Pioneer Value Fund

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                         Annual Report | September 30, 2012
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                         Ticker Symbols:

                         Class A      PIOTX
                         Class B      PBOTX
                         Class C      PCOTX
                         Class Y      PVFYX

                         [LOGO] PIONEER
                                Investments(R)


                      visit us: us.pioneerinvestments.com


Table of Contents


                                                                          
Letter to Shareowners                                                         2

Portfolio Management Discussion                                               4

Portfolio Summary                                                             9

Prices and Distributions                                                     10

Performance Update                                                           11

Comparing Ongoing Fund Expenses                                              15

Schedule of Investments                                                      17

Financial Statements                                                         21

Notes to Financial Statements                                                29

Report of Independent Registered Public Accounting Firm                      38

Trustees, Officers and Service Providers                                     39


                                  Pioneer Value Fund | Annual Report | 9/30/12 1


President's Letter

Dear Shareowner,

The U.S. stock market rallied sharply through the third quarter of 2012 amid a
sluggish, but nonetheless growing, U.S. economy. We have been cautiously
optimistic about the U.S. from the start of the year, and the economic data
continue to be encouraging. The housing and auto sectors are benefitting from
record-low interest rates. The climate for consumer and business credit has
improved, and inflation appears to be subdued. While corporate profits slowed in
the third quarter, many U.S. companies continue to have strong balance sheets
and to pay attractive dividends* compared to fixed-income securities.

All of these factors contributed to gains for investors who owned riskier
assets, including equities and higher-yielding corporate bonds. Year to date
through September 30, 2012, the Standard & Poor's 500 Index returned 16.35%. In
fixed income, the Bank of America Merrill Lynch High Yield Master II Index was
up by 12.02% during the same period, while the Barclays Capital Aggregate Bond
Index gained 3.99%. Treasury bonds, by contrast, generated a comparatively
sluggish return of 1.70%, as measured by the Barclays Capital Intermediate
Treasuries Index.

Despite this generally positive picture during the first nine months of 2012,
investors face powerful macroeconomic challenges in the months ahead. These
include the threat of a so-called "fiscal cliff" in the U.S. budget process
after the November elections, the European sovereign-debt crisis, and slowing
growth in both Europe and China. Investors can continue to count on market
volatility tied to these factors, although we remain optimistic that the
underlying economic trends are moving in the right direction.

At Pioneer, we have long advocated the benefits of staying diversified** and
investing for the long term. And while diversification alone does not assure a
profit or protect against loss in a declining market, we believe in actively
seeking out opportunities in undervalued securities and sectors around the
globe. Our advice, as always, is to work closely with a trusted financial
advisor to discuss your goals and work together to develop an investment
strategy that meets your individual needs. There is no single best strategy that
works for every investor.

*   Dividends are not guaranteed.
**  Diversification does not assure a profit or protect against loss in a
    declining market.

2 Pioneer Value Fund | Annual Report | 9/30/12


Pioneer's investment professionals focus on finding good opportunities in both
equity and bond markets using the same disciplined investment approach we have
used since 1928. Our strategy is to identify undervalued individual securities
with the greatest potential for success, carefully weighing risk against reward.
Our teams of investment professionals continually monitor and analyze the
relative valuations of different sectors and securities globally to help build
portfolios that we believe can help you achieve your investment goals.

We invite you to learn more about Pioneer and our time-tested approach to
investing by consulting with your financial advisor or visiting us online at
us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank
you for investing with Pioneer.

Sincerely,

/s/ Daniel K. Kingsbury

Daniel K. Kingsbury
President and CEO
Pioneer Investment Management USA, Inc.

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 Value Fund | Annual Report | 9/30/12 3


Portfolio Management Discussion | 9/30/12

In the following interview, portfolio managers Edward (Ned) T. Shadek, Jr., and
John Peckham discuss the environment for equities during the 12 months ended
September 30, 2012, and how the Pioneer Value Fund performed in that
environment. Mr. Shadek, senior vice president and portfolio manager at Pioneer,
and Mr. Peckham, executive vice president and co-head of equity research, U.S.,
at Pioneer, are responsible for the day-to-day management of the Fund.

Q   How would you describe the market environment for equities during the 12
    months ended September 30, 2012?

A   For the most part, the 12-month period ended September 30, 2012, was a very
    good one for the equity market. There were some mini-panics in the market
    during the period, but the "up" months outweighed the "down" months overall.

    The period began in October 2011 in an environment of very good stock
    valuations, as the market at that time was coming off a bottom caused by the
    summer 2011 political battle in Washington over raising the United States'
    debt ceiling, and the subsequent downgrade of U.S. Treasuries by Standard &
    Poor's. The market capitalized on the good valuations and rallied strongly
    for most of the final three months of 2011, though the first of the
    mini-panics occurred late in 2011, on fears that the European debt crisis
    would spin out of control. The panic was quelled, however, by strong
    European Central Bank (ECB) action to inject liquidity into the European
    banking system through LTROs (long-term refinancing operations), and the
    market closed out December 2011 on a high note.

    The market had good momentum entering 2012 and, as it had done in the
    previous three years, roared out of the gate with a very strong rally in the
    first quarter of the year. The rally lasted through April, and then another
    mini-panic--again spurred by concerns about the European sovereign-debt
    crisis--caused a brief downturn in the markets during the month of May.

    Over the final few months of the 12-month period, however, the markets
    rallied again as investors gained confidence that the easing actions of the
    ECB and other central banks were stabilizing global market conditions and
    decreasing the probability that the European Union would fall off the cliff.

4 Pioneer Value Fund | Annual Report | 9/30/12


Q   How did the Fund perform in that environment during the 12 months ended
    September 30, 2012?

A   Pioneer Value Fund Class A shares returned 27.74% at net asset value during
    the 12 months ended September 30, 2012, while the Fund's benchmark, the
    Russell 1000 Value Index (the Russell Index), returned 30.92%. During the
    same period, the average return of the 456 mutual funds in Lipper's
    Large-Cap Value Funds category was 27.74%.

Q   What were the main reasons for the Fund's underperformance of the benchmark
    Russell Index during the 12 months ended September 30, 2012, and what
    investment decisions most affected the Fund's relative performance?

A   Negative benchmark-relative stock selection results in the utilities,
    industrials, telecom services, information technology and health care
    sectors were the main reasons for the Fund's underperformance of the Russell
    Index during the period. A portfolio overweight to information technology,
    which lagged most of the other sectors in the Russell Index during the
    period, also proved to be a heavy drag on the Fund's benchmark-relative
    returns during the 12-month period.

    In utilities, the Fund's position in Exelon was a detractor from
    benchmark-relative performance during the period. We had expected the U.S.
    power markets to recover quickly and also believed that Exelon would benefit
    from its merger with Constellation Energy. Both scenarios failed to play out
    and the portfolio's position in the company took a big hit in a short period
    of time. We closed the Exelon position in 2012. In industrials, the Fund had
    some big investment bets in cyclical companies (Cummins, Rockwell, Emerson)
    that were exposed to Chinese markets. China's economy has been slowing, and
    so the environment there hurt some of the Fund's investments in the sector.
    We ultimately shifted the portfolio out of those positions. Not owning
    General Electric (GE) during the beginning portion of the Fund's fiscal year
    also hurt benchmark-relative returns. We added GE to the portfolio during
    the fiscal year, and it was the Fund's seventh-largest holding as of
    September 30, 2012; but our purchase came a bit too late to reverse the
    negative impact of not owning GE earlier in the period.

    In telecom services, the Fund owned Verizon, which underperformed, rather
    than AT&T, which had a strong year, and that decision hurt
    benchmark-relative performance. We ended up closing the Fund's Verizon
    position and replacing it with Vodafone. In information technology, the
    Fund's holdings in Intel and Hewlett-Packard (HP) were, respectively, the
    two biggest underperformers in the portfolio relative to the Russell Index
    during the period. Regarding Intel, we underestimated the pace of the
    slowdown in the personal computers market, which plagued the company's

                                  Pioneer Value Fund | Annual Report | 9/30/12 5


    performance during the period. We still view Intel as a dominant franchise,
    however, and have maintained the Fund's position. As for HP, the company's
    attempt at a turnaround turned out to be much more challenging than we
    expected, and deteriorating fundamentals convinced us to eliminate the
    Fund's position.

    Finally, in health care, we were slow to sell the Fund's position in
    Cardinal Health, while we were too early in selling Watson Pharmaceuticals
    from the portfolio. Those two decisions detracted from benchmark-relative
    returns.

Q   What investment decisions aided the Fund's performance during the 12 months
    ended September 30, 2012?

A   The Fund's holdings in the consumer discretionary, consumer staples,
    materials and financials sectors performed well relative to the Russell
    Index during the 12-month period. In addition, though benchmark-relative
    performance in health care lagged during the period, there were some
    individual portfolio holdings in the sector that contributed to the Fund's
    absolute return. In fact, in health care, a position in pharmaceutical giant
    Pfizer was the single-biggest contributor to the Fund's absolute return
    during the period. Pfizer represented the portfolio's largest position as of
    September 30, 2012. A position in Amgen, a large biotechnology firm, also
    helped the Fund's performance during the period.

    In consumer discretionary, the Fund was overweight in media companies
    compared with the benchmark, and portfolio holdings such as Comcast, CBS and
    NewsCorp performed well during the period. Also in consumer discretionary,
    the Fund's position in TJX, which we later sold from the portfolio,
    benefited relative performance. In consumer staples, avoiding Procter &
    Gamble, which underperformed, helped the Fund's benchmark-relative returns
    in the sector, while owning Wal-Mart, a well-timed addition to the portfolio
    during the period, also helped relative performance.

