Interstate batteries are made by a company named "Interstate Batteries," which may be a bit of an anticlimax, but it's true. They're headquartered in Dallas, Texas.
Currently, 2017, the Mopar batteries at the dealer where I work are made and delivered by Interstate Battery.
Interstate Batteries is privately held, so it does not have a stock symbol.
Interstate is a battery company making their own batteries since 1950.
Interstate Battery Company
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Johnson Controls
Interstate Batteries is manufactured by Interstate Batteries Inc., a company founded in 1952 and headquartered in Dallas, Texas. It specializes in the production and distribution of automotive and other types of batteries. The company operates a network of distributors and retailers across the United States and in several international markets.
Believe it or not, Interstate.
interstate
Currently (2014) the Mopar batteries are delivered on an Interstate Battery truck to the dealer where I work.
Interstate Batteries offers two batteries to replace the TY25881 with. The MT-51 and I-45.