David C. Unger - 31 Mar 2026 Form 4 Insider Report for OPAL Fuels Inc. (OPAL)

Reporting relationship: Executive Vice President
Issuer ticker: OPAL
Reported as of: 31 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Apr 2026, 16:41:28 UTC
Prior SEC filing: 10 Apr 2025
Source filing: View source filing
Reporting owner signature: /s/ John Coghlin as Attorney-in-Fact

Key filing fact

David C. Unger filed Form 4 for OPAL Fuels Inc. (OPAL) on 02 Apr 2026.

Key facts

This page summarizes David C. Unger's Form 4 filing for OPAL Fuels Inc. (OPAL).
14 reported transactions and 6 derivative rows are listed below.
Accepted by SEC: 02 Apr 2026, 16:41.

Change

Previous filing in this sequence was filed on 10 Apr 2025.
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 0001932698 Primary reporting owner

Unger David C

Relationship: Executive Vice President
Address: ONE NORTH LEXINGTON AVE, 14TH FLOOR, WHITE PLAINS
Signature: /s/ John Coghlin as Attorney-in-Fact
Signature date: 02 Apr 2026

Reported non-derivative transactions

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

OPAL transaction

Class A common stock

Options Exercise

Transaction value
Shares: +80,703
Change %: +65%
Price
Shares after: 204,679
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F1

OPAL transaction

Class A common stock

Tax liability

Transaction value
Shares: -29,093
Change %: -14%
Price: $2.52^*
Shares after: 175,586
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F2

OPAL transaction

Class A common stock

Options Exercise

Transaction value
Shares: +23,522
Change %: +13%
Price
Shares after: 199,108
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F1

OPAL transaction

Class A common stock

Tax liability

Transaction value
Shares: -8,479
Change %: -4.3%
Price: $2.52^*
Shares after: 190,629
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F2

OPAL transaction

Class A common stock

Options Exercise

Transaction value
Shares: +57,100
Change %: +30%
Price
Shares after: 247,729
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F1

OPAL transaction

Class A common stock

Tax liability

Transaction value
Shares: -20,584
Change %: -8.3%
Price: $2.52^*
Shares after: 227,145
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F2

OPAL transaction

Class A common stock

Options Exercise

Transaction value
Shares: +5,811
Change %: +2.6%
Price
Shares after: 232,956
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F1

OPAL transaction

Class A common stock

Tax liability

Transaction value
Shares: -2,095
Change %: -0.9%
Price: $2.52^*
Shares after: 230,861
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

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

OPAL transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -80,703
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 80,703
Exercise price
Footnotes: F1, F3

OPAL transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -23,522
Change %: -50%
Price: $0.000000^*
Shares after: 23,522
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 23,522
Exercise price
Footnotes: F1, F4

OPAL transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -57,100
Change %: -33%
Price: $0.000000^*
Shares after: 114,200
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 57,100
Exercise price
Footnotes: F1, F5

OPAL transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -5,811
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 5,811
Exercise price
Footnotes: F1, F6

OPAL transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +101,433
Change %
Price: $0.000000^*
Shares after: 101,433
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 101,433
Exercise price
Footnotes: F7

OPAL transaction Derivative

Stock options (right to buy)

Award

Transaction value
Shares: +56,660
Change %
Price: $0.000000^*
Shares after: 56,660
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 56,660
Exercise price: $2.52
Footnotes: F8, F9, F10, F11, F12

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 12 footnotes

Footnote F1

Each restricted stock unit represents the right to receive, at settlement, one share of Class A common stock. This transaction represents the settlement of restricted stock units in shares of Class A common stock on their scheduled vesting date.

Footnote F2

Represents the shares held by the Company to satisfy tax withholding requirements on vesting of restricted stock units. The total value of securities withheld was based on a price of $2.52 per share, the closing price of Class A common stock on March 31, 2026.

Footnote F3

On March 31, 2023, the Reporting Person was granted 242,111 restricted stock units ("RSUs") pursuant to the terms of the Issuer's 2022 Omnibus Equity Incentive Plan (the "Plan"). RSUs were scheduled to vest in three (3) equal installments on each of the following dates: (i) March 31, 2024, (ii) March 31, 2025, and (iii) March 31, 2026, provided that the Reporting Person continues to provide services to the Issuer through the applicable vesting date. Each restricted stock unit represents the right to receive, at settlement, one share of Class A common stock.

Footnote F4

On March 31, 2024, the Reporting Person was granted 70,565 restricted stock units ("RSUs") pursuant to the terms of the Issuer's 2022 Omnibus Equity Incentive Plan (the "Plan"). RSUs were scheduled to vest in three (3) equal installments on each of the following dates: (i) March 31, 2025, (ii) March 31, 2026, and (iii) March 31, 2027, provided that the Reporting Person continues to provide services to the Issuer through the applicable vesting date. Each restricted stock unit represents the right to receive, at settlement, one share of Class A common stock.

Footnote F5

On March 31, 2025, the Reporting Person was granted 171,300 restricted stock units ("RSUs") pursuant to the terms of the Issuer's 2022 Omnibus Equity Incentive Plan (the "Plan"). RSUs were scheduled to vest in three (3) equal installments on each of the following dates: (i) March 31, 2026, (ii) March 31, 2027, and (iii) March 31, 2028, provided that the Reporting Person continues to provide services to the Issuer through the applicable vesting date. Each restricted stock unit represents the right to receive, at settlement, one share of Class A common stock.

Footnote F6

On March 31, 2023 the Reporting Person was awarded a target number of performance-based restricted stock units ("PRSUs"), subject to satisfaction of performance conditions as determined by the Board of Directors of OPAL Fuels Inc. Each PRSU represented the right to receive, at settlement, one share of Class A common stock. The amount shown represents the actual number of units earned by the Reporting Person pursuant to the satisfaction of performance conditions.

Footnote F7

On March 31, 2026, the Reporting Person was granted 101,433 RSUs pursuant to the Plan. RSUs are scheduled to vest in three (3) equal installments on each of the following dates: (i) March 31, 2027, (ii) March 31, 2028, and (iii) March 31, 2029, provided that the Reporting Person continues to provide services to the Issuer through the applicable vesting date. Each restricted stock unit represents the right to receive, at settlement, one share of Class A common stock.

Footnote F8

Granted pursuant to the Issuer's 2022 Omnibus Equity Incentive Plan (the "Plan").

Footnote F9

The Reporting Person was granted an option to purchase shares of the Issuer's Class A common stock (the "Option") at an exercise price of $2.52 per share, which was the volume weighted average price of the Issuer's Class A common stock for the five days immediately preceding March 31, 2026, as quoted on the Nasdaq Stock Market. The Option vests in three (3) equal installments on each of the following dates: (i) March 31, 2027, (ii) March 31, 2028, and (iii) March 31, 2029, provided, that the Reporting Person continues to provide services to the Issuer through the applicable vesting date.

Footnote F10

In the event that the Reporting Person's employment is terminated by reason of the Reporting Person's disability or termination without cause, the Options shall vest with respect to the number of shares of Class A common stock that would have vested upon the next vesting date following such termination, had the Reporting Person remained an employee.

Footnote F11

Notwithstanding the foregoing, upon the occurrence of a termination of employment by reason of the Reporting Person's (i) termination without cause; or (ii) resignation for good reason, in connection with or within the 24 months following the consummation of a Change in Control (as defined in the Plan and the relevant award agreement), any unvested portion of the Option shall accelerate and vest in full.

Footnote F12

Upon the occurrence of a termination by reason of the Reporting Person's death, any unvested portion of the Option shall accelerate and vest in full.