(Bloomberg) -- Stephen Silberstein is fed up with elite complacency, corporate fat cats and self-dealing. And he’s threatening to make himself heard at the ballot box.

Silberstein knows a thing or two about fat cats. He amassed a fortune as the co-founder of Innovative Interfaces, a developer of library software for services including cataloging and circulation. Now he’s deploying a trust he owns in an attempt to prod BlackRock to vote no on big executive pay packages. He’s among a growing number of investors and nonprofit groups pressuring fund managers to keep a closer eye on how companies pay top executives and influence politics.

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