (1) August 13, 2025, and (2) the Effective Time), multiplied by (ii) $25.00, plus an additional amount in cash equal to any accrued but unpaid dividend equivalents.

SEC source: 0001193125-25-240614 · ownership.xml · derivative · entry 3

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 406,693 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:

SEC source: 0001193125-25-240614 · ownership.xml · nonDerivative · entry 2

Brock Amanda M · CIK 0001714868 · Director · President and CEO

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.

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 324,532 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.

SEC source: 0001193125-25-240614 · ownership.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

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 324,532 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 324,532 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 324,532 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: 0000858470-25-000133 · wk-form4_1746823518.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,621

F1 · shares: Represents an annual award of restricted stock units as compensation for the reporting persons duties as director, as described in the issuer's 2025 proxy statement, which award is subject to service-based vesting the restrictions on which lapse on the earlier to occur of (i) the termination of service as a director other than because of removal or (ii) May 1, 2026.

SEC source: 0001865187-25-000029 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 546,299

F1 · shares: Represents restricted stock units ("RSUs") 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 in the following installments: (i) one-third on March 1, 2026, (ii) one-third on March 1, 2027, and (iii) one-third on March 1, 2028.

SEC source: 0001865187-25-000015 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 409,801

F1 · shares: Surrender of shares in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001865187-25-000005 · form4.xml · nonDerivative · entry 2

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 471,250

F2 · shares: Surrender of shares in payment of tax withholding due as a result of the settlement of vested PSUs.

SEC source: 0001865187-25-000005 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 494,682

F1 · shares: Shares of Class A common stock received upon vesting of performance-based restricted stock units ("PSUs") granted under the Aris Water Solutions, Inc. 2021 Equity Incentive Plan.

SEC source: 0001865187-24-000052 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 421,973

F1 · shares: Surrender of shares on December 16, 2024 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001865187-24-000042 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 440,882

F1 · shares: Surrender of shares on October 22, 2024 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001865187-24-000018 · form4.xml · nonDerivative · entry 3

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 457,909

F3 · price: This transaction was executed in multiple trades at prices ranging from $16.55 to $16.78. The price reported above reflects the weighted average sale price rounded to the nearest cent. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

SEC source: 0001865187-24-000018 · form4.xml · nonDerivative · entry 2

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 487,909

F2 · price: This transaction was executed in multiple trades at prices ranging from $16.22 to $16.70. The price reported above reflects the weighted average sale price rounded to the nearest cent. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

SEC source: 0001865187-24-000018 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 549,963

F1 · price: This transaction was executed in multiple trades at prices ranging from $16.44 to $16.84. The price reported above reflects the weighted average sale price rounded to the nearest cent. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

SEC source: 0000858470-24-000091 · wk-form4_1715289102.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,328

F1 · shares: Represents an annual award of restricted stock units as compensation for the reporting persons duties as director, as described in the issuer's 2024 proxy statement, which award is subject to service-based vesting, the restrictions on which lapse on the earlier to occur of (i) the termination of the service as a director other than because of removal or (ii) April 30, 2025.

SEC source: 0001865187-24-000011 · form4.xml · nonDerivative · entry 2

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 657,909

F2 · shares: Represents 203,390 restricted stock units ("RSUs") 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 in the following installments: (i) one-third on March 1, 2025, (ii) one-third on March 1, 2026, and (iii) one-third on March 1, 2027.

SEC source: 0001865187-24-000011 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 454,519

F1 · shares: Surrender of shares on March 1, 2024 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001865187-23-000070 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 489,293

F1 · shares: Surrender of shares on December 18, 2023 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001865187-23-000053 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 508,202

F1 · shares: Surrender of shares on October 23, 2023 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001209191-23-029022 · doc4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,205

F1 · shares: Represents an annual award of restricted stock units as compensation for the reporting person's duties as director, as described in the issuer's 2023 proxy statement, the restrictions on which lapse on the earlier to occur of (i) the termination of the service as a director other than because of removal or (ii) May 4, 2024.

F2 · balance_after: The amount of securities beneficially owned as reported in column 5 includes 49,344 restricted stock units as to which the remaining restrictions lapse upon the reporting person's retirement from the issuer's board of directors.

SEC source: 0001865187-23-000018 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 525,229

F1 · shares: Represents 157,301 restricted stock units ("RSUs") 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 in the following installments: (i) one-third on March 1, 2024, (ii) one-third on March 1, 2025, and (iii) one-third on March 1, 2026.

SEC source: 0001865187-23-000008 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 367,928

F1 · shares: Surrender of shares on March 1, 2023 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001140361-22-046095 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 376,853

F1 · shares: Surrender of shares on December 16, 2022 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001140361-22-038400 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 395,761

F1 · shares: Surrender of shares on October 24, 2022 in payment of tax withholding due as a result of the settlement of vested restricted stock units.

