UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-PX ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-22014 ----- PIONEER DIVERSIFIED HIGH INCOME TRUST ---------------------------------------------------- (Exact name of registrant as specified in charter) 60 State Street Boston, MA 02109 ---------------------------------------------------- (Address of principal executive offices) Terrence J. Cullen 60 State Street Boston, MA 02109 ---------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: March 31 Date of reporting period: July 1, 2009 to June 30, 2010 SIGNATURES Pursuant to the requirements of the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Diversified High Income Trust By (Signature and Title) /s/ John F. Cogan, Jr. ------------------------- John F. Cogan, Jr., Chairman and President Date August 19, 2010 ---------------- ==================== PIONEER DIVERSIFIED HIGH INCOME TRUST ===================== AINSWORTH LUMBER CO LTD Ticker: ANS Security ID: C01023206 Meeting Date: MAY 13, 2010 Meeting Type: Annual Record Date: APR 13, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1.1 Elect Director Robert Chadwick For For Management 1.2 Elect Director Jay Gurandiano For For Management 1.3 Elect Director Paul Houston For For Management 1.4 Elect Director Richard Huff For Withhold Management 1.5 Elect Director John Lacey For For Management 1.6 Elect Director Gordon Lancaster For For Management 1.7 Elect Director Jonathan I. Mishkin For For Management 2 Approve Deloitte & Touche LLP as For For Management Auditors and Authorize Board to Fix Their Remuneration -------------------------------------------------------------------------------- ALERIS INTERNATIONAL INC Ticker: Security ID: 014477AG8 Meeting Date: APR 29, 2010 Meeting Type: Written Consent Record Date: MAR 10, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 The Plan None For Management -------------------------------------------------------------------------------- ARCO CHEMICAL CO. Ticker: RCM Security ID: 001920AB3 Meeting Date: APR 15, 2010 Meeting Type: Written Consent Record Date: MAR 12, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 The Plan None For Management 2 I Am A Qualified Investor None For Management -------------------------------------------------------------------------------- GEORGIA GULF CORPORATION Ticker: GGC Security ID: 373200302 Meeting Date: MAY 18, 2010 Meeting Type: Annual Record Date: MAR 26, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1.1 Elect Director Mark L. Noetzel For For Management 1.2 Elect Director Stephen E. Macadam For For Management 1.3 Elect Director David N. Weinstein For For Management 2 Adopt Majority Voting for Uncontested For For Management Election of Directors 3 Declassify the Board of Directors For For Management 4 Reduce Supermajority Vote Requirement For For Management 5 Ratify Auditors For For Management -------------------------------------------------------------------------------- LEAR CORPORATION Ticker: LEA Security ID: 521865204 Meeting Date: MAY 13, 2010 Meeting Type: Annual Record Date: MAR 22, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 Ratify Auditors For For Management -------------------------------------------------------------------------------- NEXUS FLOATING PRODUCTION LTD. Ticker: NEXUS Security ID: Y6265HAA0 Meeting Date: JUL 3, 2009 Meeting Type: Bondholder Record Date: # Proposal Mgt Rec Vote Cast Sponsor 1 Approve Summons For For Management 2 Approve Agenda For For Management 3 Approve Election of Two Bondholders to For For Management Sign Minutes Together with the Chairperson 4 Approve Change of the Loan Agreement For For Management -------------------------------------------------------------------------------- NEXUS FLOATING PRODUCTION LTD. Ticker: NEXUS Security ID: Y6265HAA0 Meeting Date: JUL 29, 2009 Meeting Type: Bondholder Record Date: # Proposal Mgt Rec Vote Cast Sponsor 1 Approve Summons For For Management 2 Approve Agenda For For Management 3 Approve Election of Two Bondholders to For For Management Sign Minutes Together with the Chairperson 4 Approve Request for Change of the Loan For For Management Agreement -------------------------------------------------------------------------------- NEXUS FLOATING PRODUCTION LTD. Ticker: NEXUS Security ID: Y6265HAA0 Meeting Date: AUG 24, 2009 Meeting Type: Bondholder Record Date: # Proposal Mgt Rec Vote Cast Sponsor 1 Approve Summons For For Management 2 Approve Agenda For For Management 3 Approve Election of Two Bondholders to