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 811-07870

                          Pioneer Real Estate Shares
               (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:  December 31


Date of reporting period:  January 1, 2016 through December 31, 2016


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 Real
                       Estate Shares

--------------------------------------------------------------------------------
                       Annual Report | December 31, 2016
--------------------------------------------------------------------------------

                       Ticker Symbols:

                       Class A     PWREX
                       Class C     PCREX
                       Class Y     PYREX

                       [LOGO] PIONEER
                              Investments(R)


                      visit us: us.pioneerinvestments.com


Table of Contents


                                                                          
President's Letter                                                            2

Portfolio Management Discussion                                               4

Portfolio Summary                                                            10

Prices and Distributions                                                     11

Performance Update                                                           12

Comparing Ongoing Fund Expenses                                              15

Schedule of Investments                                                      17

Financial Statements                                                         20

Notes to Financial Statements                                                27

Report of Independent Registered Public Accounting Firm                      34

Approval of Investment Advisory and Sub-Advisory Agreements                  36

Trustees, Officers and Service Providers                                     41


                         Pioneer Real Estate Shares | Annual Report | 12/31/16 1


President's Letter

Dear Shareowner,

The 2016 calendar year featured many swings in market sentiment, both in the
equity and fixed-income markets. After a slow start to the year, the markets
began to rally in mid-February 2016 with a recovery in the prices of oil and
other commodities, as well as slow, positive progress in US employment figures.
The rally persisted throughout much of the remaining 10 months of 2016, gaining
further momentum in the second half of the year when US gross domestic product
(GDP) growth showed solid improvement during the third quarter and unemployment
continued to decline. Finally, in November, the election of Donald Trump as the
45th President of the United States sparked a dramatic late-year market upturn
that saw US equities briefly climb to all-time highs. Speculation that the new
Trump administration's policies would stimulate the US economy through reduced
taxes, less regulation, and increased government spending on infrastructure,
fueled the year-end rally. For the full 12 months ended December 31, 2016, the
Standard & Poor's 500 Index, a broad measure of US stock market performance,
returned a strong 11.9%.

In bond markets, the Federal Reserve Board's (the Fed's) 0.25% hike in the
Federal funds rate in December 2016, its first rate increase in a year,
contributed to a sell-off in US Treasuries. The pullback from Treasuries also
derived from the market's increased inflation and growth expectations under the
incoming Trump administration. Elsewhere within fixed income, corporate credit,
particularly in the high-yield segment of the market, performed well over the
fourth quarter and the full calendar year. US high-yield securities, as measured
by the Bank of America Merrill Lynch US High Yield Index, returned a robust
17.5% for the 12 months ended December 31, 2016, with a rally in the energy
sector following the recovery in oil and other commodity prices last February
bolstering the high-yield market's performance. Meanwhile, the Bloomberg
Barclays US Aggregate Bond Index, which tracks the performance of Treasury and
agency issues, corporate bond issues, and mortgage-backed securities, returned
2.7% for the same 12-month period, reflecting the relative weakness in
government bonds.

The US economy's underlying fundamentals seem solid, and growth prospects for
2017 appear healthy. However, we remain concerned about risks to the economy of
potentially disruptive trade policies pursued by the Trump administration.
Barring a damaging trade war, though, we anticipate the Fed will continue to
hike short-term interest rates gradually during 2017. In addition, we expect the
Fed to consider carefully the potential economic effects of any fiscal policies
enacted by the new Trump administration and the Republican-controlled Congress.
In that regard, we believe President Trump's economic policies, if they come to
fruition, could help boost real GDP growth. However, the impact of Trump's
policies on US GDP may be greater in 2018 rather than in 2017. Still, even prior
to the late-year "Trump rally," US GDP growth appeared to settling in at a
sustainable annual pace of more than 2% as 2016 drew to a close, following some
weaker performance in the first half of the year. Continued improvement in the
employment market driven in part by gains in manufacturing output were among the
factors behind the bounce-back in GDP.

2 Pioneer Real Estate Shares | Annual Report | 12/31/16


While economic conditions inside the US appear solid, many economies around the
world continue to experience slow growth rates. Moreover, several countries in
various regions face a number of challenges in 2017 and beyond, including the
shifting geopolitics driving "Brexit" - the United Kingdom's pending exit from
the European Union - as well as related populist movements in Europe, limited
productivity gains, aging populations, and transitioning economic models in
China and other emerging markets. In recent years, global central banks have
kept interest rates at close to zero in an effort to stimulate economic growth.
While financial markets often benefited from the low rates, it now appears that
those policies may be losing their effectiveness, leaving central banks little
room to maneuver going forward. Moreover, the low interest rates have caused
government bond yields to plummet, presenting a dilemma for the income-oriented
investor.

Against this backdrop of still-low global interest rates, shifting priorities of
central banks, evolving demographics, and numerous geopolitical concerns, we
believe investors are likely to face ongoing challenges and much uncertainty
when it comes to finding opportunities for both income and capital appreciation.
While much has been made of passive investing as a possible source of stability
in this uncertain environment, it is our view that all investment decisions are
active choices. Throughout Pioneer's history, we have believed in the importance
of active management. During challenging market conditions, we view the value of
active management as even more compelling. Our experienced and tenured
investment teams focus 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
President and CEO
Pioneer Investment Management USA Inc.
December 31, 2016

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. These statements should not
be relied upon for any other purposes. Past performance is no guarantee of
future results, and there is no guarantee that market forecasts discussed will
be realized.

                         Pioneer Real Estate Shares | Annual Report | 12/31/16 3


Portfolio Management Discussion | 12/31/16

In the following interview, Matthew Troxell of AEW Capital Management, L.P.,
discusses the market environment for real estate-related investments and the
performance of Pioneer Real Estate Shares during the 12-month reporting period
ended December 31, 2016. AEW Capital Management, L.P. (AEW), a real estate
investment advisory firm, is the Fund's investment sub-adviser. Day-to-day
management of the Fund's portfolio is the responsibility of Matthew A. Troxell,
CFA (portfolio manager of the Fund since 2004). Mr. Troxell is a managing
director and senior portfolio manager at AEW. Mr. Troxell is supported by three
portfolio managers: J. Hall Jones, Jr., CFA, director of AEW (co-portfolio
manager of the Fund since 2012), Gina Szymanski, CFA, director of AEW
(co-portfolio manager of the Fund since 2017), and John A. Garofalo, CFA,
director of AEW (co-portfolio manager of the Fund since 2014).

Q    How did the Fund perform during the 12-month period ended December 31,
     2016?

A    Pioneer Real Estate Shares Class A shares returned 6.10% at net asset value
     during the 12-month period ended December 31, 2016, while the Fund's
     benchmark, the Morgan Stanley Capital International (MSCI) U.S. Real Estate
     Investment Trust (REIT) Index (the MSCI Index)(1), returned 8.60%. During
     the same period, the average return of the 267 mutual funds in Lipper's
     Real Estate Funds Category was 7.03%, and the average return of the 267
     mutual funds in Morningstar's Real Estate Funds Category was 6.89%.

Q    How would you describe the market environment for REIT investors during the
     12-month period ended December 31, 2016?

A    Against a backdrop of low interest rates and a slowly improving U.S.
     economy, REITs outperformed the broader equity market for the first nine
     months of 2016. With REITs also yielding more than money market investments
     and most fixed-income alternatives, the asset class saw solid

(1)  The MSCI information may only be used for your internal use, may not be
     reproduced or redisseminated 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 Real Estate Shares | Annual Report | 12/31/16


     demand. However, with the fourth quarter coming into focus and the
     likelihood of the Federal Reserve (the Fed) raising its benchmark rate
     before year-end, investors lost enthusiasm for the asset class due to fears
     of higher interest rates and higher borrowing costs. Despite losing ground
     during the fourth quarter, REITs still ended 2016 in positive territory
     after a strong rebound in late December. Investors took a measure of
     comfort from the Fed's guidance for two-to-three additional hikes in 2017,
     which were estimated to total 0.75%.

     Given the incoming President Trump's proposed legislative agenda, the hotel
     sector strongly outperformed the overall REIT sector following the U.S.
     elections in November through December 31, 2016, as market expectations for
     stronger economic growth led investors to believe demand for hotel space
     will rise. Health care was among the weakest-performing REIT sectors
     following the November elections, given the expectations that the
     Affordable Care Act will either be significantly reformed, or repealed
     altogether and replaced with a new law.

Q    Which investments or strategies detracted from the Fund's
     benchmark-relative performance during the 12-month period ended December
     31, 2016?

A    The Fund's underperformance relative to the MSCI Index benchmark during the
     12-month period was due to negative sector allocation results, which were
     partially offset by positive stock selection results. Sector allocation had
     a negative impact on benchmark-relative performance primarily due to the
     portfolio's underweight positions in the outperforming data center and
     triple-net-lease sectors, and an overweight position in the underperforming
     regional mall sector. In terms of stock selection, benchmark-relative
     results were weakest for the Fund in the office, hotel, and manufactured
     home sectors.

