Ingevity Corporation has entered into a definitive agreement to sell its North Charleston CTO refinery assets and the majority of its Performance Chemicals Industrial Specialties product line to Mainstream Pine Products.

The all-cash transaction will result in net, after tax, proceeds at closing of approximately $110 million plus a potential contingent payment ranging from $0 to $19 million, which is subject to the achievement of future business performance milestones. The transaction is subject to customary and agreed-upon closing conditions and is expected to close by early 2026.

"This transaction marks a significant milestone for Ingevity, reducing portfolio volatility, strengthening our margin and cash flow profile and enhancing future strategic optionality. The transaction proceeds will enable us to accelerate deleveraging and provide additional capital allocation flexibility,” said Ingevity president and CEO, Dave Li. “As we move forward, we continue to advance our portfolio review with a focus on sustainable growth and profitability.”

The CTO refinery assets being acquired by Mainstream are co-located on the campus of Ingevity’s North Charleston, South Carolina, Performance Chemicals manufacturing facility. The transaction is not expected to impact production of Ingevity’s Road Technologies product line nor certain lignin-based dispersants that are manufactured at Ingevity’s North Charleston plant.

“I want to take this opportunity to thank the past and present Ingevity employees who have contributed to Ingevity’s Industrial Specialties product line over the years,” added Li. “We believe Mainstream is a natural next owner to optimize the business going forward, and we expect this will be a mutually beneficial relationship between our respective companies.”