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 811-23613

-----

Pioneer
      Core Trust I

----------------------------------------------------

(Exact
      name of registrant as specified in charter)

60
      State Street Boston, MA  02109

----------------------------------------------------

(Address
      of principal executive offices)

Christopher
      J. Kelley

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:  August 31

Date
      of reporting period:  July 1, 2020 to June 30, 2021

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
      Core Trust I

By
      (Signature and Title) /s/ Lisa M. Jones

                         -------------------------

                         Lisa
      M. Jones, Chief Executive Officer

                         &
      President

Date: August
      17, 2023

=======================
      Pioneer High Income Municipal Portfolio =====================

There
      is no proxy voting activity for the fund, as the fund did not hold any

votable
      positions during the reporting period.

==========
      END NPX REPORT