UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

                   CERTIFIED SHAREHOLDER REPORT OF REGISTERED
                        MANAGEMENT INVESTMENT COMPANIES



		Investment Company Act file number 811-07318

                          Pioneer Series Trust VIII
               (Exact name of registrant as specified in charter)


                       60 State Street, Boston, MA 02109
              (Address of principal executive offices) (ZIP code)


            Terrence J. Cullen, Pioneer Investment Management, Inc.,
                       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:  November 30


Date of reporting period:  December 1, 2016 through May 31, 2017


Form N-CSR is to be used by management investment companies to file reports with
the Commission not later than 10 days after the transmission to stockholders of
any report that is required to be transmitted to stockholders under Rule 30e-1
under the Investment Company Act of 1940 (17 CFR 270.30e-1).  The Commission may
use the information provided on Form N-CSR in its regulatory, disclosure review,
inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR,
and the Commission will make this information public. A registrant is not
required to respond to the collection of information contained in Form N-CSR
unless the Form displays a currently valid Office of Management and Budget
("OMB") control number. Please direct comments concerning the accuracy of the
information collection burden estimate and any suggestions for reducing the
burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW,
Washington, DC 20549-0609.  The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. ss. 3507.


ITEM 1. REPORTS TO STOCKHOLDERS.


                      Pioneer International
                      Equity Fund

--------------------------------------------------------------------------------
                      Semiannual Report | May 31, 2017
--------------------------------------------------------------------------------

                      Ticker Symbols:
                      Class A     PIIFX
                      Class C     PCITX
                      Class Y     INVYX

                      [LOGO]    Amundi Pioneer
                                ==============
                              ASSET MANAGEMENT


                        visit us: www.amundipioneer.com


Table of Contents


                                                                           
President's Letter                                                             2

Portfolio Management Discussion                                                4

Portfolio Summary                                                              9

Prices and Distributions                                                      10

Performance Update                                                            11

Comparing Ongoing Fund Expenses                                               14

Schedule of Investments                                                       16

Financial Statements                                                          23

Notes to Financial Statements                                                 30

Approval of New and Interim Management Agreements                             40

Trustees, Officers and Service Providers                                      49


               Pioneer International Equity Fund | Semiannual Report | 5/31/17 1


President's Letter

U.S. markets have continued to generate positive returns during the first
several months of 2017, with so-called "risk" assets, such as equities and
credit-sensitive bonds, posting solid gains. U.S. equities, as measured by the
Standard & Poor's 500 Index, returned slightly more than 6% in the first
calendar quarter of the year and more than 3% for the second quarter. Meanwhile,
high-yield securities have dominated bond market performance thus far in 2017.

The post-election market momentum we witnessed in the U.S. during the final
weeks of the fourth quarter of 2016 slowed only when oil prices slumped in
March, due to both higher-than-expected inventories and concerns over whether
OPEC (Organization of Petroleum Exporting Countries) would continue its supply
cuts. Not even the Federal Reserve System's (the Fed's) two rate hikes since
March, nor Britain's trigger of Article 50 to begin the "Brexit" process caused
any dramatic sell-off of risk assets. In fact, we are encouraged by the more
hawkish stance of the Fed with regard to interest rates, in light of our view
that current U.S. bond yields do not fairly reflect the prospective levels of
economic activity and inflation. We expect the Fed to continue to tighten
monetary policy, with at least one more rate hike likely to occur before the end
of 2017.

While U.S. gross domestic product (GDP) did slow in the first quarter, ending up
at 1.4% after revisions, the expectation is for GDP growth to pick-up in the
second quarter, with a solid consumer leading the way. It is our view that the
U.S. economy may lead all developed nations in 2017, with GDP growth in excess
of 2% for the full year, even if proposed tax and regulatory reforms are not
passed into law in the near future. We also believe solid domestic employment
figures should continue to support consumption and the housing market, and that
stronger corporate profits and increased government spending may contribute to
economic growth in 2018 and beyond. In addition, as we monitor global Purchasing
Manager Indices (PMIs), we note that their numbers are increasing, which
suggests that growth in global economies is also improving. (PMIs are used to
measure the economic health of the manufacturing sector.)

There are, as always, some risks to our outlook. First, the market already has
priced in a good deal of the Trump economic reform platform, and that could lead
to near-term disappointment if Congressional follow-through does not happen this
year. The future of the Affordable Care Act (ACA) is another potential concern,
as Congressional leaders have, thus far, failed to generate

2 Pioneer International Equity Fund | Semiannual Report | 5/31/17


enough support to get new health care legislation approved by both houses.
However, if a bill is eventually passed that either eliminates or significantly
alters the ACA, the new law will undoubtedly have an effect on the health care
sector, one of the largest segments of the U.S. economy. Geopolitical risks, of
course, remain a potential headwind, given ongoing strife in the Middle East and
renewed tensions on the Korean Peninsula.

While our current outlook is generally optimistic, conditions can and often do
change, and while passive investment strategies may have a place in one's
overall portfolio, it is our view that all investment decisions are active
choices.

Throughout our history, we have believed in the importance of active management.
The active decisions to invest in equities or fixed-income securities are made
by a team of experienced investment professionals focusing on identifying value
across global markets using proprietary research, careful risk management, and a
long-term perspective. We believe our shareowners can benefit from the
experience and tenure of our investment teams as well as the insights generated
from our extensive research process.

As always, and particularly during times of market uncertainty, we encourage you
to work with your financial advisor to develop an overall investment plan that
addresses both your short- and long-term goals, and to implement such a plan in
a disciplined manner.

We greatly appreciate the trust you have placed in us and look forward to
continuing to serve you in the future.

Sincerely,

/s/ Lisa M. Jones

Lisa M. Jones
Head of the Americas, President and CEO of US
Amundi Pioneer Asset Management USA, Inc.
May 31, 2017

Any information in this shareowner report regarding market or economic trends or
the factors influencing the Fund's historical or future performance are
statements of opinion as of the date of this report. Past performance is no
guarantee of future results.

               Pioneer International Equity Fund | Semiannual Report | 5/31/17 3


Portfolio Management Discussion | 5/31/17

Important Note: On July 3, 2017, Amundi acquired Pioneer Investments, a group of
asset management companies located throughout the world. Amundi, one of the
world's largest asset managers, is headquartered in Paris, France. As a result
of the transaction, Pioneer Investment Management, Inc., the Fund's investment
adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's
wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer
Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned
subsidiary of UniCredit S.p.A.

In connection with the transaction, the names of the Fund's investment adviser
and principal underwriter changed. Effective July 3, 2017, the name of Pioneer
Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and
the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer
Distributor, Inc.

This transaction does not impact your existing relationship with Pioneer
Investments, your advisor, or the methods you use to communicate with us, as the
investor contact telephone numbers and services you expect will remain the same.
We are excited, however, to be launching a new website representing the combined
company. Come visit us at: www.amundipioneer.com

In the following interview, Madelynn Matlock discusses the market environment
for international equities and the factors that influenced the performance of
Pioneer International Equity Fund during the six-month period ended May 31,
2017. Ms. Matlock, a senior vice president and a portfolio manager at Amundi
Pioneer Asset Management, Inc. (Amundi Pioneer), and Marco Pirondini, Executive
Vice President, Head of Equities, U.S., and a portfolio manager at Amundi
Pioneer, are responsible for the day-to-day management of the Fund.

Q    How did the Fund perform during the six month period ended May 31, 2017?

A    Pioneer International Equity Fund's Class A shares returned 18.84% at net
     asset value during the six-month period ended May 31, 2017, while the
     Fund's benchmark, the Morgan Stanley Capital International (MSCI) Europe,
     Australasia, Far East (EAFE) ND Index (the MSCI EAFE Index)(1),

(1)  The MSCI information may only be used for your internal use, may not be
     reproduced or re-disseminated in any form and may not be used as a basis
     for or a component of any financial instruments or products or indices.
     None of the MSCI information is intended to constitute investment advice or
     a recommendation to make (or refrain from making) any kind of investment
     decision and may not be relied on as such. Historical data and analysis
     should not be taken as an indication or guarantee of any future performance
     analysis, forecast or prediction. The MSCI information is provided on an
     "as is" basis and the user of this information assumes the entire risk of
     any use made of this information. MSCI, each of its affiliates and each
     other person involved in or related to compiling, computing or creating any
     MSCI information (collectively, the "MSCI Parties") expressly disclaims all
     warranties (including, without limitation, any warranties of originality,
     accuracy, completeness, timeliness, non-infringement, merchantability and
     fitness for a particular purpose) with respect to this information. Without
     limiting any of the foregoing, in no event shall any MSCI Party have any
     liability for any direct, indirect, special, incidental, punitive,
     consequential (including, without limitation, lost profits) or any other
     damages.

4 Pioneer International Equity Fund | Semiannual Report | 5/31/17


     returned 17.91%. During the same period, the average return of the 460
     mutual funds in Lipper's International Multi-Cap Core Funds category was
     16.88%, and the average return of the 772 mutual funds in Morningstar's
     Foreign Large Blend Funds category was 16.92%.

Q    How would you characterize the investment environment for international
     equities during the six-month period ended May 31, 2017?

A    With consumer confidence and corporate earnings improving, international
     equities enjoyed strong performance during the six-month period. Not only
     were earnings improving on a global scale, but for the first time in
     several years, international companies were experiencing more upward
     earnings revisions than U.S. companies, according to Bloomberg data. The
     market-friendly outcome in the French elections added to investor
     confidence in European equities. Against that backdrop, the Fund's
     benchmark, the MSCI EAFE Index, strongly outperformed U.S. stocks, as
     measured by the Standard & Poor's 500 Index, which returned 10.80% for the
     period.

     From a regional perspective, equities in developing and developed markets
     rallied, led by Europe (22.74%) and the emerging markets (17.51%). From a
     sector perspective, information technology (22.20%) and utilities (18.68%)
     were the strongest-performing sectors within the Fund's benchmark.
     Meanwhile, energy (-5.08%) was the only sector to post a negative return
     for the period.

Q    Which of your investment strategies or individual portfolio holdings
     contributed positively to the Fund's benchmark-relative performance during
     the six-month period ended May 31, 2017?

A    Stock selection in the information technology sector was rewarding for the
     Fund, especially in the semiconductor industry. Within semiconductors, the
     Fund's position in Tokyo Electron aided benchmark-relative returns. As one
     of the most respected companies manufacturing equipment for the production
     of semiconductor chips, Tokyo Electron saw strong demand for its products
     during the period. Chips are increasingly finding their way into new
     products and applications, from light bulbs and cars to industrial
     equipment, as companies increasingly turn to automation. With automation
     likely to remain pervasive across industries for the foreseeable future, we
     believe Tokyo Electron is in a favorable position to continue benefiting
     from heightened chip demand.

     The Fund's investments in the United Kingdom (U.K.), particularly in
     companies exposed to the domestic economy, enjoyed solid performance during
     the period. For example, our decision to increase the Fund's exposure to
     homebuilder company Persimmon during times of weakness leading up to the
     semiannual reporting period proved advantageous and benefited
     benchmark-relative performance. The U.K. housing market does

               Pioneer International Equity Fund | Semiannual Report | 5/31/17 5


     not have enough supply to meet the high demand, and we believe Persimmon is
     in a good position to expand its market share in the current environment.
     Finally, the Fund's position in Unilever, a maker of personal care and
     cleaning products, contributed to benchmark-relative performance. As with
     Persimmon, the company faced concerns about how last year's vote in favor
     of the U.K. leaving the European Union ("Brexit") would affect the
     country's trading relationship with its European partners. However, with a
     merger proposal from Kraft Heinz backed by Warren Buffett's Berkshire
     Hathaway, and with the economic growth outlook across Europe improving,
     investor interest in the stock rose during the period. Unilever's
     management ultimately rejected the Kraft Heinz bid, but the announcement
     piqued investor interest in the company and in management's efforts to
     build value for its shareholders.

Q    Which of your investment strategies or individual portfolio holdings
     detracted from the Fund's benchmark-relative performance during the
     six-month period ended May 31, 2017?

A    An out-of-benchmark position in Shire, a U.K. biotechnology company,
     contributed to the Fund's total returns but did not perform as well as the
     overall benchmark sector (health care) due to concerns about the company's
     potential acquisition of Radius Health. An agreement to acquire Radius
     Health was not reached during the period, but we remain confident in the
     efforts of Shire's management team to continue adding shareholder value
     either organically or through acquisitions.

     After a strong run-up prior to the six-month period, the Fund's investment
     in Daikin Industries, a global manufacturer of quiet and compact
     residential and commercial-grade air conditioners, lagged and detracted
     from benchmark-relative returns during the six months. Investor concerns
     that the strong Japanese yen would erode the company's profits drove
     Daikin's underperformance. We remain committed to the stock, however, as
     Daikin continues to benefit from increased demand from businesses as well
     as a rising middle class in the Pacific Rim.

     Finally, the Fund's investment in Schlumberger, an oil-and-gas equipment
     services company, struggled during the six-month period due to the
     oversupply of oil and the potential for reduced demand as alternative
     energy sources continue to be developed. With management's forward guidance
     suggesting that the current imbalance may affect Schlumberger's earnings in
     the second half of 2017 and into 2018, we subsequently sold the Fund's
     position before the end of the period.

6 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Q    Did you make any noteworthy shifts in the Fund's strategy or allocations
     during the six-month period ended May 31, 2017?

A    We did not make any notable shifts in the Fund's geographic and sector
     allocations. Prior to the reporting period, we had moved the portfolio to
     be more in line with the MSCI EAFE Index, adding undervalued European
     stocks that we believed offered more attractive growth potential, while
     reducing the Fund's exposure to Asian stocks. As part of that
     repositioning, we increased the Fund's exposure to European financial
     stocks, such as ING Group. As we have seen in recent years, European banks
     have strengthened their balance sheets and reduced the risk profiles of
     their assets. Accordingly, we believe European banks are generally better
     capitalized and are operating in a more efficient manner, thus positioning
     them to grow earnings after years of building up capital. The portfolio's
     increased exposure to European banks was beneficial for the Fund's
     performance during the six-month period, as financial stocks fared well.

     From a sector allocation perspective, the Fund had overweight exposures
     relative to the benchmark in the information technology and industrials
     sectors as of May 31, 2017, and had underweight exposures to
     telecommunication services and utilities stocks.

Q    Did the Fund have any derivative exposure during the six-month period ended
     May 31, 2017?

A    No, we did not invest the Fund in derivative securities during the period.

Q    What is your outlook for international equities for the balance of 2017?

A    We are more guarded than last year given the potential for reduced monetary
     stimulus from major global central banks, particularly the U.S. Federal
     Reserve. On the other hand, we may see more fiscal stimulus in the major
     developed economies. We believe corporate earnings are likely to accelerate
     into 2018, but risks to our outlook remain considerable. In particular, we
     believe current geopolitical risks are likely to persist through the end of
     the year, and perhaps beyond. These include risks related to the Brexit
     process in the U.K., and the potential for increased protectionism (altered
     trade agreements, tariffs, etc.). Thus, while we continue to be positive on
     the markets overall, we believe volatility is likely to remain elevated as
     investors respond to the political discourse on these and other fronts.

     As we look ahead, we believe Europe's nascent economic recovery will
     continue to offer interesting investment opportunities, and so will Japan,
     where stocks remain attractive given low valuations and changes in
     corporate governance. We will continue to closely follow those and other
     developments as we seek to identify companies with solid balance sheets and
     the potential to grow organically amid myriad crosscurrents.

               Pioneer International Equity Fund | Semiannual Report | 5/31/17 7


Please refer to the Schedule of Investments on pages 16-22 for a full listing of
Fund securities.

All investments are subject to risk, including the possible loss of principal.
In the past several years, financial markets have experienced increased
volatility, depressed valuations, decreased liquidity and heightened
uncertainty. These conditions may continue, recur, worsen or spread.

Investing in foreign and/or emerging markets securities involves risks relating
to interest rates, currency exchange rates, economic, and political conditions.

To the extent the Fund invests in issuers located within specific countries or
regions, the Fund may be particularly affected by adverse markets, rates, and
events, which may occur in those countries and regions.

When interest rates rise, the prices of fixed-income securities in the Fund will
generally fall. Conversely, when interest rates fall, the prices of fixed-income
securities in the Fund will generally rise.