     Among individual REITs held in the portfolio, the top detractors from the
     Fund's benchmark-relative performance included overweight positions in the
     underperforming CubeSmart (storage) and Taubman Centers (regional malls),
     and an underweight position in the outperforming Digital Realty (office).
     Storage REITs such as CubeSmart lagged during the 12-month period as
     investors became concerned about moderating growth in the sector as well as
     increased new supply. We still like CubeSmart's relative value, however,
     and continue to hold the overweight position in the portfolio. In the
     regional mall sector, Taubman Centers underperformed after management
     announced a $500 million renovation project at one of its

                         Pioneer Real Estate Shares | Annual Report | 12/31/16 5


     assets in Los Angeles, which the market viewed as a defensive move against
     competitor Westfield, which is investing $800 million in one of its nearby
     assets. In addition, concerns that e-Commerce would threaten holiday retail
     sales at traditional "brick and mortar" properties and increase the
     potential for store closures after the holiday season contributed to the
     decline in Taubman's value. We still like the company's relative valuation,
     though, and have maintained the Fund's overweight position. Technology
     demand for data centers remained strong during the period, and solid
     fundamentals drove the data center sector to outperform during the 12-month
     period. As a result, the portfolio's underweight to Digital Realty was a
     detractor from the Fund's benchmark-relative returns, but that negative was
     more than offset by an overweight position in Digital Realty's peer
     company, DuPont Fabros Technology.

Q    Which investments or strategies aided the Fund's benchmark-relative
     performance during the 12-month period ended December 31, 2016?

A    In terms of stock selection, benchmark-relative results were strongest for
     the Fund in the data center, health care, and apartment REIT sectors. Among
     individual portfolio holdings, the top contributors to the Fund's
     benchmark-relative performance during the period included overweight
     positions in the aforementioned DuPont Fabros Technology, which
     outperformed, and Rexford Industrial Realty. In addition, our avoidance of
     the underperforming HCP (health care) aided benchmark-relative results.

     As noted earlier, technology demand for data center REITs was strong in
     2016, and solid fundamentals drove the data center sector to outperform the
     general REIT market. As a result, the Fund's overweight to DuPont Fabros
     Technology contributed to benchmark-relative returns. Additionally, DuPont
     Fabros continued to acquire land and grow its development pipeline.

Q    Did you make any adjustments to the Fund's strategy or sector allocations
     during the 12-month period ended December 31, 2016?

A    We did not make any significant changes to the Fund's investment strategy
     during the 12-month period, although our investment decisions did result in
     some shift in sector weightings. Based upon property market fundamentals
     and relative valuations within the REIT sector, the Fund's largest
     overweights as of December 31, 2016, were in the diversified, regional
     mall, and apartment sectors. The Fund continued to have its largest

6 Pioneer Real Estate Shares | Annual Report | 12/31/16


     underweights to the triple-net-lease and health care sectors, as the fixed-
     lease structures of those sectors makes their cash flows the most bond-like
     in an environment of rising interest rates.

Q    Did the Fund invest in any derivative securities during the 12-month period
     ended December 31, 2016?

A    No, we did not invest the Fund's portfolio in any derivatives during the
     period.

Q    What is your outlook for REITs as 2017 begins, particularly where the new
     Trump administration's proposed policies are concerned?

A    With the U.S. economy already near full employment, the new
     administration's plan for a substantial infrastructure initiative and large
     tax cuts financed by deficit spending could put additional upward pressure
     on inflation and interest rates. The exact shapes of those spending and tax
     plans still need to be negotiated with Congress, and while Congress is in
     Republican hands, there may be some differences of opinion between Capitol
     Hill and the White House on what the highest priorities should be. As a
     result, while we do not expect sharp increases in interest rates and
     inflation from today's levels, we believe the risk is somewhat higher under
     a Trump administration than it was under the gridlocked government the U.S.
     essentially had from 2011 onward. Additionally, construction costs would
     likely rise if increased infrastructure spending becomes a reality, but
     that should help keep new supply in the REIT market under control.

     At the end of 2016, the REIT market continued to trade within a fair-value
     range versus other asset classes. REITs were trading at an average 5%
     discount to net asset values as of December 31, 2016, with some sectors
     trading at much larger discounts and some at significant premiums. REITs
     continued to be most attractive relative to bonds on a yield-spread basis,
     though the upward move in bond yields ate into that cushion a bit following
     the U.S. election. (Yield, or credit spreads are commonly defined as the
     differences in yield between Treasuries and other types of fixed-income
     securities with similar maturities.) Even so, REIT dividends* looked more
     attractive than usual compared with bonds, on a yield-spread basis. REITs
     continue to look most expensive compared with equities on a multiples
     basis.

     With interest rates moving up, we expect investors to pay increased
     attention to the factors that differentiate REIT returns from bond returns.
     Most notably, the fact that REIT incomes rise faster in a more rapidly

*    Dividends are not guaranteed.

                         Pioneer Real Estate Shares | Annual Report | 12/31/16 7


     growing economy, and that rising rents and property values have tended to
     help offset inflation. We believe some investors will inevitably lump REITs
     in with bonds and react negatively to increases in interest rates; however,
     it is important to note that rate increases are likely sustainable only if
     the economy is growing. Therefore, a more sophisticated view factors in the
     higher earnings growth that is likely to accompany any meaningful
     improvement in the economy.

8 Pioneer Real Estate Shares | Annual Report | 12/31/16


Please refer to the Schedule of Investments on pages 17-19 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.

The Fund invests in REIT securities, the value of which can fall for a variety
of reasons, such as declines in rental income, fluctuating interest rates, poor
property management, environmental liabilities, uninsured damage, increased
competition, or changes in real estate tax laws.

The Fund invests in a limited number of securities and, as a result, the Fund's
performance may be more volatile than the performance of other funds holding
more securities.

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 Pioneer Investments 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.

                         Pioneer Real Estate Shares | Annual Report | 12/31/16 9


Portfolio Summary | 12/31/16

Sector Distribution
--------------------------------------------------------------------------------
(As a percentage of equity holdings)

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



                                                                        
Apartment                                                                  17.1%
Regional Mall                                                              14.1%
Office                                                                     11.1%
Health Care                                                                 9.4%
Industrial                                                                  8.4%
Shopping Center                                                             8.2%
Diversified                                                                 7.7%
Hotel                                                                       7.4%
Storage                                                                     7.3%
Triple Net Lease                                                            4.7%
Data Center                                                                 3.4%
Manufactured Home                                                           1.2%


10 Largest Holdings*
--------------------------------------------------------------------------------
(As a percentage of equity holdings)



                                                                        
 1. Simon Property Group, Inc.                                             8.86%
--------------------------------------------------------------------------------
 2. Prologis, Inc.                                                         5.83
--------------------------------------------------------------------------------
 3. Equity Residential Property Trust, Inc.                                5.29
--------------------------------------------------------------------------------
 4. AvalonBay Communities, Inc.                                            5.24
--------------------------------------------------------------------------------
 5. Boston Properties, Inc.                                                5.06
--------------------------------------------------------------------------------
 6. Welltower, Inc.                                                        5.00
--------------------------------------------------------------------------------
 7. Public Storage, Inc.                                                   4.76
--------------------------------------------------------------------------------
 8. Ventas, Inc.                                                           4.41
--------------------------------------------------------------------------------
 9. Taubman Centers, Inc.                                                  3.61
--------------------------------------------------------------------------------
10. Host Hotels & Resorts, Inc.                                            3.49
--------------------------------------------------------------------------------


*    This list excludes temporary cash investments and derivative instruments.
     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.

10 Pioneer Real Estate Shares | Annual Report | 12/31/16


Prices and Distributions | 12/31/16

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



--------------------------------------------------------------------------------
         Class                      12/31/16                      12/31/15
--------------------------------------------------------------------------------
                                                             
           A                         $25.79                        $26.83
--------------------------------------------------------------------------------
           C                         $25.30                        $26.38
--------------------------------------------------------------------------------
           Y                         $25.76                        $26.79
--------------------------------------------------------------------------------


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



--------------------------------------------------------------------------------
                                           Short-Term          Long-Term
         Class          Dividends         Capital Gains       Capital Gains
--------------------------------------------------------------------------------
                                                        
           A             $0.2944             $0.0258             $2.2828
--------------------------------------------------------------------------------
           C             $0.0779             $0.0258             $2.2828
--------------------------------------------------------------------------------
           Y             $0.3800             $0.0258             $2.2828
--------------------------------------------------------------------------------


Index Definition
--------------------------------------------------------------------------------
The MSCI U.S. REIT Index is an unmanaged, widely used index comprising a broad
representation of the most actively traded real estate trusts, and is designed
to be a measure of real estate equity performance. 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 12-14.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 11


Performance Update | 12/31/16                                     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 Real Estate Shares at public
offering price during the periods shown, compared to that of the Morgan Stanley
Capital International (MSCI) U.S. REIT Index.



Average Annual Total Returns
(As of December 31, 2016)
--------------------------------------------------------------------------------
                    Net           Public
                    Asset         Offering      MSCI
                    Value         Price         U.S. REIT
Period              (NAV)         (POP)         Index
--------------------------------------------------------------------------------
                                       
10 years             4.26%         3.64%         4.96%
5 years             10.92          9.61         11.86
1 year               6.10         -0.01          8.60
--------------------------------------------------------------------------------


Expense Ratio
(Per prospectus dated May 1, 2016)
--------------------------------------------------------------------------------
                    Gross
--------------------------------------------------------------------------------
                 
                    1.41%
--------------------------------------------------------------------------------


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

Value of $10,000 Investment



                        Pioneer Real           MCSI U.S.
                        Estate Shares          REIT Index
                                         
12/06                   $ 9,425                $10,000
12/07                   $ 7,596                $ 8,318
12/08                   $ 4,687                $ 5,160
12/09                   $ 6,100                $ 6,636
12/10                   $ 7,823                $ 8,526
12/11                   $ 8,519                $ 9,267
12/12                   $ 9,860                $10,914
12/13                   $ 9,972                $11,183
12/14                   $12,927                $14,581
12/15                   $13,478                $14,948
12/16                   $14,300                $16,234


Call 1-800-225-6292 or visit us.pioneerinvestments.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 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 Real Estate Shares | Annual Report | 12/31/16


Performance Update | 12/31/16                                     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 Real Estate Shares during the
periods shown, compared to that of the Morgan Stanley Capital International
(MSCI) U.S. REIT Index.



