EXHIBIT 16 [Ernst & Young LLP letterhead] February 28, 2002 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Re: BlackRock, Inc. (Commission File Number 1-15305) We have read Item 4 of BlackRock, Inc.'s Form 8-K dated February 28, 2002, and are in agreement with the statements contained therein. Yours very truly, /s/ Ernst & Young LLP