Company:  PARNASSUS FUNDS (PARMX)
Form Type:  497
Filing Date:  3/17/2020 
CIK:  0000747546 
Address:  ONE MARKET #1600 
City, State, Zip:  SAN FRANCISCO, California 94105 
Telephone:  (415) 778-0200 
Fiscal Year:  12/31 
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  FORM 497
    Investment Objective
    Fees and Expenses
      OPERATING EXPENSES
    Principal Investment Strategies
    Principal Risks
    Performance Information
      FUND PERFORMANCE
    Investment Objective
    Fees and Expenses
      OPERATING EXPENSES
    Principal Investment Strategies
    Principal Risks
    Performance Information
      FUND PERFORMANCE
    Investment Objective
    Fees and Expenses
      OPERATING EXPENSES
      OPERATING EXPENSES
    Principal Investment Strategies
    Principal Risks
    Performance Information
      FUND PERFORMANCE
    Investment Objective
    Fees and Expenses
      OPERATING EXPENSES
      OPERATING EXPENSES
    Principal Investment Strategies
    Principal Risks
    Performance Information
      FUND PERFORMANCE
    Investment Objective
    Fees and Expenses
      OPERATING EXPENSES
      OPERATING EXPENSES
    Principal Investment Strategies
    Principal Risks
    Performance Information
      FUND PERFORMANCE
    Investment Objectives and Policies and Non-Principal Risks
    Other Policies and Non-Principal Risks
    Management of the Funds
    Net Asset Value
    Additional Information Specific to Foreign Securities
    Distributions and Taxes
    Financial Highlights
      FINANCIAL HIGHLIGHTS TABLE
    Investment Adviser
    STATEMENT OF ADDITIONAL INFORMATION FOR
      INVESTMENT OBJECTIVES AND POLICIES
      MANAGEMENT
        NAME AND TITLE
        NAME AND TITLE
        COMPENSATION TABLE
        TRUSTEE OWNERSHIP
      Code of Ethics
      CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
      PORTFOLIO TRANSACTIONS
        PORTFOLIO OF INVESTMENTS
        COMPENSATION TABLE
        COMPENSATION TABLE
        TRUSTEE OWNERSHIP
      NET ASSET VALUE
      Taxation of Distributions
      FINANCIAL STATEMENTS
      PARNASSUS INVESTMENTS PROXY VOTING POLICIES AND PROCEDURES