At times, the Fund's investments may represent industries or industry sectors
that are interrelated or have common risks, making it more susceptible to any
economic, political, or regulatory developments or other risks affecting those
industries or sectors.

These risks may increase share price volatility.

Before investing, consider the product's investment objectives, risks, charges
and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for
a prospectus or summary prospectus containing this information. Read it
carefully.

Any information in this shareholder report regarding market or economic trends
or the factors influencing the Fund's historical or future performance are
statements of opinion as of the date of this report. Past performance is no
guarantee of future results.

8 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Portfolio Summary | 5/31/17

Sector Distribution
--------------------------------------------------------------------------------
(As a percentage of total long-term holdings)

[THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL]



                                                                        
Financials                                                                 20.1%
Consumer Staples                                                           13.7%
Industrials                                                                12.8%
Consumer Discretionary                                                     11.9%
Health Care                                                                 9.8%
Information Technology                                                      9.4%
Materials                                                                   7.1%
Real Estate                                                                 5.3%
Energy                                                                      4.5%
Telecommunication Services                                                  3.7%
Utilities                                                                   1.7%


Geographical Distribution
--------------------------------------------------------------------------------
(As a percentage of total long-term holdings based on a country of domicile)

[THE FOLLOWING DATA WAS REPRESENTED AS A BAR CHART IN THE PRINTED MATERIAL]



                                                                        
Japan                                                                      18.6%
France                                                                     15.7%
United Kingdom                                                             14.9%
Switzerland                                                                11.1%
Germany                                                                    10.9%
Ireland                                                                    10.1%
Netherlands                                                                 7.5%
United States                                                               1.9%
Australia                                                                   1.6%
Korea, Republic Of                                                          1.4%
Spain                                                                       1.4%
Sweden                                                                      1.4%
Taiwan, Province of China                                                   1.2%
Luxembourg                                                                  1.1%
Other (individually less than 1%)                                           1.2%


10 Largest Holdings
--------------------------------------------------------------------------------
(As a percentage of total long-term holdings)*



                                                                        
 1. Unilever NV                                                            2.30%
--------------------------------------------------------------------------------
 2. BNP Paribas SA                                                         2.22
--------------------------------------------------------------------------------
 3. Kerry Group Plc                                                        2.12
--------------------------------------------------------------------------------
 4. Siemens AG                                                             2.09
--------------------------------------------------------------------------------
 5. Schneider Electric SE                                                  2.09
--------------------------------------------------------------------------------
 6. BAE Systems Plc                                                        2.06
--------------------------------------------------------------------------------
 7. Kingspan Group Plc                                                     2.05
--------------------------------------------------------------------------------
 8. Roche Holding AG                                                       2.04
--------------------------------------------------------------------------------
 9. AXA SA                                                                 2.00
--------------------------------------------------------------------------------
10. Zurich Insurance Group AG                                              1.99
--------------------------------------------------------------------------------


*    This list excludes temporary cash investments. The portfolio is actively
     managed, and current holdings may be different. The holdings listed should
     not be considered recommendations to buy or sell any securities listed.

               Pioneer International Equity Fund | Semiannual Report | 5/31/17 9


Prices and Distributions | 5/31/17

Net Asset Value per Share
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                  Class                  5/31/17                 11/30/16
--------------------------------------------------------------------------------
                                                            
                    A                     $22.92                  $19.45
--------------------------------------------------------------------------------
                    C                     $20.03                  $16.95
--------------------------------------------------------------------------------
                    Y                     $22.94                  $19.50
--------------------------------------------------------------------------------


Distributions per Share: 12/1/16-5/31/17
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                                            Short-Term            Long-Term
         Class           Dividends         Capital Gains         Capital Gains
--------------------------------------------------------------------------------
                                                            
           A              $0.1762               $--                  $--
--------------------------------------------------------------------------------
           C              $0.0170               $--                  $--
--------------------------------------------------------------------------------
           Y              $0.2504               $--                  $--
--------------------------------------------------------------------------------


Index Definition
--------------------------------------------------------------------------------
The MSCI EAFE ND Index is an unmanaged, commonly used measure of international
stocks. Index returns are calculated monthly, assume reinvestment of dividends
and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It
is not possible to invest directly in an index.

The index defined here pertains to the "Value of $10,000 Investment" and "Value
of $5 Million Investment" charts on pages 11-13.

10 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Performance Update | 5/31/17                                      Class A Shares

Investment Returns
--------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Class A shares of Pioneer International Equity Fund at public
offering price during the periods shown, compared to that of the Morgan Stanley
Capital International (MSCI) Europe, Australasia and Far East (EAFE) ND Index.



Average Annual Total Returns
(As of May 31, 2017)
--------------------------------------------------------------------------------
             Net          Public      MSCI
             Asset        Offering    EAFE
             Value        Price       ND
Period       (NAV)        (POP)       Index
--------------------------------------------------------------------------------
                             
10 Years     -0.02%       -0.61%       1.06%
5 Years       9.58         8.28       10.21
1 Year       16.39         9.71       16.44
--------------------------------------------------------------------------------


Expense Ratio
(Per prospectus dated April 1, 2017)
--------------------------------------------------------------------------------
             Gross        Net
--------------------------------------------------------------------------------
                    
             1.68%        1.45%
--------------------------------------------------------------------------------


[THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL]

Value of $10,000 Investment



                    Pioneer International
                    Equity Fund                 MSCI EAFE ND Index
                                          
5/07                $9,425                      $10,000
5/08                $9,122                      $ 9,747
5/09                $5,839                      $ 6,179
5/10                $5,916                      $ 6,587
5/11                $7,542                      $ 8,590
5/12                $5,953                      $ 6,831
5/13                $7,625                      $ 8,990
5/14                $8,691                      $10,612
5/15                $8,955                      $10,561
5/16                $8,080                      $ 9,539
5/17                $9,404                      $11,107


Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end
performance results. Current performance may be lower or higher than the
performance data quoted.

The performance data quoted represents past performance, which is no guarantee
of future results. Investment return and principal value will fluctuate, and
shares, when redeemed, may be worth more or less than their original cost.

NAV results represent the percent change in net asset value per share. Returns
would have been lower had sales charges been reflected. POP returns reflect
deduction of maximum 5.75% sales charge. All results are historical and assume
the reinvestment of dividends and capital gains. Other share classes are
available for which performance and expenses will differ.

Performance results reflect any applicable expense waivers in effect during the
periods shown. Without such waivers Fund performance would be lower. Waivers may
not be in effect for all funds. Certain fee waivers are contractual through a
specified period. Otherwise, fee waivers can be rescinded at any time. See the
prospectus and financial statements for more information.

The net expense ratio reflects the contractual expense limitation currently in
effect through April 1, 2018, for Class A shares. There can be no assurance that
Amundi Pioneer will extend the expense limitation beyond such time. Please see
the prospectus and financial statements for more information.

The performance table and graph do not reflect the deduction of fees and taxes
that a shareowner would pay on Fund distributions or the redemption of Fund
shares.

Please refer to the financial highlights for a more current expense ratio.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 11


Performance Update | 5/31/17                                      Class C Shares

Investment Returns
--------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Class C shares of Pioneer International Equity Fund
during the periods shown, compared to that of the Morgan Stanley Capital
International (MSCI) Europe, Australasia and Far East (EAFE) ND Index.



Average Annual Total Returns
(As of May 31, 2017)
--------------------------------------------------------------------------------
                                      MSCI
                                      EAFE
             If           If          ND
Period       Held         Redeemed    Index
--------------------------------------------------------------------------------
                             
10 Years     -0.92%       -0.92%       1.06%
5 Years       8.59         8.59       10.21
1 Year       15.23        15.23       16.44
--------------------------------------------------------------------------------


Expense Ratio
(Per prospectus dated April 1, 2017)
--------------------------------------------------------------------------------
             Gross        Net
--------------------------------------------------------------------------------
                    
             2.37%        2.35%
--------------------------------------------------------------------------------


Value of $10,000 Investment



                    Pioneer International
                    Equity Fund                 MSCI EAFE ND Index
                                          
5/07                $10,000                     $10,000
5/08                $ 9,603                     $ 9,747
5/09                $ 6,085                     $ 6,179
5/10                $ 6,110                     $ 6,587
5/11                $ 7,720                     $ 8,590
5/12                $ 6,041                     $ 6,831
5/13                $ 7,668                     $ 8,990
5/14                $ 8,660                     $10,612
5/15                $ 8,843                     $10,561
5/16                $ 7,915                     $ 9,539
5/17                $ 9,120                     $11,107


Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end
performance results. Current performance may be lower or higher than the
performance data quoted.

The performance data quoted represents past performance, which is no guarantee
of future results. Investment return and principal value will fluctuate, and
shares, when redeemed, may be worth more or less than their original cost.

Class C shares held for less than one year are also subject to a 1% contingent
deferred sales charge (CDSC). "If Held" results represent the percent change in
net asset value per share. Returns would have been lower had sales charges been
reflected. All results are historical and assume the reinvestment of dividends
and capital gains. Other share classes are available for which performance and
expenses will differ.

Performance results reflect any applicable expense waivers in effect during the
periods shown. Without such waivers Fund performance would be lower. Waivers may
not be in effect for all funds. Certain fee waivers are contractual through a
specified period. Otherwise, fee waivers can be rescinded at any time. See the
prospectus and financial statements for more information.

The net expense ratio reflects the contractual expense limitation currently in
effect through April 1, 2018, for Class C shares. There can be no assurance that
Amundi Pioneer will extend the expense limitation beyond such time. Please see
the prospectus and financial statements for more information.

The performance table and graph do not reflect the deduction of fees and taxes
that a shareowner would pay on Fund distributions or the redemption of Fund
shares.

Please refer to the financial highlights for a more current expense ratio.

12 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Performance Update | 5/31/17                                      Class Y Shares

Investment Returns
--------------------------------------------------------------------------------

The mountain chart on the right shows the change in value of a $5 million
investment made in Class Y shares of Pioneer International Equity Fund during
the periods shown, compared to that of the Morgan Stanley Capital International
(MSCI) Europe, Australasia and Far East (EAFE) ND Index.



Average Annual Total Returns
(As of May 31, 2017)
--------------------------------------------------------------------------------
             Net          MSCI
             Asset        EAFE
             Value        ND
Period       (NAV)        Index
--------------------------------------------------------------------------------
                    
10 Years      0.32%        1.06%
5 Years      10.01        10.21
1 Year       16.75        16.44
--------------------------------------------------------------------------------


Expense Ratio
(Per prospectus dated April 1, 2017)
--------------------------------------------------------------------------------
             Gross
--------------------------------------------------------------------------------
          
             1.09%
--------------------------------------------------------------------------------


Value of $5 Million Investment



                Pioneer International
                Equity Fund                 MSCI EAFE ND Index
                                      
5/07            $5,000,000                  $5,000,000
5/08            $4,840,027                  $4,873,409
5/09            $3,101,431                  $3,089,342
5/10            $3,154,789                  $3,293,646
5/11            $4,041,881                  $4,295,148
5/12            $3,203,313                  $3,415,307
5/13            $4,119,560                  $4,495,134
5/14            $4,714,750                  $5,306,193
5/15            $4,876,736                  $5,280,710
5/16            $4,420,851                  $4,769,632
5/17            $5,161,537                  $5,553,589


Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end
performance results. Current performance may be lower or higher than the
performance data quoted. The performance data quoted represents past
performance, which is no guarantee of future results.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost.

Class Y shares were first publicly offered on April 16, 2009. Performance shown
for periods prior to the inception of Class Y shares on April 16, 2009, reflects
the NAV performance of the Fund's Class A shares. The performance does not
reflect differences in expenses, including the Rule 12b-1 fees applicable to
Class A shares. Since fees for Class A shares are generally higher than those of
Class Y shares, the performance for Class Y shares prior to their inception
would have been higher than the performance shown. For the period beginning
April 16, 2009, the actual performance of Class Y shares is reflected. Class Y
shares are not subject to sales charges and are available for limited groups of
eligible investors, including institutional investors. All results are
historical and assume the reinvestment of dividends and capital gains. Other
share classes are available for which performance and expenses will differ.

Performance results reflect any applicable expense waivers in effect during the
periods shown. Without such waivers Fund performance would be lower. Waivers may
not be in effect for all funds. Certain fee waivers are contractual through a
specified period. Otherwise, fee waivers can be rescinded at any time. See the
prospectus and financial statements for more information.

The performance table and graph do not reflect the deduction of fees and taxes
that a shareowner would pay on Fund distributions or the redemption of Fund
shares.

Please refer to the financial highlights for a more current expense ratio.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 13


Comparing Ongoing Fund Expenses

As a shareowner in the Fund, you incur two types of costs:

(1)  ongoing costs, including management fees, distribution and/or service
     (12b-1) fees, and other Fund expenses; and

(2)  transaction costs, including sales charges (loads) on purchase payments.

This example is intended to help you understand your ongoing expenses
(in dollars) of investing in the Fund and to compare these costs with the
ongoing costs of investing in other mutual funds. The example is based on an
investment of $1,000 at the beginning of the Fund's latest six-month period
and held throughout the six months.

Using the Tables
--------------------------------------------------------------------------------
Actual Expenses

The first table below provides information about actual account values and
actual expenses. You may use the information in this table, together with the
amount you invested, to estimate the expenses that you paid over the period as
follows:

(1)  Divide your account value by $1,000
     Example: an $8,600 account value (divided by) $1,000 = 8.6

(2)  Multiply the result in (1) above by the corresponding share class's number
     in the third row under the heading entitled "Expenses Paid During Period"
     to estimate the expenses you paid on your account during this period.

Expenses Paid on a $1,000 Investment in Pioneer International Equity Fund

Based on actual returns from December 1, 2016, through May 31, 2017.



---------------------------------------------------------------------------------
Share Class                               A                C                Y
---------------------------------------------------------------------------------
                                                               
Beginning Account                     $1,000.00        $1,000.00        $1,000.00
Value on 12/1/16
---------------------------------------------------------------------------------
Ending Account                        $1,188.40        $1,182.90        $1,191.50
Value (after expenses)
on 5/31/17
---------------------------------------------------------------------------------
Expenses Paid                         $    7.91        $   12.79        $    5.68
During Period*
---------------------------------------------------------------------------------


*    Expenses are equal to the Fund's annualized net expense ratio of 1.45%,
     2.35% and 1.04% for Class A, Class C and Class Y shares, respectively,
     multiplied by the average account value over the period, multiplied by
     182/365 (to reflect the one-half year period).

14 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Hypothetical Example for Comparison Purposes

The table below provides information about hypothetical account values and
hypothetical expenses based on the Fund's actual expense ratio and an assumed
rate of return of 5% per year before expenses, which is not the Fund's actual
return. The hypothetical account values and expenses may not be used to estimate
the actual ending account balance or expenses you paid for the period.

You may use this information to compare the ongoing costs of investing in the
Fund and other funds. To do so, compare this 5% hypothetical example with the 5%
hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the tables are meant to highlight your
ongoing costs only and do not reflect any transaction costs, such as sales
charges (loads), or redemption fees that are charged at the time of the
transaction. Therefore, the table below is useful in comparing ongoing costs
only and will not help you determine the relative total costs of owning
different funds. In addition, if these transaction costs were included, your
costs would have been higher.

Expenses Paid on a $1,000 Investment in Pioneer International Equity Fund

Based on a hypothetical 5% return per year before expenses, reflecting the
period from December 1, 2016, through May 31, 2017.



---------------------------------------------------------------------------------
Share Class                               A                C                Y
---------------------------------------------------------------------------------
                                                               
Beginning Account                     $1,000.00        $1,000.00        $1,000.00
Value on 12/1/16
---------------------------------------------------------------------------------
Ending Account                        $1,017.70        $1,013.21        $1,019.75
Value (after expenses)
on 5/31/17
---------------------------------------------------------------------------------
Expenses Paid                         $    7.29        $   11.80        $    5.24
During Period*
---------------------------------------------------------------------------------


*    Expenses are equal to the Fund's annualized net expense ratio of 1.45%,
     2.35% and 1.04% for Class A, Class C and Class Y shares, respectively,
     multiplied by the average account value over the period, multiplied by
     182/365 (to reflect the one-half year period).