    In financials, credit card firms such as Capital One and Discover have
    continued to fare well, and the Fund's positions in both companies aided
    relative returns during the 12-month period (Discover was the second-best
    benchmark-relative contributor held in the portfolio during the period).
    Wells Fargo, another portfolio holding in financials, benefited from the
    general recovery in bank stocks and made a strong contribution to the Fund's
    absolute return.

    In materials, LyondellBasell was the Fund's best-performing holding relative
    to the benchmark over the past 12 months. LyondellBasell was a good
    restructuring story and an investment play on the very favorable conditions
    for North American natural gas prices that prevailed during the period. We
    sold the Fund's position at a profit.

6   Pioneer Value Fund | Annual Report | 9/30/12


Q   Could you discuss the Fund's positioning and your outlook?

A   The Fund currently has a large-cap, high-quality bias, given what are still
    very reasonable stock valuations, especially in an environment of very low
    interest rates. Five of the Fund's top 10 holdings as of September 30, 2012,
    are big pharmaceutical and energy firms (Pfizer, Merck, Johnson & Johnson,
    Marathon Oil, Chevron), as we believe the stocks to be attractively valued.
    The pharmaceutical firms in the portfolio have advanced beyond their "patent
    cliffs," their stocks are cheap, and they've shown improved fundamentals
    while paying strong dividends*. In addition, their management teams have
    been acting more responsibly, spending less on expensive research and
    development and rationalizing their cost basis. The Fund's energy
    positioning moved to an underweight relative to the benchmark after the
    Russell Index was reshuffled during the period, but Chevron and Marathon Oil
    remain two of the Fund's largest holdings, representing a bet on oil that we
    made earlier this year. We do not foresee a massive collapse in oil prices
    any time soon, and the energy companies in the portfolio, as is the case
    with the pharmaceutical companies, are attractively valued and pay good
    dividends.

    In general, there remains plenty of uncertainty plaguing market sentiment,
    especially that of the pending "fiscal cliff" of U.S. budget cuts and tax
    hikes scheduled to occur in January 2013; and there's always the possibility
    that the euro zone's troubles could once again come to the forefront.
    Uncertainty can lead to short-term market volatility, but in the long run,
    we remain optimistic about the prospects for U.S. equities.

    The last year has seen outstanding equity market performance. We do not
    expect that kind of performance to repeat itself, but overall, stocks of
    what we believe to be quality companies are still reasonably valued. We feel
    that the Fund is positioned to perform well in a more normal market
    environment, as compared with the outperforming market of the past year.

*   Dividends are not guaranteed.

                                  Pioneer Value Fund | Annual Report | 9/30/12 7


Please refer to the Schedule of Investments on pages 17-20 for a full listing of
Fund securities.

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

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 and sectors.

These risks may increase share price volatility.

Past performance is no guarantee of future results, and there is no guarantee
that market forecasts discussed will be realized.

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. These statements should not
be relied upon for any other purposes.

8 Pioneer Value Fund | Annual Report | 9/30/12


Portfolio Summary | 9/30/12

Portfolio Diversification
--------------------------------------------------------------------------------
(As a percentage of total investment portfolio)

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



                                                                        
U.S. Common Stocks                                                         90.4%
Depository Receipts for International Stocks                                5.2%
International Common Stocks                                                 4.4%


Sector Distribution
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(As a percentage of equity holdings)

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



                                                                        
Financials                                                                 23.5%
Health Care                                                                18.8%
Energy                                                                     15.2%
Information Technology                                                     10.3%
Industrials                                                                 8.7%
Consumer Staples                                                            7.3%
Consumer Discretionary                                                      6.8%
Telecommunication Services                                                  4.7%
Materials                                                                   4.7%


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



                                                                     
 1.   Pfizer, Inc.                                                         4.88%
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 2.   Chevron Corp.                                                        4.43
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 3.   Microsoft Corp.                                                      4.33
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 4.   Merck & Co., Inc.                                                    3.75
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 5.   Marathon Oil Corp.                                                   3.47
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 6.   PNC Financial Services Group, Inc.                                   3.42
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 7.   General Electric Co.                                                 3.11
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 8.   Johnson & Johnson, Inc.                                              3.04
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 9.   Vodafone Group Plc (A.D.R.)                                          3.00
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10.   Wells Fargo & Co.                                                    2.99
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*   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 security listed.

                                  Pioneer Value Fund | Annual Report | 9/30/12 9


Prices and Distributions | 9/30/12

Net Asset Value per Share
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       Class                     9/30/12                       9/30/11
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         A                        $12.15                        $9.67
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         B                        $11.07                        $8.80
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         C                        $10.99                        $8.76
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         Y                        $12.27                        $9.76
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Distributions per Share: 10/1/11-9/30/12
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
                         Net Investment       Short-Term         Long-Term
      Class                  Income         Capital Gains      Capital Gains
--------------------------------------------------------------------------------
                                                           
        A                    $0.1815             $ --               $ --
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        B                    $    --             $ --               $ --
--------------------------------------------------------------------------------
        C                    $0.0730             $ --               $ --
--------------------------------------------------------------------------------
        Y                    $0.2245             $ --               $ --
--------------------------------------------------------------------------------


The Russell 1000 Value Index measures the performance of large-cap U.S. value
stocks. Index returns assume reinvestment of dividends and, unlike fund returns,
do not reflect any fees, expenses or sales charges. It is not possible to invest
directly in an index.

The index defined here pertains to the "Value of $10,000 Investment" and "Value
of $5 Million Investment" charts on pages 11-14.

10 Pioneer Value Fund | Annual Report | 9/30/12


Performance Update | 9/30/12                                      Class A Shares

Investment Returns
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The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer Value Fund at public offering price, compared to that
of the Russell 1000 Value Index.



Average Annual Total Returns
(As of September 30, 2012)
--------------------------------------------------------------------------------
                                                  Net Asset     Public Offering
Period                                            Value (NAV)   Price (POP)
--------------------------------------------------------------------------------
                                                          
10 Years                                           5.01%         4.39%
5 Years                                           -4.71         -5.84
1 Year                                            27.74         20.39
--------------------------------------------------------------------------------




Expense Ratio
(Per prospectus dated February 1, 2012)
--------------------------------------------------------------------------------
            Gross
--------------------------------------------------------------------------------
         
            1.02%
--------------------------------------------------------------------------------


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

Value of $10,000 Investment



                          Pioneer             Russell
                          Value Fund          1000 Value Index
                                        
9/30/2002                 $   9,425           $  10,000
9/30/2003                 $  11,589           $  12,437
9/30/2004                 $  13,564           $  14,988
9/30/2005                 $  15,437           $  17,489
9/30/2006                 $  16,655           $  20,046
9/30/2007                 $  19,569           $  22,943
9/30/2008                 $  13,551           $  17,538
9/30/2009                 $  12,265           $  15,676
9/30/2010                 $  12,721           $  17,070
9/30/2011                 $  12,035           $  16,748
9/30/2012                 $  15,374           $  21,926


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.

                                 Pioneer Value Fund | Annual Report | 9/30/12 11


Performance Update | 9/30/12                                      Class B Shares

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

The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer Value Fund, compared to that of the Russell 1000
Value Index.



Average Annual Total Returns
(As of September 30, 2012)
--------------------------------------------------------------------------------
                                        If                      If
Period                                  Held                    Redeemed
--------------------------------------------------------------------------------
                                                          
10 Years                                 3.67%                   3.67%
5 Years                                 -6.08                   -6.08
1 Year                                  25.80                   21.80
--------------------------------------------------------------------------------




Expense Ratio
(Per prospectus dated February 1, 2012)
--------------------------------------------------------------------------------
                                        Gross
--------------------------------------------------------------------------------
                                     
                                        2.62%
--------------------------------------------------------------------------------


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

Value of $10,000 Investment



                          Pioneer             Russell
                          Value Fund          1000 Value Index
                                        
9/30/2002                 $  10,000           $  10,000
9/30/2003                 $  12,111           $  12,437
9/30/2004                 $  14,043           $  14,988
9/30/2005                 $  15,821           $  17,489
9/30/2006                 $  16,886           $  20,046
9/30/2007                 $  19,618           $  22,943
9/30/2008                 $  13,431           $  17,538
9/30/2009                 $  11,968           $  15,676
9/30/2010                 $  12,240           $  17,070
9/30/2011                 $  11,398           $  16,748
9/30/2012                 $  14,338           $  21,926


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.

"If Held" results represent the percent change in net asset value per share.
Returns would have been lower had sales charges been reflected. "If Redeemed"
returns reflect the deduction of applicable contingent deferred sales charge
(CDSC). The maximum CDSC for Class B shares is 4% and declines over five years.
For more complete information, please see the prospectus.

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 taxes that a
shareowner would pay on Fund distributions or the redemption of Fund shares.

12 Pioneer Value Fund | Annual Report | 9/30/12


Performance Update | 9/30/12                                      Class C Shares

Investment Returns
--------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $10,000
investment made in Pioneer Value Fund, compared to that of the Russell 1000
Value Index.



Average Annual Total Returns
(As of September 30, 2012)
--------------------------------------------------------------------------------
                                        If                   If
Period                                  Held                 Redeemed
--------------------------------------------------------------------------------
                                                       
10 Years                                 3.86%                3.86%
5 Years                                 -5.76                -5.76
1 Year                                  26.38                26.38
--------------------------------------------------------------------------------




Expense Ratio
(Per prospectus dated February 1, 2012)
--------------------------------------------------------------------------------
                                        Gross
--------------------------------------------------------------------------------
                                     
                                        2.14%
--------------------------------------------------------------------------------


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

Value of $10,000 Investment



                          Pioneer             Russell
                          Value Fund          1000 Value Index
                                        
9/30/2002                 $  10,000           $  10,000
9/30/2003                 $  12,161           $  12,437
9/30/2004                 $  14,064           $  14,988
9/30/2005                 $  15,837           $  17,489
9/30/2006                 $  16,895           $  20,046
9/30/2007                 $  19,650           $  22,943
9/30/2008                 $  13,463           $  17,538
9/30/2009                 $  12,047           $  15,676
9/30/2010                 $  12,366           $  17,070
9/30/2011                 $  11,558           $  16,748
9/30/2012                 $  14,607           $  21,926


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). The performance of Class C shares does not reflect
the 1% front-end sales charge in effect prior to February 1, 2004. 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.

