Olin, Huntsman Merger of Equals Clears U.S. Antitrust Hurdle
Olin (OLN) and Huntsman (HUN) cleared a U.S. antitrust hurdle for their all-stock merger, expected to create a $12.5B chemicals company with $400M in cost synergies. The deal, targeting 1H 2027 completion, still needs regulatory approvals. OLN shares fell 32.2% and HUN dropped 8.6% over the past year.
How this was made

The 30-second read
Why it matters
The regulatory milestone reduces uncertainty, increasing the likelihood of deal completion and potential synergies.
Market read
The merger creates a leading integrated North American chemicals company, impacting the basic materials sector.
What to watch
Potential regulatory delays abroad, cultural integration issues, and execution risk may dampen upside.
Background
The article reports the expiration of the Hart‑Scott‑Rodino waiting period for the Olin‑Huntsman merger of equals.
Ticker impact
Olin's HSR waiting period expired, clearing a key antitrust hurdle for its merger with Huntsman.
Potential upside as merger likelihood rises; modest price increase expected.
Deal completion becomes more likely with cost synergies of $400M, encouraging investor optimism.
Huntsman's HSR waiting period expired, removing a major antitrust obstacle for its merger with Olin.
Potential upside as merger likelihood rises; modest price increase expected.
Deal completion becomes more likely with cost synergies of $400M, encouraging investor optimism.
Market effects
Basic Materials sector may see further consolidation as large chemical players merge.
North American chemicals market gains a larger integrated player, affecting regional supply dynamics.
The $12.5B chemicals merger could influence global supply chains and pricing.
Counterpoint
The merger could still face antitrust challenges in other jurisdictions or encounter integration risks.
Key entities
- companyOlin Corporation
US‑listed chemicals producer (ticker OLN) merging with Huntsman.
- companyHuntsman Corporation
US‑listed specialty chemicals maker (ticker HUN) merging with Olin.