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 15


Schedule of Investments | 5/31/17 (unaudited)



------------------------------------------------------------------------------------------
Shares                                                                       Value
------------------------------------------------------------------------------------------
                                                                       
                      COMMON STOCKS -- 98.4%
                      ENERGY -- 4.5%
                      Oil & Gas Equipment & Services -- 1.3%
           32,200     Schlumberger, Ltd.                                     $   2,240,798
------------------------------------------------------------------------------------------
                      Integrated Oil & Gas -- 3.2%
           95,300     Royal Dutch Shell Plc                                  $   2,593,684
           54,300     TOTAL SA                                                   2,893,810
                                                                             -------------
                                                                             $   5,487,494
                                                                             -------------
                      Total Energy                                           $   7,728,292
------------------------------------------------------------------------------------------
                      MATERIALS -- 7.1%
                      Diversified Chemicals -- 0.9%
           16,100     BASF SE                                                $   1,519,560
------------------------------------------------------------------------------------------
                      Specialty Chemicals -- 2.0%
           65,882     Croda International Plc                                $   3,369,859
------------------------------------------------------------------------------------------
                      Construction Materials -- 0.9%
           45,700     CRH Plc                                                $   1,647,895
------------------------------------------------------------------------------------------
                      Paper Packaging -- 3.3%
          242,300     Amcor, Ltd.                                            $   2,759,930
          103,000     Smurfit Kappa Group Plc                                    2,905,505
                                                                             -------------
                                                                             $   5,665,435
                                                                             -------------
                      Total Materials                                        $  12,202,749
------------------------------------------------------------------------------------------
                      CAPITAL GOODS -- 12.7%
                      Aerospace & Defense -- 2.0%
          407,600     BAE Systems Plc                                        $   3,500,736
------------------------------------------------------------------------------------------
                      Building Products -- 1.9%
           32,700     Daikin Industries, Ltd.                                $   3,213,358
------------------------------------------------------------------------------------------
                      Electrical Components & Equipment -- 3.7%
          110,900     ABB, Ltd.                                              $   2,795,416
           46,100     Schneider Electric SE                                      3,555,939
                                                                             -------------
                                                                             $   6,351,355
------------------------------------------------------------------------------------------
                      Heavy Electrical Equipment -- 1.3%
          165,700     Mitsubishi Electric Corp.                              $   2,291,032
------------------------------------------------------------------------------------------
                      Industrial Conglomerates -- 2.1%
           24,900     Siemens AG                                             $   3,558,118
------------------------------------------------------------------------------------------
                      Agricultural & Farm Machinery -- 1.7%
          184,000     Kubota Corp.                                           $   2,920,306
                                                                             -------------
                      Total Capital Goods                                    $  21,834,905
------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

16 Pioneer International Equity Fund | Semiannual Report | 5/31/17




------------------------------------------------------------------------------------------
Shares                                                                       Value
------------------------------------------------------------------------------------------
                                                                       
                      AUTOMOBILES & COMPONENTS -- 2.5%
                      Auto Parts & Equipment -- 2.5%
           81,800     NGK Spark Plug Co., Ltd.                               $   1,667,572
           37,600     Valeo SA                                                   2,623,376
                                                                             -------------
                                                                             $   4,290,948
                                                                             -------------
                      Total Automobiles & Components                         $   4,290,948
------------------------------------------------------------------------------------------
                      CONSUMER DURABLES & APPAREL -- 4.0%
                      Consumer Electronics -- 1.1%
          147,300     Panasonic Corp.                                        $   1,894,812
------------------------------------------------------------------------------------------
                      Homebuilding -- 2.9%
        1,225,368     Cairn Homes Plc                                        $   2,191,704
           87,100     Persimmon Plc                                              2,757,991
                                                                             -------------
                                                                             $   4,949,695
                                                                             -------------
                      Total Consumer Durables & Apparel                      $   6,844,507
------------------------------------------------------------------------------------------
                      CONSUMER SERVICES -- 2.9%
                      Hotels, Resorts & Cruise Lines -- 1.1%
           28,500     Carnival Plc                                           $   1,827,215
------------------------------------------------------------------------------------------
                      Restaurants -- 1.8%
           57,400     Whitbread Plc                                          $   3,176,288
                                                                             -------------
                      Total Consumer Services                                $   5,003,503
------------------------------------------------------------------------------------------
                      MEDIA -- 2.4%
                      Advertising -- 1.3%
           30,000     Publicis Groupe SA                                     $   2,300,912
------------------------------------------------------------------------------------------
                      Broadcasting -- 1.1%
          735,700     ITV Plc                                                $   1,856,441
                                                                             -------------
                      Total Media                                            $   4,157,353
------------------------------------------------------------------------------------------
                      FOOD & STAPLES RETAILING -- 2.6%
                      Drug Retail -- 1.4%
           62,800     Sundrug Co., Ltd.                                      $   2,449,147
------------------------------------------------------------------------------------------
                      Food Retail -- 1.2%
           49,200     Seven & I Holdings Co., Ltd.                           $   2,096,438
                                                                             -------------
                      Total Food & Staples Retailing                         $   4,545,585
------------------------------------------------------------------------------------------
                      FOOD, BEVERAGE & TOBACCO -- 5.4%
                      Packaged Foods & Meats -- 5.4%
           41,500     Danone SA                                              $   3,084,747
           41,100     Kerry Group Plc                                            3,606,376
           29,600     Nestle SA                                                  2,529,613
                                                                             -------------
                                                                             $   9,220,736
                                                                             -------------
                      Total Food, Beverage & Tobacco                         $   9,220,736
------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 17


Schedule of Investments | 5/31/17 (unaudited) (continued)



------------------------------------------------------------------------------------------
Shares                                                                       Value
------------------------------------------------------------------------------------------
                                                                       
                      HOUSEHOLD & PERSONAL PRODUCTS -- 5.6%
                      Household Products -- 1.5%
           20,900     Henkel AG & Co. KGaA                                   $   2,598,804
------------------------------------------------------------------------------------------
                      Personal Products -- 4.1%
           14,400     L'Oreal SA                                             $   3,085,072
           68,400     Unilever NV                                                3,900,443
                                                                             -------------
                                                                             $   6,985,515
                                                                             -------------
                      Total Household & Personal Products                    $   9,584,319
------------------------------------------------------------------------------------------
                      HEALTH CARE EQUIPMENT & SERVICES -- 3.5%
                      Health Care Supplies -- 1.9%
           67,600     Hoya Corp.                                             $   3,339,770
------------------------------------------------------------------------------------------
                      Health Care Services -- 1.6%
           31,200     Fresenius SE & Co. KGaA                                $   2,674,977
                                                                             -------------
                      Total Health Care Equipment & Services                 $   6,014,747
------------------------------------------------------------------------------------------
                      PHARMACEUTICALS, BIOTECHNOLOGY & LIFE
                      SCIENCES -- 6.2%
                      Biotechnology -- 1.6%
           47,700     Shire Plc                                              $   2,749,069
------------------------------------------------------------------------------------------
                      Pharmaceuticals -- 3.6%
           33,800     Novartis AG                                            $   2,769,224
           12,606     Roche Holding AG                                           3,467,957
                                                                             -------------
                                                                             $   6,237,181
------------------------------------------------------------------------------------------
                      Life Sciences Tools & Services -- 1.0%
           19,600     Gerresheimer AG                                        $   1,681,017
                                                                             -------------
                      Total Pharmaceuticals, Biotechnology & Life Sciences   $  10,667,267
------------------------------------------------------------------------------------------
                      BANKS -- 7.6%
                      Diversified Banks -- 7.6%
          523,800     Aldermore Group Plc                                    $   1,646,240
          836,700     Barclays Plc                                               2,260,531
           53,300     BNP Paribas SA                                             3,771,981
          178,400     ING Groep NV                                               2,984,003
          102,000     Swedbank AB                                                2,460,489
                                                                             -------------
                                                                             $  13,123,244
                                                                             -------------
                      Total Banks                                            $  13,123,244
------------------------------------------------------------------------------------------
                      DIVERSIFIED FINANCIALS -- 5.2%
                      Other Diversified Financial Services -- 2.0%
          100,800     Kingspan Group Plc                                     $   3,489,752
------------------------------------------------------------------------------------------
                      Diversified Capital Markets -- 1.2%
          130,000     UBS Group AG                                           $   2,070,521
------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

18 Pioneer International Equity Fund | Semiannual Report | 5/31/17




------------------------------------------------------------------------------------------
Shares                                                                       Value
------------------------------------------------------------------------------------------
                                                                       
                      Specialized Finance -- 2.0%
           63,600     Euronext NV                                            $   3,335,016
                                                                             -------------
                      Total Diversified Financials                           $   8,895,289
------------------------------------------------------------------------------------------
                      INSURANCE -- 5.0%
                      Multi-line Insurance -- 5.0%
            8,900     Allianz SE*                                            $   1,711,121
          127,300     AXA SA                                                     3,403,387
           11,500     Zurich Insurance Group AG                                  3,385,601
                                                                             -------------
                                                                             $   8,500,109
                                                                             -------------
                      Total Insurance                                        $   8,500,109
------------------------------------------------------------------------------------------
                      REAL ESTATE -- 6.8%
                      Diversified REIT -- 1.5%
        1,665,215     Hibernia Real Estate Investment Trust Plc*             $   2,612,760
------------------------------------------------------------------------------------------
                      Diversified REIT -- 1.9%
          507,700     Hibernia Real Estate Investment Trust Plc*             $     793,697
          189,000     Merlin Properties Socimi SA                                2,400,040
                                                                             -------------
                                                                             $   3,193,737
------------------------------------------------------------------------------------------
                      Real Estate Operating Companies -- 3.4%
           91,200     Grand City Properties SA                               $   1,891,903
          555,900     Ichigo, Inc.                                               1,605,340
           59,299     Vonovia SE*                                                2,332,727
                                                                             -------------
                                                                             $   5,829,970
                                                                             -------------
                      Total Real Estate                                      $  11,636,467
------------------------------------------------------------------------------------------
                      SOFTWARE & SERVICES -- 1.8%
                      IT Consulting & Other Services -- 0.7%
           94,418     HCL Technologies, Ltd.                                 $   1,258,864
------------------------------------------------------------------------------------------
                      Application Software -- 1.1%
           20,000     Temenos Group AG                                       $   1,862,809
                                                                             -------------
                      Total Software & Services                              $   3,121,673
------------------------------------------------------------------------------------------
                      TECHNOLOGY HARDWARE & EQUIPMENT -- 3.1%
                      Computer Hardware Storage & Peripherals -- 1.4%
            1,200     Samsung Electronics Co., Ltd.                          $   2,389,287
------------------------------------------------------------------------------------------
                      Electronic Equipment Manufacturers -- 1.7%
            6,400     Keyence Corp.                                          $   2,915,814
                                                                             -------------
                      Total Technology Hardware & Equipment                  $   5,305,101
------------------------------------------------------------------------------------------
                      SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 4.5%
                      Semiconductor Equipment -- 1.8%
           21,200     Tokyo Electron, Ltd.                                   $   3,013,910
------------------------------------------------------------------------------------------


The accompanying notes are an integral part of these financial statements.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 19


Schedule of Investments | 5/31/17 (unaudited) (continued)



------------------------------------------------------------------------------------------
Shares                                                                       Value
------------------------------------------------------------------------------------------
                                                                       
                      Semiconductors -- 2.7%
          116,200     Infineon Technologies AG                               $   2,575,481
          306,000     Taiwan Semiconductor Manufacturing Co., Ltd.               2,054,680
                                                                             -------------
                                                                             $   4,630,161
                                                                             -------------
                      Total Semiconductors & Semiconductor Equipment         $   7,644,071
------------------------------------------------------------------------------------------
                      TELECOMMUNICATION SERVICES -- 3.7%
                      Integrated Telecommunication Services -- 2.5%
           46,500     Nippon Telegraph & Telephone Corp.                     $   2,234,101
          119,100     Orange SA                                                  2,096,483
                                                                             -------------
                                                                             $   4,330,584
------------------------------------------------------------------------------------------
                      Wireless Telecommunication Services -- 1.2%
           71,700     KDDI Corp.                                             $   1,989,641
                                                                             -------------
                      Total Telecommunication Services                       $   6,320,225
------------------------------------------------------------------------------------------
                      UTILITIES -- 1.3%
                      Electric Utilities -- 1.3%
          112,600     SSE Plc                                                $   2,184,753
                                                                             -------------
                      Total Utilities                                        $   2,184,753
------------------------------------------------------------------------------------------
                      TOTAL COMMON STOCKS
                      (Cost $142,239,887)                                    $ 168,825,843
------------------------------------------------------------------------------------------


------------------------------------------------------------------------------------------
Principal
Amount ($)
------------------------------------------------------------------------------------------
                                                                       
                      U.S. GOVERNMENT AND AGENCY
                      OBLIGATIONS -- 0.6%
          430,000     U.S. Treasury Bill, 7/6/17 (c)                         $     429,689
          600,000     U.S. Treasury Bill, 6/8/17 (c)                               599,921
                                                                             -------------
                                                                             $   1,029,610
------------------------------------------------------------------------------------------
                      TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS
                      (Cost $1,029,615)                                      $   1,029,610
------------------------------------------------------------------------------------------
                      TOTAL INVESTMENT IN SECURITIES -- 99.0%
                      (Cost $143,269,502) (a)                                $ 169,855,453
------------------------------------------------------------------------------------------
                      OTHER ASSETS & LIABILITIES -- 1.0%                     $   1,764,245
------------------------------------------------------------------------------------------
                      TOTAL NET ASSETS -- 100.0%                             $ 171,619,698
==========================================================================================


*         Non-income producing security.

(A.D.R.)  American Depositary Receipts.

REIT      Real Estate Investment Trust.

The accompanying notes are an integral part of these financial statements.

20 Pioneer International Equity Fund | Semiannual Report | 5/31/17


(a)       At May 31, 2017, the net unrealized appreciation on investments based
          on cost for federal income tax purposes of $144,247,100 was as
          follows:



                                                                                    
          Aggregate gross unrealized appreciation for all investments in which
            there is an excess of value over tax cost                                  $34,476,123

          Aggregate gross unrealized depreciation for all investments in which
            there is an excess of tax cost over value                                   (8,867,770)
                                                                                       -----------
          Net unrealized appreciation                                                  $25,608,353
                                                                                       ===========


(b)       Distributions of investments by country of domicile (excluding
          temporary cash investments) as a percentage of total investment in
          securities, is as follows:



                                                                        
          Japan                                                            18.6%
          France                                                           15.7
          United Kingdom                                                   14.9
          Switzerland                                                      11.1
          Germany                                                          10.9
          Ireland                                                          10.1
          Netherlands                                                       7.5
          United States                                                     1.9
          Australia                                                         1.6
          Korea, Republic Of                                                1.4
          Spain                                                             1.4
          Sweden                                                            1.4
          Taiwan, Province Of China                                         1.2
          Luxembourg                                                        1.1
          Other (individually less than 1%)                                 1.2
                                                                          -----
                                                                          100.0%
                                                                          =====


(c)       Security issued with a zero coupon. Income is earned through accretion
          of discount.

Purchases and sales of securities (excluding temporary cash investments) for the
six months ended May 31, 2017, aggregated $22,267,488 and $29,031,218,
respectively.

The Fund is permitted to engage in purchase and sale transactions ("cross
trades") with certain Funds and accounts for which Amundi Pioneer Asset
Management, Inc., (Amundi Pioneer) formerly Pioneer Investment Management, Inc.
(PIM), serves as the Fund's investment adviser, as set forth in Rule 17a-7 under
the Investment Company Act of 1940, pursuant to procedures adopted by the Board
of Trustees. Under these procedures, cross trades are effected at current market
prices. During the six months ended May 31, 2017, the Fund did not engage in
cross trade activity.

Various inputs are used in determining the value of the Fund's investments.
These inputs are summarized in the three broad levels listed below.

      Level 1 - quoted prices in active markets for identical securities.

      Level 2 - other significant observable inputs (including quoted prices for
                similar securities, interest rates, prepayment speeds, credit
                risk, etc.) See Notes to Financial Statements -- Note 1A.

      Level 3 - significant unobservable inputs (including the Fund's own
                assumptions in determining fair value of investments) See Notes
                to Financial Statements -- Note 1A.

