SEI

SEC source: 0000950170-25-055870 · ownership.xml · nonDerivative · entry 1

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,459

F1 · price: The reported price in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $23.99 to $24.02 per share. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · balance_after: Includes 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

F3 · ownership.direct: On March 7, 2025, the reporting person filed a Form 4 (the "Original Form 4") with the SEC. On March 10, 2025, the reporting person filed with the SEC an amendment on Form 4/A (the "First Amendment") solely to correct an administrative error which misreported the purchases of a collective 4,000 shares of Class A common stock using the transaction code of "A," when in fact this was an open market purchase with transaction code of "P," however, the Original Form 4 also mistakenly reported that the reporting person's spouse indirectly held 100,459 shares of Class A common stock and the First Amendment then mistakenly reported that the reporting person's spouse indirectly held 102,459 shares of Class A common stock.

F4 · ownership.direct: (Continued from footnote 3) This second amendment on Form 4/A (this "Second Amendment") is being filed to correct the ownership in both the Original Form 4 and the First Amendment to show that the reporting person (i) directly holds 96,459 shares of Class A common stock following the reporting person's purchase of an additional 2,000 shares of Class A common stock in an open market purchase on March 6, 2025 and (ii) indirectly owns 4,000 shares of Class A common stock following the purchase of an additional 2,000 shares of Class A common stock in an open market purchase on March 6, 2025 by the reporting person's spouse.

SEC source: 0000950170-25-055866 · ownership.xml · nonDerivative · entry 1

BURKE JAMES R · CIK 0001227489 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 800

F1 · security: This second amendment on Form 4/A (this "Second Amendment") is being filed to amend the original Form 4, filed with the U.S. Securities and Exchange Commission (the "SEC") on March 7, 2025 (the "Original Form 4"), as amended by a Form 4/A, filed with the SEC on March 10, 2025 (the "First Amendment"). The First Amendment was filed for the purposes of correcting an administrative error which misreported the purchase of 800 shares of Class A common stock using a transaction code of "A," when in fact this was an open market purchase with a transaction code of "P."

F2 · security: (Continued from footnote 1) This Second Amendment is being filed solely to correct an administrative error which misreported in each of Footnote 1 to the Original Form 4 and Footnote 2 to the First Amendment that the amount of beneficial securities that the reporting person owned following the reported transactions included 15,687 shares of Class A common stock that are subject to previously granted Restricted Stock Awards that remain subject to vesting, when in fact the amount of such securities included was 12,372.

SEC source: 0001415889-25-006638 · form4-03042025_100356.xml · nonDerivative · entry 2

Zartler William A · CIK 0001520378 · Director · CHAIRMAN AND CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,009,227

F2 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards.

F3 · balance_after: Includes 450,381 shares of Class A common stock from previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-25-006638 · form4-03042025_100356.xml · nonDerivative · entry 1

Zartler William A · CIK 0001520378 · Director · CHAIRMAN AND CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,090,341

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

SEC source: 0001415889-25-006650 · form4-03042025_100326.xml · nonDerivative · entry 2

Wirtz Christopher P. · CIK 0001979735 · CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,183

F2 · balance_after: Includes 27,088 shares of Class A common stock from previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-25-006650 · form4-03042025_100326.xml · nonDerivative · entry 1

Wirtz Christopher P. · CIK 0001979735 · CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,485

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

SEC source: 0001415889-25-006648 · form4-03042025_100352.xml · nonDerivative · entry 2

Durrett Cynthia M. · CIK 0001705383 · Director · CHIEF ADMINISTRATIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 178,163

F2 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards.

F3 · balance_after: Includes 86,929 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-25-006648 · form4-03042025_100352.xml · nonDerivative · entry 1

Durrett Cynthia M. · CIK 0001705383 · Director · CHIEF ADMINISTRATIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 194,345

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.

SEC source: 0001415889-25-006646 · form4-03042025_100352.xml · nonDerivative · entry 2

Powell Christopher M · CIK 0001710164 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,365

F2 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards.

