BlackRock Inc., the world's largest asset manager, inadvertently posted confidential information about thousands of financial adviser clients on its website. The data appeared in three spreadsheets, linked on one of the New York-based company's web pages dedicated to its iShares exchange-traded funds. The documents included names and email addresses of financial advisers who buy BlackRock's ETFs on behalf of customers. They also appeared to show the assets under management each adviser had in the firm's iShares ETFs. The links were dated Dec. 5, 2018, but it's unclear how long they were public. The documents were seen by Bloomberg and removed Friday. BlackRock, which oversees assets of almost $6 trillion, is the world's largest issuer of ETFs. One of the spreadsheets appears to list more than 12,000 entries of advisers and their sales representatives at BlackRock. On another, the advisers were categorized in a variety of ways such as "dabblers" or "power users."