0000891092-12-007731.txt : 20121228 0000891092-12-007731.hdr.sgml : 20121228 20121228171145 ACCESSION NUMBER: 0000891092-12-007731 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20121228 DATE AS OF CHANGE: 20121228 EFFECTIVENESS DATE: 20121228 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: 121291651 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 e51242_497.htm SUPPLEMENT

BLACKROCK SERIES, INC.

BlackRock International Fund

(the “Fund”)

SUPPLEMENT DATED DECEMBER 28, 2012

TO THE PROSPECTUS DATED FEBRUARY 28, 2012

Effective January 1, 2013, the Fund’s prospectus is hereby amended to provide that James Bristow, CFA, and Gareth Williams will serve as co-portfolio managers of the Fund. The following changes are made to the prospectus:

In the “Fund Overview” section, the subsection entitled “Portfolio Managers” is deleted and replaced with the following:

Name	Portfolio Manager of the Fund Since	Title
James Bristow, CFA	2007	Managing Director of BlackRock, Inc.
Gareth Williams	2011	Vice President of BlackRock, Inc.

The section in the prospectus captioned “Details About the Funds — How Each Fund Invests — About the Portfolio Management Team of International Fund” is deleted in its entirety and replaced with the following:

ABOUT THE PORTFOLIO MANAGEMENT TEAM OF INTERNATIONAL FUND

International Fund is managed by a team of investment professionals. James Bristow, CFA, and Gareth Williams are the Fund’s portfolio managers and are jointly and primarily responsible for the day-to-day management of the Fund. Please see “Management of the Funds — Portfolio Manager Information” for additional information about the portfolio management team.

The section in the prospectus captioned “Management of the Funds — Portfolio Manager Information — International Fund” is deleted in its entirety and replaced with the following:

Portfolio Manager	Primary Role	Since	Title and Recent Biography
James Bristow, CFA	Jointly and primarily responsible for the day-to-day management of Master International Portfolio’s portfolio, including setting Master International Portfolio’s overall investment strategy and overseeing the management of Master International Portfolio.	2007	Managing Director of BlackRock, Inc. since 2010; Director of BlackRock, Inc. from 2006 to 2009.
Gareth Williams	Jointly and primarily responsible for the day-to-day management of Master International Portfolio’s portfolio, including setting Master International Portfolio’s overall investment strategy and overseeing the management of Master International Portfolio.	2011	Vice President of BlackRock, Inc. since 2010; Associate of BlackRock, Inc. from 2008 to 2009; Analyst of BlackRock, Inc. from 2006 to 2007.

Shareholders should retain this Supplement for future reference.

PRO-13989-1212SUP