The activist investment firm had sent shock waves through Corporate America in May when it targeted Exxon Mobil ( XOM - Free Report ) and successfully placed three candidates on the board of directors. The Engine No. 1 Transform 500 ETF ( VOTE - Free Report ), which started trading in June, intends to encourage transformational changes in companies through shareholder activism. The fund invests in 500 of the largest US public companies and comes with an expense ratio of just 0.05%.