The accompanying notes are an integral part of these financial statements.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 21


Schedule of Investments | 5/31/17 (unaudited) (continued)

The following is a summary of the inputs used as of May 31, 2017, in valuing the
Fund's investments:



---------------------------------------------------------------------------------------
                                Level 1       Level 2          Level 3     Total
---------------------------------------------------------------------------------------
                                                               
Common Stocks
    Energy
      Oil & Gas Equipment
          & Services            $2,240,798    $          --    $--         $  2,240,798
All Other Common Stocks*                --      166,585,045     --          166,585,045
U.S. Government and
    Agency Obligations                  --        1,029,610     --            1,029,610
---------------------------------------------------------------------------------------
Total                           $2,240,798    $ 167,614,655    $--         $169,855,453
=======================================================================================


*    Level 2 securities are valued using inputs/data furnished by independent
     pricing services using fair value factors.

During the six months ended May 31, 2017, there were no transfers between Levels
1, 2 and 3.

The accompanying notes are an integral part of these financial statements.

22 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Statement of Assets and Liabilities | 5/31/17 (unaudited)



                                                               
ASSETS:
  Investment in securities (cost $143,269,502)                    $ 169,855,453
  Cash                                                                  852,854
  Foreign currencies, at value (cost $98,240)                            98,641
  Receivables --
     Fund shares sold                                                    64,744
     Dividends and foreign taxes withheld                             1,260,699
  Due from Amundi Pioneer Asset Management, Inc., formerly
     Pioneer Investment Management, Inc.                                  4,011
  Other assets                                                           26,546
--------------------------------------------------------------------------------
         Total assets                                             $ 172,162,948
================================================================================
LIABILITIES:
  Payables --
     Fund shares repurchased                                      $     215,938
     Distributions                                                           93
     Trustee fees                                                         1,144
     Transfer agent fees                                                 69,105
     Registration fees                                                   45,993
     Audit fees                                                          19,343
  Due to affiliates                                                     169,209
  Accrued expenses                                                       22,425
--------------------------------------------------------------------------------
         Total liabilities                                        $     543,250
================================================================================
NET ASSETS:
  Paid-in capital                                                 $ 262,099,701
  Undistributed net investment income                                   841,657
  Accumulated net realized loss on investments and foreign
     currency transactions                                         (117,869,241)
  Net unrealized appreciation on investments                         26,585,951
  Net unrealized depreciation on other assets and
     liabilities denominated in foreign currencies                      (38,370)
--------------------------------------------------------------------------------
         Net assets                                               $ 171,619,698
================================================================================
NET ASSET VALUE PER SHARE:
(No par value, unlimited number of shares authorized)
  Class A (based on $74,760,250/3,261,980 shares)                 $       22.92
  Class C (based on $10,449,549/521,566 shares)                   $       20.03
  Class Y (based on $86,409,899/3,767,597 shares)                 $       22.94
MAXIMUM OFFERING PRICE:
  Class A ($22.92 (divided by) 94.25%)                            $       24.32
================================================================================


The accompanying notes are an integral part of these financial statements.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 23


Statement of Operations (unaudited)

For the Six Months Ended 5/31/17



                                                                            
INVESTMENT INCOME:
   Dividends (net of foreign taxes withheld of $302,569)            $ 2,861,013
   Interest                                                               4,424
----------------------------------------------------------------------------------------------
        Total investment income                                                   $ 2,865,437
----------------------------------------------------------------------------------------------
EXPENSES:
   Management fees                                                  $   671,948
   Transfer agent fees
     Class A                                                             67,415
     Class C                                                              9,463
     Class Y                                                              1,130
   Distribution fees
     Class A                                                             86,471
     Class C                                                             49,821
   Shareholder communications expense                                    57,495
   Administrative expense                                                48,993
   Custodian fees                                                        18,639
   Registration fees                                                     27,420
   Professional fees                                                     21,839
   Printing expense                                                       5,573
   Fees and expenses of nonaffiliated Trustees                            3,459
   Miscellaneous                                                         23,171
----------------------------------------------------------------------------------------------
     Total expenses                                                               $ 1,092,837
     Less fees waived and expenses reimbursed
        by Amundi Pioneer Asset Management, Inc., (Amundi Pioneer)
        formerly Pioneer Investment Management, Inc. (PIM)                            (62,743)
----------------------------------------------------------------------------------------------
     Net expenses                                                                 $ 1,030,094
----------------------------------------------------------------------------------------------
        Net investment income                                                     $ 1,835,343
----------------------------------------------------------------------------------------------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS,
AND FOREIGN CURRENCY TRANSACTIONS:
   Net realized gain (loss) on:
     Investments                                                    $ 2,816,698
     Other assets and liabilities denominated in
        foreign currencies                                              (41,955)  $ 2,774,743
----------------------------------------------------------------------------------------------
   Change in net unrealized appreciation (depreciation) on:
     Investments                                                    $23,073,406
     Other assets and liabilities denominated in
        foreign currencies                                               49,240   $23,122,646
----------------------------------------------------------------------------------------------
   Net realized and unrealized gain (loss) on investments
     and foreign currency transactions                                            $25,897,389
----------------------------------------------------------------------------------------------
   Net increase in net assets resulting from operations                           $27,732,732
==============================================================================================


The accompanying notes are an integral part of these financial statements.

24 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Statements of Changes in Net Assets



------------------------------------------------------------------------------------------
                                                             Six Months
                                                             Ended
                                                             5/31/17        Year Ended
                                                             (unaudited)    11/30/16
------------------------------------------------------------------------------------------
                                                                      
FROM OPERATIONS:
Net investment income                                        $  1,835,343   $   1,905,984
Net realized gain (loss) on investments, futures contracts,
  and foreign currency transactions                             2,774,743     (10,202,926)
Change in net unrealized appreciation (depreciation)
  on investments, futures contracts
  and foreign currency transactions                            23,122,646         490,254
------------------------------------------------------------------------------------------
      Net increase (decrease) in net assets resulting
         from operations                                     $ 27,732,732   $  (7,806,688)
------------------------------------------------------------------------------------------
DISTRIBUTIONS TO SHAREOWNERS:
Net investment income:
      Class A ($0.18 and $0.33 per share, respectively)      $   (590,165)  $  (1,211,983)
      Class C ($0.02 and $0.19 per share, respectively)            (9,746)       (125,805)
      Class Y ($0.25 and $0.42 per share, respectively)          (956,462)     (1,712,039)
------------------------------------------------------------------------------------------
         Total distributions to shareowners                  $ (1,556,373)  $  (3,049,827)
------------------------------------------------------------------------------------------
FROM FUND SHARE TRANSACTIONS:
Net proceeds from sale of shares                             $  5,761,062   $   6,785,651
Reinvestment of distributions                                     585,065       1,332,456
Cost of shares repurchased                                    (11,023,101)    (21,251,717)
------------------------------------------------------------------------------------------
      Net decrease in net assets resulting from
         Fund share transactions                             $ (4,676,974)  $ (13,133,610)
------------------------------------------------------------------------------------------
      Net increase (decrease) in net assets                  $ 21,499,385   $ (23,990,125)
NET ASSETS:
Beginning of period                                          $150,120,313   $ 174,110,438
------------------------------------------------------------------------------------------
End of period                                                $171,619,698   $ 150,120,313
------------------------------------------------------------------------------------------
Undistributed net investment income                          $    841,657   $     562,687
==========================================================================================


The accompanying notes are an integral part of these financial statements.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 25


Statements of Changes in Net Assets (continued)



---------------------------------------------------------------------------------------
                                Six Months   Six Months
                                Ended        Ended
                                5/31/17      5/31/17         Year Ended   Year Ended
                                Shares       Amount          11/30/16     11/30/16
                                (unaudited)  (unaudited)     Shares       Amount
---------------------------------------------------------------------------------------
                                                              
Class A
Shares sold                      178,400     $  3,727,016     211,512     $  4,111,213
Reinvestment of distributions     28,800          563,041      57,160        1,153,475
Less shares repurchased         (330,024)      (6,854,494)   (605,069)     (11,814,805)
---------------------------------------------------------------------------------------
      Net decrease              (122,824)    $ (2,564,437)   (336,397)    $ (6,550,117)
=======================================================================================
Class C
Shares sold                       76,709     $  1,418,382      80,672     $  1,374,118
Reinvestment of distributions        534            9,169       6,660          118,087
Less shares repurchased         (135,644)      (2,492,951)   (168,136)      (2,860,729)
---------------------------------------------------------------------------------------
      Net decrease               (58,401)    $ (1,065,400)    (80,804)    $ (1,368,524)
=======================================================================================
Class Y
Shares sold                       28,807     $    615,664      65,581     $  1,300,320
Reinvestment of distributions        658           12,855       3,021           60,894
Less shares repurchased          (79,582)      (1,675,656)   (333,726)      (6,576,183)
---------------------------------------------------------------------------------------
      Net decrease               (50,117)    $ (1,047,137)   (265,124)    $ (5,214,969)
=======================================================================================


The accompanying notes are an integral part of these financial statements.

26 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Financial Highlights



------------------------------------------------------------------------------------------------------------------------------------
                                                                  Six Months
                                                                  Ended        Year        Year        Year      Year      Year
                                                                  5/31/17      Ended       Ended       Ended     Ended     Ended
                                                                  (unaudited)  11/30/16    11/30/15    11/30/14  11/30/13  11/30/12
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                         
Class A
Net asset value, beginning of period                              $ 19.45      $ 20.74     $ 22.34     $ 22.49   $ 18.67   $ 17.99
------------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                                   $  0.23(a)   $  0.21(a)  $  0.16(a)  $  0.63   $  0.27   $  0.36
   Net realized and unrealized gain (loss) on investments            3.42        (1.17)      (0.53)      (0.28)     3.87      0.58
------------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations                $  3.65      $ (0.96)    $ (0.37)    $  0.35   $  4.14   $  0.94
------------------------------------------------------------------------------------------------------------------------------------
Distribution to shareowners:
   Net investment income                                          $ (0.18)     $ (0.33)    $ (1.23)    $ (0.50)  $ (0.32)  $ (0.26)
------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                               $ (0.18)     $ (0.33)    $ (1.23)    $ (0.50)  $ (0.32)  $ (0.26)
------------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                        $  3.47      $ (1.29)    $ (1.60)    $ (0.15)  $  3.82   $  0.68
------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                    $ 22.92      $ 19.45     $ 20.74     $ 22.34   $ 22.49   $ 18.67
====================================================================================================================================
Total return*                                                       18.84%       (4.70)%     (1.69)%      1.55%    22.50%     5.38%
Ratio of net expenses to average net assets (b)                      1.45%**      1.45%       1.45%       1.46%     1.45%     1.45%
Ratio of net investment income (loss) to average net assets          2.17%**      1.10%       0.73%       2.72%     1.26%     1.89%
Portfolio turnover rate                                                29%**        41%         49%        100%      101%       61%
Net assets, end of period (in thousands)                          $74,760      $65,844     $77,173     $83,544   $86,602   $75,784
Ratios with no waiver of fees and assumption of expenses by
   Amundi Pioneer formerly PIM, and no reduction for fees paid
     indirectly:
   Total expenses to average net assets (b)                          1.63%**      1.68%       1.71%       1.70%     1.69%     1.82%
   Net investment income (loss) to average net assets                1.99%**      0.87%       0.47%       2.48%     1.02%     1.53%
====================================================================================================================================


*    Assumes initial investment at net asset value at the beginning of each
     period, reinvestment of all distributions, the complete redemption of the
     investment at net asset value at the end of each period and no sales
     charges. Total return would be reduced if sales charges were taken into
     account.

**   Annualized.

(a)  The per-share data presented above is based on the average shares
     outstanding for the period presented.

(b)  Includes interest expense of 0.00%, 0.00%, 0.00%, 0.01%, 0.00% and 0.00%,
     respectively.

The accompanying notes are an integral part of these financial statements.

Pioneer International Equity Fund | Semiannual Report | 5/31/17 27


Financial Highlights (continued)



----------------------------------------------------------------------------------------------------------------------------------
                                                             Six Months
                                                             Ended         Year        Year         Year      Year      Year
                                                             5/31/17       Ended       Ended        Ended     Ended     Ended
                                                             (unaudited)   11/30/16    11/30/15     11/30/14  11/30/13  11/30/12
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
Class C
Net asset value, beginning of period                         $ 16.95       $ 18.13     $ 19.69      $ 19.91   $ 16.57   $ 15.97
----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                              $  0.11(a)    $  0.03(a)  $ (0.04)(a)  $  0.35   $  0.08   $  0.18
   Net realized and unrealized gain (loss) on investments       2.99         (1.02)      (0.46)       (0.23)     3.44      0.53
----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations           $  3.10       $ (0.99)    $ (0.50)     $  0.12   $  3.52   $  0.71
----------------------------------------------------------------------------------------------------------------------------------
Distribution to shareowners:
   Net investment income                                     $ (0.02)      $ (0.19)    $ (1.06)     $ (0.34)  $ (0.18)  $ (0.11)
----------------------------------------------------------------------------------------------------------------------------------
Total distributions                                          $ (0.02)      $ (0.19)    $ (1.06)     $ (0.34)  $ (0.18)  $ (0.11)
----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                   $  3.08       $ (1.18)    $ (1.56)     $ (0.22)  $  3.34   $  0.60
----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                               $ 20.03       $ 16.95     $ 18.13      $ 19.69   $ 19.91   $ 16.57
==================================================================================================================================
Total return*                                                  18.29%        (5.50)%     (2.58)%       0.60%    21.43%     4.48%
Ratio of net expenses to average net assets (b)                 2.35%**       2.35%       2.35%        2.36%     2.35%     2.35%
Ratio of net investment income (loss) to average net assets     1.24%**       0.20%      (0.20)%       1.78%     0.36%     0.99%
Portfolio turnover rate                                           29%**         41%         49%         100%      101%       61%
Net assets, end of period (in thousands)                     $10,450       $ 9,829     $11,981      $10,865   $10,826   $ 9,910
Ratios with no waiver of fees and assumption of expenses by
   Amundi Pioneer formerly PIM, and no reduction for fees
      paid indirectly:
   Total expenses to average net assets (b)                     2.36%**       2.37%       2.42%        2.44%     2.41%     2.63%
   Net investment income (loss) to average net assets           1.23%**       0.18%      (0.27)%       1.70%     0.30%     0.71%
==================================================================================================================================


*    Assumes initial investment at net asset value at the beginning of each
     period, reinvestment of all distributions, the complete redemption of the
     investment at net asset value at the end of each period and no sales
     charges. Total return would be reduced if sales charges were taken into
     account.

**   Annualized.

(a)  The per-share data presented above is based on the average shares
     outstanding for the period presented.

(b)  Includes interest expense of 0.00%, 0.00%, 0.00%, 0.01%, 0.00% and 0.00%,
     respectively.

The accompanying notes are an integral part of these financial statements.

28 Pioneer International Equity Fund | Semiannual Report | 5/31/17




----------------------------------------------------------------------------------------------------------------------------------
                                                             Six Months
                                                             Ended         Year        Year        Year       Year       Year
                                                             5/31/17       Ended       Ended       Ended      Ended      Ended
                                                             (unaudited)   11/30/16    11/30/15    11/30/14   11/30/13   11/30/12
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                       
Class Y
Net asset value, beginning of period                         $ 19.50       $ 20.81     $ 22.41     $  22.56   $  18.73   $  18.07
----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                              $  0.27(a)    $  0.28(a)  $  0.25(a)  $   1.29   $   0.37   $   0.41
   Net realized and unrealized gain (loss) on investments       3.42         (1.17)      (0.54)       (0.85)      3.87       0.60
----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations           $  3.69       $ (0.89)    $ (0.29)    $   0.44   $   4.24   $   1.01
----------------------------------------------------------------------------------------------------------------------------------
Distribution to shareowners:
   Net investment income                                     $ (0.25)      $ (0.42)    $ (1.31)    $  (0.59)  $  (0.41)  $  (0.35)
----------------------------------------------------------------------------------------------------------------------------------
Total distributions                                          $ (0.25)      $ (0.42)    $ (1.31)    $  (0.59)  $  (0.41)  $  (0.35)
----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                   $  3.44       $ (1.31)    $ (1.60)    $  (0.15)  $   3.83   $   0.66
----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                               $ 22.94       $ 19.50     $ 20.81     $  22.41   $  22.56   $  18.73
==================================================================================================================================
Total return*                                                  19.15%        (4.34)%     (1.29)%       1.94%     23.02%      5.79%
Ratio of net expenses to average net assets (b)                 1.04%**       1.09%       1.04%        1.06%      1.04%      1.01%
Ratio of net investment income (loss) to average net assets     2.59%**       1.45%       1.16%        3.89%      1.69%      2.35%
Portfolio turnover rate                                           29%**         41%         49%         100%       101%        61%
Net assets, end of period (in thousands)                     $86,410       $74,448     $84,957     $102,563   $224,523   $216,217
==================================================================================================================================


*    Assumes initial investment at net asset value at the beginning of each
     period, reinvestment of all distributions and the complete redemption of
     the investment at net asset value at the end of each period.

