But ISS left Apple, Facebook ( FB ), Google and others Microsoft included on its list in favor of non-tech companies such as Caterpillar( CAT ), Procter & Gamble ( PG ) and JPMorgan Chase ( JPM ). And while ISS is influential, investors don't follow its recommendations all the time. The firm recommended voting against corporate CEO pay plans this year at 13% of companies in the Russell 3000 Index, according to the most recent data compiled by compensation consulting firm Semler Brossy. Most companies still got a majority of shareholder votes in favor of the pay plan, although support was 28 percentage points lower on average when ISS urged opposition.