CTOS

SEC source: 0001213900-25-028041 · ownership.xml · derivative · entry 3

EIN MARK · CIK 0001246840 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 22,218 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F2 · derivative.exercise_date: The restricted stock units vested in full on March 31, 2025.

F2 · derivative.expiration_date: The restricted stock units vested in full on March 31, 2025.

SEC source: 0001213900-25-028041 · ownership.xml · nonDerivative · entry 1

EIN MARK · CIK 0001246840 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,585,707

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 · price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001213900-25-028042 · ownership.xml · derivative · entry 2

BADER PAUL · CIK 0001776138 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 22,218 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F2 · derivative.exercise_date: The restricted stock units vested in full on March 31, 2025.

F2 · derivative.expiration_date: The restricted stock units vested in full on March 31, 2025.

SEC source: 0001213900-25-028042 · ownership.xml · nonDerivative · entry 1

BADER PAUL · CIK 0001776138 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,804

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 · price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001104659-25-008749 · tm254247-4_4seq1.xml · nonDerivative · entry 1

PE One Source Holdings, LLC · CIK 0001855018 · 10% owner

Platinum Equity Partners V, L.P. · CIK 0001854950 · 10% owner

Platinum Equity Partners V, LLC · CIK 0001854827 · 10% owner

Platinum Equity Investment Holdings V, LLC · CIK 0001854932 · 10% owner

Platinum Equity Investment Holdings V Manager, LLC · CIK 0001854967 · 10% owner

Platinum Equity InvestCo, L.P. · CIK 0001756331 · 10% owner

Platinum InvestCo (Cayman), LLC · CIK 0001766567 · 10% owner

Platinum Equity Investment Holdings IC (Cayman), LLC · CIK 0001756330 · 10% owner

Platinum Equity Investment Holdings, LLC · CIK 0001634372 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 156,743,635

F1 · ownership.nature: PE One Source Holdings, LLC ("PE One Source") is the record holder of the securities reported herein. Tom Gores is the manager of Platinum Equity, LLC, which is the sole member of Platinum Equity Investment Holdings, LLC, which is the sole member of Platinum Equity Investment Holdings IC (Cayman), LLC, which is the general partner of Platinum Equity InvestCo, L.P., which is the sole member of Platinum Equity Investment Holdings V, LLC, which is the sole member of Platinum Equity Partners V, LLC, which is the general partner of Platinum Equity Partners V, L.P., which is the general partner of Platinum Equity Capital Partners V, L.P., which holds a majority of the outstanding equity of PE One Source.

F2 · ownership.nature: Additionally, Platinum Equity, LLC is also the sole member of Platinum Equity Investment Holdings V Manager, LLC, which is the sole manager of Platinum Equity Investment Holdings V, LLC. Platinum Equity, LLC and Tom Gores together hold a controlling interest in Platinum InvestCo (Cayman), LLC, which holds a controlling interest in Platinum Equity InvestCo, L.P. By virtue of these relationships, each of these entities and Mr. Gores may be deemed to share beneficial ownership of the securities held of record by PE One Source. Each of these entities and Mr. Gores disclaim any such beneficial ownership except to the extent of their pecuniary interests therein.

SEC source: 0001104659-25-008748 · tm254247-3_4seq1.xml · nonDerivative · entry 1

PLATINUM EQUITY, LLC · CIK 0001228754 · 10% owner

Gores Tom · CIK 0001471783 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 156,743,635

F1 · ownership.nature: PE One Source Holdings, LLC ("PE One Source") is the record holder of the securities reported herein. Tom Gores is the manager of Platinum Equity, LLC, which is the sole member of Platinum Equity Investment Holdings, LLC, which is the sole member of Platinum Equity Investment Holdings IC (Cayman), LLC, which is the general partner of Platinum Equity InvestCo, L.P., which is the sole member of Platinum Equity Investment Holdings V, LLC, which is the sole member of Platinum Equity Partners V, LLC, which is the general partner of Platinum Equity Partners V, L.P., which is the general partner of Platinum Equity Capital Partners V, L.P., which holds a majority of the outstanding equity of PE One Source.

F2 · ownership.nature: Additionally, Platinum Equity, LLC is also the sole member of Platinum Equity Investment Holdings V Manager, LLC, which is the sole manager of Platinum Equity Investment Holdings V, LLC. Platinum Equity, LLC and Tom Gores together hold a controlling interest in Platinum InvestCo (Cayman), LLC, which holds a controlling interest in Platinum Equity InvestCo, L.P. By virtue of these relationships, each of these entities and Mr. Gores may be deemed to share beneficial ownership of the securities held of record by PE One Source. Each of these entities and Mr. Gores disclaim any such beneficial ownership except to the extent of their pecuniary interests therein.