**   Annualized.

(a)  The per-share data presented above is based on the average shares
     outstanding for the period presented.

(b)  Includes interest expense of 0.00%, 0.00%, 0.00%, 0.01%, 0.00% and 0.00%,
     respectively.

The accompanying notes are an integral part of these financial statements.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 29


Notes to Financial Statements | 5/31/17 (unaudited)

1. Organization and Significant Accounting Policies

Pioneer International Equity Fund (formerly Pioneer International Value Fund)
(the Fund) is the sole portfolio comprising Pioneer Series Trust VIII, a
Delaware statutory trust. The Fund is registered under the Investment Company
Act of 1940 as a diversified, open-end management investment company. The
investment objective of the Fund is long-term growth of capital.

The Fund offered three classes of shares designated as Class A, Class C and
Class Y shares. Each class of shares represents an interest in the same
portfolio of investments of the Fund and has identical rights (based on relative
net asset values) to assets and liquidation proceeds. Share classes can bear
different rates of class-specific fees and expenses such as transfer agent and
distribution fees. Differences in class-specific fees and expenses will result
in differences in net investment income and, therefore, the payment of different
dividends from net investment income earned by each class. The Amended and
Restated Declaration of Trust of the Fund gives the Board of Trustees the
flexibility to specify either per-share voting or dollar-weighted voting when
submitting matters for shareholder approval. Under per-share voting, each share
of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a
shareholder's voting power is determined not by the number of shares owned, but
by the dollar value of the shares on the record date. Each share class has
exclusive voting rights with respect to matters affecting only that class,
including with respect to the distribution plan for that class. There is no
distribution plan for Class Y shares.

On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset
management companies located throughout the world. Amundi, one of the world's
largest asset managers, is headquartered in Paris, France. As a result of the
transaction, Pioneer Investment Management, Inc., the Fund's investment adviser,
became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned
subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was
owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of
UniCredit S.p.A.

In connection with the transaction, the names of the Fund's investment adviser
and principal underwriter changed. Effective July 3, 2017, the name of Pioneer
Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and
the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer
Distributor, Inc.

The Fund's financial statements have been prepared in conformity with U.S.
generally accepted accounting principles (U.S. GAAP) that require the management
of the Fund to make estimates and assumptions that affect the

30 Pioneer International Equity Fund | Semiannual Report | 5/31/17


reported amounts of assets and liabilities, the disclosure of contingent assets
and liabilities at the date of the financial statements, and the reported
amounts of income, expenses and gain or loss on investments during the reporting
period. Actual results could differ from those estimates.

The Fund is an investment company and follows investment company accounting and
reporting guidance under U.S. GAAP. The following is a summary of significant
accounting policies followed by the Fund in the preparation of its financial
statements:

A.   Security Valuation

     The net asset value of the Fund is computed once daily, on each day the New
     York Stock Exchange (NYSE) is open, as of the close of regular trading on
     the NYSE.

     Equity securities that have traded on an exchange are valued by using the
     last sale price on the principal exchange where they are traded. Equity
     securities that have not traded on the date of valuation, or securities for
     which sale prices are not available, generally are valued using the mean
     between the last bid and asked prices or, if both last bid and asked prices
     are not available, at the last quoted bid price. Last sale and bid and
     asked prices are provided by independent third party pricing services. In
     the case of equity securities not traded on an exchange, prices are
     typically determined by independent third party pricing services using a
     variety of techniques and methods.

     The principal exchanges and markets for non-U.S. equity securities have
     closing times prior to the close of the NYSE. However, the value of these
     securities may be influenced by changes in global markets occurring after
     the closing times of the local exchanges and markets up to the time the
     Fund determines its net asset value. Consequently, the Fund uses a fair
     value model developed by an independent pricing service to value non-U.S.
     equity securities. On a daily basis, the pricing service recommends
     changes, based on a proprietary model, to the closing market prices of each
     non-U.S. security held by the Fund to reflect the security's fair value at
     the time the Fund determines its net asset value. The Fund applies these
     recommendations in accordance with procedures approved by the Board of
     Trustees.

     Securities for which independent pricing services or broker-dealers are
     unable to supply prices or for which market prices and/or quotations are
     not readily available or are considered to be unreliable are valued by a
     fair valuation team comprised of certain personnel of Amundi Pioneer Asset
     Management, Inc., (Amundi Pioneer), formerly Pioneer Investment Management,
     Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted
     by the Board of Trustees. Amundi Pioneer's, formerly PIM's, fair valuation
     team uses fair value methods approved by the Valuation

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 31


     Committee of the Board of Trustees. Amundi Pioneer's, formerly PIM's, fair
     valuation team is responsible for monitoring developments that may impact
     fair valued securities and for discussing and assessing fair values on an
     ongoing basis, and at least quarterly, with the Valuation Committee of the
     Board of Trustees.

     Inputs used when applying fair value methods to value a security may
     include credit ratings, the financial condition of the company, current
     market conditions and comparable securities. The Fund may use fair value
     methods if it is determined that a significant event has occurred after the
     close of the exchange or market on which the security trades and prior to
     the determination of the Fund's net asset value. Examples of a significant
     event might include political or economic news, corporate restructurings,
     natural disasters, terrorist activity or trading halts. Thus, the valuation
     of the Fund's securities may differ significantly from exchange prices and
     such differences could be material.

     At May 31, 2017, there were no securities that were valued using fair value
     methods (other than securities valued using prices supplied by independent
     pricing services).

B.   Investment Income and Transactions

     Dividend income is recorded on the ex-dividend date, except that certain
     dividends from foreign securities where the ex-dividend date may have
     passed are recorded as soon as the Fund becomes aware of the ex-dividend
     data in the exercise of reasonable diligence. Interest income, including
     interest on income-bearing cash accounts, is recorded on the accrual basis.
     Dividend and interest income are reported net of unrecoverable foreign
     taxes withheld at the applicable country rates.

     Security transactions are recorded as of trade date. Gains and losses on
     sales of investments are calculated on the identified cost method for both
     financial reporting and federal income tax purposes.

C.   Foreign Currency Translation

     The books and records of the Fund are maintained in U.S. dollars. Amounts
     denominated in foreign currencies are translated into U.S. dollars using
     current exchange rates.

     Net realized gains and losses on foreign currency transactions, if any,
     represent, among other things, the net realized gains and losses on foreign
     currency contracts, disposition of foreign currencies and the difference
     between the amount of income accrued and the U.S. dollars actually
     received. Further, the effects of changes in foreign currency exchange
     rates on

32 Pioneer International Equity Fund | Semiannual Report | 5/31/17


     investments are not segregated in the Statement of Operations from the
     effects of changes in the market price of those securities but are included
     with the net realized and unrealized gain or loss on investments.

D.   Federal Income Taxes

     It is the Fund's policy to comply with the requirements of the Internal
     Revenue Code applicable to regulated investment companies and to distribute
     all of its net taxable income and net realized capital gains, if any, to
     its shareowners. Therefore, no provision for federal income taxes is
     required. As of November 30, 2016, the Fund did not accrue any interest or
     penalties with respect to uncertain tax positions, which, if applicable,
     would be recorded as an income tax expense in the Statement of Operations.
     Tax returns filed within the prior three years remain subject to
     examination by federal and state tax authorities.

     In addition to meeting the requirements of the Internal Revenue Code, the
     Fund may be required to pay local taxes on the recognition of capital gains
     and/or the repatriation of foreign currencies in certain countries. During
     the six months ended May 31, 2017, the Fund paid no such taxes.

     The amount and character of income and capital gain distributions to
     shareowners are determined in accordance with federal income tax rules,
     which may differ from U.S. GAAP. Distributions in excess of net investment
     income or net realized gains are temporary overdistributions for financial
     statement purposes resulting from differences in the recognition or
     classification of income or distributions for financial statement and tax
     purposes. Capital accounts within the financial statements are adjusted for
     permanent book/tax differences to reflect tax character, but are not
     adjusted for temporary differences.

     The tax character of current year distributions payable will be determined
     at the end of the current taxable year. The tax character of distributions
     paid during the fiscal year ended November 30, 2016 was as follows:



     ---------------------------------------------------------------------------
                                                                            2016
     ---------------------------------------------------------------------------
                                                                   
     Distribution paid from:
     Ordinary income                                                  $3,049,827
     ---------------------------------------------------------------------------
        Total                                                         $3,049,827
     ===========================================================================


              Pioneer International Equity Fund | Semiannual Report | 5/31/17 33


     The following shows the components of distributable earnings on a federal
     income tax basis at November 30, 2016:



     ---------------------------------------------------------------------------
                                                                           2016
     ---------------------------------------------------------------------------
                                                               
     Distributable earnings:
     Undistributed ordinary income                                $   1,559,252
     Capital loss carryforward                                     (120,239,519)
     Current year late year loss deferral                              (423,432)
     Net unrealized appreciation                                      2,447,337
     ---------------------------------------------------------------------------
          Total                                                   $(116,656,362)
     ===========================================================================


     The difference between book-basis and tax-basis net unrealized appreciation
     is attributable to the tax deferral of losses on wash sales and adjustments
     relating to PFICs.

E.   Fund Shares

     The Fund records sales and repurchases of its shares as of trade date.
     Amundi Pioneer Distributor, Inc., formerly Pioneer Funds Distributor, Inc.
     (PFD), the principal underwriter for the Fund, earned $4,641 in
     underwriting commissions on the sale of Class A shares during the six
     months ended May 31, 2017.

F.   Class Allocations

     Income, common expenses and realized and unrealized gains and losses are
     calculated at the Fund level and allocated daily to each class of shares
     based on its respective percentage of adjusted net assets at the beginning
     of the day.

     Distribution fees are calculated based on the average daily net asset value
     attributable to Class A and Class C shares of the Fund, respectively (see
     Note 4). Class Y shares do not pay distribution fees. All expenses and fees
     paid to the Fund's transfer agent for its services are allocated among the
     classes of shares based on the number of accounts in each class and the
     ratable allocation of related out-of-pocket expenses (see Note 3).

     Distributions to shareowners are recorded as of the ex-dividend date.
     Distributions paid by the Fund with respect to each class of shares are
     calculated in the same manner and at the same time except that net
     investment income dividends to Class A, Class C and Class Y shares can
     reflect different transfer agent and distribution expense rates.

G.   Risks

     The value of securities held by the fund may go up or down, sometimes
     rapidly or unpredictably, due to general market conditions, such as real or
     perceived adverse economic, political or regulatory conditions, inflation,
     changes in interest rates, lack of liquidity in the bond markets or adverse
     investor sentiment. In the past several years, financial markets have

34 Pioneer International Equity Fund | Semiannual Report | 5/31/17


     experienced increased volatility, depressed valuations, decreased liquidity
     and heightened uncertainty. These conditions may continue, recur, worsen or
     spread.

     Investing in foreign and/or emerging markets securities involves risks
     relating to interest rates, currency exchange rates and economic and
     political conditions. The Fund may invest a substantial amount of its
     assets in issuers located in a limited number of countries and therefore is
     susceptible to adverse economic, political or regulatory developments
     affecting those countries. At times, the Fund's investments may represent
     industries or industry sectors that are interrelated or have common risks,
     making the Fund more susceptible to any economic, political, or regulatory
     developments or other risks affecting those industries and sectors. The
     Fund's prospectus contains unaudited information regarding the Fund's
     principal risks. Please refer to that document when considering the Fund's
     principal risks.

2. Management Agreement

Amundi Pioneer, formerly PIM manages the Fund's portfolio. Management fees are
calculated daily at the annual rate of 0.85% of the Fund's average daily net
assets up to $500 million and 0.75% of the excess over $500 million. For the six
months ended May 31, 2017, the effective management fee (excluding waivers
and/or assumptions of expenses) was equivalent to 0.85% of the Fund's average
daily net assets.

Amundi Pioneer, formerly PIM, contractually agreed to limit ordinary
operating expenses to the extent required to reduce Fund expenses to 1.45%
and 2.35%, of the average daily net assets attributable to Class A and Class C
shares, respectively. These expense limitations are in effect through April 1,
2018. There can be no assurance that Amundi Pioneer, formerly PIM, will
extend the expense limitation agreement for a class of shares beyond the date
referred to above. Fees waived and expenses reimbursed during the six months
ended May 31, 2017 are reflected on the Statement of Operations. Class Y
shares do not have an expense limitation.

In addition, under the management and administration agreements, certain other
services and costs, including accounting, regulatory reporting and insurance
premiums, are paid by the Fund as administrative reimbursements. Included in
"Due to affiliates" reflected on the Statement of Assets and Liabilities is
$141,513 in management fees, administrative costs and certain other
reimbursements payable to Amundi Pioneer, formerly PIM, at May 31, 2017.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 35


3. Transfer Agent

Boston Financial Data Services, Inc. serves as the transfer agent to the Fund at
negotiated rates. Transfer agent fees and payables shown on the Statement of
Operations and the Statement of Assets and Liabilities, respectively, include
sub-transfer agent expenses incurred through the Fund's omnibus relationship
contracts.

In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses
incurred by the transfer agent related to shareholder communications activities
such as proxy and statement mailings and outgoing phone calls. For the six
months ended May 31, 2017, such out-of-pocket expenses by class of shares
were as follows:



--------------------------------------------------------------------------------
Shareholder Communications:
--------------------------------------------------------------------------------
                                                                      
Class A                                                                  $50,626
Class C                                                                    6,631
Class Y                                                                      238
--------------------------------------------------------------------------------
   Total                                                                 $57,495
================================================================================


4. Distribution Plan

The Fund has adopted a Distribution Plan (the Plan) pursuant to Rule 12b-1 of
the Investment Company Act of 1940 with respect to its Class A and Class C
shares. Pursuant to the Plan, the Fund pays Amundi Pioneer Distributor, Inc.,
formerly PFD, 0.25% of the average daily net assets attributable to Class A
shares as compensation for personal services and/or account maintenance services
or distribution services with regard to Class A shares. Pursuant to the Plan,
the Fund also pays Amundi Pioneer Distributor, Inc., formerly PFD, 1.00% of the
average daily net assets attributable to Class C shares. The fee for Class C
shares consists of a 0.25% service fee and a 0.75% distribution fee paid as
compensation for personal services and/or account maintenance services or
distribution services with regard to Class C shares. Included in "Due to
affiliates" reflected on the Statement of Assets and Liabilities is $27,696 in
distribution fees payable to Amundi Pioneer Distributor, Inc., formerly PFD, at
May 31, 2017.

In addition, redemptions of each class of shares (except Class Y shares) may be
subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may
be imposed on redemptions of certain net asset value purchases of Class A
shares within 12 months of purchase. Redemptions of Class C shares within
12 months of purchase are subject to a CDSC of 1.00%, based on the lower of
cost or market value of shares being redeemed. Shares purchased as part of an
exchange remain subject to any CDSC that applied to the original purchase of
those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs

36 Pioneer International Equity Fund | Semiannual Report | 5/31/17


are paid to Amundi Pioneer Distributor, Inc., formerly PFD. For the six
months ended May 31, 2017, CDSCs in the amount of $1,289 were paid to
Amundi Pioneer Distributor, Inc., formerly PFD.

