425 1 a2149293z425.txt 425 Filed by State Street Research Securities Trust Pursuant to Rule 425 Under the Securities Act of 1933 and Deemed filed pursuant to Rule 14a-2 of the Securities Exchange Act of 1934 Subject Company: State Street Research Securities Trust SEC File No. 33-74628 This filing relates to the proposed reorganizations of certain series of State Street Research trusts ("State Street Research") into certain series of the BlackRock Funds ("BlackRock") pursuant to Agreements and Plans of Reorganization, forms of which are on file with the U.S. Securities and Exchange Commission as appendices to the Combined Prospectus/Proxy Statements on Form N-14 filed by BlackRock on November 8, 2004, and which are incorporated by reference into this filing. The following is a letter sent to shareholders of certain series of the trusts reminding them to instruct the trusts on how to vote their shares. ADJOURNED MEETING NOTICE December 28, 2004 STATE STREET RESEARCH FUNDS ADJOURNED MEETING NOTICE: MEETING OF SHAREHOLDERS HAS BEEN ADJOURNED TO JANUARY 24, 2005 Dear Shareholder: We are writing to inform you that the Shareholder Meeting for your State Street Research fund(s) has been adjourned to allow the fund(s) to solicit additional votes. The meeting has been adjourned to Monday, January 24, 2005 at 4:00 p.m. (Eastern Standard Time). The fund(s) records indicate that you were holding shares of the fund(s) and have not yet cast a vote. Please take the time now to cast your vote. In order for your vote to be represented, we must receive your instructions on or before the meeting on Monday, January 24, 2005. . For your convenience, we have established four easy methods by which to cast your vote: 1. Vote by Telephone: with a live representative by calling 1-877-288-6170 as soon as possible and have the enclosed proxy card in hand to provide our representatives with the information required to cast your vote. 2. Vote by Touch-Tone Telephone: by calling the toll-free number printed on your proxy card. 3. Vote by Internet: by logging on to the web site address listed on your proxy card and following the instructions listed there. 4. Vote by Mail: Complete and sign the enclosed proxy card and return by mail in the enclosed prepaid return envelope (if mailed in the United States). As a shareholder, your vote is important. If we do not receive your vote, a representative of the fund or a third party solicitation firm may contact you by telephone to obtain your vote. We apologize if we have made multiple requests to obtain your vote, but we want you to have every opportunity to participate in this very important fund meeting. If you have any questions about the proxy materials you received, please call the number provided above or contact your financial advisor. Sincerely, /s/ Richard S. Davis Richard S. Davis Chairman of the Board President & Chief Executive Officer ADDITIONAL INFORMATION AND WHERE TO FIND IT BlackRock Funds ("BlackRock") has filed Combined Prospectus / Proxy Statements with the Securities and Exchange Commission Registration Statements, on Form N-14 (Nos. 333-119445, 333-119446, 333-119447, 333-119457, 333-119448, 333-119449, 333-119450, 333-119451, 333-119452, 333-119453, 333-119454, 333-119456, 333-119458, 333-119459 and 333-119461), of BlackRock and certain State Street Research ("SSR") funds and other relevant materials regarding the proposed reorganizations (the "Reorganizations") of certain series of SSR trusts into certain series of BlackRock. The Combined Prospectus/Proxy Statements were sent to security holders of SSR funds seeking their approval of the Reorganizations. WE URGE YOU TO READ THE COMBINED PROSPECTUS/PROXY STATEMENTS FILED BY BLACKROCK WITH THE SEC ON NOVEMBER 8, 2004 AND THE OTHER RELEVANT MATERIALS FILED BY BLACKROCK OR SSR WITH THE SEC BEFORE VOTING OR MAKING ANY INVESTMENT DECISION WITH RESPECT TO THE REORGANIZATIONS, BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT BLACKROCK, SSR AND THE REORGANIZATIONS. You may obtain a free copy of these materials and other documents filed by BlackRock or SSR with the SEC at the SEC's website at www.sec.gov. In addition, the documents filed with the SEC by BlackRock may be obtained free of charge by directing such request to: BlackRock Funds, Bellevue Park Corporate Center, 100 Bellevue Parkway, Wilmington, Delaware, 19809, (800) 441-7762. Documents filed with the SEC by SSR may be obtained free of charge by directing such request to: State Street Research, One Financial Center, Boston, Massachusetts, 02111, (877) 773-8637.