Decarbonization Plus Acquisition Corp IV (Nasdaq: DCRD), sponsored by Decarbonization Plus Acquisition Holdings IV LLC — an affiliate of Riverstone Holdings — completed its business combination with Hammerhead Energy Inc. in late 2022, closing out its SPAC chapter and transitioning Hammerhead onto Nasdaq as a publicly traded Canadian oil-sands focused energy producer. DCRD priced its IPO in February 2021, targeting the clean-energy transition and decarbonization sector before ultimately pairing with an upstream oil and gas operator. The January 2023 8-K filing reflects post-closing corporate reporting obligations following the completed merger. For comprehensive DCRD filing history, deal terms, and sponsor data, sign up for full access at SpacDesk.