5. Line of Credit Facility

The Fund, along with certain other funds in the Pioneer Family of Funds (the
Funds), participates in a committed, unsecured revolving line of credit
facility. Borrowings are used solely for temporary or emergency purposes. The
Fund may borrow up to the lesser of the amount available under the facility or
the limits set for borrowing by the Fund's prospectus and the 1940 Act. The
credit facility in which the Fund participated until February 9, 2016 was in the
amount of $240 million. The credit facility in which the fund participated until
February 7, 2017 was in the amount of $220 million. Effective February 8, 2017,
the Fund participates in a facility that is in the amount of $25 million. Under
such facility, depending on the type of loan, interest on borrowings is payable
at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis,
or the Alternate Base Rate, which is the greater of (a) the facility's
administrative agent's daily announced prime rate on the borrowing date, (b) 2%
plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight
Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to
participate in a credit facility. The commitment fee is allocated among
participating Funds based on an allocation schedule set forth in the credit
agreement. For the six months ended May 31, 2017, the Fund had no borrowings
under the credit facility.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 37


Change in Independent Registered Public Accounting Firm

Prior to July 3, 2017 Pioneer Investment Management, Inc. (the "Adviser"), the
Fund's investment adviser, was an indirect, wholly owned subsidiary of UniCredit
S.p.A. ("UniCredit"). On that date, UniCredit completed the sale of its Pioneer
Investments business, which includes the Adviser, to Amundi (the "Transaction").
As a result of the Transaction, the Adviser became an indirect, wholly-owned
subsidiary of Amundi. Amundi is controlled by Credit Agricole S.A. Amundi is
headquartered in Paris, France, and, as of September 30, 2016, had more than
$1.1 trillion in assets under management worldwide.

Deloitte & Touche LLP ("D&T"), the Fund's previous independent registered public
accounting firm, informed the Audit Committee and the Board that it would no
longer be independent with respect to the Fund upon the completion of the
Transaction as a result of certain services being provided to Amundi and Credit
Agricole, and, accordingly, that it intended to resign as the Fund's independent
registered public accounting firm upon the completion of the Transaction. D&T's
resignation was effective on July 3, 2017, when the Transaction was completed.

During the periods as to which D&T has served as the Fund's independent
registered public accounting firm, including the Fund's two most recent fiscal
years preceding the fiscal year ended June 30, 2017, D&T's reports on the Fund's
financial statements have not contained an adverse opinion or disclaimer of
opinion and have not been qualified or modified as to uncertainty, audit scope
or accounting principles. Further, there have been no disagreements with D&T on
any matter of accounting principles or practices, financial statement
disclosure, or auditing scope or procedure, which, if not resolved to the
satisfaction of D&T, would have caused D&T to make reference to the subject
matter of the disagreement in connection with its report on the financial
statements. In addition, there have been no reportable events of the kind
described in Item 304(a)(1)(v) of Regulation S-K under the Securities Exchange
Act of 1934.

Effective immediately following the completion of the Transaction on July 3,
2017, the Board, acting upon the recommendation of the Audit Committee, engaged
a new independent registered public accounting firm, Ernst & Young LLP ("EY"),
for the Fund's fiscal year ended June 30, 2017.

Prior to its engagement, EY had advised the Fund's Audit Committee that EY had
identified the following matters, in each case relating to services rendered by
other member firms of Ernst & Young Global Limited, all of which are located
outside the United States, to UniCredit and certain of its subsidiaries during
the period commencing July 1, 2016, that it determined to be inconsistent with
the auditor independence rules set forth by the Securities

38 Pioneer International Equity Fund | Semiannual Report | 5/31/17


and Exchange Commission ("SEC"): (a) project management support services to
UniCredit in the Czech Republic, Germany, Italy, Serbia and Slovenia in relation
to twenty-two projects, that were determined to be inconsistent with Rule
2-01(c)(4)(vi) of Regulation S-X (management functions); (b) two engagements for
UniCredit in Italy where fees were contingent/success based and that were
determined to be inconsistent with Rule 2-01(c)(5) of Regulation S-X (contingent
fees); (c) four engagements where legal and expert services were provided to
UniCredit in the Czech Republic and Germany, and twenty engagements where the
legal advisory services were provided to UniCredit in Austria, Czech Republic,
Italy and Poland, that were determined to be inconsistent with Rule
2-01(c)(4)(ix) and (x) of Regulation S-X (legal and expert services); and (d)
two engagements for UniCredit in Italy involving assistance in the sale of
certain assets, that were determined to be inconsistent with Rule
2-01(c)(4)(viii) of Regulation S-X (broker-dealer, investment advisor or
investment banking services). None of the foregoing services involved the Fund,
any of the other funds in the Pioneer Family of Funds or any other Pioneer
entity sold by UniCredit in the Transaction.

EY advised the Audit Committee that it had considered the matters described
above and had concluded that such matters would not impair EY's ability to
exercise objective and impartial judgment in connection with the audits of the
financial statements of the Fund under the SEC and Public Company Accounting
Oversight Board independence rules, and that a reasonable investor with
knowledge of all relevant facts and circumstances would reach the same
conclusion. Management and the Audit Committee considered these matters and
discussed the matters with EY and, based upon EY's description of the matters
and statements made by EY, Management and the Audit Committee believe that EY
will be capable of exercising objective and impartial judgment in connection
with the audits of the financial statements of the Fund, and Management further
believes that a reasonable investor with knowledge of all relevant facts and
circumstances would reach the same conclusion.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 39


Approval of New and Interim Management Agreements

Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer
Investment Management, Inc., serves as the investment adviser to Pioneer
International Equity Fund (the Fund) pursuant to an investment management
agreement between Amundi Pioneer and the Fund.

On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset
management companies located throughout the world (the "Transaction"). As a
result of the Transaction, Amundi Pioneer became an indirect wholly-owned
subsidiary of Amundi and Amundi's wholly-owned subsidiary, Amundi USA, Inc.
Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset
Management S.p.A. ("PGAM"), a wholly-owned subsidiary of UniCredit S.p.A.
("UniCredit").

Under the Investment Company Act of 1940, the Fund's current investment
management agreement (the "Current Management Agreement") terminated
automatically upon the consummation of the Transaction. In order for Amundi
Pioneer to continue to manage the Fund after the consummation of the
Transaction, the Trustees and shareholders of the Fund were required to approve
a new investment management agreement for the Fund (the "New Management
Agreement"). As discussed below, the Board of Trustees of the Fund approved the
New Management Agreement at a meeting held on March 6-7, 2017. The New
Management Agreement was approved by the shareholders of the Fund at a meeting
held on June 13, 2017. The Board of Trustees of the Fund also approved an
interim investment management agreement between Amundi Pioneer and the Fund (the
"Interim Management Agreement") at the March 6-7, 2017 meeting. The Interim
Management Agreement would have taken effect upon the closing of the Transaction
in the event that the shareholders of the Fund did not approve the New
Management Agreement.

Board Evaluation of the New and Interim Management Agreements

The Board evaluated the Transaction and the New Management Agreement and Interim
Management Agreement for the Fund. In connection with their evaluation of the
Transaction and the New Management Agreement for the Fund, the Trustees
requested such information as they deemed reasonably necessary, including: (a)
the structure of the Transaction and the strategy underlying the Transaction;
(b) the anticipated benefits of the Transaction to the Fund and its
shareholders; (c) the post-Transaction plans for Amundi Pioneer, including
Amundi's plans for integration of Pioneer Investments and Amundi Pioneer with
its existing asset management businesses and plans for the future development of
Amundi Pioneer; (d) the effect of the Transaction on the ongoing services
provided to the Fund, including the need to select a new independent registered
public accounting firm for the Fund, and any

40 Pioneer International Equity Fund | Semiannual Report | 5/31/17


plans to modify the operations of the Fund; (e) the stability and continuity of
Amundi Pioneer's management and key employees, including compensation and
benefits to Amundi Pioneer's key employees, and retention plans and incentive
plan structure; (f) the post-Transaction indebtedness and financial resources of
Amundi Pioneer; (g) Amundi's legal and operational structure, its principal
shareholders and senior management, its investment management, risk management,
administrative, legal and compliance functions; (h) certain regulatory matters
relating to Amundi's affiliates; and (i) Amundi's commitment to the United
States, including the role of Amundi Pioneer in the larger Amundi business.

The Trustees also requested and obtained the following information in connection
with their evaluation of the Transaction and the New Management Agreement for
the Fund: (i) memoranda provided by Fund counsel that summarized the legal
standards and other considerations that are relevant to the Trustees in their
deliberations regarding the New Management Agreement; (ii) the qualifications of
the investment management teams for the Fund, as well as the level of investment
by the Fund's portfolio managers in the Fund; (iii) the Fund's management fees
and total expense ratios, the financial statements of Amundi Pioneer and its
pre- and post-Transaction parent companies, profitability analyses from Amundi
Pioneer, and analyses from Amundi Pioneer as to possible economies of scale;
(iv) the profitability of the institutional business of Amundi Pioneer and
Amundi Pioneer's affiliate, Amundi Pioneer Institutional Asset Management, Inc.
("Amundi Pioneer Institutional") as compared to that of Amundi Pioneer's fund
management business; and (v) the differences between the fees and expenses of
the Fund and the fees and expenses of Amundi Pioneer's and Amundi Pioneer
Institutional's institutional accounts, as well as the different services
provided by Adviser to the Fund and by Amundi Pioneer and Amundi Pioneer
Institutional to the institutional accounts. In addition, the Trustees
considered the information provided at regularly scheduled meetings throughout
the year regarding the Fund's performance and risk attributes, including through
meetings with investment management personnel, and took into account other
information related to the Fund provided to the Trustees at regularly scheduled
meetings. The Trustees also considered information they had received in their
review of the continuance of the Current Management Agreement for the Fund in
September 2016.

At meetings held on January 9, 2017 and January 10, 2017, the Trustees met with
representatives of Amundi and PGAM, including separate meetings of the Trustees
who are not "interested persons" of the Fund Complex ("Independent Trustees")
and counsel with representatives of Amundi and PGAM, and subsequently with
representatives of Amundi. In those meetings, they received an extensive
presentation from the representatives of Amundi, including the chief executive
officer of Amundi, describing Amundi's

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 41


background and history, its global asset management activities, the growth of
its business, and its status as the largest asset management firm in Europe and
one of the largest globally; its capital structure and financial resources,
including information as to the financing of the Transaction; its principal
investors, including its majority investor Credit Agricole S.A., and Credit
Agricole's long-term commitment to the asset management business; the
philosophy and strategy underlying the Transaction and the complementarity
of Amundi's and Pioneer Investments' respective asset management
businesses; Amundi's various operating and investment committees and how
they would likely interact with Amundi Pioneer; the proposed integration
process, including the progress to date and the establishment of various
integration work streams; Amundi's plans for management of Amundi
Pioneer; Amundi's philosophy as to compensation of key employees and its
general intentions with respect to incentive plans for key employees of Amundi
Pioneer; Amundi's preliminary plans to achieve cost and other synergies; and
opportunities to further develop the business of Amundi Pioneer and Amundi
Pioneer Institutional, including in the area of institutional asset management,
and how that would benefit shareholders of the Pioneer Funds.

In those meetings, the representatives of Amundi confirmed their intention that
the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer would
remain in their current positions, and confirmed that they do not currently
foresee major changes in the day-to-day investment management operations of
Amundi Pioneer with respect to the Fund as a direct result of the Transaction.
They discussed incentive arrangements for key personnel that would continue
after the closing of the Transaction and their plans to establish a new
long-term incentive plan following the closing. They also generally discussed
ways in which Amundi Pioneer could potentially draw on the expanded global
resources of Amundi post-Transaction. At those meetings, the Independent
Trustees identified certain areas to which they requested further information,
including as to trading and execution of securities transactions, research and
portfolio management and potential changes in investment process, particularly
where asset classes managed by Amundi Pioneer would overlap with asset classes
managed by Amundi, the continued availability of resources currently at Pioneer
Investments or elsewhere within Amundi to assist in management of certain Funds,
and any anticipated significant changes in operations. The Independent Trustees
considered the uncertainty as to whether the Fund's independent registered
public accounting firm could continue to act in that capacity after the closing
of the Transaction. The Independent Trustees also met with counsel to review the
information they had received to date and to discuss next steps.

Subsequently, the Trustees received further information from Amundi,
including written responses to questions raised by the Independent Trustees,
and received from Amundi Pioneer the information requested of it. The

42 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Independent Trustees reviewed the information provided with counsel at
telephonic meetings held on February 16, 2017 and February 27, 2017. The
Trustees held a special in-person Board meeting on March 6-7, 2017 for further
consideration of the New Management Agreements, the Interim Management
Agreements and the Transaction. The Trustees met again with senior executives of
Amundi at the March 6-7, 2017 meeting.

At the March 6-7, 2017 meeting, based on their evaluation of the information
provided by Amundi Pioneer and Amundi, the Trustees including the Independent
Trustees voting separately, approved the New Management Agreement and the
Interim Management Agreement for the Fund. In considering the New Management
Agreement for the Fund, the Trustees considered various factors that they
determined were relevant, including the factors described below. The Trustees
did not identify any single factor as the controlling factor in their
determinations. The Trustees considered the same factors with respect to the
Interim Management Agreement for the Fund.

Nature, Extent and Quality of Services

The Trustees considered the nature, extent and quality of the services that had
been provided by Amundi Pioneer to the Fund and that are expected to be provided
by Amundi Pioneer to the Fund following the consummation of the Transaction. The
Trustees reviewed the terms of the New Management Agreement, and noted that such
terms are substantially similar to the terms of the Current Management
Agreement, except for different execution dates, effective dates and termination
dates. The Trustees reviewed Amundi Pioneer's investment approach for the Fund
and its research process. The Trustees considered the resources of Amundi
Pioneer and the personnel of Amundi Pioneer who provide investment management
services to the Fund. They also reviewed the amount of non-investment resources
and personnel of Amundi Pioneer that are involved in Amundi Pioneer's services
to the Fund, including Amundi Pioneer's compliance and legal resources and
personnel. The Trustees noted the substantial attention and high priority given
by Amundi Pioneer's senior management to the Pioneer Fund complex.

The Trustees considered that Amundi Pioneer supervises and monitors the
performance of the Fund's service providers and provides the Fund with personnel
(including Fund officers) and other resources that are necessary for the Fund's
business management and operations and that Amundi Pioneer would continue to
provide those investment management and research services and resources to the
Fund following the consummation of the Transaction. The Trustees also considered
that, as administrator, Amundi Pioneer would continue to be responsible for the
administration of the Fund's business and other affairs. The Trustees considered
the fees to be paid to Amundi Pioneer for the provision of administration
services.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 43


The Trustees considered that Deloitte & Touche LLP informed the Board that it
would no longer be independent with respect to the Fund upon the completion of
the Transaction and, accordingly, that it would be necessary for the Board to
engage a new independent registered public accounting firm for the Fund.

The Trustees considered that the Transaction was not expected to have a material
adverse impact on the nature, scope and overall quality of services provided to
the Fund and its shareholders, including investment management, risk management,
administrative, compliance, legal and other services, as a result of the
Transaction.

In that regard, the Trustees considered that Amundi is one of the largest asset
managers globally, and that Amundi Pioneer may have access to additional
research and portfolio management capabilities as a result of the Transaction
and that Amundi Pioneer, as part of Amundi, is expected to have an enhanced
global presence that may contribute to an increase in the overall scale and
resources of Amundi Pioneer. Furthermore, in considering whether the Transaction
would be expected to have a material adverse impact on the nature, scope and
overall quality of services provided to the Fund and its shareholders, the
Trustees considered the statements by representatives of Amundi that they expect
the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer to
remain in their current positions and that they do not currently foresee major
changes in the day-to-day investment management operations of Amundi Pioneer as
a direct result of the Transaction, or the risk management, legal or compliance
services provided by Amundi Pioneer, with respect to the Fund. They further
considered the current incentive arrangements for key personnel of Amundi
Pioneer that would continue after the closing of the Transaction. They also
noted Amundi's stated intention to establish a new long-term incentive plan
following the closing.

The Trustees also took into account their experience in evaluating the proposed
combination of Pioneer Investments and Santander Asset Management, which was
announced in September, 2014 and abandoned in July, 2016. In light of, among
other things, this experience, the Trustees determined that they were not able
to identify any realistic alternatives to approving the New Management Agreement
that would provide the level of services to the Fund and its shareholders that
are expected to be provided by Amundi Pioneer after the closing of the
Transaction.

Based on these considerations, the Trustees concluded that the nature, extent
and quality of services that Amundi Pioneer would continue to provide to the
Fund under the New Management Agreement would be satisfactory and consistent
with the terms of the New Management Agreement.

44 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Performance of the Fund

In considering the Fund's performance, the Trustees regularly reviewed and
discussed throughout the year data prepared by Amundi Pioneer and information
comparing the Fund's performance with the performance of its peer group of
funds, as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and
the performance of the Fund's benchmark index. They also discussed the Fund's
performance with Amundi Pioneer on a regular basis.