Average Annual Total Returns
(As of December 31, 2016)
--------------------------------------------------------------------------------
                                                MSCI
                    If            If            U.S. REIT
Period              Held          Redeemed      Index
--------------------------------------------------------------------------------
                                       
10 years            3.36%         3.36%          4.96%
5 years             9.97          9.97          11.86
1 year              5.22          5.22           8.60
--------------------------------------------------------------------------------


Expense Ratio
(Per prospectus dated May 1, 2016)
--------------------------------------------------------------------------------
                    Gross
--------------------------------------------------------------------------------
                 
                    2.24%
--------------------------------------------------------------------------------


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

Value of $10,000 Investment



                        Pioneer Real           MCSI U.S.
                        Estate Shares          REIT Index
                                         
12/06                   $10,000                $10,000
12/07                   $ 7,993                $ 8,318
12/08                   $ 4,888                $ 5,160
12/09                   $ 6,299                $ 6,636
12/10                   $ 8,005                $ 8,526
12/11                   $ 8,651                $ 9,267
12/12                   $ 9,927                $10,914
12/13                   $ 9,954                $11,183
12/14                   $12,790                $14,581
12/15                   $13,224                $14,948
12/16                   $13,914                $16,234


Call 1-800-225-6292 or visit us.pioneerinvestments.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 you paid a 1% sales charge, your returns would
be lower than those shown above. "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 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 Real Estate Shares | Annual Report | 12/31/16 13


Performance Update | 12/31/16                                     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 Real Estate Shares during the
periods shown, compared to that of the Morgan Stanley Capital International
(MSCI) U.S. REIT Index.



Average Annual Total Returns
(As of December 31, 2016)
--------------------------------------------------------------------------------
                    Net
                    Asset         MSCI U.S.
                    Value         REIT
Period              (NAV)         Index
--------------------------------------------------------------------------------
                            
10 years             4.82%         4.96%
5 years             11.38         11.86
1 year               6.47          8.60
--------------------------------------------------------------------------------


Expense Ratio
(Per prospectus dated May 1, 2016)
--------------------------------------------------------------------------------
                    Gross
--------------------------------------------------------------------------------
                 
                    1.02%
--------------------------------------------------------------------------------


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

Value of $5 Million Investment



                        Pioneer Real           MCSI U.S.
                        Estate Shares          REIT Index
                                         
12/06                   $5,000,000             $5,000,000
12/07                   $4,048,617             $4,159,215
12/08                   $2,514,312             $2,579,970
12/09                   $3,303,270             $3,318,071
12/10                   $4,260,300             $4,263,007
12/11                   $4,669,072             $4,633,582
12/12                   $5,429,372             $5,456,755
12/13                   $5,516,691             $5,591,602
12/14                   $7,183,805             $7,290,317
12/15                   $7,517,528             $7,474,053
12/16                   $8,003,957             $8,116,785


Call 1-800-225-6292 or visit us.pioneerinvestments.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 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.

14 Pioneer Real Estate Shares | Annual Report | 12/31/16


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 Real Estate Shares

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



--------------------------------------------------------------------------------
Share Class                             A                 C                Y
--------------------------------------------------------------------------------
                                                              
Beginning Account                   $1,000.00         $1,000.00        $1,000.00
Value on 7/1/16
--------------------------------------------------------------------------------
Ending Account                      $  959.75         $  955.68        $  961.27
Value on 12/31/16
--------------------------------------------------------------------------------
Expenses Paid                       $    6.95         $   10.91        $    5.28
During Period*
--------------------------------------------------------------------------------


*    Expenses are equal to the Fund's annualized net expense ratio of 1.41%,
     2.22%, and 1.07% for Class A, Class C, and Class Y shares, respectively,
     multiplied by the average account value over the period, multiplied by
     184/366 (to reflect the one-half year period).

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 15


Comparing Ongoing Fund Expenses (continued)

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) 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 Real Estate Shares

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



--------------------------------------------------------------------------------
Share Class                             A                 C                Y
--------------------------------------------------------------------------------
                                                              
Beginning Account                   $1,000.00         $1,000.00        $1,000.00
Value on 7/1/16
--------------------------------------------------------------------------------
Ending Account                      $1,018.05         $1,013.98        $1,019.76
Value on 12/31/16
--------------------------------------------------------------------------------
Expenses Paid                       $    7.15         $   11.24        $    5.43
During Period*
--------------------------------------------------------------------------------


*    Expenses are equal to the Fund's annualized net expense ratio of 1.41%,
     2.22%, and 1.07% for Class A, Class C, and Class Y shares, respectively,
     multiplied by the average account value over the period, multiplied by
     184/366 (to reflect the one-half year period).

16 Pioneer Real Estate Shares | Annual Report | 12/31/16


Schedule of Investments | 12/31/16



-------------------------------------------------------------------------------------
Shares                                                                 Value
-------------------------------------------------------------------------------------
                                                                    
             COMMON STOCKS -- 98.2%
             CONSUMER SERVICES -- 1.6%
             Hotels, Resorts & Cruise Lines -- 1.6%
  145,100    Extended Stay America, Inc.                               $    2,343,365
                                                                       --------------
             Total Consumer Services                                   $    2,343,365
-------------------------------------------------------------------------------------
             REAL ESTATE -- 96.6%
             Diversified REIT -- 10.8%
   72,000    American Assets Trust, Inc.                               $    3,101,760
  120,600    Empire State Realty Trust, Inc.                                2,434,914
  146,100    Forest City Enterprises LP                                     3,044,724
  399,600    Gramercy Property Trust                                        3,668,328
   70,500    STORE Capital Corp.                                            1,742,055
   52,700    Washington Real Estate Investment Trust                        1,722,763
                                                                       --------------
                                                                       $   15,714,544
-------------------------------------------------------------------------------------
             Industrial REIT -- 8.3%
  157,200    Prologis, Inc.                                            $    8,298,588
  158,300    Rexford Industrial Realty, Inc.                                3,670,977
                                                                       --------------
                                                                       $   11,969,565
-------------------------------------------------------------------------------------
             Hotel & Resort REIT -- 5.6%
   68,500    Chatham Lodging Trust                                     $    1,407,675
  263,700    Host Hotels & Resorts, Inc.                                    4,968,108
   71,300    RLJ Lodging Trust                                              1,746,137
                                                                       --------------
                                                                       $    8,121,920
-------------------------------------------------------------------------------------
             Office REIT -- 11.2%
   57,300    Boston Properties, Inc.                                   $    7,207,194
   55,800    Douglas Emmett, Inc.                                           2,040,048
   64,714    Easterly Government Properties, Inc.                           1,295,574
  195,000    Piedmont Office Realty Trust, Inc.                             4,077,450
   15,300    Vornado Realty Trust                                           1,596,861
                                                                       --------------
                                                                       $   16,217,127
-------------------------------------------------------------------------------------
             Health Care REIT -- 9.2%
  100,500    Ventas, Inc.                                              $    6,283,260
  106,400    Welltower, Inc.                                                7,121,352
                                                                       --------------
                                                                       $   13,404,612
-------------------------------------------------------------------------------------
             Residential REITs -- 18.0%
   50,300    American Campus Communities, Inc.                         $    2,503,431
  112,900    American Homes 4 Rent                                          2,368,642
   42,100    AvalonBay Communities, Inc.                                    7,458,015
   53,900    Camden Property Trust                                          4,531,373
   24,200    Equity LifeStyle Properties, Inc.                              1,744,820
  117,000    Equity Residential Property Trust, Inc.                        7,530,120
                                                                       --------------
                                                                       $   26,136,401
-------------------------------------------------------------------------------------


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

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 17


Schedule of Investments | 12/31/16 (continued)



-------------------------------------------------------------------------------------
Shares                                                                 Value
-------------------------------------------------------------------------------------
                                                                 
             Retail REIT -- 21.9%
   69,000    Acadia Realty Trust                                       $    2,254,920
  112,900    DDR Corp.                                                      1,723,983
   25,200    Federal Realty Investment Trust                                3,581,172
  152,300    Retail Properties of America, Inc.                             2,334,759
   71,000    Simon Property Group, Inc.                                    12,614,570
   50,000    Tanger Factory Outlet Centers, Inc.                            1,789,000
   69,500    Taubman Centers, Inc.                                          5,138,135
   32,200    The Macerich Co.                                               2,281,048
                                                                       --------------
                                                                       $   31,717,587
-------------------------------------------------------------------------------------
             Specialized REIT -- 10.6%
  136,600    CubeSmart                                                 $    3,656,782
   11,100    Digital Realty Trust, Inc.                                     1,090,686
   86,000    DuPont Fabros Technology, Inc.                                 3,777,980
   30,300    Public Storage, Inc.                                           6,772,050
                                                                       --------------
                                                                       $   15,297,498
-------------------------------------------------------------------------------------
             Diversified Real Estate Activities -- 1.0%
   33,000    Alexander & Baldwin, Inc.                                 $    1,480,710
                                                                       --------------
             Total Real Estate                                         $  140,059,964
-------------------------------------------------------------------------------------
             TOTAL COMMON STOCKS
             (Cost $79,360,449)                                        $  142,403,329
-------------------------------------------------------------------------------------
             TOTAL INVESTMENT IN SECURITIES -- 98.2%
             (Cost $79,360,449) (a)                                    $  142,403,329
-------------------------------------------------------------------------------------
             OTHER ASSETS & LIABILITIES -- 1.8%                        $    2,574,783
-------------------------------------------------------------------------------------
             NET ASSETS -- 100.0%                                      $  144,978,112
=====================================================================================


REIT    Real Estate Investment Trust.

