iShares National Muni Bond ETF accounts for 1.3% of Charles Schwab Trust Co’s holdings, making the stock its 22nd largest position. Get iShares National Muni Bond ETF alerts:A number of other large investors have also modified their holdings of the company. iShares National Muni Bond ETF Company ProfileiShares National AMT-Free Muni Bond ETF (the Fund), formerly iShares S&P National AMT-Free Municipal Bond Fund, is an exchange-traded fund (ETF). Visit HoldingsChannel.com to get the latest 13F filings and insider trades for iShares National Muni Bond ETF (NYSEARCA:MUB – Free Report). Receive News & Ratings for iShares National Muni Bond ETF Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for iShares National Muni Bond ETF and related companies with MarketBeat.com's FREE daily email newsletter.