The Trustees' regular reviews and discussions were factored into the Trustees'
deliberations concerning the approval of the New Management Agreement.

Management Fee and Expenses

The Trustees noted that the stated management fees to be paid by the Fund are
identical under the Current Management Agreement and the New Management
Agreement. The Trustees considered information showing the fees and expenses of
the Fund in comparison to the management fees and expense ratios of its peer
group of funds as classified by Morningstar and also to the expense ratios of a
peer group of funds selected on the basis of criteria determined by the
Independent Trustees for this purpose using data provided by Strategic Insight
Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent
third party. In all quintile rankings referred to below, first quintile is most
favorable to the Fund's shareowners. To the extent applicable, the Trustees also
considered the impact of transfer agency, sub-transfer agency, and other
non-management fee expenses on the expense ratios of the Fund. The Trustees
noted that they separately review the Fund's transfer agency, sub-transfer
agency and intermediary arrangements and that the results of the most recent
such review were considered in the consideration of the Fund's expense ratio.

The Trustees considered that the Fund's management fee as of September 30, 2016
was in the third quintile relative to the management fees paid by other funds in
its Morningstar category for the comparable period. The Trustees also considered
the breakpoint in the management fee schedule and the reduced fee rate above a
certain asset level. The Trustees considered that the expense ratio of the
Fund's Class A shares as of September 30, 2016 was in the fourth quintile
relative to its Morningstar category and in the fourth quintile relative to its
Strategic Insight peer group, in each case for the comparable period. The
Trustees considered that the expense ratio of the Fund's Class Y shares as of
September 30, 2016 was in the fourth quintile relative to its Morningstar
category and in the fourth quintile relative to its Strategic Insight peer
group, in each case for the comparable period. The Trustees noted that Amundi
Pioneer had agreed to waive fees and/or reimburse expenses in order to limit the
ordinary operating expenses of the Fund. The Trustees noted the Fund's
relatively small asset size compared to most of the other funds in its

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 45


peer groups. The Trustees noted the impact of expenses relating to small
accounts and omnibus accounts on transfer and sub-transfer agency expenses
generally. The Trustees considered that such non-management fee operating
expenses generally are spread over a smaller asset base than the other funds in
the peer group, which results in these fees being significantly higher as a
percentage of assets.

The Trustees reviewed management fees charged by Amundi Pioneer and Amundi
Pioneer Institutional to institutional and other clients, including publicly
offered European funds sponsored by Amundi Pioneer's affiliates, unaffiliated
U.S. registered investment companies (in a sub-advisory capacity), and
unaffiliated foreign and domestic separate accounts. The Trustees also
considered Amundi Pioneer's costs in providing services to the Fund and Amundi
Pioneer's and Amundi Pioneer Institutional's costs in providing services to the
other clients and considered the differences in management fees and profit
margins for fund and non-fund services. In evaluating the fees associated with
Amundi Pioneer's and Amundi Pioneer Institutional's client accounts, the
Trustees took into account the respective demands, resources and complexity
associated with the Fund and other client accounts. The Trustees noted that in
some instances the fee rates for those clients were lower than the management
fee for the Fund and considered that, under both the Current Management
Agreement and the New Management Agreement, Amundi Pioneer would perform
additional services for the Fund that it does not provide to those other clients
or services that are broader in scope, including oversight of the Fund's other
service providers and activities related to compliance and the extensive
regulatory and tax regimes to which the Fund is subject. The Trustees also
considered the different risks associated with Amundi Pioneer's management of
the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's management of
the other client accounts.

The Trustees concluded that the management fee payable by the Fund to Amundi
Pioneer was reasonable in relation to the nature and quality of the services to
be provided by Amundi Pioneer.

Profitability

The Trustees considered information provided by Amundi Pioneer regarding the
profitability of Amundi Pioneer with respect to the advisory services provided
by Amundi Pioneer to the Fund, including the methodology used by Amundi Pioneer
in allocating certain of its costs to the management of the Fund. The Trustees
also considered Amundi Pioneer's profit margin in connection with the overall
operation of the Fund. They further reviewed the financial results, including
the profit margins, realized by Amundi Pioneer and Amundi Pioneer Institutional
from non-fund businesses. The Trustees considered Amundi Pioneer's profit
margins with respect to the Fund in

46 Pioneer International Equity Fund | Semiannual Report | 5/31/17


comparison to the limited industry data available and noted that the
profitability of any adviser was affected by numerous factors, including its
organizational structure and method for allocating expenses. The Trustees
concluded that Amundi Pioneer's profitability with respect to the management of
the Fund was not unreasonable.

Economies of Scale

The Trustees considered Amundi Pioneer's views relating to economies of scale in
connection with the Pioneer Funds as fund assets grow and the extent to which
any such economies of scale are shared with the Fund and Fund shareholders. The
Trustees recognize that economies of scale are difficult to identify and
quantify, and that, among other factors that may be relevant, are the following:
fee levels, expense subsidization, investment by Amundi Pioneer in research and
analytical capabilities and Amundi Pioneer's commitment and resource allocation
to the Fund. The Trustees noted that profitability also may be an indicator of
the availability of any economies of scale, although profitability may vary for
other reasons including due to reductions in expenses. The Trustees concluded
that economies of scale, if any, were being appropriately shared with the Fund.

Other Benefits

The Trustees considered the other benefits that Amundi Pioneer enjoys from its
relationship with the Fund. The Trustees considered the character and amount of
fees paid or to be paid by the Fund, other than under the Current Management
Agreement or the New Management Agreement, for services provided by Amundi
Pioneer and its affiliates. The Trustees further considered the revenues and
profitability of Amundi Pioneer's businesses other than the Fund business. To
the extent applicable, the Trustees also considered the benefits to the Fund and
to Amundi Pioneer and its affiliates from the use of "soft" commission dollars
generated by the Fund to pay for research and brokerage services.

The Trustees considered that following the completion of the Transaction, Amundi
Pioneer will be the principal U.S. asset management business of Amundi, and that
Amundi's worldwide asset management business will manage over $1.38 trillion in
assets (including the Pioneer Funds). This may create opportunities for Amundi
Pioneer, Amundi Pioneer Institutional and Amundi that derive from Amundi
Pioneer's relationships with the Fund, including Amundi's ability to market the
services of Amundi Pioneer globally. The Trustees noted that Amundi Pioneer may
have access to additional research capabilities as a result of the Transaction
and Amundi's enhanced global presence that may contribute to an increase of the
overall scale of Amundi Pioneer. The Trustees considered that Amundi Pioneer and
the Fund are expected to receive reciprocal intangible benefits from the
relationship,

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 47


including mutual brand recognition and, for the Fund, direct and indirect access
to the resources of a large global asset manager. The Trustees concluded that
any such benefits received by Amundi Pioneer as a result of its relationship
with the Fund were reasonable.

Conclusion

After consideration of the factors described above as well as other factors, the
Trustees, including the Independent Trustees, concluded that the New Management
Agreement and the Interim Management Agreement for the Fund, including the fees
payable thereunder, were fair and reasonable and voted to approve the New
Management Agreement and the Interim Management Agreement, and to recommend that
shareholders approve the New Management Agreement.

48 Pioneer International Equity Fund | Semiannual Report | 5/31/17


Trustees, Officers and Service Providers

Trustees                                    Officers
Thomas J. Perna, Chairman                   Lisa M. Jones, President and Chief
David R. Bock                                 Executive Officer
Benjamin M. Friedman                        Mark E. Bradley, Treasurer and
Margaret B.W. Graham                          Chief Financial Officer
Lisa M. Jones                               Christopher J. Kelley, Secretary and
Lorraine H. Monchak                           Chief Legal Officer
Marguerite A. Piret
Fred J. Ricciardi
Kenneth J. Taubes

Investment Adviser and Administrator
Amundi Pioneer Asset Management, Inc., formerly
Pioneer Investment Management, Inc.

Custodian and Sub-Administrator
Brown Brothers Harriman & Co.

Principal Underwriter
Amundi Pioneer Distributor, Inc., formerly
Pioneer Funds Distributor, Inc.

Legal Counsel
Morgan, Lewis & Bockius LLP

Shareowner Services and Transfer Agent
Boston Financial Data Services, Inc.

Proxy Voting Policies and Procedures of the Fund are available without charge,
upon request, by calling our toll free number (1-800-225-6292). Information
regarding how the Fund voted proxies relating to portfolio securities during the
most recent 12-month period ended June 30 is publicly available to shareowners
at www.amundipioneer.com. This information is also available on the Securities
and Exchange Commission's web site at www.sec.gov.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 49


                          This page is for your notes.

50 Pioneer International Equity Fund | Semiannual Report | 5/31/17


                          This page is for your notes.

              Pioneer International Equity Fund | Semiannual Report | 5/31/17 51


                          This page is for your notes.

52 Pioneer International Equity Fund | Semiannual Report | 5/31/17


How to Contact Amundi Pioneer

We are pleased to offer a variety of convenient ways for you to contact us for
assistance or information.

Call us for:
--------------------------------------------------------------------------------
Account Information, including existing accounts,
new accounts, prospectuses, applications
and service forms                                                 1-800-225-6292

FactFone(SM) for automated fund yields, prices,
account information and transactions                              1-800-225-4321

Retirement plans information                                      1-800-622-0176

Write to us:
--------------------------------------------------------------------------------
Amundi Pioneer
P.O. Box 55014
Boston, Massachusetts 02205-5014

Our toll-free fax                                                 1-800-225-4240

Our internet e-mail address                  ask.amundipioneer@amundipioneer.com
(for general questions about Amundi Pioneer only)

Visit our web site: www.amundipioneer.com

This report must be preceded or accompanied by a prospectus.

The Fund files a complete schedule of investments with the Securities and
Exchange Commission for the first and third quarters for each fiscal year on
Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's
web site at http://www.sec.gov. The filed form may also be viewed and copied at
the Commission's Public Reference Room in Washington, DC. Information regarding
the operations of the Public Reference Room may be obtained by calling
1-800-SEC-0330.


[LOGO]    Amundi Pioneer
          ==============
        ASSET MANAGEMENT

Amundi Pioneer Asset Management Inc.
60 State Street
Boston, MA 02109
www.amundipioneer.com

Securities offered through Amundi Pioneer Distributor, Inc.
60 State Street, Boston, MA 02109
Underwriter of Pioneer Mutual Funds, Member SIPC
(C) 2017 Amundi Pioneer Asset Management 19390-11-0717




ITEM 2. CODE OF ETHICS.

(a) Disclose whether, as of the end of the period covered by the report, the
registrant has adopted a code of ethics that applies to the registrant's
principal executive officer, principal financial officer, principal accounting
officer or controller, or persons performing similar functions, regardless of
whether these individuals are employed by the registrant or a third party.  If
the registrant has not adopted such a code of ethics, explain why it has not
done so.

The registrant has adopted, as of the end of the period covered by this report,
a code of ethics that applies to the registrant's principal executive officer,
principal financial officer, principal accounting officer and controller.

(b) For purposes of this Item, the term "code of ethics" means written standards
that are reasonably designed to deter wrongdoing and to promote:

        (1) Honest and ethical conduct, including the ethical handling of actual
        or apparent conflicts of interest between personal and professional
        relationships;

        (2) Full, fair, accurate, timely, and understandable disclosure in
        reports and documents that a registrant files with, or submits to, the
        Commission and in other public communications made by the registrant;

        (3) Compliance with applicable governmental laws, rules, and
        regulations;

        (4) The prompt internal reporting of violations of the code to an
        appropriate person or persons identified in the code; and

        (5) Accountability for adherence to the code.

(c) The registrant must briefly describe the nature of any amendment, during the
period covered by the report, to a provision of its code of ethics that applies
to the registrant's principal executive officer, principal financial officer,
principal accounting officer or controller, or persons performing similar
functions, regardless of whether these individuals are employed by the
registrant or a third party, and that relates to any element of the code of
ethics definition enumerated in paragraph (b) of this Item. The registrant must
file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless
the registrant has elected to satisfy paragraph (f) of this Item by posting its
code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by
undertaking to provide its code of ethics to any person without charge, upon
request, pursuant to paragraph (f)(3) of this Item.

The registrant has made no amendments to the code of ethics during the period
covered by this report.

(d) If the registrant has, during the period covered by the report, granted a
waiver, including an implicit waiver, from a provision of the code of ethics to
the registrant's principal executive officer, principal financial officer,
principal accounting officer or controller, or persons performing similar
functions, regardless of whether these individuals are employed by the
registrant or a third party, that relates to one or more of the items set forth
in paragraph (b) of this Item, the registrant must briefly describe the nature
of the waiver, the name of the person to whom the waiver was granted, and the
date of the waiver.

Not applicable.

(e) If the registrant intends to satisfy the disclosure requirement under
paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from,
a provision of its code of ethics that applies to the registrant's principal
executive officer, principal financial officer, principal accounting officer or
controller, or persons performing similar functions and that relates to any
element of the code of ethics definition enumerated in paragraph (b) of this
Item by posting such information on its Internet website, disclose the
registrant's Internet address and such intention.

Not applicable.

(f) The registrant must:

        (1) File with the Commission, pursuant to Item 12(a)(1), a copy of
        its code of ethics that applies to the registrant's principal
        executive officer,principal financial officer, principal accounting
        officer or controller, or persons performing similar functions,
        as an exhibit to its annual
        report on this Form N-CSR (see attachment);

        (2) Post the text of such code of ethics on its Internet website and
        disclose, in its most recent report on this Form N-CSR, its Internet
        address and the fact that it has posted such code of ethics on its
        Internet website; or

        (3) Undertake in its most recent report on this Form N-CSR to provide to
        any person without charge, upon request, a copy of such code of ethics
        and explain the manner in which such request may be made.
	See Item 10(2)

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

(a) (1)  Disclose that the registrant's board of trustees has determined that
         the registrant either:

    (i)  Has at least one audit committee financial expert serving on its audit
         committee; or

    (ii) Does not have an audit committee financial expert serving on its audit
         committee.

The registrant's Board of Trustees has determined that the registrant has at
least one audit committee financial expert.

    (2) If the registrant provides the disclosure required by paragraph
(a)(1)(i) of this Item, it must disclose the name of the audit committee
financial expert and whether that person is "independent." In order to be
considered "independent" for purposes of this Item, a member of an audit
committee may not, other than in his or her capacity as a member of the audit
committee, the board of trustees, or any other board committee:

    (i)  Accept directly or indirectly any consulting, advisory, or other
         compensatory fee from the issuer; or

    (ii) Be an "interested person" of the investment company as defined in
         Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)).

Ms. Marguerite A. Piret, an independent trustee, is such an audit committee
financial expert.

    (3) If the registrant provides the disclosure required by paragraph (a)(1)
(ii) of this Item, it must explain why it does not have an audit committee
financial expert.

Not applicable.


ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

(a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each
of the last two fiscal years for professional services rendered by the principal
accountant for the audit of the registrant's annual financial statements or
services that are normally provided by the accountant in connection with
statutory and regulatory filings or engagements for those fiscal years.

N/A

(b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in
each of the last two fiscal years for assurance and related services by the
principal accountant that are reasonably related to the performance of the audit
of the registrant's financial statements and are not reported under
paragraph (a) of this Item. Registrants shall describe the nature of the
services comprising the fees disclosed under this category.

N/A


(c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of
the last two fiscal years for professional services rendered by the principal
accountant for tax compliance, tax advice, and tax planning. Registrants shall
describe the nature of the services comprising the fees disclosed under this
category.

N/A

(d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in
each of the last two fiscal years for products and services provided by the
principal accountant, other than the services reported in paragraphs (a) through
(c) of this Item. Registrants shall describe the nature of the services
comprising the fees disclosed under this category.

N/A

(e) (1) Disclose the audit committee's pre-approval policies and procedures
described in paragraph (c)(7) of Rule 2-01 of Regulation S-X.

 PIONEER FUNDS
            APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES
                       PROVIDED BY THE INDEPENDENT AUDITOR

                  SECTION I - POLICY PURPOSE AND APPLICABILITY

The Pioneer Funds recognize the importance of maintaining the independence of
their outside auditors. Maintaining independence is a shared responsibility
involving Pioneer Investment Management, Inc ("PIM"), the audit committee and
the independent auditors.

