Assetmark Inc. Significantly Increases RFV Stake Assetmark Inc. has raised its position in the Invesco S&P MidCap 400 Pure Value ETF by 458.6% during the fourth quarter, now holding 972 shares valued at $118,000. Other institutional investors, such as FMR LLC and Matrix Trust Co., have also adjusted their holdings in the ETF, reflecting growing interest in mid-cap value investments.12