(a)     At December 31, 2016, the net unrealized appreciation on investments
        based on cost for federal income tax purposes of $81,400,648 was as
        follows:



                                                                        
          Aggregate gross unrealized appreciation for all investments in
            which there is an excess of value over tax cost                $61,540,466

          Aggregate gross unrealized depreciation for all investments in
            which there is an excess of tax cost over value                   (537,785)
                                                                           -----------
          Net unrealized appreciation                                      $61,002,681
                                                                           ===========


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

18 Pioneer Real Estate Shares | Annual Report | 12/31/16


Purchases and sales of securities (excluding temporary cash investments) for the
year ended December 31, 2016 aggregated to $23,622,872 and $39,510,378,
respectively.

The Fund is permitted to engage in purchase and sale transactions ("cross
trades") with certain funds and accounts for which 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 year ended December 31, 2016, 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 following is a summary of the inputs used as of December 31, 2016, in
valuing the Fund's investments:



------------------------------------------------------------------------------------
                             Level 1          Level 2     Level 3       Total
------------------------------------------------------------------------------------
                                                            
Common Stocks                $142,403,329     $    --     $    --       $142,403,329
------------------------------------------------------------------------------------
Total                        $142,403,329     $    --     $    --       $142,403,329
====================================================================================


During the year ended December 31, 2016, there were no transfers between Levels
1, 2 and 3.

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

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 19


Statement of Assets and Liabilities | 12/31/16



                                                                
ASSETS:
   Investment in securities (cost $79,360,449)                     $142,403,329
   Cash                                                               1,900,900
   Receivables --
      Fund shares sold                                                  169,929
      Dividends                                                         658,070
   Other assets                                                          37,903
--------------------------------------------------------------------------------
         Total assets                                              $145,170,131
================================================================================
LIABILITIES:
   Payables --
      Fund shares repurchased                                      $     81,509
      Trustee fees                                                          112
      Transfer agent expense                                             50,118
      Audit expense                                                      30,449
      Printing expense                                                    7,241
      Custody expense                                                     2,448
   Due to affiliates                                                     12,687
   Accrued expenses                                                       7,455
--------------------------------------------------------------------------------
         Total liabilities                                         $    192,019
================================================================================
NET ASSETS:
   Paid-in capital                                                 $ 82,197,938
   Accumulated net realized loss on investments                        (262,706)
   Net unrealized appreciation on investments                        63,042,880
--------------------------------------------------------------------------------
         Net assets                                                $144,978,112
================================================================================
NET ASSET VALUE PER SHARE:
(No par value, unlimited number of shares authorized)
   Class A (based on $98,006,515/3,800,353 shares)                 $      25.79
   Class C (based on $13,317,060/526,270 shares)                   $      25.30
   Class Y (based on $33,654,537/1,306,620 shares)                 $      25.76
MAXIMUM OFFERING PRICE:
   Class A ($25.79 (divided by) 94.25%)                            $      27.36
================================================================================


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

20 Pioneer Real Estate Shares | Annual Report | 12/31/16


Statement of Operations

For the Year Ended 12/31/16



                                                                                 
INVESTMENT INCOME:
   Dividends                                                             $3,986,604
   Interest                                                                   4,650
---------------------------------------------------------------------------------------------------
         Total investment income                                                       $ 3,991,254
---------------------------------------------------------------------------------------------------
EXPENSES:
   Management fees                                                       $1,289,284
   Transfer agent fees
      Class A                                                               101,504
      Class C                                                                16,329
      Class Y                                                                30,592
   Distribution fees
      Class A                                                               255,456
      Class C                                                               127,900
   Shareholder communications expense                                       126,981
   Administrative expense                                                    92,171
   Custodian fees                                                             7,252
   Registration fees                                                         65,015
   Professional fees                                                         43,256
   Printing expense                                                          32,183
   Fees and expenses of nonaffiliated Trustees                                7,600
   Miscellaneous                                                             20,505
---------------------------------------------------------------------------------------------------
      Total expenses                                                                   $ 2,216,028
---------------------------------------------------------------------------------------------------
         Net investment income                                                         $ 1,775,226
---------------------------------------------------------------------------------------------------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS:
   Net realized gain (loss) on investments                                             $10,244,717
---------------------------------------------------------------------------------------------------
   Change in net unrealized appreciation (depreciation) on investments                 $(2,571,269)
---------------------------------------------------------------------------------------------------
   Net realized and unrealized gain (loss) on investments                              $ 7,673,448
---------------------------------------------------------------------------------------------------
   Net increase in net assets resulting from operations                                $ 9,448,674
===================================================================================================


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

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 21


Statements of Changes in Net Assets



------------------------------------------------------------------------------------------
                                                            Year Ended      Year Ended
                                                            12/31/16        12/31/15
------------------------------------------------------------------------------------------
                                                                      
FROM OPERATIONS:
Net investment income (loss)                                $   1,775,226   $   1,774,959
Net realized gain (loss) on investments                        10,244,717      20,178,398
Change in net unrealized appreciation (depreciation)
   on investments                                              (2,571,269)    (15,633,704)
------------------------------------------------------------------------------------------
   Net increase in net assets resulting from operations     $   9,448,674   $   6,319,653
------------------------------------------------------------------------------------------
DISTRIBUTIONS TO SHAREOWNERS:
Net investment income:
      Class A ($0.29 and $0.31 per share, respectively)     $  (1,098,478)  $  (1,094,537)
      Class C ($0.08 and $0.07 per share, respectively)           (36,163)        (32,391)
      Class Y ($0.38 and $0.41 per share, respectively)          (640,585)       (648,031)
Net realized gain:
      Class A ($2.31 and $3.60 per share, respectively)        (8,278,026)    (12,166,581)
      Class C ($2.31 and $3.60 per share, respectively)        (1,133,616)     (1,557,391)
      Class Y ($2.31 and $3.60 per share, respectively)        (3,020,300)     (5,547,206)
------------------------------------------------------------------------------------------
         Total distributions to shareowners                 $ (14,207,168)  $ (21,046,137)
------------------------------------------------------------------------------------------
FROM FUND SHARE TRANSACTIONS:
Net proceeds from sale of shares                            $  39,316,296   $  47,909,692
Reinvestment of distributions                                  12,866,042      17,744,523
Cost of shares repurchased                                    (64,471,467)    (59,973,585)
------------------------------------------------------------------------------------------
      Net increase (decrease) in net assets resulting from
         Fund share transactions                            $ (12,289,129)  $   5,680,630
------------------------------------------------------------------------------------------
      Net decrease in net assets                            $ (17,047,623)  $  (9,045,854)
NET ASSETS:
Beginning of year                                           $ 162,025,735   $ 171,071,589
------------------------------------------------------------------------------------------
End of year                                                 $ 144,978,112   $ 162,025,735
------------------------------------------------------------------------------------------


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

22 Pioneer Real Estate Shares | Annual Report | 12/31/16




----------------------------------------------------------------------------------------
                                Year Ended   Year Ended       Year Ended   Year Ended
                                12/31/16     12/31/16         12/31/15     12/31/15
                                Shares       Amount           Shares       Amount
----------------------------------------------------------------------------------------
                                                               
Class A
Shares sold                        548,497   $  15,173,981     652,528     $ 19,295,553
Reinvestment of distributions      354,722       9,121,612     484,285       12,902,018
Less shares repurchased           (861,528)    (23,647,114)   (999,506)     (29,197,159)
----------------------------------------------------------------------------------------
      Net increase                  41,691   $     648,479     137,307     $  3,000,412
========================================================================================
Class C
Shares sold                        126,874   $   3,392,404     145,974     $  4,288,730
Reinvestment of distributions       45,112       1,129,518      58,052        1,512,534
Less shares repurchased           (121,082)     (3,224,087)   (189,611)      (5,449,050)
----------------------------------------------------------------------------------------
      Net increase                  50,904   $   1,297,835      14,415     $    352,214
========================================================================================
Class Y
Shares sold                        765,126   $  20,749,911     839,619     $ 24,325,409
Reinvestment of distributions      101,246       2,614,912     124,978        3,329,971
Less shares repurchased         (1,375,179)    (37,600,266)   (859,493)     (25,327,376)
----------------------------------------------------------------------------------------
      Net increase (decrease)     (508,807)  $ (14,235,443)    105,104     $  2,328,004
========================================================================================


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

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 23


Financial Highlights



---------------------------------------------------------------------------------------------------------------------
                                                             Year        Year         Year       Year        Year
                                                             Ended       Ended        Ended      Ended       Ended
                                                             12/31/16    12/31/15     12/31/14   12/31/13    12/31/12
---------------------------------------------------------------------------------------------------------------------
                                                                                              
