Who's next in Engine No. 1's sights? It's transparent

After hounding Exxon and Tyson foods, activist investors ready for next dogfights.

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Not to be forgotten: The Exxon Valdez supertanker hit a reef on March, 1989 in Prince William Sound, Alaska, and spilled more than 10 million gallons of crude oil. Above, cleanup efforts at Big Smith Island. Photo…