Grassi Investment Management cut its stake in shares of Rio Tinto PLC (NYSE:RIO – Free Report) by 1.0% in the 2nd quarter, Holdings Channel.com reports. Grassi Investment Management’s holdings in Rio Tinto were worth $11,256,000 at the end of the most recent reporting period. Alpine Bank Wealth Management acquired a new stake in shares of Rio Tinto during the first quarter worth $30,000. Get Rio Tinto alerts:Rio Tinto Stock PerformanceShares of RIO stock opened at $66.03 on Friday. Receive News & Ratings for Rio Tinto Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Rio Tinto and related companies with MarketBeat.com's FREE daily email newsletter.