Class A
Net asset value, beginning of period                         $ 26.83     $  29.58     $  24.56   $ 24.76     $ 21.79
---------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                              $  0.30(a)  $   0.31(a)  $   0.30   $  0.23     $  0.45
   Net realized and unrealized gain (loss) on investments       1.26         0.85         6.86      0.06        2.97
---------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations           $  1.56     $   1.16     $   7.16   $  0.29     $  3.42
---------------------------------------------------------------------------------------------------------------------
Distribution to shareowners:
   Net investment income                                     $ (0.29)    $  (0.31)    $  (0.29)  $ (0.22)    $ (0.45)
   Net realized gain                                           (2.31)       (3.60)       (1.85)    (0.27)         --
---------------------------------------------------------------------------------------------------------------------
Total distributions                                          $ (2.60)    $  (3.91)    $  (2.14)  $ (0.49)    $ (0.45)
---------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                   $ (1.04)    $  (2.75)    $   5.02   $ (0.20)    $  2.97
---------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                               $ 25.79     $  26.83     $  29.58   $ 24.56     $ 24.76
=====================================================================================================================
Total return*                                                   6.10%        4.27%       29.63%     1.14%      15.75%
Ratio of net expenses to average net assets                     1.41%        1.41%        1.47%     1.48%       1.52%
Ratio of net investment income (loss) to average net assets     1.09%        1.06%        1.09%     0.89%       1.87%
Portfolio turnover rate                                           15%          22%          22%       17%          8%
Net assets, end of period (in thousands)                     $98,007     $100,842     $107,116   $80,091     $84,310
=====================================================================================================================


*    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.

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

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

24 Pioneer Real Estate Shares | Annual Report | 12/31/16




---------------------------------------------------------------------------------------------------------------------
                                                             Year        Year         Year       Year        Year
                                                             Ended       Ended        Ended      Ended       Ended
                                                             12/31/16    12/31/15     12/31/14   12/31/13    12/31/12
---------------------------------------------------------------------------------------------------------------------
                                                                                              
Class C
Net asset value, beginning of period                         $ 26.38     $ 29.15      $ 24.24    $ 24.45     $ 21.53
---------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                              $  0.08(a)  $  0.06(a)   $  0.06    $  0.00(b)  $  0.24
   Net realized and unrealized gain (loss) on investments       1.23        0.84         6.76       0.08        2.93
---------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations           $  1.31     $  0.90      $  6.82    $  0.08     $  3.17
---------------------------------------------------------------------------------------------------------------------
Distribution to shareowners:
   Net investment income                                     $ (0.08)    $ (0.07)     $ (0.12)   $ (0.02)    $ (0.25)
   Net realized gain                                           (2.31)      (3.60)       (1.79)     (0.27)         --
---------------------------------------------------------------------------------------------------------------------
Total distributions                                          $ (2.39)    $ (3.67)     $ (1.91)   $ (0.29)    $ (0.25)
---------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                   $ (1.08)    $ (2.77)     $  4.91    $ (0.21)    $  2.92
---------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                               $ 25.30     $ 26.38      $ 29.15    $ 24.24     $ 24.45
=====================================================================================================================
Total return*                                                   5.22%       3.39%       28.50%      0.27%      14.75%
Ratio of net expenses to average net assets                     2.22%       2.24%        2.35%      2.32%       2.37%
Ratio of net investment income (loss) to average net assets     0.29%       0.21%        0.20%      0.02%       1.03%
Portfolio turnover rate                                           15%         22%          22%        17%          8%
Net assets, end of period (in thousands)                     $13,317     $12,540      $13,435    $10,609     $12,667
=====================================================================================================================


*    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.

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

(b)  Amount rounds to less than $0.00 or $(0.00) per share.

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

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 25


Financial Highlights (continued)



---------------------------------------------------------------------------------------------------------------------
                                                             Year        Year         Year       Year        Year
                                                             Ended       Ended        Ended      Ended       Ended
                                                             12/31/16    12/31/15     12/31/14   12/31/13    12/31/12
---------------------------------------------------------------------------------------------------------------------
                                                                                              
Class Y
Net asset value, beginning of period                         $ 26.79     $ 29.54      $ 24.52    $ 24.74     $ 21.78
---------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                              $  0.37(a)  $  0.42(a)   $  0.43    $  0.36     $  0.56
   Net realized and unrealized gain (loss) on investments       1.29        0.84         6.85       0.05        2.97
---------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations           $  1.66     $  1.26      $  7.28    $  0.41     $  3.53
---------------------------------------------------------------------------------------------------------------------
Distribution to shareowners:
   Net investment income                                     $ (0.38)    $ (0.41)     $ (0.41)   $ (0.36)    $ (0.57)
   Net realized gain                                           (2.31)      (3.60)       (1.85)     (0.27)         --
---------------------------------------------------------------------------------------------------------------------
Total distributions                                          $ (2.69)    $ (4.01)     $ (2.26)   $ (0.63)    $ (0.57)
---------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                   $ (1.03)    $ (2.75)     $  5.02    $ (0.22)    $  2.96
---------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                               $ 25.76     $ 26.79      $ 29.54    $ 24.52     $ 24.74
=====================================================================================================================
Total return*                                                   6.47%       4.65%       30.22%      1.61%      16.28%
Ratio of net expenses to average net assets                     1.07%       1.02%        1.03%      1.01%       1.03%
Ratio of net investment income (loss) to average net assets     1.34%       1.43%        1.54%      1.41%       2.48%
Portfolio turnover rate                                           15%         22%          22%        17%          8%
Net assets, end of period (in thousands)                     $33,655     $48,644      $50,520    $35,711     $31,610
=====================================================================================================================


*    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.

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

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

26 Pioneer Real Estate Shares | Annual Report | 12/31/16


Notes to Financial Statements | 12/31/16

1. Organization and Significant Accounting Policies

Pioneer Real Estate Shares (the Fund) is a Delaware statutory trust registered
under the Investment Company Act of 1940 as a diversified, open-end management
investment company. The investment objective of the Fund is to seek long-term
growth of capital. Current income is a secondary objective.

The Fund offers 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.

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 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.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 27


     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.

     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 Pioneer Investment
     Management, Inc. (PIM), the Fund's investment adviser and a wholly owned
     indirect subsidiary of UniCredit S.p.A. (UniCredit), pursuant to procedures
     adopted by the Fund's Board of Trustees. PIM's fair valuation team uses
     fair value methods approved by the Valuation Committee of the Board of
     Trustees. 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 December 31, 2016, 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.

28 Pioneer Real Estate Shares | Annual Report | 12/31/16


     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.   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 December 31, 2016, the Fund did not accrue any interest or
     penalties related 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.

     A portion of the dividend income recorded by the Fund is from distributions
     by publicly traded Real Estate Investment Trusts (REITs), and such
     distributions for tax purposes may also consist of capital gains and return
     of capital. The actual return of capital and capital gains portions of such
     distributions will be determined by formal notifications from the REITs
     subsequent to the calendar year-end. Distributions received from the REITs
     that are determined to be a return of capital are recorded by the Fund as a
     reduction of the cost basis of the securities held and those determined to
     be capital gain are reflected as such on the Statement of Operations.

     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 distributions paid during the years ended December 31,
     2016 and December 31, 2015 were as follows:



     ---------------------------------------------------------------------------
                                                     2016                   2015
     ---------------------------------------------------------------------------
                                                               
     Distributions paid from:
     Ordinary income                          $ 1,910,803            $ 1,878,915
     Long-term capital gain                    12,296,365             19,167,222
     ---------------------------------------------------------------------------
          Total                               $14,207,168            $21,046,137
     ===========================================================================


                        Pioneer Real Estate Shares | Annual Report | 12/31/16 29


     The following shows the components of distributable earnings on a federal
     income tax basis at December 31, 2016:



     ---------------------------------------------------------------------------
                                                                            2016
     ---------------------------------------------------------------------------
                                                                  
     Distributable Earnings:
     Undistributed long-term capital gain                            $ 1,777,493
     Net unrealized appreciation                                      61,002,681
     ---------------------------------------------------------------------------
          Total                                                      $62,780,174
     ===========================================================================


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

D.   Fund Shares

     The Fund records sales and repurchases of its shares as of trade date.
     Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the
     Fund and a wholly owned indirect subsidiary of UniCredit, earned $15,386 in
     underwriting commissions on the sale of Class A shares during the year
     ended December 31, 2016.

E.   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 (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.

F.   Risks

     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.

30 Pioneer Real Estate Shares | Annual Report | 12/31/16


     Interest rates in the U.S. recently have been historically low, so the Fund
     faces a heightened risk that interest rates may rise. A general rise in
     interest rates may cause investors to move out of fixed income securities
     on a large scale, which could adversely affect the price and liquidity of
     fixed income securities and could also result in increased redemptions from
     the Fund.

     Because the Fund may invest a substantial portion of its assets in REITs,
     the Fund may be subject to certain risks associated with direct investments
     in REITs. REITs may be affected by changes in the value of their underlying
     properties and by defaults of their borrowers or tenants. REITs depend
     generally on their ability to generate cash flow to make distributions to
     shareowners, and certain REITs have self-liquidation provisions by which
     mortgages held may be paid in full and distributions of capital returns may
     be made at any time. In addition, the performance of a REIT may be affected
     by its failure to qualify for tax-free pass through of income under the
     Internal Revenue Code or its failure to maintain exemption from
     registration under the Investment Company Act of 1940. 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

PIM manages the Fund's portfolio. Management fees are calculated daily at the
annual rate of 0.80% of the Fund's average daily net assets up to $1 billion and
0.75% on assets over $1 billion. For the year ended December 31, 2016, the
effective management fee (excluding waivers and/or assumption of expenses) was
equal to 0.80% of the Fund's daily net assets. PIM pays a portion of the
management fee it receives from the Fund to AEW Capital Management, L.P. as
compensation for sub-advisory services to the Fund.

