Shares of Huntsman Corporation (HUN) slipped on Tuesday after the company revealed it's merging with Olin Corporation (OLN) in an all-stock deal. The new entity, OlinHuntsman Corp., will boast about $12.5 billion in combined revenue and over $400 million in identified benefits. But investors seem to be weighing the terms, and the stock is taking a hit.

Here's the breakdown: Huntsman shareholders will swap each of their shares for 0.5476 Olin shares. After the deal closes, Olin shareholders will own about 54.5% of the combined company, while Huntsman shareholders will own 45.5%. That split might explain some of the market's reaction—Olin shares were up 7.51% in premarket trading, while Huntsman dropped 5.73% to $14.98.

The chemical giants expect more than $300 million in synergies from purchasing, raw material integration, operations optimization, and SG&A savings. Most of that should show up within 24 months, with the full amount realized by the end of year three. On top of that, they're looking at an additional $100 million in raw-material-integration benefits starting in 2031, plus about $125 million in cash tax benefits from accelerated net operating losses.

Strategically, the deal combines Olin's strengths in chlorine, caustic soda, and feedstocks with Huntsman's polyurethane systems, formulations, and advanced materials. The companies say this structure should improve margins, cash flow, and flexibility across the value chain.

Leadership-wise, Olin CEO Ken Lane will take the helm as CEO of the new Woodlands, Texas-based company. Huntsman CEO Peter Huntsman will become non-executive chairman, Huntsman CFO Phil Lister will stay on as CFO, and Olin CFO Todd Slater will serve as chief integration officer. The transaction has unanimous approval from both boards and is expected to close in the first half of 2027.

Lane described the merger as creating "a more resilient and value-focused chemicals company anchored in North America," with stronger cash flow and opportunities neither company could capture alone. Peter Huntsman added that the deal "takes two great companies and creates a much stronger global leader," noting the exchange ratio is based on 30-day volume-weighted average prices as of June 12, 2026.

For those watching Huntsman's numbers, the company is slated to report its next financial update on July 30, 2026. Analysts expect earnings per share of 5 cents, up from a loss of 20 cents a year ago, and revenue of $1.59 billion, up from $1.46 billion. The stock currently carries a Hold rating with an average price target of $13.86. Recent analyst moves include Morgan Stanley raising its target to $15.00, Wells Fargo to $14.00, and Citigroup to $16.00.

So, why the dip? It could be the exchange ratio, the timeline, or just the usual market skepticism around big mergers. But with significant synergies and a combined powerhouse in the works, the long-term story might be more compelling than the day-one price action suggests.