                                 Pioneer Value Fund | Annual Report | 9/30/12 13


Performance Update | 9/30/12                                      Class Y Shares

Investment Returns
--------------------------------------------------------------------------------
The mountain chart on the right shows the change in value of a $5 million
investment made in Pioneer Value Fund, compared to that of the Russell 1000
Value Index.



Average Annual Total Returns
(As of September 30, 2012)
--------------------------------------------------------------------------------
                                        If                   If
Period                                  Held                 Redeemed
--------------------------------------------------------------------------------
                                                       
10 Years                                 5.38%                5.38%
5 Years                                 -4.30                -4.30
1 Year                                  28.29                28.29
--------------------------------------------------------------------------------




Expense Ratio
(Per prospectus dated February 1, 2012)
--------------------------------------------------------------------------------
                                        Gross
--------------------------------------------------------------------------------
                                     
                                        0.61%
--------------------------------------------------------------------------------


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

Value of $5 Million Investment



                          Pioneer             Russell
                          Value Fund          1000 Value Index
                                        
9/30/2002                 $   5,000,000       $   5,000,000
9/30/2003                 $   6,146,935       $   6,218,354
9/30/2004                 $   7,198,245       $   7,494,078
9/30/2005                 $   8,234,567       $   8,744,696
9/30/2006                 $   8,919,265       $  10,023,197
9/30/2007                 $  10,518,035       $  11,471,467
9/30/2008                 $   7,309,642       $   8,769,052
9/30/2009                 $   6,652,108       $   7,837,840
9/30/2010                 $   6,926,435       $   8,535,224
9/30/2011                 $   6,580,943       $   8,374,155
9/30/2012                 $   8,442,523       $  10,963,142


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.

Performance shown for periods prior to the inception of Class Y shares on August
11, 2004, reflects the NAV performance of the Fund's Class A shares. The
performance does not reflect differences in expenses, including Rule 12b-1 fees
applicable to Class A shares. Since fees for Class A shares are generally higher
than those of Class Y shares, the performance for Class Y shares prior to their
inception would have been higher than the performance shown. Class Y shares are
not subject to sales charges and are available to 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.

14 Pioneer Value Fund | Annual Report | 9/30/12


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 Value Fund

Based on actual returns from April 1, 2012, through September 30, 2012.



--------------------------------------------------------------------------------
Share Class                     A              B           C             Y
--------------------------------------------------------------------------------
                                                          
Beginning Account           $1,000.00      $1,000.00    $1,000.00     $1,000.00
Value on 4/1/12
--------------------------------------------------------------------------------
Ending Account              $1,024.95      $1,016.57    $1,018.70     $1,027.39
Value (after expenses)
on 9/30/12
--------------------------------------------------------------------------------
Expenses Paid               $    5.01      $   13.36    $   10.60     $    3.09
During Period*
--------------------------------------------------------------------------------


*   Expenses are equal to the Fund's annualized expense ratio of 0.99%, 2.65%,
    2.10%, and 0.61% for Class A, Class B, Class C, and Class Y shares,
    respectively, multiplied by the average account value over the period,
    multiplied by 183/366 (to reflect the one-half year period).

                                 Pioneer Value Fund | Annual Report | 9/30/12 15


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 Value Fund

Based on a hypothetical 5% return per year before expenses, reflecting the
period from April 1, 2012, through September 30, 2012.



--------------------------------------------------------------------------------
Share Class                     A              B           C              Y
--------------------------------------------------------------------------------
                                                          
Beginning Account           $1,000.00     $1,000.00    $1,000.00      $1,000.00
Value on 4/1/12
--------------------------------------------------------------------------------
Ending Account              $1,020.05     $1,011.75    $1,014.50      $1,021.95
Value (after expenses)
on 9/30/12
--------------------------------------------------------------------------------
Expenses Paid               $    5.00     $   13.33    $   10.58      $    3.08
During Period*
--------------------------------------------------------------------------------


*   Expenses are equal to the Fund's annualized expense ratio of 0.99%, 2.65%,
    2.10%, and 0.61% for Class A, Class B, Class C, and Class Y shares,
    respectively, multiplied by the average account value over the period,
    multiplied by 183/366 (to reflect the one-half year period).

16 Pioneer Value Fund | Annual Report | 9/30/12


Schedule of Investments | 9/30/12



--------------------------------------------------------------------------------
Shares                                                            Value
--------------------------------------------------------------------------------
                                                            
             COMMON STOCKS -- 99.9%
             ENERGY -- 15.2%
             Oil & Gas Equipment & Services -- 2.1%
   398,900   Schlumberger, Ltd.                                   $   28,852,437
--------------------------------------------------------------------------------
             Integrated Oil & Gas -- 9.6%
   715,700   BP Plc (A.D.R.)                                      $   30,317,052
   518,300   Chevron Corp.                                            60,413,048
   473,900   Occidental Petroleum Corp.                               40,783,834
                                                                  --------------
                                                                  $  131,513,934
--------------------------------------------------------------------------------
             Oil & Gas Exploration & Production -- 3.5%
 1,604,100   Marathon Oil Corp.                                   $   47,433,237
                                                                  --------------
             Total Energy                                         $  207,799,608
--------------------------------------------------------------------------------
             MATERIALS -- 4.4%
             Diversified Chemicals -- 2.0%
   536,400   EI du Pont de Nemours & Co.                          $   26,964,828
--------------------------------------------------------------------------------
             Diversified Metals & Mining -- 2.4%
   845,600   Freeport-McMoRan Copper & Gold, Inc.                 $   33,468,848
                                                                  --------------
             Total Materials                                      $   60,433,676
--------------------------------------------------------------------------------
             CAPITAL GOODS -- 6.8%
             Aerospace & Defense -- 3.7%
   451,800   Honeywell International, Inc.                        $   26,995,050
   304,100   United Technologies Corp.                                23,807,989
                                                                  --------------
                                                                  $   50,803,039
--------------------------------------------------------------------------------
             Industrial Conglomerates -- 3.1%
 1,870,700   General Electric Co.                                 $   42,483,597
                                                                  --------------
             Total Capital Goods                                  $   93,286,636
--------------------------------------------------------------------------------
             TRANSPORTATION -- 1.9%
             Railroads -- 1.9%
 1,230,000   CSX Corp.                                            $   25,522,500
                                                                  --------------
             Total Transportation                                 $   25,522,500
--------------------------------------------------------------------------------
             MEDIA -- 6.8%
             Cable & Satellite -- 2.2%
   829,800   Comcast Corp.                                        $   29,681,946
--------------------------------------------------------------------------------
             Movies & Entertainment -- 4.6%
 1,193,200   News Corp.                                           $   29,269,196
   649,800   The Walt Disney Co.                                      33,971,544
                                                                  --------------
                                                                  $   63,240,740
                                                                  --------------
             Total Media                                          $   92,922,686
--------------------------------------------------------------------------------


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

                                 Pioneer Value Fund | Annual Report | 9/30/12 17


Schedule of Investments | 9/30/12 (continued)



--------------------------------------------------------------------------------
Shares                                                            Value
--------------------------------------------------------------------------------
                                                            
             FOOD & STAPLES RETAILING -- 2.7%
             Hypermarkets & Super Centers -- 2.7%
   507,100   Wal-Mart Stores, Inc.                                $   37,423,980
                                                                  --------------
             Total Food & Staples Retailing                       $   37,423,980
--------------------------------------------------------------------------------
             FOOD, BEVERAGE & TOBACCO -- 4.6%
             Soft Drinks -- 1.0%
   363,300   The Coca-Cola Co.                                    $   13,779,969
--------------------------------------------------------------------------------
             Tobacco -- 3.6%
   753,200   Altria Group, Inc.                                   $   25,149,348
   268,200   Philip Morris International, Inc.                        24,121,908
                                                                  --------------
                                                                  $   49,271,256
                                                                  --------------
             Total Food, Beverage & Tobacco                       $   63,051,225
--------------------------------------------------------------------------------
             HEALTH CARE EQUIPMENT & SERVICES -- 4.9%
             Health Care Equipment -- 2.4%
   535,700   Covidien Plc                                         $   31,831,294
--------------------------------------------------------------------------------
             Managed Health Care -- 2.5%
   618,300   UnitedHealth Group, Inc.                             $   34,260,003
                                                                  --------------
             Total Health Care Equipment & Services               $   66,091,297
--------------------------------------------------------------------------------
             PHARMACEUTICALS, BIOTECHNOLOGY & LIFE
             SCIENCES -- 14.0%
             Biotechnology -- 2.3%
   368,400   Amgen, Inc.                                          $   31,063,488
--------------------------------------------------------------------------------
             Pharmaceuticals -- 11.7%
   601,600   Johnson & Johnson Co.                                $   41,456,256
 1,135,600   Merck & Co., Inc.                                        51,215,560
 2,679,500   Pfizer, Inc.                                             66,585,575
                                                                  --------------
                                                                  $  159,257,391
                                                                  --------------
             Total Pharmaceuticals, Biotechnology & Life Sciences $  190,320,879
--------------------------------------------------------------------------------
             BANKS -- 6.4%
             Diversified Banks -- 3.0%
 1,182,100   Wells Fargo & Co.                                    $   40,817,913
--------------------------------------------------------------------------------
             Regional Banks -- 3.4%
   739,100   PNC Financial Services Group, Inc.                   $   46,637,210
                                                                  --------------
             Total Banks                                          $   87,455,123
--------------------------------------------------------------------------------
             DIVERSIFIED FINANCIALS -- 10.8%
             Other Diversified Financial Services -- 5.0%
 1,238,500   Citigroup, Inc.                                      $   40,523,720
   675,200   JPMorgan Chase & Co.                                     27,332,096
                                                                  --------------
                                                                  $   67,855,816
--------------------------------------------------------------------------------