SEC source: 0001104659-22-081473 · tm2221392-11_4seq1.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · security: On September 22, 2021, Macquarie Infrastructure Holdings, LLC (the "Company") became the successor of Macquarie Infrastructure Corporation ("MIC Corp") pursuant to a reorganization merger. The reorganization merger resulted in the Company becoming a parent holding company of MIC Corp, but did not alter the proportionate interests of security holders. Pursuant to the reorganization merger agreement, each outstanding share of MIC Corp common stock, par value $0.001 per share, issued and outstanding immediately prior to the reorganization merger was converted into common units of the Company ("Common Units"), on a one for one basis without an exchange of certificates.

F2 · price: Disposed of in connection with the Agreement and Plan of Merger by and among the Company, AMF Hawaii Holdings, LLC, AMF Hawaii Merger Sub, LLC and MIC Corp, pursuant to which each Common Unit issued and outstanding was converted into the right to receive $4.11 in cash, without interest.

SEC source: 0001209191-23-008063 · doc5.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,028

F1 · shares: Represents an annual award of restricted stock units as compensation for the reporting person's duties as director, as described in the issuer's 2022 proxy statement, which award is subject to service-based vesting, the restrictions on which lapse on the earlier to occur of (i) the termination of the service as a director other than because of removal or (ii) April 3, 2023.

F2 · balance_after: The amount of securities beneficially owned as reported in column 5 includes 49,344 restricted stock units as to which the restrictions lapse upon the reporting person's retirement from the issuer's board of directors.

SEC source: 0001140361-22-007701 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 425,032

F1 · shares: Represents 107,803 restricted stock units ("RSUs") 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 in the following installments: (i) one-third on March 1, 2023, (ii) one-third on March 1, 2024, and (iii) one-third on March 1, 2025.

SEC source: 0001140361-21-042281 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 317,229

F1 · shares: Represents 144,152 restricted stock units ("RSUs") 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 in the following installments: (i) one-third on December 16, 2022, (ii) one-third on December 16, 2023, and (iii) one-third on December 16, 2024.

SEC source: 0001140361-21-035822 · form4.xml · derivative · entry 3

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 0 shares

Expires not disclosed

F3 · shares: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners will be converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC will distribute to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange.

F4 · shares: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it receives pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person will be reported on an amendment to this Form 4 as soon as practicable once the number of Solaris LLC Units and shares of Class B common stock are determined pursuant to the Solaris LLC Agreement.

F5 · derivative.exercise_date: Subject to certain limitations and exceptions described in the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are redeemable from time to time for shares of Class A common stock of the Issuer (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions).

F5 · derivative.expiration_date: Subject to certain limitations and exceptions described in the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are redeemable from time to time for shares of Class A common stock of the Issuer (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions).

F3 · derivative.underlying_shares: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners will be converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC will distribute to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange.

F4 · derivative.underlying_shares: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it receives pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person will be reported on an amendment to this Form 4 as soon as practicable once the number of Solaris LLC Units and shares of Class B common stock are determined pursuant to the Solaris LLC Agreement.

F3 · balance_after: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners will be converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC will distribute to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange.

F4 · balance_after: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it receives pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person will be reported on an amendment to this Form 4 as soon as practicable once the number of Solaris LLC Units and shares of Class B common stock are determined pursuant to the Solaris LLC Agreement.

SEC source: 0001140361-21-035822 · form4.xml · nonDerivative · entry 2

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F2 · 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.

F3 · shares: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners will be converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC will distribute to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange.

F4 · shares: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it receives pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person will be reported on an amendment to this Form 4 as soon as practicable once the number of Solaris LLC Units and shares of Class B common stock are determined pursuant to the Solaris LLC Agreement.

F3 · balance_after: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners will be converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC will distribute to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange.

F4 · balance_after: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it receives pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person will be reported on an amendment to this Form 4 as soon as practicable once the number of Solaris LLC Units and shares of Class B common stock are determined pursuant to the Solaris LLC Agreement.

SEC source: 0001140361-21-035822 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 173,077

F1 · shares: Represents 173,077 restricted stock units ("RSUs") 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 in the following installments: (i) 50% on October 22, 2022, (ii) 25% on October 22, 2023, and (iii) 25% on October 22, 2024.

SEC source: 0001140361-21-037306 · form4.xml · derivative · entry 2

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 406,693

Underlying: Class A Common Stock · 406,693 shares

Expires not disclosed

F2 · shares: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners were converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC distributed to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange (the "VWAP").

F3 · shares: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it received pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person was determined on November 5, 2021 based on the VWAP.

F4 · derivative.exercise_date: Subject to certain limitations and exceptions described in the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are redeemable from time to time for shares of Class A common stock of the Issuer (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions).