F3 · balance_after: Includes 85,467 shares of Class A common stock from previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-25-006646 · form4-03042025_100352.xml · nonDerivative · entry 1

Powell Christopher M · CIK 0001710164 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 159,708

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.

SEC source: 0001415889-25-006644 · form4-03042025_100340.xml · nonDerivative · entry 1

Price Kelly L. · CIK 0001705397 · FORMER CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 271,519

F1 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards.

F2 · balance_after: Includes 67,121 shares of Class A common stock from previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-25-006641 · form4-03042025_100317.xml · nonDerivative · entry 2

Ramachandran Kyle S. · CIK 0001705386 · PRESIDENT AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 368,338

F2 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards.

F3 · balance_after: Includes 158,808 shares of Class A common stock from previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-25-006641 · form4-03042025_100317.xml · nonDerivative · entry 1

Ramachandran Kyle S. · CIK 0001705386 · PRESIDENT AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 401,615

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.

SEC source: 0001415889-25-006020 · form4-02282025_090231.xml · nonDerivative · entry 2

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 96,459

SEC source: 0001415889-25-007597 · form4a-03102025_110346.xml · nonDerivative · entry 2

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 96,459

F1 · kind: The original Form 4, filed on February 28, 2025, is being amended by this Form 4 amendment solely to correct an administrative error, which misreported the purchase of 2,000 shares of Class A Common Stock using transaction code of "A" when in fact this was an open market purchase with transaction code of "P".

F2 · balance_after: Includes 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0000950170-25-055869 · ownership.xml · nonDerivative · entry 2

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 2,000

F2 · ownership.direct: On February 28, 2025, the reporting person filed a Form 4 (the "Original Form 4") with the U.S. Securities and Exchange Commission (the "SEC"). On March 10, 2025, the reporting person filed with the SEC an amendment on Form 4/A (the "First Amendment") solely to correct an administrative error which misreported the purchases of a collective 4,000 shares of Class A common stock using the transaction code of "A" when in fact this was an open market purchase with transaction code of "P," however, each of the Original Form 4 and the First Amendment also mistakenly reported that the reporting person's spouse indirectly held 96,459 shares of Class A common stock.

F3 · ownership.direct: (Continued from footnote 2) This second amendment on Form 4/A (this "Second Amendment") is being filed to correct the ownership in both the Original Form 4 and First Amendment to show that the reporting person (i) directly holds 94,459 shares of Class A common stock following the reporting person's purchase of 2,000 shares of Class A common stock in an open market purchase on February 27, 2025 and (ii) indirectly owns 2,000 shares of Class A common stock following the purchase of 2,000 shares of Class A common stock in an open market purchase on February 28, 2025 by the reporting person's spouse.

SEC source: 0001415889-25-006020 · form4-02282025_090231.xml · nonDerivative · entry 1

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,459

SEC source: 0001415889-25-007597 · form4a-03102025_110346.xml · nonDerivative · entry 1

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,459

F1 · kind: The original Form 4, filed on February 28, 2025, is being amended by this Form 4 amendment solely to correct an administrative error, which misreported the purchase of 2,000 shares of Class A Common Stock using transaction code of "A" when in fact this was an open market purchase with transaction code of "P".

F2 · balance_after: Includes 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0000950170-25-055869 · ownership.xml · nonDerivative · entry 1

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,459

F1 · balance_after: Includes 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

F2 · ownership.direct: On February 28, 2025, the reporting person filed a Form 4 (the "Original Form 4") with the U.S. Securities and Exchange Commission (the "SEC"). On March 10, 2025, the reporting person filed with the SEC an amendment on Form 4/A (the "First Amendment") solely to correct an administrative error which misreported the purchases of a collective 4,000 shares of Class A common stock using the transaction code of "A" when in fact this was an open market purchase with transaction code of "P," however, each of the Original Form 4 and the First Amendment also mistakenly reported that the reporting person's spouse indirectly held 96,459 shares of Class A common stock.

