On June 30, Carlisle Companies declined 7.85% in regular trading, trading at $359.48/share, with turnover of $181 million. The sharp drop came after reports that Carlisle has made multiple unsolicited offers to acquire Owens Corning in a potential deal valued at over $10 billion.

According to people familiar with the matter, Carlisle has approached Owens Corning multiple times in recent months to pursue the mega-merger. Owens Corning has not yet engaged substantially with Carlisle, and Carlisle is reportedly evaluating its next move. Specific pricing details remain undisclosed, though preliminary estimates suggest the total transaction value would comfortably exceed $10 billion.

The market reaction was notably divergent — acquisition target Owens Corning surged 12.25% on the session, while Carlisle as the potential acquirer fell sharply, reflecting investor anxiety over the financial burden and integration risks associated with such a large-scale unsolicited transaction. Analysts had a mean price target of $407.29 on Carlisle prior to this development, and the company reported Q1 adjusted EPS of $3.63 beating estimates, though revenue growth remains modest with low-single-digit guidance for the full year.

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