BlackRock Inc. has amended its ownership structure related to Ryman Hospitality Properties common stock, a move required as one of the global assets management titan's units has crossed a threshold of control of the Nashville-based real estate investment trust’s stock.

According to a Securities and Exchange Commission (SEC) filing, iShares Core S&P Small-Cap ETF, a BlackRock-managed exchange traded fund, recently topped 5 percent ownership of RHP shares.