0000891092-11-003280.txt : 20110517 0000891092-11-003280.hdr.sgml : 20110517 20110516215355 ACCESSION NUMBER: 0000891092-11-003280 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20110517 DATE AS OF CHANGE: 20110516 EFFECTIVENESS DATE: 20110517 FILER: COMPANY DATA: COMPANY CONFORMED NAME: BLACKROCK SERIES, INC. CENTRAL INDEX KEY: 0001062806 IRS NUMBER: 000000000 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 497 SEC ACT: 1933 Act SEC FILE NUMBER: 333-56203 FILM NUMBER: 11849648 BUSINESS ADDRESS: STREET 1: 100 BELLEVUE PARKWAY CITY: WILMINGTON STATE: DE ZIP: 09809 BUSINESS PHONE: 800-441-7762 MAIL ADDRESS: STREET 1: 100 BELLEVUE PARKWAY CITY: WILMINGTON STATE: DE ZIP: 09809 FORMER COMPANY: FORMER CONFORMED NAME: MERCURY FUNDS INC DATE OF NAME CHANGE: 20010827 FORMER COMPANY: FORMER CONFORMED NAME: MERCURY ASSET MANAGEMENT FUNDS INC DATE OF NAME CHANGE: 19980714 FORMER COMPANY: FORMER CONFORMED NAME: MERCURY ALPHA FUND INC DATE OF NAME CHANGE: 19980601 0001062806 S000002291 BlackRock International Fund C000005981 Investor A C000005982 Investor B C000005983 Investor C C000005984 Institutional C000101856 Class R Shares 497 1 e43584_497.htm SUPPLEMENT

BLACKROCK SERIES, INC.
BlackRock International Fund
(the “Fund”)

Supplement dated May 16, 2011
to the Prospectus and Statement of Additional Information, dated February 28, 2011, as amended

Class R Shares of the Fund are currently closed to all purchases. Class R Shares of the Fund will be available for purchase by eligible investors upon the closing of a proposed reorganization transaction (the “Reorganization”) between the Fund and BlackRock International Value Fund (the “Target Fund”), a series of BlackRock International Value Trust. The closing of the Reorganization, which is expected to occur following the close of business on July 15, 2011, is contingent upon approval by the shareholders of the Target Fund.

Shareholders should retain this Supplement for future reference.

Code: PR&SAI-INTL-0511SUPR