F3 · ownership.direct: (Continued from footnote 2) This second amendment on Form 4/A (this "Second Amendment") is being filed to correct the ownership in both the Original Form 4 and First Amendment to show that the reporting person (i) directly holds 94,459 shares of Class A common stock following the reporting person's purchase of 2,000 shares of Class A common stock in an open market purchase on February 27, 2025 and (ii) indirectly owns 2,000 shares of Class A common stock following the purchase of 2,000 shares of Class A common stock in an open market purchase on February 28, 2025 by the reporting person's spouse.

SEC source: 0001415889-25-002743 · form4-02032025_090223.xml · nonDerivative · entry 1

YZAGUIRRE MARIO MAX · CIK 0001198626 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,361

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.

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: 0000950170-24-137918 · ownership.xml · derivative · entry 4

Yorktown Energy Partners X, L.P. · CIK 0001577919 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

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.

F4 · 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.

F4 · 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.

F4 · 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.

F4 · 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.

SEC source: 0000950170-24-137918 · ownership.xml · nonDerivative · entry 3

Yorktown Energy Partners X, L.P. · CIK 0001577919 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

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.

SEC source: 0000950170-24-137918 · ownership.xml · nonDerivative · entry 2

Yorktown Energy Partners X, L.P. · CIK 0001577919 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

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.

SEC source: 0000950170-24-137918 · ownership.xml · nonDerivative · entry 1

Yorktown Energy Partners X, L.P. · CIK 0001577919 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

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.

SEC source: 0001415889-24-026618 · form4-11122024_091148.xml · nonDerivative · entry 1

Walker Ray N JR · CIK 0001483960 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,905

F1 · balance_after: Includes 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-026619 · form4-11122024_091135.xml · nonDerivative · entry 1

BURKE JAMES R · CIK 0001227489 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,277

F1 · price: The reported price in Column 4 is a weighted average purchase price. These shares were sold in multiple transactions at prices ranging from $16.60 to $16.82 per share. The Reporting Person undertakes to provide 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.

F2 · balance_after: Includes 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-022299 · form4-08272024_040805.xml · nonDerivative · entry 1

PARKER F GARDNER · CIK 0001020949 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,812

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 13,225 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-022298 · form4-08272024_040801.xml · nonDerivative · entry 1

Giesinger Edgar R. JR. · CIK 0001658831 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,904

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 13,225 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-022305 · form4-08272024_040819.xml · nonDerivative · entry 1

Walker Ray N JR · CIK 0001483960 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,416

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 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-022301 · form4-08272024_040811.xml · nonDerivative · entry 1

TEAGUE AJ · CIK 0001183251 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,459

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 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-022303 · form4-08272024_040817.xml · nonDerivative · entry 1

BURKE JAMES R · CIK 0001227489 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,277

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 12,372 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

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: 0001415889-24-022300 · form4-08272024_040807.xml · nonDerivative · entry 1

Argo Laurie H · CIK 0001622230 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,064

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 13,225 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-015318 · form4-06042024_040601.xml · nonDerivative · entry 1

Wirtz Christopher P. · CIK 0001979735 · CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,801

F1 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards.

F2 · balance_after: Includes 26,758 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-008481 · form4-03192024_040301.xml · nonDerivative · entry 1

Powell Christopher M · CIK 0001710164 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,202

F1 · balance_after: Includes 105,583 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006850 · form4-03052024_110354.xml · nonDerivative · entry 2

Zartler William A · CIK 0001520378 · Director · CHAIRMAN AND CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 864,963

F3 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

F4 · balance_after: Includes 436,717 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006850 · form4-03052024_110354.xml · nonDerivative · entry 1

Zartler William A · CIK 0001520378 · Director · CHAIRMAN AND CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 917,551

F1 · shares: Includes 262,500 shares from Restricted Stock Award granted pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal annual installments on the first three anniversaries of the grant date.

