Steward Partners Expands Holdings in Innovator U.S. Small Cap ETF Steward Partners Investment Advisory LLC increased its stake in Innovator U.S. Small Cap Power Buffer ETF by 82.4% during the fourth quarter, acquiring an additional 1,967 shares. The firm now owns 4,354 shares valued at approximately $133,000. The ETF, tied to the Russell 2000 index, provides buffered losses and capped gains.1