Shifting the address of his Liberty Global Inc. from Colorado to London last year didn’t just put billionaire John C. Malone in a position to reduce his company’s tax bill.

He also took precautions to avoid the capital-gains hit that the so-called inversion would trigger for him and other investors. The day before the deal was announced, Malone -- the company’s chairman and controlling shareholder -- transferred $600 million of his shares into a tax-exempt charitable trust. He avoided paying taxes on his remaining stake, worth about $260 million, by exploiting IRS regulations meant to block a different loophole.

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