F2 · shares: Includes 4,911 shares vested from Performance-Based Restricted Stock Unit (PSU) Agreement pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The PSUs, which were originally granted on March 1, 2023, vested based on the issuer's level of achievement with respect to relative total stockholder return during the applicable performance period (which began on January 1, 2023 and ended on December 31, 2023).

SEC source: 0001415889-24-006867 · form4-03052024_110307.xml · nonDerivative · entry 1

Wirtz Christopher P. · CIK 0001979735 · CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,103

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

F2 · balance_after: Includes 32,103 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006863 · form4-03052024_110325.xml · nonDerivative · entry 2

Durrett Cynthia M. · CIK 0001705383 · Director · CHIEF ADMINISTRATIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 159,903

F3 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

F4 · balance_after: Includes 101,701 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006863 · form4-03052024_110325.xml · nonDerivative · entry 1

Durrett Cynthia M. · CIK 0001705383 · Director · CHIEF ADMINISTRATIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,945

F1 · shares: Includes 57,523 shares from Restricted Stock Award granted pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal installments on the first three anniversaries of the grant date.

F2 · shares: Includes 1,388 shares vested from Performance-Based Restricted Stock Unit (PSU) Agreement pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The PSUs, which were originally granted on March 1, 2023, vested based on the issuer's level of achievement with respect to relative total stockholder return during the applicable performance period (which began on January 1, 2023 and ended on December 31, 2023).

SEC source: 0001415889-24-006857 · form4-03052024_110342.xml · nonDerivative · entry 2

Powell Christopher M · CIK 0001710164 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,702

F3 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

F4 · balance_after: Includes 105,583 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006857 · form4-03052024_110342.xml · nonDerivative · entry 1

Powell Christopher M · CIK 0001710164 · CHIEF LEGAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,009

F1 · shares: Includes 61,827 shares from Restricted Stock Award granted pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal installments on the first three anniversaries of the grant date.

F2 · shares: Includes 1,447 shares vested from Performance-Based Restricted Stock Unit (PSU) Agreement pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The PSUs, which were originally granted on March 1, 2023, vested based on the issuer's level of achievement with respect to relative total stockholder return during the applicable performance period (which began on January 1, 2023 and ended on December 31, 2023).

SEC source: 0001415889-24-006854 · form4-03052024_110319.xml · nonDerivative · entry 2

Price Kelly L. · CIK 0001705397 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 294,183

F3 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

F4 · balance_after: Includes 133,078 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006854 · form4-03052024_110319.xml · nonDerivative · entry 1

Price Kelly L. · CIK 0001705397 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 308,091

F1 · shares: Includes 73,833 shares from Restricted Stock Award granted pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal installments on the first three anniversaries of the grant date.

F2 · shares: Includes 1,758 shares vested from Performance-Based Restricted Stock Unit (PSU) Agreement pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The PSUs, which were originally granted on March 1, 2023, vested based on the issuer's level of achievement with respect to relative total stockholder return during the applicable performance period (which began on January 1, 2023 and ended on December 31, 2023).

SEC source: 0001415889-24-006852 · form4-03052024_110359.xml · nonDerivative · entry 2

Ramachandran Kyle S. · CIK 0001705386 · PRESIDENT AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 336,497

F3 · shares: Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

F4 · balance_after: Includes 184,953 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

SEC source: 0001415889-24-006852 · form4-03052024_110359.xml · nonDerivative · entry 1

Ramachandran Kyle S. · CIK 0001705386 · PRESIDENT AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 355,608

F1 · shares: Includes 104,313 shares from Restricted Stock Award granted pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal installments on the first three anniversaries of the grant date.

F2 · shares: Includes 2,371 shares vested from Performance-Based Restricted Stock Unit (PSU) Agreement pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The PSUs, which were originally granted on March 1, 2023, vested based on the issuer's level of achievement with respect to relative total stockholder return during the applicable performance period (which began on January 1, 2023 and ended on December 31, 2023).