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

18 Pioneer Value Fund | Annual Report | 9/30/12




--------------------------------------------------------------------------------
Shares                                                                   Value
--------------------------------------------------------------------------------
                                                            
             Consumer Finance -- 4.8%
   667,100   Capital One Financial Corp.                          $   38,031,371
   715,800   Discover Financial Services, Inc.                        28,438,734
                                                                  --------------
                                                                  $   66,470,105
--------------------------------------------------------------------------------
             Investment Banking & Brokerage -- 1.0%
   118,400   The Goldman Sachs Group, Inc.                        $   13,459,712
                                                                  --------------
             Total Diversified Financials                         $  147,785,633
--------------------------------------------------------------------------------
             INSURANCE -- 6.3%
             Property & Casualty Insurance -- 6.3%
   361,900   ACE, Ltd.                                            $   27,359,640
   362,500   The Chubb Corp.                                          27,651,500
   448,000   The Travelers Companies, Inc.                            30,580,480
                                                                  --------------
                                                                  $   85,591,620
                                                                  --------------
             Total Insurance                                      $   85,591,620
--------------------------------------------------------------------------------
             SOFTWARE & SERVICES -- 6.4%
             Systems Software -- 6.4%
 1,983,100   Microsoft Corp.                                      $   59,056,718
   885,700   Oracle Corp.                                             27,890,693
                                                                  --------------
                                                                  $   86,947,411
                                                                  --------------
             Total Software & Services                            $   86,947,411
--------------------------------------------------------------------------------
             TECHNOLOGY HARDWARE & EQUIPMENT -- 2.2%
             Communications Equipment -- 2.2%
 1,600,100   Cisco Systems, Inc.                                  $   30,545,909
                                                                  --------------
             Total Technology Hardware & Equipment                $   30,545,909
--------------------------------------------------------------------------------
             SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 1.7%
             Semiconductors -- 1.7%
 1,020,700   Intel Corp.                                          $   23,149,476
                                                                  --------------
             Total Semiconductors & Semiconductor Equipment       $   23,149,476
--------------------------------------------------------------------------------
             TELECOMMUNICATION SERVICES -- 4.8%
             Integrated Telecommunication Services -- 1.8%
   636,500   AT&T, Inc.                                           $   23,996,050
--------------------------------------------------------------------------------
             Wireless Telecommunication Services -- 3.0%
 1,438,200   Vodafone Group Plc (A.D.R.)                          $   40,981,509
                                                                  --------------
             Total Telecommunication Services                     $   64,977,559
--------------------------------------------------------------------------------
             TOTAL COMMON STOCKS
             (Cost $1,173,924,513)                                $1,363,305,218
--------------------------------------------------------------------------------
             TOTAL INVESTMENT IN SECURITIES -- 99.9%
             (Cost $1,173,924,513) (a)                            $1,363,305,218
--------------------------------------------------------------------------------
             OTHER ASSETS & LIABILITIES -- 0.1%                   $      929,218
================================================================================
             TOTAL NET ASSETS -- 100.0%                           $1,364,234,436
================================================================================


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

                                 Pioneer Value Fund | Annual Report | 9/30/12 19


Schedule of Investments | 9/30/12 (continued)

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

(a)       At September 30, 2012, the net unrealized gain on investments based on
          cost for federal income tax purposes of $1,175,552,804 was as follows:



                                                                          
            Aggregate gross unrealized gain for all investments in which
              there is an excess of value over tax cost                      $ 199,090,658

            Aggregate gross unrealized loss for all investments in which
              there is an excess of tax cost over value                        (11,338,244)
                                                                             -------------
            Net unrealized gain                                              $ 187,752,414
                                                                             =============


Purchases and sales of securities (excluding temporary cash investments) for the
year ended September 30, 2012 aggregated $1,022,929,017 and $1,119,601,544,
respectively.

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.)
    Level 3 - significant unobservable inputs (including the Fund's own
              assumptions in determining fair value of investments)

Generally, equity securities are categorized as Level 1, fixed income securities
and senior loans as Level 2 and securities valued using fair value methods
(other than prices supplied by independent pricing services) are categorized
as Level 3. See Notes to Financial Statements -- Note 1A.

The following is a summary of the inputs used as of September 30, 2012, in
valuing the Fund's assets:



--------------------------------------------------------------------------------
                        Level 1           Level 2     Level 3     Total
--------------------------------------------------------------------------------
                                                      
Common Stocks           $1,363,305,218    $ --        $ --        $1,363,305,218
--------------------------------------------------------------------------------
   Total                $1,363,305,218    $ --        $ --        $1,363,305,218
================================================================================


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

20 Pioneer Value Fund | Annual Report | 9/30/12


Statement of Assets and Liabilities | 9/30/12



                                                              
ASSETS:
   Investment in securities (cost $1,173,924,513)                $ 1,363,305,218
   Receivables --
     Investment securities sold                                       10,791,819
     Fund shares sold                                                     26,811
     Dividends                                                         2,235,785
   Other                                                                  16,754
---------------------------------------------------------------------------------
       Total assets                                              $ 1,376,376,387
=================================================================================
LIABILITIES:
   Payables --
     Investment securities purchased                             $     9,363,990
     Fund shares repurchased                                             512,577
     Due to Custodian                                                  1,680,002
     Dividends                                                             3,688
   Due to affiliates                                                     483,771
   Accrued expenses                                                       97,923
---------------------------------------------------------------------------------
       Total liabilities                                         $    12,141,951
=================================================================================
NET ASSETS:
   Paid-in capital                                               $ 1,823,609,249
   Undistributed net investment income                                 8,436,816
   Accumulated net realized loss on investments and
     foreign currency transactions                                  (657,192,116)
   Net unrealized gain on investments                                189,380,705
   Net unrealized loss on other assets and liabilities
      denominated in foreign currencies                                     (218)
---------------------------------------------------------------------------------
       Total net assets                                          $ 1,364,234,436
=================================================================================
NET ASSET VALUE PER SHARE:
(No par value, unlimited number of shares authorized)
   Class A (based on $1,348,833,962/110,992,705 shares)          $         12.15
   Class B (based on $2,739,373/247,547 shares)                  $         11.07
   Class C (based on $4,244,262/386,125 shares)                  $         10.99
   Class Y (based on $8,416,839/686,047 shares)                  $         12.27
MAXIMUM OFFERING PRICE:
   Class A ($12.15 (divided by) 94.25%)                          $         12.89
=================================================================================


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

                                 Pioneer Value Fund | Annual Report | 9/30/12 21


Statement of Operations

For the Year Ended 9/30/12



                                                                             
INVESTMENT INCOME:
   Dividends (net of foreign taxes withheld of $403,379)           $ 35,119,293
   Interest                                                               1,314
   Income from securities loaned, net                                    14,823
------------------------------------------------------------------------------------------------
   Total investment income                                                         $ 35,135,430
================================================================================================
EXPENSES:
   Management fees
     Basic Fee                                                     $  8,061,148
     Performance Adjustment                                          (1,535,309)
   Transfer agent fees and expenses
     Class A                                                          1,533,316
     Class B                                                             28,267
     Class C                                                             14,072
     Class Y                                                              2,171
   Distribution fees
     Class A                                                          3,318,559
     Class B                                                             30,397
     Class C                                                             39,325
   Shareholder communications expense                                 1,058,050
   Administrative reimbursement                                         384,391
   Custodian fees                                                        40,253
   Registration fees                                                     82,266
   Professional fees                                                    132,989
   Printing expense                                                      39,378
   Fees and expenses of nonaffiliated trustees                           52,439
   Miscellaneous                                                         57,550
------------------------------------------------------------------------------------------------
     Total expenses                                                                $ 13,339,262
------------------------------------------------------------------------------------------------
     Net expenses                                                                  $ 13,339,262
------------------------------------------------------------------------------------------------
       Net investment income                                                       $ 21,796,168
------------------------------------------------------------------------------------------------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS
AND FOREIGN CURRENCY TRANSACTIONS:
   Net realized gain (loss) on:
     Investments                                                   $ 44,092,493
     Forward foreign currency contracts and other assets and
       liabilities denominated in foreign currencies                    (48,369)
     Class action                                                     1,941,639    $ 45,985,763
------------------------------------------------------------------------------------------------
   Change in net unrealized gain (loss) on:
     Investments                                                   $257,744,187
     Forward foreign currency contracts and other assets and
       liabilities denominated in foreign currencies                       (397)   $257,743,790
------------------------------------------------------------------------------------------------
   Net gain on investments and foreign currency transactions                       $303,729,553
------------------------------------------------------------------------------------------------
   Net increase in net assets resulting from operations                            $325,525,721
================================================================================================


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

22 Pioneer Value Fund | Annual Report | 9/30/12


Statements of Changes in Net Assets



---------------------------------------------------------------------------------------------------
                                                                  Year Ended        Year Ended
                                                                  9/30/12           9/30/11
---------------------------------------------------------------------------------------------------
                                                                              
