Allstream Insiders Summary

Olin Corporation and Huntsman Corporation shareholders have approved the proposals required for the companies’ planned all-stock merger of equals. The August 25, 2026 votes remove a significant transaction condition, but the merger has not closed.

Based on preliminary results:

• Approximately 97% of votes cast at Olin’s special meeting supported the transaction, representing approximately 81% of Olin’s outstanding shares.
• Approximately 99% of votes cast at Huntsman’s special meeting supported the merger, representing approximately 75% of Huntsman’s outstanding shares.
• The companies said the transaction will proceed through a direct merger structure, subject to the remaining closing conditions.

The results remain subject to certification by the companies’ independent inspectors of elections. Olin and Huntsman said final results will be reported in separate Current Reports on Form 8-K filed with the U.S. Securities and Exchange Commission.

The transaction remains targeted to close during the first half of 2027, subject to required regulatory approvals and the satisfaction or waiver of other customary closing conditions.

If completed, the combined organization would be renamed OlinHuntsman Corporation and headquartered in The Woodlands, Texas. The combination is intended to connect Olin’s chlor-alkali, vinyls, epoxy and related chemical-manufacturing capabilities with Huntsman’s polyurethane systems, formulations and advanced-materials portfolio.

Olin-Huntsman Merger Tracker

What Did Olin and Huntsman Shareholders Approve?

Shareholders approved the transaction-related proposals required for Olin and Huntsman to complete their proposed merger. The preliminary results showed substantial support at both special meetings.

Olin said approximately 97% of votes cast supported consummation of the transaction through a direct merger. Huntsman said approximately 99% of votes cast supported the merger. Those percentages describe votes cast; the companies separately reported the portion of total outstanding shares represented at each meeting.

The companies’ announcement states that the transaction will proceed through a direct merger based on the preliminary voting results. That statement remains conditioned on completion of the remaining requirements under the merger agreement.

Final voting results have not yet been presented in the cited announcement. They remain subject to certification and later SEC reporting.

Has the Olin-Huntsman Merger Closed?

No. Shareholder approval is a transaction milestone, not the closing of the merger. Olin and Huntsman continue to target completion during the first half of 2027.

The companies said closing remains subject to:

• Receipt of required regulatory approvals.
• Satisfaction or waiver of other customary closing conditions.
• Completion of the remaining transaction steps required by the merger agreement.

Until those conditions are satisfied and the companies announce completion, Olin and Huntsman remain separate businesses. The OlinHuntsman name, headquarters and leadership structure should be described as post-closing plans rather than current corporate arrangements.

What Would OlinHuntsman Produce?

The proposed combination would join Olin’s upstream and intermediate chemical capabilities with Huntsman’s downstream products, formulations and advanced materials. The companies describe this as a vertically integrated platform designed to serve customers at multiple points in the chemical value chain.

Olin’s disclosed chemical portfolio includes:

• Chlorine and caustic soda.
• Vinyls.
• Epoxies.
• Chlorinated organics.
• Bleach.
• Hydrogen.
• Hydrochloric acid.

Huntsman’s portfolio includes polyurethane systems, formulation technologies, performance products and advanced materials serving automotive, construction, infrastructure and industrial markets.

The companies said the combined platform would have a significant U.S. Gulf Coast presence as well as operations in Europe and Asia. Huntsman reports more than 55 manufacturing, research-and-development and operating facilities across approximately 25 countries.

The shareholder-approval announcement does not provide a consolidated plant list or identify how individual facilities would be organized after closing.

Why Do the Companies Want to Combine Their Chemical Platforms?

Olin and Huntsman say the transaction would improve vertical integration by connecting Olin’s chemical feedstocks and large-scale production assets with Huntsman’s downstream formulations and application-focused materials. This is the companies’ stated strategic rationale and remains dependent on completing and successfully integrating the transaction.

The companies previously identified more than $400 million of targeted cost synergies and integration benefits. They attributed the expected benefits to purchasing, raw-material integration, optimization of operations and corporate-cost savings.

Those targets are forward-looking estimates. The announcements do not allocate the expected benefits to particular plants, employees, maintenance programs, suppliers or construction projects.

The merger materials also do not state that a particular Olin or Huntsman facility will close, expand, reduce production or change products. Any facility-level action should be reported only after the companies make a specific disclosure or a regulator receives a relevant filing.

What Does the Vote Mean for Chemical Contractors and Suppliers?

The vote advances a large chemical-industry combination, but it does not create an announced capital-project or procurement program. Contractors and suppliers may eventually see changes in purchasing, feedstock integration, logistics, maintenance planning and facility investment if the merger closes and the integration program advances.

The companies have not announced through the shareholder-approval release:

• New plant construction or capacity expansions.
• Facility closures or production transfers.
• Integration-related construction budgets.
• Turnaround or maintenance-schedule changes.
• Engineering, construction or demolition contracts.
• Equipment purchases or supplier awards.
• Changes to active contractor agreements.

The companies’ targeted operational benefits should not be interpreted as evidence that a specific facility modification or vendor opportunity has been approved.

What Should the Downstream Market Watch Next?

The next transaction milestones are certification of the final vote, SEC reporting, regulatory decisions and an eventual closing announcement. After closing, commercially useful disclosures may include the combined operating structure, purchasing organization, facility strategy and capital priorities.

Downstream contractors and suppliers should monitor:

• Olin and Huntsman Form 8-K filings reporting final vote results.
• Regulatory-review announcements and any conditions attached to approvals.
• The final closing announcement.
• OlinHuntsman’s post-closing business and facility organization.
• Integration plans affecting raw-material flows, logistics and operating networks.
• Facility-specific capital, maintenance or optimization announcements.

No individual plant decision should be inferred from the companies’ high-level synergy targets.

Allstream Perspective

Shareholder approval moves the Olin-Huntsman merger closer to completion and provides a clearer path toward a vertically integrated chemical company with substantial North American manufacturing exposure. For the downstream supply chain, the combination could eventually affect how feedstocks, production, logistics and purchasing are coordinated across the two portfolios.

The immediate milestone is corporate rather than physical. No new project, turnaround, facility closure or construction package accompanied the vote announcement.

Until regulatory approvals are received and the transaction closes, Allstream will treat Olin and Huntsman as separate companies and describe OlinHuntsman as the proposed post-closing organization. Facility-level implications should be added only when the companies or applicable regulators publish specific decisions.