Waste Resource Management confirmed on July 22 that it has closed on a majority of Darling Ingredients' trap grease collection and processing assets, acquired from DAR PRO Solutions.
The announcement came from WRM directly. We covered the deal when it first surfaced, in WRM Just Bought Most of DAR PRO's Trap Grease Routes. This is the close.
Trap grease is the fats, oils, and grease that get scraped out of restaurant grease interceptors. It is the low-value cousin of used cooking oil. Wetter, dirtier, harder to move, and historically treated as a disposal problem rather than a feedstock.
WRM is the holding company behind Southwaste Disposal in Texas and Florida, McDonald Farms Enterprises in Colorado, and Silver City Processing in Las Vegas. The company says it recycled more than 275 million gallons of water across its operations in 2025 and expects the acquired assets to help it triple that figure over the next year.
What transferred: equipment, service routes, and processing infrastructure. What did not get disclosed: the price, the number of accounts, the number of routes, or which DAR PRO markets are in and which are out.
That last gap matters. "A majority" means Darling kept something. WRM did not say what, and Darling has not put out its own statement on the close.
What WRM is promising customers
The release leans hard on continuity. No service interruption. No rate increase tied to the transition. Many DAR PRO team members staying on, which WRM describes as the same faces at the door and the same voices on the phone. New investment in equipment is the one thing being framed as a change.
Remittance is moving, though. Checks now go to a Southwaste Disposal box in Lafayette, Louisiana, and ACH goes to a WRM address. Anyone with DAR PRO invoices in flight should verify where payment is landing.
Why it matters
Trap grease has been the quiet corner of the FOG business for years. Consolidating a national renderer's routes into a regional water-focused operator is a real shift in who controls that volume, and in whether it stays a disposal stream or moves toward feedstock.
For collectors and haulers, it means a new competitor with real density in Texas, Florida, Colorado, and Nevada. For traders and brokers, it is one fewer counterparty on the brown grease side. For processors, the question is what WRM does with the volume once the equipment investment lands.
We will keep watching for Darling's side of it.