F4 · derivative.expiration_date: Subject to certain limitations and exceptions described in the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are redeemable from time to time for shares of Class A common stock of the Issuer (on a one-for-one basis, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions).

F2 · derivative.underlying_shares: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners were converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC distributed to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange (the "VWAP").

F3 · derivative.underlying_shares: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it received pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person was determined on November 5, 2021 based on the VWAP.

F2 · balance_after: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners were converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC distributed to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange (the "VWAP").

F3 · balance_after: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it received pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person was determined on November 5, 2021 based on the VWAP.

SEC source: 0001140361-21-037306 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 406,693

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 · shares: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners were converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC distributed to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange (the "VWAP").

F3 · shares: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it received pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person was determined on November 5, 2021 based on the VWAP.

F2 · balance_after: Immediately prior to closing of the Issuer's initial public offering, the Fourth Amended and Restated Limited Liability Company Agreement of Solaris Midstream Holdings, LLC ("Solaris LLC"), of which the Issuer is the managing member, became effective (the "Solaris LLC Agreement"). Pursuant to the Solaris LLC Agreement, (i) all of the membership interests in Solaris LLC held by its existing owners were converted into a single class of units in Solaris LLC ("Solaris LLC Units") and (ii) Solaris LLC distributed to its members one share of Class B common stock for each Solaris LLC Unit held by such members, in each case based on the average of the volume weighted average price of shares of the Issuer's Class A common stock for the 10 trading days commencing with the date of the initial listing of the Issuer's Class A common stock on the New York Stock Exchange (the "VWAP").

F3 · balance_after: The beneficial ownership interests of the Reporting Person are represented by limited liability company interests in Solaris Midstream Investment, LLC ("Solaris Investment"), which has advised the Issuer that it intends to distribute all of the Solaris LLC Units and shares of the Issuer's Class B common stock it received pursuant to the Solaris LLC Agreement to its members, including the Reporting Person. Solaris Investment is expected to be wound up and dissolved following the foregoing distribution. The number of Solaris LLC Units and shares of Class B common stock beneficially owned by the Reporting Person was determined on November 5, 2021 based on the VWAP.

SEC source: 0001157523-21-000705 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,458

F1 · shares: Consists of restricted stock units issued under the Issuer's 2014 Independent Directors Equity Plan and representing an equal number of shares of Common Stock issuable upon vesting of such units.

SEC source: 0001157523-21-000310 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,129

F1 · shares: Consists of restricted stock units issued under the Issuer's 2014 Independent Directors Equity Plan and representing an equal number of shares of Common Stock issuable upon vesting of such units. On January 8, 2021, the Issuer paid a special dividend of $11.00 per share of its common stock to stockholders of record as of January 5, 2021. These restricted stock units were granted by the compensation committee of the Board of Directors of the Issuer, in accordance with the terms of the Plan, to preserve the economic value of the award granted on May 14, 2020, after giving effect to the special dividend.

SEC source: 0001209191-21-012419 · doc4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,344

F1 · kind: Restricted stock units awarded to Reporting Person under Issuer's 2014 Incentive Plan. Units paid in shares of Common Stock upon the date the non-employee director ceases to be a director of the Company.

SEC source: 0001157523-20-000760 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,125

F1 · shares: Consists of restricted stock units issued under the Issuer's 2014 Independent Directors Equity Plan and representing an equal number of shares of Common Stock issuable upon vesting of such units.

SEC source: 0001209191-20-011001 · doc4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,964

F1 · kind: Restricted stock units awarded to Reporting Person under Issuer's 2014 Incentive Plan. Units paid in shares of Common Stock upon the date the non-employee director ceases to be a director of the Company.

SEC source: 0001157523-19-001257 · form4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,773

F1 · shares: Consists of restricted stock units issued under the Issuer's 2014 Independent Directors Equity Plan and representing an equal number of shares of Common Stock issuable upon vesting of such units.

SEC source: 0001209191-19-012200 · doc4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,220

F1 · kind: Restricted stock units awarded to Reporting Person under Issuer's 2014 Incentive Plan. Units paid in shares of Common Stock upon the date the non-employee director ceases to be a director of the Company.

SEC source: 0001567619-18-002237 · doc1.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,208

F1 · shares: Consists of restricted stock units issued under the Issuer's 2014 Independent Directors Equity Plan and representing an equal number of shares of Common Stock issuable upon vesting of such units.

SEC source: 0001209191-18-012198 · doc4.xml · nonDerivative · entry 1

Brock Amanda M · CIK 0001714868 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,000

F1 · kind: Restricted stock units awarded to Reporting Person under Issuer's 2014 Incentive Plan. Units paid in shares of Common Stock upon the date the non-employee director ceases to be a director of the Company.