Company:  OPPENHEIMER PORTFOLIO SER ...
Form Type:  485BPOS
Filing Date:  5/24/2012 
CIK:  0001307792 
Address:  6803 SOUTH TUCSON WAY 
City, State, Zip:  CENTENNIAL, Colorado 80112-3924 
Telephone:  303-768-3200 
Fiscal Year:  01/31 
Register and access this filing in:     
  FORM 485BPOS
    SHAREHOLDER FEES
    OPERATING EXPENSES
    SALES CHARGES
    SALES CHARGES
    Financial Highlights
    Financial Highlights Tables
    FINANCIAL HIGHLIGHTS
      FINANCIAL HIGHLIGHTS TABLE
      FINANCIAL HIGHLIGHTS TABLE
      FINANCIAL HIGHLIGHTS TABLE
      FINANCIAL HIGHLIGHTS TABLE
      FINANCIAL HIGHLIGHTS TABLE
    STATEMENT OF ADDITIONAL INFORMATION AND ANNUAL AND ...
      SHAREHOLDER FEES
      OPERATING EXPENSES
      FUND PERFORMANCE
      SALES CHARGES
      SALES CHARGES
      Financial Highlights
      Financial Highlights Tables
      FINANCIAL HIGHLIGHTS
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
    STATEMENT OF ADDITIONAL INFORMATION AND ANNUAL AND ...
      SHAREHOLDER FEES
      OPERATING EXPENSES
      FUND PERFORMANCE
      SALES CHARGES
      SALES CHARGES
      Financial Highlights
      Financial Highlights Tables
      FINANCIAL HIGHLIGHTS
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
    STATEMENT OF ADDITIONAL INFORMATION AND ANNUAL AND ...
      SHAREHOLDER FEES
      OPERATING EXPENSES
      SALES CHARGES
      SALES CHARGES
      Financial Highlights
      Financial Highlights Tables
      FINANCIAL HIGHLIGHTS
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
        FINANCIAL HIGHLIGHTS TABLE
    STATEMENT OF ADDITIONAL INFORMATION AND ANNUAL AND ...
    Statement of Additional Information May 30, 2012
      Additional Information About the Funds' Investment Policies ...
      Other Investments and Investment Strategies
      Trustees and Officers of the Fund
        NAME AND TITLE
        NAME AND TITLE
        TRUSTEE OWNERSHIP
        COMPENSATION TABLE
        SALES CHARGES
        SALES CHARGES
        SALES CHARGES
        SALES CHARGES
      How to Buy Shares
      Distributions and Taxes
      Additional Information About the Fund
    Footnotes to Appendix A:
      Financial Statements
      Investment Adviser
    PART C
      Item 28. - Exhibits
      Item 29. Persons Controlled by or Under Common Control with ...
      Item 30. - Indemnification
      Item 31. - Business and Other Connections of the Investment ...
        NAME AND TITLE
      Item 32. Principal Underwriter
      Item 33. Location of Accounts and Records
      Item 34. Management Services
      Item 35. Undertakings
    SIGNATURES
    EXHIBIT INDEX
  EXHIBIT 99.J
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M
  EXHIBIT 99.M