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
$9,637 in management fees, administrative costs and certain other reimbursements
payable to PIM at December 31, 2016.

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.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 31


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 year
ended December 31, 2016, such out-of-pocket expenses by class of shares were as
follows:



--------------------------------------------------------------------------------
Shareholder Communications:
--------------------------------------------------------------------------------
                                                                     
Class A                                                                 $ 89,959
Class C                                                                   15,513
Class Y                                                                   21,509
--------------------------------------------------------------------------------
    Total                                                               $126,981
================================================================================


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 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 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 $3,050 in
distribution fees payable to PFD at December 31, 2016.

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 are paid to PFD. For the
year ended December 31, 2016, CDSCs in the amount of $986 were paid to PFD.

32 Pioneer Real Estate Shares | Annual Report | 12/31/16


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 effect until February 9, 2016, was in the amount of $240
million. Effective February 10, 2016, the facility is in the amount of $220
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 year ended December 31, 2016, the Fund had no
borrowings under the credit facility.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 33


Report of Independent Registered Public Accounting Firm

To the Board of Trustees and Shareowners of
Pioneer Real Estate Shares:
--------------------------------------------------------------------------------

We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Pioneer Real Estate Shares (the "Fund"), as of
December 31, 2016, and the related statement of operations for the year then
ended, the statements of changes in net assets for each of the two years in the
period then ended and the financial highlights for each of the three years in
the period then ended. These financial statements and financial highlights are
the responsibility of the Fund's management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits. The financial highlights for the years ended December 31, 2013, and
2012, were audited by other auditors. Those auditors expressed an unqualified
opinion on those financial statements and financial highlights in their report
dated February 25, 2014.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material misstatement. The Fund
is not required to have, nor were we engaged to perform, an audit of its
internal control over financial reporting. Our audits included consideration of
internal control over financial reporting as a basis for designing audit
procedures that are appropriate in the circumstances, but not for the purpose of
expressing an opinion on the effectiveness of the Fund's internal control over
financial reporting. Accordingly, we express no such opinion. An audit also
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, as well as evaluating the
overall financial statement presentation. Our procedures included confirmation
of securities owned as of December 31, 2016, by correspondence with the
custodian. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
Pioneer Real Estate Shares as of December 31, 2016, the results of its
operations for the year then ended, the changes in its net assets for each of
the two years in the period then ended and the financial highlights for each of
the three years in the period then ended, in conformity with accounting
principles generally accepted in the United States of America.

/s/ Deloitte & Touche LLP

Boston, Massachusetts
February 22, 2017

34 Pioneer Real Estate Shares | Annual Report | 12/31/16


Additional Information (Unaudited)

Pioneer Investment Management, Inc. (the "Adviser"), the Fund's investment
adviser, is currently an indirect, wholly owned subsidiary of UniCredit S.p.A.
("UniCredit"). On December 12, 2016, UniCredit announced that it has entered
into a binding agreement for the sale of its Pioneer Investments business, which
includes the Adviser, to Amundi (the "Transaction"). Amundi is headquartered in
Paris, France, and, as of September 30, 2016, had more than $1.1 trillion in
assets under management worldwide. The closing of the Transaction is expected to
happen in 2017, subject to certain regulatory and antitrust approvals, and other
conditions.

Under the Investment Company Act of 1940, the closing of the Transaction will
cause the Fund's current investment advisory agreement with the Adviser to
terminate. Accordingly, the Fund's Board of Trustees will be asked to approve a
new investment advisory agreement for the Fund. If approved by the Board, the
Fund's new investment advisory agreement will be submitted to the shareholders
of the Fund for their approval.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 35


Approval of Investment Advisory and Sub-Advisory Agreements

Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to
Pioneer Real Estate Shares (the Fund) pursuant to an investment advisory
agreement between PIM and the Fund. PIM has retained AEW Capital Management,
L.P. to serve as the sub-adviser to the Fund pursuant to a sub-advisory
agreement between PIM and the sub-adviser. In order for PIM to remain the
investment adviser of the Fund and the sub-adviser to remain the sub-adviser of
the Fund, the Trustees of the Fund must determine annually whether to renew the
investment advisory agreement and the sub-advisory agreement for the Fund.

The contract review process began in January 2016 as the Trustees of the Fund
agreed on, among other things, an overall approach and timeline for the process.
Contract review materials were provided to the Trustees in March 2016 and May
2016. In addition, the Trustees reviewed and discussed the Fund's performance at
regularly scheduled meetings throughout the year, and took into account other
information related to the Fund provided to the Trustees at regularly scheduled
meetings, in connection with the review of the Fund's investment advisory and
sub-advisory agreements.

In March 2016, the Trustees, among other things, discussed the memorandum
provided by Fund counsel that summarized the legal standards and other
considerations that are relevant to the Trustees in their deliberations
regarding the renewal of the investment advisory agreement and the sub-advisory
agreement, and reviewed and discussed the qualifications of the investment
management teams, as well as the level of investment by the Fund's portfolio
managers in the Fund. In May 2016, the Trustees, among other things, reviewed
the Fund's management fee and total expense ratios, the financial statements of
PIM and its parent companies, the profitability analyses provided by PIM, and
possible economies of scale. The Trustees also reviewed the profitability of the
institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset
Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's
fund management business, and considered the differences between the fees and
expenses of the Fund and the fees and expenses of Pioneer's institutional
accounts, as well as the different services provided by PIM to the Fund and by
Pioneer to the institutional accounts. The Trustees further considered contract
review materials in July and September 2016, including the materials provided by
the sub-adviser to the Fund.

At a meeting held on September 13, 2016, based on their evaluation of the
information provided by PIM, the sub-adviser and third parties, the Trustees of
the Fund, including the Independent Trustees voting separately, unanimously
approved the renewal of the investment advisory agreement and

36 Pioneer Real Estate Shares | Annual Report | 12/31/16


the sub-advisory agreement for another year. In approving the renewal of the
investment advisory agreement and the sub-advisory agreement, 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 determining to approve the renewal of the agreements.

Nature, Extent and Quality of Services

The Trustees considered the nature, extent and quality of the services that had
been provided by PIM and the sub-adviser to the Fund, taking into account the
investment objective and strategy of the Fund. The Trustees also reviewed the
sub-adviser's investment approach for the Fund and its research process. The
Trustees considered the resources of PIM and the sub-adviser and the personnel
of PIM and the sub-adviser who provide investment management services to the
Fund. They also reviewed the amount of non-Fund assets managed by the portfolio
managers of the Fund. The Trustees considered the non-investment resources and
personnel of PIM involved in PIM's services to the Fund, including PIM's
compliance and legal resources and personnel. The Trustees noted the substantial
attention and high priority given by PIM's senior management to the Pioneer fund
complex. The Trustees further considered differences in services provided by PIM
and the sub-adviser under the investment advisory agreement and the sub-advisory
agreement, respectively.

The Trustees considered that PIM supervises and monitors the performance of the
Fund's service providers (including the sub-adviser) and provides the Fund with
personnel (including Fund officers) and other resources that are necessary for
the Fund's business management and operations. The Trustees also considered
that, as administrator, PIM is responsible for the administration of the Fund's
business and other affairs. The Trustees considered the fees paid to PIM for the
provision of administration services.

Based on these considerations, the Trustees concluded that the nature, extent
and quality of services that had been provided by each of PIM and the Sub-
Adviser to the Fund were satisfactory and consistent with the terms of the
investment advisory agreement and the sub-advisory agreement, respectively.

Performance of the Fund

In considering the Fund's performance, the Trustees regularly review and discuss
throughout the year data prepared by PIM 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 with the performance of
the Fund's benchmark index. They also discuss the Fund's

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 37


performance with PIM and the sub-adviser on a regular basis. The Trustees'
regular reviews and discussions were factored into the Trustees' deliberations
concerning the renewal of the advisory and sub-advisory agreements.

Management Fee and Expenses

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. The
Trustees also considered that PIM, not the Fund, paid the sub-adviser pursuant
to the sub-advisory agreement. The Trustees evaluated both the fee under the
sub-advisory agreement and the portion of the fee under the investment advisory
agreement retained by PIM. In all quintile rankings referred to below, first
quintile is most favorable to the Fund's shareowners.

The Trustees considered that the Fund's management fee for the most recent
fiscal year was in the third quintile relative to the management fees paid by
other funds in its Morningstar peer group 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 for the most recent fiscal year was
in the fourth quintile relative to its Morningstar peer group and in the third
quintile relative to its Strategic Insight peer group, in each case for the
comparable period. The Trustees considered the impact of transfer agency,
sub-transfer agency, and other non-management fee expenses on the expense ratios
of the Fund, and noted the impact of expenses relating to small accounts and
omnibus accounts on transfer and sub-transfer agency expenses generally. 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 also considered information showing significant expense
reimbursements by the sponsors of the other funds in the peer groups.