FROM OPERATIONS:
Net investment income                                             $   21,796,168    $   18,720,893
Net realized gain on investments, Class action and foreign
   currency transactions                                              45,985,763        19,737,750
Change in net unrealized gain (loss) on investments and foreign
   currency transactions                                             257,743,790       (91,270,199)
---------------------------------------------------------------------------------------------------
     Net increase (decrease) in net assets resulting from
       operations                                                 $  325,525,721    $  (52,811,556)
---------------------------------------------------------------------------------------------------
DISTRIBUTIONS TO SHAREOWNERS:
Net investment income:
     Class A ($0.18 and $0.17 per share, respectively)            $  (21,349,076)   $  (22,104,873)
     Class C ($0.07 and $0.06 per share, respectively)                   (28,134)          (27,722)
     Class Y ($0.22 and $0.21 per share, respectively)                  (181,149)         (273,977)
---------------------------------------------------------------------------------------------------
       Total distributions to shareowners                         $  (21,558,359)   $  (22,406,572)
---------------------------------------------------------------------------------------------------
FROM FUND SHARE TRANSACTIONS:
Net proceeds from sale or exchange of shares                      $   14,434,249    $   19,338,683
Reinvestment of distributions                                         20,222,710        20,888,119
Cost of shares repurchased                                          (201,492,304)     (220,590,282)
---------------------------------------------------------------------------------------------------
       Net decrease in net assets resulting from Fund share
         transactions                                             $ (166,835,345)   $ (180,363,480)
---------------------------------------------------------------------------------------------------
       Net increase (decrease) in net assets                      $  137,132,017    $ (255,581,608)
NET ASSETS:
Beginning of year                                                  1,227,102,419     1,482,684,027
---------------------------------------------------------------------------------------------------
End of year                                                       $1,364,234,436    $1,227,102,419
---------------------------------------------------------------------------------------------------
Undistributed net investment income                               $    8,436,815    $    8,247,376
===================================================================================================


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

                                 Pioneer Value Fund | Annual Report | 9/30/12 23


Statements of Changes in Net Assets (continued)



------------------------------------------------------------------------------------------------
                                  '12 Shares      '12 Amount      '11 Shares       '11 Amount
------------------------------------------------------------------------------------------------
                                                                     
CLASS A
Shares sold                        1,172,718    $   12,657,719      1,500,628    $   17,521,898
Reinvestment of distributions      1,840,145        20,123,847      1,826,737        20,785,131
Less shares repurchased          (17,384,526)     (195,886,533)   (18,514,405)     (209,182,823)
------------------------------------------------------------------------------------------------
   Net decrease                  (14,371,663)   $ (163,104,967)   (15,187,040)   $ (170,875,794)
================================================================================================
CLASS B
Shares sold or exchanged               4,222    $       43,561         45,778    $      462,747
Less shares repurchased             (114,782)       (1,176,018)      (245,177)       (2,530,504)
------------------------------------------------------------------------------------------------
     Net decrease                   (110,560)   $   (1,132,457)      (199,399)   $   (2,067,757)
================================================================================================
CLASS C
Shares sold                           58,056    $      604,405         58,953    $      604,152
Reinvestment of distributions          2,632            26,124          2,458            25,487
Less shares repurchased              (81,122)         (822,680)      (112,399)       (1,151,468)
------------------------------------------------------------------------------------------------
     Net decrease                    (20,434)   $     (192,151)       (50,988)   $     (521,829)
================================================================================================
CLASS Y
Shares sold                           97,611    $    1,128,564         66,098    $      749,886
Reinvestment of distributions          6,591            72,739          6,759            77,501
Less shares repurchased             (314,637)       (3,607,073)      (669,823)       (7,725,487)
------------------------------------------------------------------------------------------------
     Net decrease                   (210,435)   $   (2,405,770)      (596,966)   $   (6,898,100)
================================================================================================


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

24 Pioneer Value Fund | Annual Report | 9/30/12


Financial Highlights



-----------------------------------------------------------------------------------------------------------------------------------
                                                              Year            Year          Year         Year          Year
                                                              Ended           Ended         Ended        Ended         Ended
                                                              9/30/12         9/30/11       9/30/10      9/30/09       9/30/08
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                        
Class A
Net asset value, beginning of period                          $     9.67      $    10.37    $    10.12   $    11.44    $    18.28
-----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income                                      $     0.19      $     0.15    $     0.14   $     0.17    $     0.25
   Net realized and unrealized gain (loss) on investments
     and foreign currency transactions                              2.47           (0.68)         0.24        (1.29)        (5.47)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations            $     2.66      $    (0.53)   $     0.38   $    (1.12)   $    (5.22)
-----------------------------------------------------------------------------------------------------------------------------------
Distributions to shareowners:
   Net investment income                                           (0.18)          (0.17)        (0.13)       (0.20)        (0.25)
   Net realized gain                                                  --              --            --           --         (1.37)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                    $     2.48      $    (0.70)   $     0.25   $    (1.32)   $    (6.84)
-----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $    12.15      $     9.67    $    10.37   $    10.12    $    11.44
===================================================================================================================================
Total return*                                                      27.74%(a)       (5.39)%        3.72%       (9.49)%      (30.75)%
Ratio of net expenses to average net assets +                       0.99%           1.02%         1.01%        1.06%         0.94%
Ratio of net investment income to average net assets +              1.63%           1.23%         1.23%        1.89%         1.73%
Portfolio turnover rate                                               83%             84%          111%          53%           95%
Net assets, end of period (in thousands)                      $1,348,834      $1,211,647    $1,457,472   $1,649,438    $2,082,427
Ratios with reduction for fees paid indirectly:
   Net expenses                                                     0.99%           1.02%         1.01%        1.06%         0.94%
   Net investment income                                            1.63%           1.23%         1.23%        1.89%         1.73%
===================================================================================================================================


*   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.

+   Ratios assuming no reduction for fees paid indirectly.

(a) If the Fund had not recognized gains in settlement of class action lawsuits
    during the year ended September 30, 2012, the total return would have been
    27.58%.

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

                                 Pioneer Value Fund | Annual Report | 9/30/12 25


Financial Highlights (continued)



-----------------------------------------------------------------------------------------------------------------------------------
                                                              Year            Year          Year         Year          Year
                                                              Ended           Ended         Ended        Ended         Ended
                                                              9/30/12         9/30/11       9/30/10      9/30/09       9/30/08
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                        
Class B
Net asset value, beginning of period                          $     8.80      $     9.45    $     9.24   $    10.47    $    16.87
-----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income (loss)                               $     0.02      $    --       $     0.01   $     0.06    $     0.11
   Net realized and unrealized gain (loss) on investments
     and foreign currency transactions                              2.25           (0.65)         0.20        (1.21)        (5.04)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations            $     2.27      $    (0.65)   $     0.21   $    (1.15)   $    (4.93)
-----------------------------------------------------------------------------------------------------------------------------------
Distributions to shareowners:
   Net investment income                                              --              --            --        (0.08)        (0.10)
   Net realized gain                                                  --              --            --           --         (1.37)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                    $     2.27      $    (0.65)   $     0.21   $    (1.23)   $    (6.40)
-----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $    11.07      $     8.80    $     9.45   $     9.24    $    10.47
===================================================================================================================================
Total return*                                                      25.80%(a)       (6.88)%        2.27%      (10.89)%      (31.54)%
Ratio of net expenses to average net assets +                       2.65%           2.62%         2.46%        2.57%         2.06%
Ratio of net investment income (loss) to average net assets +      (0.03)%         (0.37)%       (0.23)%       0.41%         0.60%
Portfolio turnover rate                                               83%             84%          111%          53%           95%
Net assets, end of period (in thousands)                      $    2,739      $    3,151    $    5,271   $    8,057    $   13,518
Ratios with reduction for fees paid indirectly:
   Net expenses                                                     2.65%           2.62%         2.46%        2.57%         2.04%
   Net investment income (loss)                                    (0.03)%         (0.37)%       (0.23)%       0.41%         0.62%
===================================================================================================================================


*   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.

+   Ratios assuming no reduction for fees paid indirectly.

(a) If the Fund had not recognized gains in settlement of class action lawsuits
    during the year ended September 30, 2012, the total return would have been
    25.57%.

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

26 Pioneer Value Fund | Annual Report | 9/30/12




-----------------------------------------------------------------------------------------------------------------------------------
                                                              Year            Year          Year         Year          Year
                                                              Ended           Ended         Ended        Ended         Ended
                                                              9/30/12         9/30/11       9/30/10      9/30/09       9/30/08
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                        
Class C
Net asset value, beginning of period                          $     8.76      $     9.43    $     9.21   $    10.43    $    16.84
-----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income                                      $     0.05      $     0.02    $     0.01   $     0.08    $     0.10
   Net realized and unrealized gain (loss) on investments
     and foreign currency transactions                              2.25           (0.63)         0.23        (1.19)        (5.01)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations            $     2.30      $    (0.61)   $     0.24   $    (1.11)   $    (4.91)
-----------------------------------------------------------------------------------------------------------------------------------
Distributions to shareowners:
   Net investment income                                           (0.07)          (0.06)        (0.02)       (0.11)        (0.13)
   Net realized gain                                                  --              --            --           --         (1.37)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                    $     2.23      $    (0.67)   $     0.22   $    (1.22)   $    (6.41)
-----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $    10.99      $     8.76    $     9.43   $     9.21    $    10.43
===================================================================================================================================
Total return*                                                      26.38%(a)       (6.53)%        2.65%      (10.51)%      (31.49)%
Ratio of net expenses to average net assets +                       2.10%           2.14%         2.16%        2.18%         1.92%
Ratio of net investment income to average net assets +              0.51%           0.11%         0.08%        0.83%         0.76%
Portfolio turnover rate                                               83%             84%          111%          53%           95%
Net assets, end of period (in thousands)                      $    4,244      $    3,560    $    4,314   $    4,371    $    7,458
Ratios with reduction for fees paid indirectly:
   Net expenses                                                     2.10%           2.14%         2.16%        2.18%         1.91%
   Net investment income                                            0.51%           0.11%         0.08%        0.83%         0.77%
===================================================================================================================================


*   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.