The Funds recognize that a Fund's independent auditors: 1) possess knowledge of
the Funds, 2) are able to incorporate certain services into the scope of the
audit, thereby avoiding redundant work, cost and disruption of Fund personnel
and processes, and 3) have expertise that has value to the Funds. As a result,
there are situations where it is desirable to use the Fund's independent
auditors for services in addition to the annual audit and where the potential
for conflicts of interests are minimal. Consequently, this policy, which is
intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and
procedures to be followed by the Funds when retaining the independent audit firm
to perform audit, audit-related tax and other services under those
circumstances, while also maintaining independence.

Approval of a service in accordance with this policy for a Fund shall also
constitute approval for any other Fund whose pre-approval is required pursuant
to Rule 210.2-01(c)(7)(ii).

In addition to the procedures set forth in this policy, any non-audit services
that may be provided consistently with Rule 210.2-01 may be approved by the
Audit Committee itself and any pre-approval that may be waived in accordance
with Rule 210.2-01(c)(7)(i)(C) is hereby waived.

Selection of a Fund's independent auditors and their compensation shall be
determined by the Audit Committee and shall not be subject to this policy.



                               SECTION II - POLICY

---------------- -------------------------------- -------------------------------------------------
SERVICE           SERVICE CATEGORY DESCRIPTION      SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES
CATEGORY
---------------- -------------------------------- -------------------------------------------------
                                            
I.  AUDIT        Services that are directly       o Accounting research assistance
SERVICES         related to performing the        o SEC consultation, registration
                 independent audit of the Funds     statements, and reporting
                                                  o Tax accrual related matters
                                                  o Implementation of new accounting
                                                    standards
                                                  o Compliance letters (e.g. rating agency
                                                    letters)
                                                  o Regulatory reviews and assistance
                                                    regarding financial matters
                                                  o Semi-annual reviews (if requested)
                                                  o Comfort letters for closed end
                                                    offerings
---------------- -------------------------------- -------------------------------------------------
II.              Services which are not           o AICPA attest and agreed-upon procedures
AUDIT-RELATED    prohibited under Rule            o Technology control assessments
SERVICES         210.2-01(C)(4) (the "Rule")      o Financial reporting control assessments
                 and are related extensions of    o Enterprise security architecture
                 the audit services support the     assessment
                 audit, or use the
                 knowledge/expertise gained
                 from the audit procedures as a
                 foundation to complete the
                 project.  In most cases, if
                 the Audit-Related Services are
                 not performed by the Audit
                 firm, the scope of the Audit
                 Services would likely
                 increase.  The Services are
                 typically well-defined and
                 governed by accounting
                 professional standards (AICPA,
                 SEC, etc.)
---------------- -------------------------------- -------------------------------------------------

 ------------------------------------- ------------------------------------
                                    
   AUDIT COMMITTEE APPROVAL POLICY               AUDIT COMMITTEE
                                                REPORTING POLICY
 ------------------------------------- ------------------------------------
                                    
 o "One-time" pre-approval             o A summary of all such
   for the audit period for all          services and related fees
   pre-approved specific service         reported at each regularly
   subcategories.  Approval of the       scheduled Audit Committee
   independent auditors as               meeting.
   auditors for a Fund shall
   constitute pre approval for
   these services.
 ------------------------------------- ------------------------------------
 o "One-time" pre-approval             o A summary of all such
   for the fund fiscal year within       services and related fees
   a specified dollar limit              (including comparison to
   for all pre-approved                  specified dollar limits)
   specific service subcategories        reported quarterly.

 o Specific approval is
   needed to exceed the
   pre-approved dollar limit for
   these services (see general
   Audit Committee approval policy
   below for details on obtaining
   specific approvals)

 o Specific approval is
   needed to use the Fund's
   auditors for Audit-Related
   Services not denoted as
   "pre-approved", or
   to add a specific service
   subcategory as "pre-approved"
 ------------------------------------- ------------------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- --------------------------- -----------------------------------------------
   SERVICE CATEGORY          SERVICE CATEGORY        SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES
                               DESCRIPTION
----------------------- --------------------------- -----------------------------------------------
                                              
III. TAX SERVICES       Services which are not      o Tax planning and support
                        prohibited by the Rule,     o Tax controversy assistance
                        if an officer of the Fund   o Tax compliance, tax returns, excise
                        determines that using the     tax returns and support
                        Fund's auditor to provide   o Tax opinions
                        these services creates
                        significant synergy in
                        the form of efficiency,
                        minimized disruption, or
                        the ability to maintain a
                        desired level of
                        confidentiality.
----------------------- --------------------------- -----------------------------------------------

------------------------------------- -------------------------
  AUDIT COMMITTEE APPROVAL POLICY         AUDIT COMMITTEE
                                          REPORTING POLICY
------------------------------------- -------------------------
------------------------------------- -------------------------
o "One-time" pre-approval             o A summary of
  for the fund fiscal  year             all such services and
  within a specified dollar limit       related fees
  				        (including comparison
  			                to specified dollar
  			                limits) reported
  			                quarterly.

o Specific approval is
  needed to exceed the
  pre-approved dollar limits for
  these services (see general
  Audit Committee approval policy
  below for details on obtaining
  specific approvals)

o Specific approval is
  needed to use the Fund's
  auditors for tax services not
  denoted as pre-approved, or to add a specific
  service subcategory as
  "pre-approved"
------------------------------------- -------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- --------------------------- -----------------------------------------------
   SERVICE CATEGORY          SERVICE CATEGORY        SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES
                               DESCRIPTION
----------------------- --------------------------- -----------------------------------------------
                                              
IV.  OTHER SERVICES     Services which are not      o Business Risk Management support
                        prohibited by the Rule,     o Other control and regulatory
A. SYNERGISTIC,         if an officer of the Fund     compliance projects
UNIQUE QUALIFICATIONS   determines that using the
                        Fund's auditor to provide
                        these services creates
                        significant synergy in
                        the form of efficiency,
                        minimized disruption,
                        the ability to maintain a
                        desired level of
                        confidentiality, or where
                        the Fund's auditors
                        posses unique or superior
                        qualifications to provide
                        these services, resulting
                        in superior value and
                        results for the Fund.
----------------------- --------------------------- -----------------------------------------------

--------------------------------------- ------------------------
    AUDIT COMMITTEE APPROVAL POLICY         AUDIT COMMITTEE
                                            REPORTING POLICY
------------------------------------- --------------------------
                                   
o "One-time" pre-approval             o A summary of
  for the fund fiscal year within       all such services and
  a specified dollar limit              related fees
  			               (including comparison
  			                to specified dollar
  				        limits) reported
                                        quarterly.
o Specific approval is
  needed to exceed the
  pre-approved dollar limits for
  these services (see general
  Audit Committee approval policy
  below for details on obtaining
  specific approvals)

o Specific approval is
  needed to use the Fund's
  auditors for "Synergistic" or
  "Unique Qualifications" Other
  Services not denoted as
  pre-approved to the left, or to
  add a specific service
  subcategory as "pre-approved"
------------------------------------- --------------------------




                     SECTION III - POLICY DETAIL, CONTINUED

----------------------- ------------------------- -----------------------------------------------
   SERVICE CATEGORY         SERVICE CATEGORY        SPECIFIC PROHIBITED SERVICE SUBCATEGORIES
                              DESCRIPTION
----------------------- ------------------------- -----------------------------------------------
                                            
PROHIBITED  SERVICES    Services which result     1. Bookkeeping or other services
                        in the auditors losing       related to the accounting records or
                        independence status          financial statements of the audit
                        under the Rule.              client*
                                                  2. Financial information systems design
                                                     and implementation*
                                                  3. Appraisal or valuation services,
                                                     fairness* opinions, or
                                                     contribution-in-kind reports
                                                  4. Actuarial services (i.e., setting
                                                     actuarial reserves versus actuarial
                                                     audit work)*
                                                  5. Internal audit outsourcing services*
                                                  6. Management functions or human
                                                     resources
                                                  7. Broker or dealer, investment
                                                     advisor, or investment banking services
                                                  8. Legal services and expert services
                                                     unrelated to the audit
                                                  9. Any other service that the Public
                                                     Company Accounting Oversight Board
                                                     determines, by regulation, is
                                                     impermissible
----------------------- ------------------------- -----------------------------------------------

------------------------------------------- ------------------------------
     AUDIT COMMITTEE APPROVAL POLICY               AUDIT COMMITTEE
                                                  REPORTING POLICY
------------------------------------------- ------------------------------
o These services are not to be              o A summary of all
  performed with the exception of the(*)      services and related
  services that may be permitted              fees reported at each
  if they would not be subject to audit       regularly scheduled
  procedures at the audit client (as          Audit Committee meeting
  defined in rule 2-01(f)(4)) level           will serve as continual
  the firm providing the service.             confirmation that has
  				              not provided any
                                              restricted services.
------------------------------------------- ------------------------------

--------------------------------------------------------------------------------
GENERAL AUDIT COMMITTEE APPROVAL POLICY:
o For all projects, the officers of the Funds and the Fund's auditors will each
  make an assessment to determine that any proposed projects will not impair
  independence.

o Potential services will be classified into the four non-restricted service
  categories and the "Approval of Audit, Audit-Related, Tax and Other
  Services" Policy above will be applied. Any services outside the specific
  pre-approved service subcategories set forth above must be specifically
  approved by the Audit Committee.

o At least quarterly, the Audit Committee shall review a report summarizing the
  services by service category, including fees, provided by the Audit firm as
  set forth in the above policy.

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


    (2) Disclose the percentage of services described in each of paragraphs (b)
   through (d) of this Item that were approved by the audit committee pursuant
   to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

N/A


(f) If greater than 50 percent, disclose the percentage of hours expended on the
principal accountants engagement to audit the registrant's financial statements
for the most recent fiscal year that were attributed to work performed by
persons other than the principal accountant's full-time, permanent employees.

N/A

(g) Disclose the aggregate non-audit fees billed by the registrants accountant
for services rendered to the registrant, and rendered to the registrants
investment adviser (not including any sub-adviser whose role is primarily
portfolio management and is subcontracted with or overseen by another investment
adviser), and any entity controlling, controlled by, or under common control
with the adviser that provides ongoing services to the registrant for each of
the last two fiscal years of the registrant.

N/A

(h) Disclose whether the registrants audit committee of the board of trustees
has considered whether the provision of non-audit services that were rendered to
the registrants investment adviser (not including any subadviser whose role is
primarily portfolio management and is subcontracted with or overseen by another
investment adviser), and any entity controlling, controlled by, or under common
control with the investment adviser that provides ongoing services to the
registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of
Rule 2-01 of Regulation S-X is compatible with maintaining the principal
accountant's independence.

The Fund's audit committee of the Board of Trustees
has considered whether the provision of non-audit
services that were rendered to the Affiliates (as
defined) that were not pre- approved pursuant to
paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is
compatible with maintaining the principal accountant's
independence.

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS

(a) If the registrant is a listed issuer as defined in Rule 10A-3
under the Exchange Act (17 CFR 240.10A-3), state whether
or not the registrant has a separately-designated standing
 audit committee established in accordance with Section
3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)).
If the registrant has such a committee, however designated,
identify each committee member. If the entire board of directors
is acting as the registrant's audit committee as specified in
Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)),
so state.

N/A

(b) If applicable, provide the disclosure required by Rule 10A-3(d)
under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption
from the listing standards for audit committees.

N/A

ITEM 6. SCHEDULE OF INVESTMENTS.

File Schedule of Investments in securities of unaffiliated issuers
as of the close of the reporting period as set forth in 210.1212
of Regulation S-X [17 CFR 210.12-12], unless the schedule is
included as part of the report to shareholders filed under Item
1 of this Form.

Included in Item 1


ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR
CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

A closed-end management investment company that is filing an annual report on
this Form N-CSR must, unless it invests exclusively in non-voting securities,
describe the policies and procedures that it uses to determine how to vote
proxies relating to portfolio securities, including the procedures that the
company uses when a vote presents a conflict between the interests of its
shareholders, on the one hand, and those of the company's investment adviser;
principal underwriter; or any affiliated person (as defined in Section 2(a)(3)
of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules
thereunder) of the company, its investment adviser, or its principal
underwriter, on the other. Include any policies and procedures of the company's
investment adviser, or any other third party, that the company uses, or that are
used on the company's behalf, to determine how to vote proxies relating to
portfolio securities.

Not applicable to open-end management investment companies.



ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

(a) If the registrant is a closed-end management investment company that
is filing an annual report on this Form N-CSR,provide the following
information:
(1) State the name, title, and length of service of the person or persons
employed by or associated with the registrant or an investment adviser
of the registrant who are primarily responsible for the day-to-day management
of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio
Manager's business experience during the past 5 years.


Not applicable to open-end management investment companies.


ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT
INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

(a) If the registrant is a closed-end management investment company,
in the following tabular format, provide the information specified in
paragraph (b) of this Item with respect to any purchase made by or on
behalf of the registrant or any affiliated purchaser, as defined in
Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of
shares or other units of any class of the registrant's equity securities
that is registered by the registrant pursuant to Section 12 of the
Exchange Act (15 U.S.C. 781).

Not applicable to open-end management investment companies.


ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

Describe any material changes to the procedures by which shareholders
may recommend nominees to the registrant's board of directors, where
those changes were implemented after the registrant last provided
disclosure in response to the requirements of Item 407(c)(2)(iv) of
Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15))
of Schedule 14A (17 CFR 240.14a-101), or this Item.


There have been no material changes to the procedures by which the
shareholders may recommend nominees to the registrant's board of
directors since the registrant last provided disclosure in response
to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A)
in its definitive proxy statement, or this item.


ITEM 11. CONTROLS AND PROCEDURES.

(a) Disclose the conclusions of the registrant's principal executive and
principal financials officers, or persons performing similar functions,
regarding the effectiveness of the registrant's disclosure
controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR
270.30a-3(c))) as of a date within 90 days of the filing date of the report
that includes the disclosure required by this paragraph,
based on the evaluation of these controls and procedures required by Rule
30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b)
under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)).

The registrant's principal executive officer
and principal financial officer have
concluded that the registrant's disclosure
controls and procedures are effective based
on the evaluation of these controls and
procedures as of a date within 90 days of the
filing date of this report.


(b) Disclose any change in the registrant's internal control over financial
reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that
occured during the second fiscal quarter of the period covered by this report
that has materially affected, or is reasonably likely to materially affect,
the registrant's internal control over financial reporting.

There were no significant changes in the
registrant's internal control over financial
reporting that occurred during the second
fiscal quarter of the period covered by this
report that have materially affected, or are
reasonably likely to materially affect, the
registrant's internal control over financial
reporting.

The registrant's principal executive officer and principal financial
officer, however, voluntarily are reporting the following information:

In August of 2006 the registrant's investment adviser
enhanced its internal procedures for reporting performance
information required to be included in prospectuses.
Those enhancements involved additional internal controls
over the appropriateness of performance data
generated for this purpose.  Such enhancements were made
following an internal review which identified
prospectuses relating to certain classes of shares of
a limited number of registrants where, inadvertently,
performance information not reflecting the deduction of
applicable sales charges was included. Those prospectuses
were revised, and the revised prospectuses were distributed to
shareholders.


ITEM 12. EXHIBITS.

(a) File the exhibits listed below as part of this Form. Letter or number the
exhibits in the sequence indicated.

(1) Any code of ethics, or amendment thereto, that is the subject of the
disclosure required by Item 2, to the extent that the registrant intends to
satisfy the Item 2 requirements through filing of an exhibit.



(2) A separate certification for each principal executive officer and principal
financial officer of the registrant as required by Rule 30a-2(a) under the Act
(17 CFR 270.30a-2(a)) , exactly as set forth below:

Filed herewith.





                                   SIGNATURES

                          [See General Instruction F]


Pursuant to the requirements of the Securities Exchange Act of 1934 and 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 Series Trust VIII


By (Signature and Title)* /s/ Lisa M. Jones
Lisa M. Jones, President & Chief Executive Officer

Date July 28, 2017


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on the
dates indicated.


By (Signature and Title)* /s/ Lisa M. Jones
Lisa M. Jones, President & Chief Executive Officer

Date July 28, 2017


By (Signature and Title)* /s/ Mark E. Bradley
Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer

Date July 28, 2017

* Print the name and title of each signing officer under his or her signature.