The Trustees reviewed management fees charged by Pioneer to institutional and
other clients, including publicly offered European funds sponsored by affiliates
of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory
capacity), and unaffiliated foreign and domestic separate accounts. The Trustees
also considered PIM's costs in providing services to the Fund and Pioneer'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 Pioneer's client

38 Pioneer Real Estate Shares | Annual Report | 12/31/16


accounts, the Trustees took into account the respective demands, resources and
complexity associated with the Fund and 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 the investment advisory
agreement with the Fund, PIM performs 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 entrepreneurial risks
associated with PIM's management of the Fund and Pioneer's management of the
other client accounts.

The Trustees reviewed management fees charged by the sub-adviser to its other
clients. The Trustees noted that the sub-advisory fees paid to the sub-adviser
with respect to the Fund were within the range of the fee rates charged by the
Sub-Adviser to its other clients.

The Trustees concluded that the management fee payable by the Fund to PIM, as
well as the fees payable by PIM to the sub-adviser, were reasonable in relation
to the nature and quality of the services provided by PIM and the sub-adviser to
the Fund.

Profitability

The Trustees considered information provided by PIM regarding the profitability
of PIM with respect to the advisory services provided by PIM to the Fund,
including the methodology used by PIM in allocating certain of its costs to the
management of the Fund. The Trustees also considered PIM's profit margin in
connection with the overall operation of the Fund. They further reviewed the
financial results, including the profit margins, realized by PIM and its
affiliates from non-fund businesses. The Trustees considered PIM's profit
margins with respect to the Fund in 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 PIM's profitability with
respect to the management of the Fund was not unreasonable.

Economies of Scale

The Trustees considered PIM'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 funds and fund shareholders. The Trustees
noted the breakpoint in the management fee schedule. 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 PIM in research

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 39


and analytical capabilities and PIM'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 reductions in expenses. The Trustees concluded that
economies of scale, if any, were being appropriately shared with the Funds.

Other Benefits

The Trustees considered the other benefits to PIM and the sub-adviser from its
relationship with the Fund. The Trustees considered the character and amount of
fees paid by the Fund, other than under the investment advisory agreement, for
services provided by PIM and its affiliates. The Trustees further considered the
revenues and profitability of PIM's businesses other than the fund business.
Pioneer is the principal U.S. asset management business of Pioneer Global Asset
Management, the worldwide asset management business of UniCredit Group, which
manages over $150 billion in assets (including the Funds). Pioneer and the Funds
receive reciprocal intangible benefits from the relationship, including mutual
brand recognition and, for the Funds, direct and indirect access to the
resources of a large global asset manager. The Trustees concluded that any such
benefits received by Pioneer as a result of its relationship with the Funds were
reasonable and their consideration of the advisory agreement between the Fund
and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of
any such intangible benefits.

Conclusion

After consideration of the factors described above as well as other factors, the
Trustees, including all of the Independent Trustees, concluded that each of the
investment advisory agreement between PIM and the Fund and the sub-advisory
agreement between PIM and the sub-adviser, including, in each case, the fees
payable thereunder, was fair and reasonable and voted to approve the proposed
renewal of each of the investment advisory agreement and the sub-advisory
agreement for the Fund.

40 Pioneer Real Estate Shares | Annual Report | 12/31/16


Trustees, Officers and Service Providers

Investment Adviser
Pioneer Investment Management, Inc.

Custodian and Sub-Administrator
Brown Brothers Harriman & Co.

Independent Registered Public Accounting Firm
Deloitte & Touche LLP

Principal Underwriter
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 us.pioneerinvestments.com. This information is also available on the
Securities and Exchange Commission's web site at www.sec.gov.

Trustees and Officers

The Fund's Trustees and officers are listed below, together with their principal
occupations during at least the past five years. Trustees who are interested
persons of the Fund within the meaning of the 1940 Act are referred to as
Interested Trustees. Trustees who are not interested persons of the Fund are
referred to as Independent Trustees. Each of the Trustees serves as a Trustee of
each of the 46 U.S. registered investment portfolios for which Pioneer serves as
investment adviser (the "Pioneer Funds"). The address for all Trustees and all
officers of the Fund is 60 State Street, Boston, Massachusetts 02109.

The Statement of Additional Information of the Fund includes additional
information about the Trustees and is available, without charge, upon request,
by calling 1-800-225-6292.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 41


Independent Trustees



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                  Term of Office and                                                     Other Directorships
Position Held With the Fund    Length of Service      Principal Occupation                            Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                             
Thomas J. Perna (66)           Trustee since 2006.    Private investor (2004 - 2008 and 2013 -        Director, Broadridge Financial
Chairman of the Board          Serves until a         present); Chairman (2008 - 2013) and Chief      Solutions, Inc. (investor
and Trustee                    successor trustee is   Executive Officer (2008 - 2012), Quadriserv,    communications and securities
                               elected or earlier     Inc. (technology products for securities        processing provider for
                               retirement or removal. lending industry); and Senior Executive Vice    financial services industry)
                                                      President, The Bank of New York (financial and  (2009 - present); Director,
                                                      securities services) (1986 - 2004)              Quadriserv, Inc. (2005 -
                                                                                                      2013); and Commissioner, New
                                                                                                      Jersey State Civil Service
                                                                                                      Commission (2011 - 2015)
------------------------------------------------------------------------------------------------------------------------------------
David R. Bock (73)             Trustee since 2005.    Managing Partner, Federal City Capital          Director of New York Mortgage
Trustee                        Serves until a         Advisors (corporate advisory services company)  Trust (publicly-traded
                               successor trustee is   (1997 - 2004 and 2008 - present); Interim       mortgage REIT) (2004 - 2009,
                               elected or earlier     Chief Executive Officer, Oxford Analytica,      2012 - present); Director of
                               retirement or removal. Inc. (privately-held research and consulting    The Swiss Helvetia Fund, Inc.
                                                      company) (2010); Executive Vice President and   (closed-end fund) (2010 -
                                                      Chief Financial Officer, I-trax, Inc.           present); Director of Oxford
                                                      (publicly traded health care services company)  Analytica, Inc. (2008 -
                                                      (2004 - 2007); and Executive Vice President     present); and Director of
                                                      and Chief Financial Officer, Pedestal Inc.      Enterprise Community
                                                      (internet-based mortgage trading company)       Investment, Inc.
                                                      (2000 - 2002); Private consultant (1995-1997),  (privately-held affordable
                                                      Managing Director, Lehman Brothers (investment  housing finance company) (1985
                                                      banking firm) (1992-1995); and Executive, The   - 2010)
                                                      World Bank (1979-1992)
------------------------------------------------------------------------------------------------------------------------------------
Benjamin M. Friedman (72)      Trustee since 2008.    William Joseph Maier Professor of Political     Trustee, Mellon Institutional
Trustee                        Serves until a         Economy, Harvard University (1972 - present)    Funds Investment Trust and
                               successor trustee is                                                   Mellon Institutional Funds
                               elected or earlier                                                     Master Portfolio (oversaw 17
                               retirement or removal.                                                 portfolios in fund complex)
                                                                                                      (1989-2008)
------------------------------------------------------------------------------------------------------------------------------------


42 Pioneer Real Estate Shares | Annual Report | 12/31/16




------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                  Term of Office and                                                     Other Directorships
Position Held With the Fund    Length of Service      Principal Occupation                            Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                             
Margaret B.W. Graham (69)      Trustee since 1995.    Founding Director, Vice President and           None
Trustee                        Serves until a         Corporate Secretary, The Winthrop Group, Inc.
                               successor trustee is   (consulting firm) (1982 - present); Desautels
                               elected or earlier     Faculty of Management, McGill University (1999
                               retirement or removal. - present); and Manager of Research Operations
                                                      and Organizational Learning, Xerox PARC,
                                                      Xerox's advance research center (1990-1994)
------------------------------------------------------------------------------------------------------------------------------------
Marguerite A. Piret (68)       Trustee since 1995.    President and Chief Executive Officer, Newbury  Director of New America High
Trustee                        Serves until a         Piret Company (investment banking firm) (1981   Income Fund, Inc. (closed-end
                               successor trustee is   - present)                                      investment company) (2004 -
                               elected or earlier                                                     present); and Member, Board of
                               retirement or removal.                                                 Governors, Investment Company
                                                                                                      Institute (2000 - 2006)
------------------------------------------------------------------------------------------------------------------------------------
Fred J. Ricciardi (69)         Trustee since 2014.    Consultant (investment company services) (2012  None
Trustee                        Serves until a         - present); Executive Vice President, BNY
                               successor trustee is   Mellon (financial and investment company
                               elected or earlier     services) (1969 - 2012); Director, BNY
                               retirement or removal. International Financing Corp. (financial
                                                      services) (2002 - 2012); and Director, Mellon
                                                      Overseas Investment Corp. (financial services)
                                                      (2009 - 2012)
------------------------------------------------------------------------------------------------------------------------------------


                        Pioneer Real Estate Shares | Annual Report | 12/31/16 43


Interested Trustee



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                  Term of Office and                                                     Other Directorships
Position Held With the Fund    Length of Service      Principal Occupation                            Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                             
Kenneth J. Taubes (58)*        Trustee since 2014.    Director and Executive Vice President (since    None
Trustee                        Serves until a         2008) and Chief Investment Officer, U.S.
                               successor trustee is   (since 2010) of Pioneer Investment
                               elected or earlier     Management-USA (PIM-USA); Executive Vice
                               retirement or removal. President of Pioneer (since 2008); Executive
                                                      Vice President of Pioneer Institutional Asset
                                                      Management, Inc. (since 2009); and Portfolio
                                                      Manager of Pioneer (since 1999)
------------------------------------------------------------------------------------------------------------------------------------


*    Mr. Taubes is an Interested Trustee because he is an officer of the Fund's
     investment adviser and certain of its affiliates.