+   Ratios assuming no reduction for fees paid indirectly.

(a) If the Fund had not recognized gains in settlement of class action lawsuits
    during the year ended September 30, 2012, the total return would have been
    26.22%.

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

                                 Pioneer Value Fund | Annual Report | 9/30/12 27


Financial Highlights (continued)



-----------------------------------------------------------------------------------------------------------------------------------
                                                              Year            Year          Year         Year          Year
                                                              Ended           Ended         Ended        Ended         Ended
                                                              9/30/12         9/30/11       9/30/10      9/30/09       9/30/08
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                        
Class Y
Net asset value, beginning of period                          $     9.76      $    10.46    $    10.21   $    11.54    $    18.42
-----------------------------------------------------------------------------------------------------------------------------------
Increase (decrease) from investment operations:
   Net investment income                                      $     0.24      $     0.22    $     0.28   $     0.30    $     0.33
   Net realized and unrealized gain (loss) on investments
     and foreign currency transactions                              2.49           (0.71)         0.14        (1.38)        (5.54)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) from investment operations            $     2.73      $    (0.49)   $     0.42   $    (1.08)   $    (5.21)
-----------------------------------------------------------------------------------------------------------------------------------
Distributions to shareowners:
   Net investment income                                           (0.22)          (0.21)        (0.17)       (0.25)        (0.30)
   Net realized gain                                                  --              --            --          --          (1.37)
-----------------------------------------------------------------------------------------------------------------------------------
Net increase (decrease) in net asset value                    $     2.51      $    (0.70)   $     0.25   $    (1.33)   $    (6.88)
-----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                                $    12.27      $     9.76    $    10.46   $    10.21    $    11.54
===================================================================================================================================
Total return*                                                      28.29%(a)        (4.99)%       4.12%       (9.00)%      (30.50)%
Ratio of net expenses to average net assets +                       0.61%            0.61%        0.59%        0.54%         0.53%
Ratio of net investment income to average net assets +              2.01%            1.63%        1.63%        2.51%         2.12%
Portfolio turnover rate                                               83%              84%         111%          53%           95%
Net assets, end of period (in thousands)                      $    8,417      $     8,745   $   15,628   $   39,120    $  112,571
Ratios with reduction for fees paid indirectly:
   Net expenses                                                     0.61%            0.61%        0.59%        0.54%         0.53%
   Net investment income                                            2.01%            1.63%        1.63%        2.51%         2.12%
===================================================================================================================================


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

+   Ratios assuming no reduction for fees paid indirectly.

(a) If the Fund had not recognized gains in settlement of class action lawsuits
    during the year ended September 30, 2012, the total return would have been
    28.09%.

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

28 Pioneer Value Fund | Annual Report | 9/30/12


Notes to Financial Statements | 9/30/12

1. Organization and Significant Accounting Policies

Pioneer Value Fund (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 reasonable income and capital
growth.

The Fund offers four classes of shares designated as Class A, Class B, Class C,
and Class Y shares. Effective as of the close of business on December 31, 2009,
Class B shares are no longer offered to new or existing shareholders, except
that dividends and/or capital gain distributions may continue to be reinvested
in Class B shares, and shareholders may exchange their Class B shares for Class
B shares of other Pioneer funds, as permitted by existing exchange privileges.
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 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. Class B shares convert to Class A shares approximately eight years after
the date of purchase.

The Fund's financial statements have been prepared in conformity with U.S.
generally accepted accounting principles that require the management of the Fund
to, among other things, 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 gains and losses on investments during the reporting
period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the
Fund in the preparation of its financial statements, which are consistent with
those policies generally accepted in the investment company industry:

                                 Pioneer Value Fund | Annual Report | 9/30/12 29


A. Security Valuation

   Security transactions are recorded as of trade date. 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. In computing
   the net asset value, securities that have traded on an exchange are valued at
   the last sale price on the principal exchange where they are traded.
   Securities that have not traded on the date of valuation, or securities for
   which sale prices are not available, generally are valued at the mean between
   the last bid and asked prices. Short-term fixed income securities with
   remaining maturities of sixty days or less generally are valued at amortized
   cost. Money market mutual funds are valued at net asset value.

   Trading in foreign securities is substantially completed each day at various
   times prior to the close of the NYSE. The values of such securities used in
   computing the net asset value of the Fund's shares are determined as of such
   times.

   Securities for which market prices and/or quotations are not readily
   available or are considered to be unreliable are valued using fair value
   methods pursuant to procedures adopted by the Board of Trustees. 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 from exchange prices.

   At September 30, 2012, there were no securities that were valued using fair
   value methods (other than securities that were valued using prices supplied
   by independent pricing services). 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.

   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 is recorded on the accrual
   basis. Dividend and interest income are reported net of unrecoverable foreign
   taxes withheld at the applicable country rates.

   Gains and losses on sales of investments are calculated on the identified
   cost method for both financial reporting and federal income tax purposes.

30 Pioneer Value Fund | Annual Report | 9/30/12


B. Foreign Currency Translation

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

   Net realized gains and losses on foreign currency transactions, if any,
   represent, among other things, the net realized gains and losses on foreign
   currency contracts, disposition of foreign currencies and the difference
   between the amount of income accrued and the U.S. dollars actually received.
   Further, the effects of changes in foreign currency exchange rates on
   investments are not segregated in the Statement of Operations from the
   effects of changes in market price of those securities but are included with
   the net realized and unrealized gain or loss on investments.

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 taxable income and net realized capital gains, if any, to its
   shareowners. Therefore, no federal income tax provision is required. As of
   September 30, 2012, the Fund did not have any interest and penalties related
   to unrecognized tax positions, which, if applicable, would be recorded as an
   income tax expense in the Statement of Operations. Tax years for the prior
   three fiscal years are subject to examination by federal and state tax
   authorities.

   The amounts and characterizations of distributions to shareowners for
   financial reporting purposes are determined in accordance with federal income
   tax rules. Therefore, the sources of the Fund's distributions may be shown in
   the accompanying financial statements as from or in excess of net investment
   income or as from net realized gain on investment transactions, or as from
   paid-in capital, depending on the type of book/tax differences that may
   exist.

   At September 30, 2012, the Fund reclassified $48,369 to decrease net
   investment income and $48,369 to decrease accumulated net realized loss on
   investments and foreign currency transactions to reflect permanent book/tax
   differences. The reclassification has no impact on the net asset value of the
   Fund and is designed to present the Fund's capital accounts on a tax basis.

   At September 30, 2012, the Fund had a net capital loss carryforward of
   $655,563,825, of which the following amounts will expire between 2017 and
   2018 if not utilized: $336,018,363 in 2017 and $319,545,462 in 2018.

                                 Pioneer Value Fund | Annual Report | 9/30/12 31


The tax character of distributions paid during the years ended September 30,
2012 and September 30, 2011 were as follows:



--------------------------------------------------------------------------------
                                                          2012              2011
--------------------------------------------------------------------------------
                                                             
Distributions paid from:
Ordinary income                                    $21,558,359       $22,406,572
--------------------------------------------------------------------------------
   Total                                           $21,558,359       $22,406,572
================================================================================


The following shows the components of distributable earnings on a federal income
tax basis at September 30, 2012:



--------------------------------------------------------------------------------
                                                                           2012
--------------------------------------------------------------------------------
                                                               
Distributable earnings:
Undistributed ordinary income                                     $   8,436,816
Capital loss carryforward                                          (655,563,825)
Unrealized depreciation                                             187,752,196
--------------------------------------------------------------------------------
   Total                                                          $(459,374,813)
================================================================================


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

D. Forward Foreign Currency Contracts

   The Fund may enter into forward foreign currency contracts (contracts) for
   the purchase or sale of a specific foreign currency at a fixed price on a
   future date. All contracts are marked to market daily at the applicable
   exchange rates, and any resulting unrealized gains or losses are recorded in
   the Fund's financial statements. The Fund records realized gains and losses
   at the time a portfolio hedge is offset by entry into a closing transaction
   or extinguished by delivery of the currency. Risks may arise upon entering
   into these contracts from the potential inability of counterparties to meet
   the terms of the contract and from unanticipated movements in the value of
   foreign currencies relative to the U.S. dollar (see Note 7).

E. 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 S.p.A. (UniCredit),
   earned $55,954 in underwriting commissions on the sale of Class A shares
   during the year ended September 30, 2012.

32 Pioneer Value Fund | Annual Report | 9/30/12


F. Class Allocations

   Income, common expenses and realized and unrealized gains and losses are
   calculated at the Fund level and allocated daily to each class of shares
   based on its respective percentage of adjusted net assets at the beginning of
   the day. During the year, the Fund recognized gains of $1,941,639 in
   settlement of class action lawsuits from several different companies, as
   reflected on the Statement of Operations.

   Distribution fees are calculated based on the average daily net asset value
   attributable to Class A, Class B, and Class C shares of the Fund,
   respectively (see Note 4). Class Y shares do not pay distribution fees. All
   expenses and fees paid to the transfer agent, Pioneer Investment Management
   Shareholder Services, Inc. (PIMSS), 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 B, Class C and Class Y shares
   can reflect different transfer agent and distribution expense rates.

G. Risks

   At times, the Fund's investments may represent industries or industry sectors
   that are interrelated or have common risks, making the Fund more susceptible
   to any economic, political, or regulatory developments or other risks
   affecting those industries and sectors. The Fund's prospectus contains
   unaudited information regarding the Fund's principal risks. Please refer to
   that document when considering the Fund's principal risks.

