EX-99.1

Exhibit 99.1

Joint Filer Information

Signatures and Joint Filer Information


Name of Joint Filer:	American Securities LLC
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


AMERICAN SECURITIES LLC

/s/ Michael G. Fisch
Name:	Michael G. Fisch
Title:	Chief Executive Officer

Dated: August 21, 2026

1

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP Endeavor Investco LP
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP Endeavor Investco LP

/s/ Eric L. Schondorf
Name:	Eric L. Schondorf
Title:	Vice President and Secretary

Dated: August 21, 2026

2

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP SOLV Aggregator L.P.
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP SOLV Aggregator L.P.

/s/ Eric L. Schondorf
Name:	Eric L. Schondorf
Title:	Vice President and Secretary

Dated: August 21, 2026

3

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP VIII Alternative Investments Solstice, L.P.
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP VIII Alternative Investments Solstice, L.P. BY: American Securities Associates VIII, LLC, its general partner

/s/ Michael G. Fisch
Name:	Michael G. Fisch
Title:	President

Dated: August 21, 2026

4

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	American Securities Partners VIII(B), L.P.
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


American Securities Partners VIII(B), L.P. By: American Securities Associates VIII, LLC, its general partner

/s/ Michael G. Fisch
Name:	Michael G. Fisch
Title:	President

Dated: August 21, 2026

5

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP VIII Alternative Investments L.P.
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP VIII Alternative Investments L.P. By: American Securities Associates VIII, LLC, its general partner

/s/ Michael G. Fisch
Name:	Michael G. Fisch
Title:	President

Dated: August 21, 2026

6

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	AS/ASP VIII Co-Investor LLC
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


AS/ASP VIII Co-Investor LLC By: ASP Manager Corp., its MANAGER

/s/ Eric L. Schondorf
Name:	Eric L. Schondorf
Title:	Vice President and Secretary

Dated: August 21, 2026

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Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	American Securities Associates VIII, LLC
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


American Securities Associates VIII, LLC

/s/ Michael G. Fisch
Name:	Michael G. Fisch
Title:	President

Dated: August 21, 2026

8

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP VIII SOLV Holdings LP
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP VIII SOLV Holdings LP By: ASP Manager Corp., its GENERAL PARTNER

/s/ Eric L. Schondorf
Name:	Eric L. Schondorf
Title:	Vice President and Secretary

Dated: August 21, 2026

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Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP VIII CSE Holdings LP
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP VIII CSE Holdings LP By: ASP Manager Corp., its GENERAL PARTNER

/s/ Eric L. Schondorf
Name:	Eric L. Schondorf
Title:	Vice President and Secretary

Dated: August 21, 2026

10

Signatures and Joint Filer Information
(continued)


Name of Joint Filer:	ASP Manager Corp.
Address of Joint Filer:	590 Madison Avenue, 38th Floor New York NY 10022
Relationship of Joint Filer to Issuer:	10% Owner
Issuer Name and Ticker or Trading Symbol:	SOLV Energy, Inc. [MWH]
Date of Earliest Transaction Required to be Reported (Month/Day/Year):	08/19/2026
Designated Filer:	American Securities LLC

Signature:


ASP Manager Corp.

/s/ Eric L. Schondorf
Name:	Eric L. Schondorf
Title:	Vice President and Secretary

Dated: August 21, 2026

11