Martin Marietta bids for Vulcan

Construction aggregates maker Martin Marietta Materials has made an unsolicited $5bn offer to buy larger rival Vulcan Materials in stock, in a bid to create the global leader in the industry. The companies began considering a deal more than a year and a half ago, but Vulcan broke off talks in recent months. CJS Securities analyst Arnold Ursaner said the deal makes sense because of the synergies it offers, but that Vulcan may reject it.