H. Repurchase Agreements

   With respect to repurchase agreements entered into by the Fund, the value of
   the underlying securities (collateral), including accrued interest, is
   required to be equal to or in excess of the repurchase price. The collateral
   for all repurchase agreements is held in safekeeping in the customer-only
   account of the Fund's custodian or a subcustodian of the Fund. The Fund's
   investment adviser, Pioneer Investment Management, Inc. (PIM), is responsible
   for determining that the value of the collateral remains at least equal to
   the repurchase price.

                                 Pioneer Value Fund | Annual Report | 9/30/12 33


I. Securities Lending

   The Fund may lend securities in its portfolio to certain broker-dealers or
   other institutional investors. When entering into a securities loan
   transaction, the Fund typically receives cash collateral from the borrower
   equal to at least the value of the securities loaned, which is invested in
   temporary investments. Credit Suisse AG, New York Branch, as the Fund's
   securities lending agent, manages the Fund's securities lending collateral.
   The income earned on the investment of collateral is shared with the borrower
   and the lending agent in payment of any rebate due to the borrower with
   respect to the securities loan, and in compensation for the lending agent's
   services to the Fund. The Fund also continues to receive payments in lieu of
   dividends or interest on the securities loaned. Gain or loss on the value of
   the loaned securities that may occur during the term of the loan will be for
   the account of the Fund. The amount of the collateral is required to be
   adjusted daily to reflect any price fluctuation in the value of the loaned
   securities. If the required market value of the collateral is less than the
   value of the loaned securities, the borrower is required to deliver
   additional collateral for the account of the Fund prior to the close of
   business on that day. The Fund has the right, under the lending agreement, to
   terminate the loan and recover the securities from the borrower with prior
   notice. The Fund is required to return the cash collateral to the borrower
   and could suffer a loss if the value of the collateral, as invested, has
   declined. At September 30, 2012, the Fund had no securities on loan.

2. Management Agreement

PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's
portfolio. PIM receives a basic fee that is calculated at the annual rate of
0.60% of the Fund's average daily net assets up to $5 billion, 0.575% on the
next $5 billion and 0.55% on the excess over $10 billion. The basic fee can
increase or decrease by a maximum of 0.10% based on the investment performance
of the Fund's Class A shares as compared to the Russell 1000 Value Index. The
performance comparison is made for a rolling 36-month period. In addition,
Pioneer contractually limits any positive adjustment of the Fund's management
fee to 0.10% of the Fund's average daily net assets on an annual basis (i.e., to
a maximum of 0.70% after the performance adjustment). For the year ended
September 30, 2012, the aggregate performance adjustment resulted in a decrease
to the basic fee of $1,535,309. For the year ended September 30, 2012, the
effective management fee (excluding waivers and/or assumption of expenses) was
equivalent to 0.49% of the Fund's average daily net assets.

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.

34 Pioneer Value Fund | Annual Report | 9/30/12


Included in "Due to affiliates" reflected on the Statement of Assets and
Liabilities is $117,916 in management fees, administrative costs and certain
other reimbursements payable to PIM at September 30, 2012.

Effective March 5, 2012, PIM has retained Brown Brothers Harriman & Co. to
provide certain sub-administration and accounting services to the Fund.

3. Transfer Agent

PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially
all transfer agent and shareowner services to the Fund at negotiated rates. In
addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS
related to shareholder communications activities such as proxy and statement
mailings, outgoing phone calls and omnibus relationship contracts. For the year
ended September 30, 2012, such out-of-pocket expenses by class of shares were as
follows:



--------------------------------------------------------------------------------
Shareholder Communications:
--------------------------------------------------------------------------------
                                                                   

Class A                                                               $1,040,406
Class B                                                                    5,434
Class C                                                                    7,893
Class Y                                                                    4,317
--------------------------------------------------------------------------------
  Total                                                               $1,058,050
--------------------------------------------------------------------------------


Included in "Due to affiliates" reflected on the Statement of Assets and
Liabilities is $328,059 in transfer agent fees and out-of-pocket reimbursements
payable to PIMSS at September 30, 2012.

4. Distribution Plan

The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the
Investment Company Act of 1940 with respect to its Class A, Class B 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 B and Class C shares. The fee for
Class B and 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 B and Class C
shares. Included in "Due to affiliates" reflected on the Statement of Assets and
Liabilities is $37,796 in distribution fees payable to PFD at September 30,
2012.

                                 Pioneer Value Fund | Annual Report | 9/30/12 35


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. Class B shares that are redeemed within five years
of purchase are subject to a CDSC at declining rates beginning at 4.00%, based
on the lower of cost or market value of shares being redeemed. Redemptions of
Class C shares within one year 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 September 30, 2012, CDSCs in the
amount of $2,164 were paid to PFD.

5. Expense Offset Arrangements

The Fund has entered into certain expense offset arrangements with PIMSS which
may result in a reduction in the Fund's total expenses due to interest earned on
cash held by PIMSS. For the year ended September 30, 2012, the Fund's expenses
were not reduced under such arrangements.

6. 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 January 20, 2012 was in the amount of $165
million. Under such facility, interest on borrowings was payable at the higher
of the London Interbank Offered Rate (LIBOR) on the borrowing date plus 1.25% on
an annualized basis or the Federal Funds Rate on the borrowing date plus 1.25%
on an annualized basis. The credit facility in effect as of February 15, 2012 is
in the amount of $215 million. Under such facility, depending on the type of
loan, interest on borrowings is payable at LIBOR plus 0.90% 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
Euro dollar 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 September 30, 2012, the Fund had no borrowings
under a credit facility.

36 Pioneer Value Fund | Annual Report | 9/30/12


7. Forward Foreign Currency Contracts

At September 30, 2012, the Fund had entered into various forward foreign
currency contracts that obligate the Fund to deliver or take delivery of
currencies at specified future maturity dates. Alternatively, prior to the
settlement date of a forward foreign currency contract, the Fund may close out
such contract by entering into an offsetting contract. The Fund held forward
foreign currency contracts during the month of October 2011. The value of
contracts open during the month of October was $886,875. There were no open
portfolio or settlement hedges at September 30, 2012.

8. Additional Disclosures about Derivative Instruments and Hedging Activities

The effect of derivative instruments on the Statement of Operations for the year
ended September 30, 2012, was as follows:



------------------------------------------------------------------------------------------------------
Derivatives Not                                                                         Change in
Accounted for as                                                        Realized Gain   Unrealized
Hedging Instruments                                                     or (Loss) on    Gain or (Loss)
Under Accounting           Location of Gain or (Loss)                   Derivatives     on Derivatives
Standards Codification     on Derivatives Recognized                    Recognized      Recognized
(ASC) 815                  in Income                                    in Income       in Income
------------------------------------------------------------------------------------------------------
                                                                               
Forward Foreign            Net realized loss on
  Currency Contracts       forward foreign currency contracts and other
                           assets and liabilities denominated in
                           foreign currencies
                                                                        $(129,527)
Forward Foreign            Change in unrealized gain on forward
  Currency Contracts       foreign currency contracts and other assets
                           and liabilities denominated in foreign
                           currencies                                                   $(10,716)


9. Pending Litigation

The Fund is currently involved in a litigation matter in Germany. A German
financial intermediary, now deceased, apparently opened an account in the name
of the plaintiffs, a married couple, and later misappropriated the assets. The
plaintiffs filed a lawsuit against the Fund and an affiliate seeking recovery
for the misappropriated assets, alleging negligence and breach of contract. The
Fund believes that these claims are without merit and is defending the matter
vigorously. As of September 30, 2012, it is reasonably possible that an adverse
outcome may result. Currently, the amount of any judgment cannot reasonably be
estimated. Under the terms of an indemnification agreement, PIM and certain
affiliates have agreed to indemnify the Fund for its losses and costs related to
this litigation should there be an adverse outcome.

                                 Pioneer Value Fund | Annual Report | 9/30/12 37


Report of Independent Registered Public Accounting Firm

To the Board of Trustees and Shareowners of
Pioneer Value Fund:
--------------------------------------------------------------------------------
We have audited the accompanying statement of assets and liabilities of Pioneer
Value Fund ("the Fund"), including the schedule of investments, as of September
30, 2012, 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 five 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.

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. We were
not engaged to perform an audit of the Fund's 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 and financial highlights, assessing the accounting principles used
and significant estimates made by management, and evaluating the overall
financial statement presentation. Our procedures included confirmation of
securities owned as of September 30, 2012, 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 Value Fund at September 30, 2012, 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 five years in
the period then ended, in conformity with U.S. generally accepted accounting
principles.

                                                 /s/ Ernst & Young LLP

Boston, Massachusetts
November 21, 2012

38 Pioneer Value Fund | Annual Report | 9/30/12


Trustees, Officers and Service Providers

Investment Adviser
Pioneer Investment Management, Inc.

Custodian and Sub-Administrator
Brown Brothers Harriman & Co.

Independent Registered Public Accounting Firm
Ernst & Young LLP

Principal Underwriter
Pioneer Funds Distributor, Inc.

