Alleghany hasn’t reached a decision on whether to sell its reinsurance unit Transatlantic.

(Bloomberg) — Alleghany Corp. rose the most since December as Reuters reported that the company was approached about the possible sale of its Transatlantic reinsurance unit.

Alleghany jumped 3.3% to $504.02 at 12:45 p.m. in New York trading. A deal could value the unit at $6.5 billion, the news service reported, citing people familiar with the matter it didn’t identify.

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