Company:  STATE STREET INSTITUTIONA ... (ELFXX)
Form Type:  497
Filing Date:  11/5/2019 
CIK:  0001107414 
Address:  STATE STREET FINANCIAL CENTER
ONE LINCOLN STREET
 
City, State, Zip:  BOSTON, Massachusetts 02111 
Telephone:  (617) 662-3239 
Fiscal Year:  12/31 
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  FORM 497
    STATEMENT OF ADDITIONAL INFORMATION
      DESCRIPTION OF THE FUND AND ITS INVESTMENTS AND RISKS
      ADDITIONAL INVESTMENTS AND RISKS
      Additional Information
      MANAGEMENT OF THE TRUST
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
      Trustee Ownership of Securities of the Trust, Adviser and ...
        TRUSTEE OWNERSHIP
        COMPENSATION TABLE
      CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
      INVESTMENT ADVISORY AND OTHER SERVICES
      Investment Advisory Agreement
      Code of Ethics
      PRICING OF SHARES
      Taxation of Distributions Received by Shareholders
      FINANCIAL STATEMENTS
    APPENDIX A-TRUST'S PROXY VOTING PROCEDURES
    APPENDIX B-ADVISER'S PROXY VOTING PROCEDURES AND GUIDELINES