SEC source: 0001213900-25-000861 · ownership.xml · derivative · entry 4

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,033

Underlying: Common Stock · 14,666 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000861 · ownership.xml · derivative · entry 3

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,033

Underlying: Common Stock · 14,666 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000861 · ownership.xml · nonDerivative · entry 2

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 499,431

F2 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000861 · ownership.xml · nonDerivative · entry 1

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 525,919

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

F1 · shares: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001213900-25-000859 · ownership.xml · derivative · entry 4

Rich Thomas R. · CIK 0001854514 · President - Rentals

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,175

Underlying: Common Stock · 9,025 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000859 · ownership.xml · derivative · entry 3

Rich Thomas R. · CIK 0001854514 · President - Rentals

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,175

Underlying: Common Stock · 9,025 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000859 · ownership.xml · nonDerivative · entry 2

Rich Thomas R. · CIK 0001854514 · President - Rentals

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 231,942

F2 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000859 · ownership.xml · nonDerivative · entry 1

Rich Thomas R. · CIK 0001854514 · President - Rentals

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 242,828

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

F1 · shares: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001213900-25-000854 · ownership.xml · derivative · entry 5

Ross Joe P. · CIK 0001852519 · President - Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,175

Underlying: Common Stock · 9,025 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000854 · ownership.xml · derivative · entry 4

Ross Joe P. · CIK 0001852519 · President - Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,175

Underlying: Common Stock · 9,025 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000854 · ownership.xml · nonDerivative · entry 2

Ross Joe P. · CIK 0001852519 · President - Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 256,998

F2 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000854 · ownership.xml · nonDerivative · entry 1

Ross Joe P. · CIK 0001852519 · President - Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 267,884

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

F1 · shares: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001213900-25-000857 · ownership.xml · derivative · entry 5

Ross Fredrick M. Jr. · CIK 0001851369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,806

Underlying: Common Stock · 15,794 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000857 · ownership.xml · derivative · entry 4

Ross Fredrick M. Jr. · CIK 0001851369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,806

Underlying: Common Stock · 15,794 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000857 · ownership.xml · nonDerivative · entry 2

Ross Fredrick M. Jr. · CIK 0001851369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 282,575

F2 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000857 · ownership.xml · nonDerivative · entry 1

Ross Fredrick M. Jr. · CIK 0001851369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 311,101

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

F1 · shares: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001213900-25-000868 · ownership.xml · nonDerivative · entry 1

JOLAS PAUL M · CIK 0001245559 · EVP, Gen. Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,929

F1 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000863 · ownership.xml · nonDerivative · entry 1

Eperjesy Christopher J · CIK 0001225634 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,615

F1 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000871 · ownership.xml · derivative · entry 4

BARRETT RAYMOND TODD · CIK 0001785100 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,261

Underlying: Common Stock · 678 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000871 · ownership.xml · derivative · entry 3

BARRETT RAYMOND TODD · CIK 0001785100 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,279

Underlying: Common Stock · 1,580 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

F3 · derivative.expiration_date: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock. The performance stock units will vest based on the attainment of certain performance conditions.

SEC source: 0001213900-25-000871 · ownership.xml · nonDerivative · entry 2

BARRETT RAYMOND TODD · CIK 0001785100 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,237

F2 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's performance stock units.

SEC source: 0001213900-25-000871 · ownership.xml · nonDerivative · entry 1

BARRETT RAYMOND TODD · CIK 0001785100 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,722

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

F1 · shares: Each performance stock unit represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001493152-24-035539 · ownership.xml · nonDerivative · entry 1

NESCO Holdings, LP · CIK 0001779899 · 10% owner

NESCO Holdings GP, LLC · CIK 0001779905 · 10% owner

ECP Cardinal Holdings, LP · CIK 0001897243 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 23,384,879

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.42 to $3.72. The reporting persons undertake to provide 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 · ownership.nature: Following the transactions reported herein, ECP Cardinal Holdings, LP and NESCO Holdings, LP are the record holders of 4,088,426 and 19,296,453 shares of Common Stock, respectively.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert (together, the "ECP Managers"), all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of the relationships described below, each of the ECP Managers may be deemed to share beneficial ownership of the securities described herein. Each individual disclaims beneficial ownership of such securities.