44 Pioneer Real Estate Shares | Annual Report | 12/31/16


Advisory Trustee



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                  Term of Office and                                                     Other Directorships
Position Held With the Fund    Length of Service      Principal Occupation                            Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                             
Lorraine Monchak (60)**        Advisory Trustee since Chief Investment Officer, 1199 SEIU Funds       Trustee of Pioneer closed-end
Advisory Trustee               2014.                  (healthcare workers union pension funds) (2001  investment companies (5
                                                      - present); Vice President - International      portfolios) (Sept. 2015 -
                                                      Investments Group, American International       present)
                                                      Group, Inc. (insurance company) (1993 - 2001);
                                                      Vice President, Corporate Finance and Treasury
                                                      Group, Citibank, N.A. (1980 - 1986 and 1990 -
                                                      1993); Vice President - Asset/Liability
                                                      Management Group, Federal Farm Funding
                                                      Corporation (government-sponsored issuer of
                                                      debt securities) (1988 - 1990); Mortgage
                                                      Strategies Group, Shearson Lehman Hutton, Inc.
                                                      (investment bank) (1987 - 1988); and Mortgage
                                                      Strategies Group, Drexel Burnham Lambert, Ltd.
                                                      (investment bank) (1986 - 1987)
------------------------------------------------------------------------------------------------------------------------------------


**   Ms. Monchak is a non-voting advisory trustee.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 45


Fund Officers



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                  Term of Office and                                                     Other Directorships
Position Held With the Fund    Length of Service      Principal Occupation                            Held by Officer
------------------------------------------------------------------------------------------------------------------------------------
                                                                                             
Lisa M. Jones (54)             Since 2014. Serves at  Chair, Director, CEO and President of PIM-USA   Trustee of Pioneer closed-end
President and Chief            the discretion of the  (since September 2014); Chair, Director, CEO    investment companies (5
Executive Officer              Board.                 and President of Pioneer Investment             portfolios) (Sept. 2015 -
                                                      Management, Inc. (since September 2014);        present)
                                                      Chair, Director, CEO and President of Pioneer
                                                      Funds Distributor, Inc. (since September
                                                      2014); Chair, Director, CEO and President of
                                                      Pioneer Institutional Asset Management, Inc.
                                                      (since September 2014); and Chair, Director,
                                                      and CEO of Pioneer Investment Management
                                                      Shareholder Services, Inc. (since September
                                                      2014); Managing Director, Morgan Stanley
                                                      Investment Management (2010 - 2013); and
                                                      Director of Institutional Business, CEO of
                                                      International, Eaton Vance Management (2005 -
                                                      2010)
------------------------------------------------------------------------------------------------------------------------------------
Christopher J. Kelley (52)     Since 2003. Serves at  Vice President and Associate General Counsel    None
Secretary and                  the discretion of the  of Pioneer since January 2008; Secretary and
Chief Legal Officer            Board.                 Chief Legal Officer of all of the Pioneer
                                                      Funds since June 2010; Assistant Secretary of
                                                      all of the Pioneer Funds from September 2003
                                                      to May 2010; and Vice President and Senior
                                                      Counsel of Pioneer from July 2002 to December
                                                      2007
------------------------------------------------------------------------------------------------------------------------------------
Carol B. Hannigan (55)         Since 2010. Serves at  Fund Governance Director of Pioneer since       None
Assistant Secretary            the discretion of the  December 2006 and Assistant Secretary of all
                               Board.                 the Pioneer Funds since June 2010; Manager -
                                                      Fund Governance of Pioneer from December 2003
                                                      to November 2006; and Senior Paralegal of
                                                      Pioneer from January 2000 to November 2003
------------------------------------------------------------------------------------------------------------------------------------
Thomas Reyes (54)              Since 2010. Serves at  Senior Counsel of Pioneer since May 2013 and    None
Assistant Secretary            the discretion of the  Assistant Secretary of all the Pioneer Funds
                               Board.                 since June 2010; and Counsel of Pioneer from
                                                      June 2007 to May 2013
------------------------------------------------------------------------------------------------------------------------------------
Mark E. Bradley (57)           Since 2008. Serves at  Vice President - Fund Treasury of Pioneer;      None
Treasurer and Chief Financial  the discretion of the  Treasurer of all of the Pioneer Funds since
and Accounting Officer         Board.                 March 2008; Deputy Treasurer of Pioneer from
                                                      March 2004 to February 2008; and Assistant
                                                      Treasurer of all of the Pioneer Funds from
                                                      March 2004 to February 2008
------------------------------------------------------------------------------------------------------------------------------------


46 Pioneer Real Estate Shares | Annual Report | 12/31/16




------------------------------------------------------------------------------------------------------------------------------------
Name, Age and                  Term of Office and                                                     Other Directorships
Position Held With the Fund    Length of Service      Principal Occupation                            Held by Officer
------------------------------------------------------------------------------------------------------------------------------------
                                                                                             
Luis I. Presutti (51)          Since 2000. Serves at  Director - Fund Treasury of Pioneer; and        None
Assistant Treasurer            the discretion of the  Assistant Treasurer of all of the Pioneer
                               Board.                 Funds
------------------------------------------------------------------------------------------------------------------------------------
Gary Sullivan (58)             Since 2002. Serves at  Fund Accounting Manager - Fund Treasury of      None
Assistant Treasurer            the discretion of the  Pioneer; and Assistant Treasurer of all of the
                               Board.                 Pioneer Funds
------------------------------------------------------------------------------------------------------------------------------------
David F. Johnson (37)          Since 2009. Serves at  Fund Administration Manager - Fund Treasury of  None
Assistant Treasurer            the discretion of the  Pioneer since November 2008; Assistant
                               Board.                 Treasurer of all of the Pioneer Funds since
                                                      January 2009; and Client Service Manager -
                                                      Institutional Investor Services at State
                                                      Street Bank from March 2003 to March 2007
------------------------------------------------------------------------------------------------------------------------------------
Jean M. Bradley (64)           Since 2010. Serves at  Chief Compliance Officer of Pioneer and of all  None
Chief Compliance Officer       the discretion of the  the Pioneer Funds since March 2010; Chief
                               Board.                 Compliance Officer of Pioneer Institutional
                                                      Asset Management, Inc. since January 2012;
                                                      Chief Compliance Officer of Vanderbilt Capital
                                                      Advisors, LLC since July 2012: Director of
                                                      Adviser and Portfolio Compliance at Pioneer
                                                      since October 2005; and Senior Compliance
                                                      Officer for Columbia Management Advisers, Inc.
                                                      from October 2003 to October 2005
------------------------------------------------------------------------------------------------------------------------------------
Kelly O'Donnell (45)           Since 2006. Serves at  Director - Transfer Agency Compliance of        None
Anti-Money Laundering Officer  the discretion of the  Pioneer and Anti-Money Laundering Officer of
                               Board.                 all the Pioneer Funds since 2006
------------------------------------------------------------------------------------------------------------------------------------


                        Pioneer Real Estate Shares | Annual Report | 12/31/16 47


                           This page for your notes.

48 Pioneer Real Estate Shares | Annual Report | 12/31/16


                           This page for your notes.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 49


                           This page for your notes.

50 Pioneer Real Estate Shares | Annual Report | 12/31/16


                           This page for your notes.

                        Pioneer Real Estate Shares | Annual Report | 12/31/16 51


                           This page for your notes.

52 Pioneer Real Estate Shares | Annual Report | 12/31/16


How to Contact 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:
--------------------------------------------------------------------------------
Pioneer Funds
P.O. Box 55014
Boston, Massachusetts 02205-5014

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

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

Visit our web site: us.pioneerinvestments.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] PIONEER
       Investments(R)

Pioneer Investment Management, Inc.
60 State Street
Boston, MA 02109
us.pioneerinvestments.com

Securities offered through Pioneer Funds Distributor, Inc.
60 State Street, Boston, MA 02109
Underwriter of Pioneer Mutual Funds, Member SIPC
(C) 2017 Pioneer Investments 18631-11-0217



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.

The audit fees for the Fund were $24,590
payable to Deloitte & Touche LLP for the year ended
December 31, 2016 and $24552 for the year ended December 31, 2015.


(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.

There were no audit-related services in 2016 or 2015.


(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.

The tax fees for the Fund were $5,628
payable to Deloitte & Touche LLP for the year ended
December 31, 2016 and $5,600 for the year ended December 31, 2015.


(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.

There were no other fees in 2016 or 2015.

(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.

Non-Audit Services
Beginning with non-audit service contracts entered
into on or after May 6, 2003, the effective date of the
new SEC pre-approval rules, the Fund's audit
committee is required to pre-approve services to
affiliates defined by SEC rules to the extent that the
services are determined to have a direct impact on the
operations or financial reporting of the Fund.  For the
years ended December 31 2016 and 2015, there were no
services provided to an affiliate that required the
Fund's audit committee pre-approval.



(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.

The aggregate non-audit fees for the Fund were $5,628
payable to Deloitte & Touche LLP for the year ended
December 31, 2016 and $5,600 for the year ended December 31, 2015.


(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 Real Estate Shares


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

Date March 1, 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 March 1, 2017


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

Date March 1, 2017

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