Joe Nocera, Columnist

Bill Ackman's Big Triumph Becomes His Big Problem

One of the activist investor's greatest deals is under legal attack. There's no easy way out.

Betwixt and between.

Photographer: Andrew Harrer/Bloomberg
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Most of the time, securities class-action lawsuits are nothingburgers. A company’s stock price drops unexpectedly, some plaintiffs’ lawyers sue on behalf of supposedly aggrieved investors, and after a year or two of legal wrangling, the parties settle for what amounts to pocket change for the corporation.

But every once in a while, a securities class-action suit comes along that combines high stakes, serious legal issues and potentially astronomical damages. A case called “In Re Allergan Inc Proxy Violation Securities Litigation” is one such lawsuit. It should be getting a lot more attention than it is.