SCHEDULE 13D/A

OPAL Fuels Inc

Class A common stock, par value $0.0001 per share · CUSIP: 68347P103

Event date: 2025-04-22

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Mark ComoraReported CIK 0001827111

  Shares: 145,336,349.00 · Class: 84.2%

• OPAL HoldCo LLCReported CIK 0001938310

  Shares: 142,377,450.00 · Class: 82.5%

• Hillman RNG Investments, LLC

  Shares: 2,021,587.00 · Class: 1.2%

• Fortistar LLCReported CIK 0001841238

  Shares: 145,279,637.00 · Class: 84.2%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.