Clayton, Mo. and The Woodlands, Texas – – September 16, 2026 -- Olin Corporation (NYSE: OLN) and Huntsman Corporation (NYSE: HUN) confirmed that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act has expired, clearing a key regulatory hurdle for their planned merger of equals.
HSR clearance removes a major closing condition for the chemical sector merger
The expiration satisfies one of the primary conditions required to close the transaction, though the deal still awaits additional regulatory approvals that are currently underway.
Shareholders of both companies approved the deal on August 25, 2026
Investors from Olin and Huntsman overwhelmingly backed the merger of equals at their respective shareholder votes, clearing the corporate governance path toward completion.
Combined entity would merge Olin's chlor-alkali and ammunition operations with Huntsman's diversified chemical portfolio
Huntsman reported approximately $6 billion in 2025 revenue from continuing operations, operating more than 55 manufacturing, R&D and operations facilities across roughly 25 countries with about 6,000 associates. Olin manufactures chlorine, caustic soda, vinyls, epoxies, chlorinated organics, bleach, hydrogen and hydrochloric acid, and its Winchester unit produces sporting, law enforcement and military ammunition alongside contracted military revenue.
Closing remains contingent on further regulatory sign-off
Both companies stated that customary closing conditions, including additional regulatory approvals, remain outstanding before the merger can be finalized.