For For Management Sign the Minutes Together With the Chairperson 4 Approve Request for Change of the Bond For For Management Loan Agreement -------------------------------------------------------------------------------- NEXUS FLOATING PRODUCTION LTD. Ticker: NEXUS Security ID: Y6265HAA0 Meeting Date: NOV 11, 2009 Meeting Type: Bondholder Record Date: # Proposal Mgt Rec Vote Cast Sponsor 1 Approve Summons For For Management 2 Approve Agenda For For Management 3 Approve Election of Two Bondholders to For For Management Sign the Minutes Together With the Chairperson 4 Approve Restructuring and Changes to For For Management the Bond Loan Agreements -------------------------------------------------------------------------------- SEVAN MARINE ASA Ticker: SEVAN Security ID: R776D4AE3 Meeting Date: JUN 25, 2010 Meeting Type: Bondholder Record Date: JUN 11, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 Approve Summons For For Management 2 Approve Agenda For For Management 3 Elect Minutes Keepers For For Management 4 Approve Amendments to Bond Agreement For For Management -------------------------------------------------------------------------------- SKEIE DRILLING & PRODUCTION ASA Ticker: SKDP Security ID: R7034SAB0 Meeting Date: JUL 15, 2009 Meeting Type: Bondholder Record Date: # Proposal Mgt Rec Vote Cast Sponsor 1 Approval of the Summons For For Management 2 Approval of the Agenda For For Management 3 Designate Inspector(s) of Minutes of For For Management the Meeting 4 Amend Resolutions Passed at June 29, For For Management 2009 Meeting Re: Consent from the Lending Syndicate; Proportionate Dilution of Ownership of Skeie Group and Wideluck; The Event of Default -------------------------------------------------------------------------------- SKEIE DRILLING & PRODUCTION ASA Ticker: SKDP Security ID: R7034S104 Meeting Date: SEP 24, 2009 Meeting Type: Special Record Date: # Proposal Mgt Rec Vote Cast Sponsor 1 Open Meeting; Registration of Attending None None Management Shareholders and Proxies 2 Elect Chairman of Meeting; Designate For For Management Inspector(s) of Minutes of Meeting 3 Approve Notice of Meeting and Agenda For For Management 4 Elect Lesley Jones and Ngiam Jih Wong For For Management as Directors 5 Amend Articles Re: Approve Electronic For For Management Publication of Meeting Notice Material -------------------------------------------------------------------------------- SKEIE DRILLING & PRODUCTION ASA Ticker: SKDP Security ID: R7034S104 Meeting Date: MAY 6, 2010 Meeting Type: Special Record Date: APR 22, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 Open Meeting; Registration of Attending None None Management Shareholders and Proxies 2 Elect Chairman of Meeting; Designate For For Management Inspector(s) of Minutes of Meeting 3 Approve Notice of Meeting and Agenda For For Management 4 Approve Issuance of 208.2 Million For For Management Shares for a Private Placement 5 Approve Creation of NOK 21 Million Pool For For Management of Capital without Preemptive Rights -------------------------------------------------------------------------------- SKEIE DRILLING & PRODUCTION ASA Ticker: SKDP Security ID: R7034S104 Meeting Date: JUN 22, 2010 Meeting Type: Annual Record Date: JUN 8, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 Open Meeting; Registration of Attending None None Management Shareholders and Proxies 2 Elect Chairman of Meeting; Designate For For Management Inspector(s) of Minutes of Meeting 3 Approve Notice of Meeting and Agenda For For Management 4 Approve Financial Statements and For For Management Statutory Reports 5 Approve Remuneration of Directors in For For Management the Amounts of NOK 450,000 to Bjarne Skeie, NOK 208,333 to Margaret Hawkins, NOK 250,000 to Anne Breive, NOK 208,333 to Ngiam Wong, and NOK 41,666 to Mah Edmund 6 Approve Remuneration of Auditors For For Management 7 Approve Remuneration Policy And Other For For Management Terms of Employment For Executive Management -------------------------------------------------------------------------------- TEMIR CAPITAL BV Ticker: Security ID: 87973TAA4 Meeting Date: MAR 31, 2010 Meeting Type: Bondholder Record Date: FEB 23, 2010 # Proposal Mgt Rec Vote Cast Sponsor 1 Approve Extraordinary Resolution Re: For For Management (i) Restructuring Plan, (ii) Instruct Trustee to Vote Principal Amount of Notes Outstanding For Restructuring Plan at Creditors' Meeting, (iii) Instruct Trustee to Accelerate Notes and Demand Payment Under Guarantee ========== END NPX REPORT