DEVON ENERGY CORP/DE - 14 May 2026 Form 4 Insider Report for Fervo Energy Co (FRVO)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: FRVO
Reported as of: 14 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 May 2026, 16:30:13 UTC
Prior SEC filing: 12 May 2026
Next SEC filing: 24 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Marcus G. Bolinder, Secretary

Key filing fact

DEVON ENERGY CORP/DE filed Form 4 for Fervo Energy Co (FRVO) on 15 May 2026.

Key facts

This page summarizes DEVON ENERGY CORP/DE's Form 4 filing for Fervo Energy Co (FRVO).
8 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 15 May 2026, 16:30.

Change

Previous filing in this sequence was filed on 12 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001090012 Primary reporting owner

DEVON ENERGY CORP/DE

Relationship: Director, 10%+ Owner
Address: THREE MEMORIAL CITY PLAZA, 840 GESSNER ROAD, SUITE 1400, HOUSTON
Signature: /s/ Marcus G. Bolinder, Secretary
Signature date: 15 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FRVO transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +25,568,060
Change %
Price
Shares after: 25,568,060
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2

FRVO transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +3,429,061
Change %: +13%
Price
Shares after: 28,997,121
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2

FRVO transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +2,329,345
Change %: +8%
Price
Shares after: 31,326,466
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2

FRVO transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +4,401,830
Change %: +14%
Price
Shares after: 35,728,296
Date: 14 May 2026
Ownership: See footnote
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FRVO transaction Derivative

Series D-1 Preferred Stock

Conversion of derivative security

Transaction value
Shares: -35,540,812
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 25,568,060
Exercise price
Footnotes: F1, F2

FRVO transaction Derivative

Series D-2 Preferred Stock

Conversion of derivative security

Transaction value
Shares: -4,766,557
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 3,429,061
Exercise price
Footnotes: F1, F2

FRVO transaction Derivative

Series D-3 Preferred Stock

Conversion of derivative security

Transaction value
Shares: -3,237,900
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 2,329,345
Exercise price
Footnotes: F1, F2

FRVO transaction Derivative

Series E-1 Preferred Stock

Conversion of derivative security

Transaction value
Shares: -6,118,752
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 14 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 4,401,830
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

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.

Footnote F2

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.

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