F4 · ownership.nature: ECP ControlCo, LLC is the managing member of Energy Capital Partners III, LLC, which is the general partner of (i) Energy Capital Partners GP III, LP, which is the general partner of each of Energy Capital Partners III, LP, Energy Capital Partners III-A, LP, Energy Capital Partners III-B, LP, Energy Capital Partners III-C, LP, and Energy Capital Partners III-D, LP, which are the sole members of ECP Starlight Public GP, LLC, which is the general partner of ECP Starlight Guarantor (Public), LP, and (ii) Energy Capital Partners GP III Co-Investment (NESCO), LLC, which is the general partner of Energy Capital Partners III (NESCO Co-Invest), LP.

F5 · ownership.nature: ECP Starlight Guarantor (Public), LP and Energy Capital Partners III (NESCO Co-Invest), LP are the sole members of NESCO Holdings GP, LLC, which is the general partner of each of ECP Cardinal Holdings, LP and NESCO Holdings, LP. Each of the entities described in footnotes 4 and 5 may be deemed to share beneficial ownership of the securities held of record by ECP Cardinal Holdings, LP and NESCO Holdings, LP.

SEC source: 0001493152-24-035540 · ownership.xml · nonDerivative · entry 1

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

ENERGY CAPITAL PARTNERS III, LLC · CIK 0001621292 · 10% owner

Energy Capital Partners GP III, LP · CIK 0001697506 · 10% owner

ENERGY CAPITAL PARTNERS III, LP · CIK 0001594546 · 10% owner

ENERGY CAPITAL PARTNERS III-A, LP · CIK 0001594547 · 10% owner

ENERGY CAPITAL PARTNERS III-B, LP · CIK 0001594548 · 10% owner

ENERGY CAPITAL PARTNERS III-C, LP · CIK 0001594549 · 10% owner

ENERGY CAPITAL PARTNERS III-D, LP · CIK 0001594550 · 10% owner

ENERGY CAPITAL PARTNERS GP III CO-INVESTMENT (NESCO), LLC · CIK 0001780268 · 10% owner

Energy Capital Partners III (NESCO Co-Invest), LP · CIK 0001604735 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 23,384,879

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.42 to $3.72. The reporting persons undertake to provide 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 · ownership.nature: Following the transactions reported herein, ECP Cardinal Holdings, LP and NESCO Holdings, LP are the record holders of 4,088,426 and 19,296,453 shares of Common Stock, respectively.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert (together, the "ECP Managers"), all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of the relationships described below, each of the ECP Managers may be deemed to share beneficial ownership of the securities described herein. Each individual disclaims beneficial ownership of such securities.

F4 · ownership.nature: ECP ControlCo, LLC is the managing member of Energy Capital Partners III, LLC, which is the general partner of (i) Energy Capital Partners GP III, LP, which is the general partner of each of Energy Capital Partners III, LP, Energy Capital Partners III-A, LP, Energy Capital Partners III-B, LP, Energy Capital Partners III-C, LP, and Energy Capital Partners III-D, LP, which are the sole members of ECP Starlight Public GP, LLC, which is the general partner of ECP Starlight Guarantor (Public), LP, and (ii) Energy Capital Partners GP III Co-Investment (NESCO), LLC, which is the general partner of Energy Capital Partners III (NESCO Co-Invest), LP.

F5 · ownership.nature: ECP Starlight Guarantor (Public), LP and Energy Capital Partners III (NESCO Co-Invest), LP are the sole members of NESCO Holdings GP, LLC, which is the general partner of each of ECP Cardinal Holdings, LP and NESCO Holdings, LP. Each of the entities described in footnotes 4 and 5 may be deemed to share beneficial ownership of the securities held of record by ECP Cardinal Holdings, LP and NESCO Holdings, LP.

SEC source: 0001493152-24-034395 · ownership.xml · nonDerivative · entry 1

Energy Capital Partners Management, LP · CIK 0001815150 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.165 to $4.185. The reporting person undertakes to provide 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 · ownership.nature: These securities are beneficially owned by Energy Capital Partners Management, LP ("ECP Management"). ECP Management is controlled by its business unit committee, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Murray Karp, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP Management.

SEC source: 0001213900-24-067253 · ownership.xml · nonDerivative · entry 1

Ross Joe P. · CIK 0001852519 · President - Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 249,834

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $3.95 to $4.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

SEC source: 0001213900-24-066151 · ownership.xml · nonDerivative · entry 1

Rich Thomas R. · CIK 0001854514 · President - Rentals

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 224,778

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $3.81 to $3.86, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

SEC source: 0001213900-24-065287 · ownership.xml · nonDerivative · entry 1

EIN MARK · CIK 0001246840 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Capitol Acquisition Management IV, LLC

Disclosed balance after: 3,670,276

F1 · kind: Represents the forfeiture for no consideration of Sponsor Earn-Out Shares pursuant to the terms of that certain Second Amended and Restated Stockholders' Agreement, dated as of April 13, 2023, among the Issuer and the stockholders identified therein.