Legal Counsel
Bingham McCutchen LLP

Shareowner Services and Transfer Agent
Pioneer Investment Management Shareholder 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 on the following pages, 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 56 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 Value Fund | Annual Report | 9/30/12 39


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 (61)        Trustee since 2006.           Chairman and Chief Executive         Director, Broadridge Financial
Chairman of the Board       Serves until a successor      Officer, Quadriserv, Inc.            Solutions, Inc. (investor
and Trustee                 trustee is elected or earlier (technology products for securities  communications and securities
                            retirement or removal.        lending industry) (2008 - present);  processing provider for financial
                                                          private investor (2004 - 2008); and  services industry) (2009 - present);
                                                          Senior Executive Vice President,     Director, Quadriserv, Inc. (2005 -
                                                          The Bank of New York (financial and  present); and Commissioner, New
                                                          securities services) (1986 - 2004)   Jersey State Civil Service
                                                                                               Commission (2011 - present)
------------------------------------------------------------------------------------------------------------------------------------
David R. Bock (68)          Trustee since 2005.           Managing Partner, Federal City       Director of Enterprise Community
Trustee                     Serves until a successor      Capital Advisors (corporate          Investment, Inc. (privately-held
                            trustee is elected or earlier advisory services company) (1997 -   affordable housing finance company)
                            retirement or removal.        2004 and 2008 - present); Interim    (1985 - 2010); Director of Oxford
                                                          Chief Executive Officer, Oxford      Analytica, Inc. (2008 - present);
                                                          Analytica, Inc. (privately held      Director of The Swiss Helvetia Fund,
                                                          research and consulting company)     Inc. (closed-end fund) (2010 -
                                                          (2010); Executive Vice President     present); and Director of New York
                                                          and Chief Financial Officer, I-trax, Mortgage Trust (publicly traded
                                                          Inc. (publicly traded health care    mortgage REIT) (2004 - 2009, 2012 -
                                                          services company) (2004 - 2007);     present)
                                                          and Executive Vice President and
                                                          Chief Financial Officer, Pedestal
                                                          Inc. (internet-based mortgage
                                                          trading company) (2000 - 2002)
------------------------------------------------------------------------------------------------------------------------------------


40 Pioneer Value Fund | Annual Report | 9/30/12




------------------------------------------------------------------------------------------------------------------------------------
Name, Age and               Term of Office and                                                 Other Directorships
Position Held with the Fund Length of Service             Principal Occupation                 Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                      
Benjamin M. Friedman (67)   Trustee since 2008.           William Joseph Maier Professor of    Trustee, Mellon Institutional Funds
Trustee                     Serves until a successor      Political Economy, Harvard           Investment Trust and Mellon
                            trustee is elected or earlier University (1972 - present)          Institutional Funds Master Portfolio
                            retirement or removal.                                             (oversaw 17 portfolios in fund
                                                                                               complex) (1989-2008)
------------------------------------------------------------------------------------------------------------------------------------
Margaret B.W. Graham (65)   Trustee since 1990.           Founding Director, Vice President    None
Trustee                     Serves until a successor      and Corporate Secretary, The
                            trustee is elected or earlier Winthrop Group, Inc. (consulting
                            retirement or removal.        firm) (1982-present); Desautels
                                                          Faculty of Management, McGill
                                                          University (1999 - present); and
                                                          Manager of Research Operations and
                                                          Organizational Learning, Xerox PARC,
                                                          Xerox's advance research center
                                                          (1990-1994)
------------------------------------------------------------------------------------------------------------------------------------
Marguerite A. Piret (64)    Trustee since 1982.           President and Chief Executive        Director of New America High Income
Trustee                     Serves until a successor      Officer, Newbury, Piret & Company,   Fund, Inc. (closed-end investment
                            trustee is elected or earlier Inc. (investment banking firm) (1981 company) (2004 - present); and
                            retirement or removal.        - present)                           member, Board of Governors,
                                                                                               Investment Company Institute (2000 -
                                                                                               2006)
------------------------------------------------------------------------------------------------------------------------------------
Stephen K. West (83)        Trustee since 1993.           Senior Counsel, Sullivan & Cromwell  Director, The Swiss Helvetia Fund,
Trustee                     Serves until a successor      LLP (law firm) (1998 - present); and Inc. (closed-end investment
                            trustee is elected or earlier Partner, Sullivan & Cromwell LLP     company); and Director, Invesco,
                            retirement or removal.        (prior to 1998)                      Ltd. (formerly AMVESCAP, PLC)
                                                                                               (investment manager) (1997-2005)
------------------------------------------------------------------------------------------------------------------------------------


                                 Pioneer Value Fund | Annual Report | 9/30/12 41


Interested Trustees



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and               Term of Office and                                                    Other Directorships
Position Held with the Fund Length of Service             Principal Occupation                    Held by Trustee
------------------------------------------------------------------------------------------------------------------------------------
                                                                                         
John F. Cogan, Jr. (86)*    Trustee since 1982.           Non-Executive Chairman and a            None
Trustee, President and      Serves until a successor      director of Pioneer Investment
Chief                       trustee is elected or earlier Management USA Inc. ("PIM-USA");
Executive Officer of the    retirement or removal.        Chairman and a director of Pioneer;
Fund                                                      Chairman and Director of Pioneer
                                                          Institutional Asset Management, Inc.
                                                          (since 2006); Director of Pioneer
                                                          Alternative Investment Management
                                                          Limited (Dublin) (until October
                                                          2011); President and a director of
                                                          Pioneer Alternative Investment
                                                          Management (Bermuda) Limited and
                                                          affiliated funds; Deputy Chairman and
                                                          a director of Pioneer Global Asset
                                                          Management S.p.A. ("PGAM") (until
                                                          April 2010); Director of Nano-C,
                                                          Inc. (since 2003); Director of Cole
                                                          Management Inc. (2004 - 2011);
                                                          Director of Fiduciary Counseling,
                                                          Inc. (until December 2011);
                                                          President of all of the Pioneer
                                                          Funds; and Retired Partner, Wilmer
                                                          Cutler Pickering Hale and Dorr LLP
------------------------------------------------------------------------------------------------------------------------------------
Daniel K. Kingsbury (53)*   Trustee since 2007.           Director, CEO and President of          None
Trustee and Executive       Serves until a successor      PIM-USA (since February 2007);
Vice President              trustee is elected or earlier Director and President of Pioneer
                            retirement or removal.        and Pioneer Institutional Asset
                                                          Management, Inc. (since February
                                                          2007); Executive Vice President of
                                                          all of the Pioneer Funds (since
                                                          March 2007); Director of PGAM (2007
                                                          - 2010); Head of New Europe
                                                          Division, PGAM (2000 - 2005); Head
                                                          of New Markets Division, PGAM (2005
                                                          - 2007)
------------------------------------------------------------------------------------------------------------------------------------


*  Mr. Cogan and Mr. Kingsbury are Interested Trustees because they are officers
   or directors of the Fund's investment adviser and certain of its affiliates.

42 Pioneer Value Fund | Annual Report | 9/30/12


Fund Officers



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and               Term of Office and                                                 Other Directorships
Position Held with the Fund Length of Service             Principal Occupation                 Held by Officer
------------------------------------------------------------------------------------------------------------------------------------
                                                                                      
Christopher J. Kelley (47)  Since 2010. Serves at         Vice President and Associate General None
Secretary                   the discretion of the Board.  Counsel of Pioneer since January
                                                          2008 and Secretary 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 (51)      Since 2010. Serves at         Fund Governance Director of Pioneer  None
Assistant Secretary         the discretion of the Board.  since December 2006 and Assistant
                                                          Secretary of all 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 (49)           Since 2010. Serves at         Counsel of Pioneer since June 2007   None
Assistant Secretary         the discretion of the Board.  and Assistant Secretary of all the
                                                          Pioneer Funds since June 2010; and
                                                          Vice President and Counsel at State
                                                          Street Bank from October 2004 to
                                                          June 2007
------------------------------------------------------------------------------------------------------------------------------------
Mark E. Bradley (52)        Since 2008. Serves at         Vice President - Fund Treasury of    None
Treasurer and Chief         the discretion of the Board.  Pioneer; Treasurer of all of the
Financial and Accounting                                  Pioneer Funds since March 2008;
Officer of the Fund                                       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
------------------------------------------------------------------------------------------------------------------------------------
Luis I. Presutti (47)       Since 2000. Serves at         Assistant Vice President - Fund      None
Assistant Treasurer         the discretion of the Board.  Treasury of Pioneer; and Assistant
                                                          Treasurer of all of the Pioneer
                                                          Funds
------------------------------------------------------------------------------------------------------------------------------------
Gary Sullivan (54)          Since 2002. Serves at         Fund Accounting Manager - Fund       None
Assistant Treasurer         the discretion of the Board.  Treasury of Pioneer; and Assistant
                                                          Treasurer of all of the Pioneer
                                                          Funds
------------------------------------------------------------------------------------------------------------------------------------


                                 Pioneer Value Fund | Annual Report | 9/30/12 43


Fund Officers (continued)



------------------------------------------------------------------------------------------------------------------------------------
Name, Age and               Term of Office and                                                 Other Directorships
Position Held with the Fund Length of Service             Principal Occupation                 Held by Officer
------------------------------------------------------------------------------------------------------------------------------------
                                                                                      
David F. Johnson (32)       Since 2009. Serves at         Fund Administration Manager - Fund   None
Assistant Treasurer         the discretion of the Board.  Treasury of Pioneer since November
                                                          2008; Assistant 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 (59)        Since 2010. Serves at         Chief Compliance Officer of Pioneer  None
Chief Compliance Officer    the discretion of the Board.  and of all the Pioneer Funds since
                                                          March 2010; 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
------------------------------------------------------------------------------------------------------------------------------------
Kelley O'Donnell (41)       Since 2006. Serves at the     Director--Transfer Agency Compliance None
Anti-Money Laundering       discretion of the Board.      of Pioneer and Anti-Money Laundering
Officer                                                   Officer of all the Pioneer
                                                          Funds since 2006
------------------------------------------------------------------------------------------------------------------------------------


44 Pioneer Value Fund | Annual Report | 9/30/12


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:
--------------------------------------------------------------------------------
PIMSS, Inc.
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
       Investment(R)

Pioneer 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) 2012 Pioneer Investments  19438-06-1112