X0609 4 2026-05-14 0001853868 Fervo Energy Co FRVO 0001090012 DEVON ENERGY CORP/DE false THREE MEMORIAL CITY PLAZA 840 GESSNER ROAD, SUITE 1400 HOUSTON TX 77024 true false true false false Class A Common Stock 2026-05-14 4 C false 25568060 A 25568060 I See footnote Class A Common Stock 2026-05-14 4 C false 3429061 A 28997121 I See footnote Class A Common Stock 2026-05-14 4 C false 2329345 A 31326466 I See footnote Class A Common Stock 2026-05-14 4 C false 4401830 A 35728296 I See footnote Series D-1 Preferred Stock 2026-05-14 4 C false 35540812 0 D Class A Common Stock 25568060 0 I See footnote Series D-2 Preferred Stock 2026-05-14 4 C false 4766557 0 D Class A Common Stock 3429061 0 I See footnote Series D-3 Preferred Stock 2026-05-14 4 C false 3237900 0 D Class A Common Stock 2329345 0 I See footnote Series E-1 Preferred Stock 2026-05-14 4 C false 6118752 0 D Class A Common Stock 4401830 0 I See footnote Devon Technology Ventures Holdings, L.L.C., a wholly-owned subsidiary of Devon Energy Corporation, is the record holder of the securities listed in this Form 4. Upon the closing of the Issuer's initial public offering, each share of Series D-1 Preferred Stock, Series D-2 Preferred Stock, Series D-3 Preferred Stock and Series E-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into 0.7194 shares of the Issuer's Class A common stock, par value $0.0001 per share (the "Class A Common Stock"). The shares of Preferred Stock had no expiration date. /s/ Marcus G. Bolinder, Secretary 2026-05-15