144 0001577919 XXXXXXXX LIVE 0001697500 SOLARIS ENERGY INFRASTRUCTURE, INC. 001-38090 9651 KATY FREEWAY SUITE 300 HOUSTON TX 77024 (281)501-3070 Yorktown Energy Partners X, L.P. Affiliate Class A Morgan Stanley | Global Capital Markets

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2000000 149000000 58402338 05/06/2026 NYSE Class A 05/12/2017 Private Placement Issuer N 14678651 05/12/2017 Cash Y 05/08/2026 /s/ W. Howard Keenan, Jr.