SEC source: 0001213900-24-052892 · ownership.xml · nonDerivative · entry 1

Heinberg Marshall · CIK 0001481338 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 303,856

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.34 to $4.36, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

SEC source: 0001213900-24-041394 · ownership.xml · nonDerivative · entry 1

NELSON GEORGIA R · CIK 0001141392 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,586

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.07 to $4.14, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

SEC source: 0001213900-24-041537 · ownership.xml · nonDerivative · entry 1

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 496,587

SEC source: 0001213900-24-040993 · ownership.xml · nonDerivative · entry 1

Heinberg Marshall · CIK 0001481338 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 293,856

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.88 to $4.13, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

SEC source: 0001213900-24-040994 · ownership.xml · nonDerivative · entry 1

Eperjesy Christopher J · CIK 0001225634 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 176,962

SEC source: 0001213900-24-040995 · ownership.xml · nonDerivative · entry 1

BARRETT RAYMOND TODD · CIK 0001785100 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,464

SEC source: 0001213900-24-029521 · ownership.xml · derivative · entry 3

NELSON GEORGIA R · CIK 0001141392 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,218

Underlying: Common Stock · 22,218 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F3 · derivative.expiration_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

SEC source: 0001213900-24-029526 · ownership.xml · derivative · entry 3

Jackson Mary M. · CIK 0001856953 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,218

Underlying: Common Stock · 22,218 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F3 · derivative.expiration_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

SEC source: 0001213900-24-029525 · ownership.xml · derivative · entry 4

ECP ControlCo, LLC · CIK 0001707921 · Director · 10% owner

ECP Management GP, LLC · CIK 0001815147 · Director · 10% owner

Energy Capital Partners Management, LP · CIK 0001815150 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 22,218

Underlying: Common Stock · 22,218 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F6 · derivative.exercise_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F6 · derivative.expiration_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F2 · ownership.nature: Represents securities held directly by Energy Capital Partners Management, LP ("ECP Management"). ECP Management GP, LLC is the general partner of ECP Management and may be deemed to share beneficial ownership of the securities held by ECP Management. ECP ControlCo, LLC ("ECP ControlCo") is the sole member of ECP Management GP, LLC. As a result, ECP ControlCo may be deemed to share beneficial ownership of the securities beneficially owned by ECP Management GP, LLC. The managing members of ECP ControlCo are Douglas Kimmelman, Andrew Singer, Peter Labbat, Tyler Reeder and Rahman D'Argenio all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo. Each such individual disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

SEC source: 0001213900-24-029520 · ownership.xml · derivative · entry 4

Heinberg Marshall · CIK 0001481338 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,993

Underlying: Common Stock · 39,993 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F3 · derivative.expiration_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

SEC source: 0001213900-24-029524 · ownership.xml · derivative · entry 4

EIN MARK · CIK 0001246840 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,218

Underlying: Common Stock · 22,218 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F3 · derivative.expiration_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

SEC source: 0001213900-24-029523 · ownership.xml · derivative · entry 3

BADER PAUL · CIK 0001776138 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,218

Underlying: Common Stock · 22,218 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

F3 · derivative.expiration_date: The restricted stock units will vest on March 31, 2025 and have no expiration date.

SEC source: 0001213900-24-029858 · ownership.xml · derivative · entry 4

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 243,750

Underlying: Common Stock · 81,250 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F4 · derivative.exercise_date: The restricted stock units vest in four equal annual installments beginning on April 1, 2024.

F4 · derivative.expiration_date: The restricted stock units vest in four equal annual installments beginning on April 1, 2024.

SEC source: 0001213900-24-029858 · ownership.xml · derivative · entry 3

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,250

Underlying: Common Stock · 81,250 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: The restricted stock units vest in four equal annual installments beginning on April 1, 2022.

F3 · derivative.expiration_date: The restricted stock units vest in four equal annual installments beginning on April 1, 2022.

SEC source: 0001213900-24-029858 · ownership.xml · nonDerivative · entry 2

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 486,587

F2 · shares: Shares withheld to satisfy tax obligations arising out of vesting of the Reporting Person's restricted stock units.

SEC source: 0001213900-24-029858 · ownership.xml · nonDerivative · entry 1

McMonagle Ryan · CIK 0001851380 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 558,658

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

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.