```

                                                             OMB APPROVAL
                                                     OMB Number:       3235-0578
                                                     Expires:  January 31, 2016
                                                     Estimated average burden
                                                     hours per response.....
                                                     10.5

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

                                   FORM N-Q

                   QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS
    OF REGISTERED MANAGEMENT INVESTMENT COMPANY

  Investment Company Act file number 811-21425

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

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

            Terrence J. Cullen, Pioneer Investment Management, Inc.,
                       60 State Street, Boston, MA 02109
                    (Name and address of agent for service)

Registrant's telephone number, including area code:  (617) 742-7825

Date of fiscal year end:  November 30

Date of reporting period:  February 28, 2014

Form N-Q is to be used by management investment companies, other than small
business investment companies registered on Form N-5 (239.24 and 274.5 of this
chapter), to file reports with the Commission, not later than 60 days after
close of the first and third fiscal quarters, pursuant to Rule 30b1-5 under
the Investment Company Act of 1940 (17 CFR 270.30b1-5).  The Commission may
use the information provided on Form N-Q in its regulatory, disclosure review,
inspection, and policymaking roles.

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

<PAGE>
ITEM 1. Schedule of Investments.

File the schedules as of the close of the reporting period as set forth in
ss. 210.12-12  12-14 of Regulation S-X [17 CFR 210.12-12  12-14]. The
schedules need not be audited.
```

```

```

|                                                                                                                                                                                                    |      |   |   | Pioneer Oak Ridge Small Cap Growth Fund                                      |   |          |   |   |   |   |   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------|--------|--------|------------------------------------------------------------------------------|--------|---------------|--------|--------|--------|--------|--------|
|                                                                                                                                                                                                    |      |   |   | Schedule of Investments 2/28/14                                              |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | Shares    |   |   |                                                                         | Value  |          |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | COMMON STOCKS - 94.1%                                                        |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Energy - 4.2%                                                                |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Oil & Gas Exploration & Production - 4.2%                            |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 882,300   |   |   | Approach Resources, Inc. *                                                   | $      | 19,648,821    |   |   |   |   |   |
|                                                                                                                                                                                                    | 437,699   |   |   | Gulfport Energy Corp. *                                                      |   | 28,931,904    |   |   |   |   |   |
|                                                                                                                                                                                                    | 2,000,000 |   |   | Halcon Resources Corp. *                                                     |   | 7,620,000     |   |   |   |   |   |
|                                                                                                                                                                                                    | 819,000   |   |   | Oasis Petroleum, Inc. *                                                      |   | 35,683,830    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 91,884,555    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Energy                                                                 | $      | 91,884,555    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Capital Goods - 19.0%                                                        |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Aerospace & Defense - 1.5%                                               |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,817,593 |   |   | The KEYW Holding Corp. *                                                     | $      | 33,261,952    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Building Products - 2.3%                                                     |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,007,732 |   |   | AO Smith Corp.                                                               | $      | 50,084,280    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Industrial Machinery - 11.0%                                                 |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 938,800   |   |   | Actuant Corp.                                                                | $      | 32,914,328    |   |   |   |   |   |
|                                                                                                                                                                                                    | 872,930   |   |   | Altra Industrial Motion Corp. *                                              |   | 30,901,722    |   |   |   |   |   |
|                                                                                                                                                                                                    | 401,738   |   |   | CLARCOR, Inc.                                                                |   | 23,272,682    |   |   |   |   |   |
|                                                                                                                                                                                                    | 852,400   |   |   | Colfax Corp. *                                                               |   | 60,631,212    |   |   |   |   |   |
|                                                                                                                                                                                                    | 247,604   |   |   | The Middleby Corp. *                                                         |   | 73,429,442    |   |   |   |   |   |
|                                                                                                                                                                                                    | 515,600   |   |   | TriMas Corp. *                                                               |   | 17,329,316    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 238,478,702   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Trading Companies & Distributors - 4.2%                                  |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,118,500 |   |   | Beacon Roofing Supply, Inc. *                                                | $      | 42,268,115    |   |   |   |   |   |
|                                                                                                                                                                                                    | 493,600   |   |   | Watsco, Inc.                                                                 |   | 48,560,368    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 90,828,483    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Capital Goods                                                          | $      | 412,653,417   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Commercial Services & Supplies - 3.6%                                    |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Environmental & Facilities Services - 1.6%                               |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 778,495   |   |   | Waste Connections, Inc. *                                                    | $      | 33,685,479    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Human Resource & Employment Services - 2.0%                              |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 751,900   |   |   | WageWorks, Inc. *                                                            | $      | 44,474,885    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Commercial Services & Supplies                                     | $      | 78,160,364    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Transportation - 1.3%                                                        |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Trucking - 1.3%                                                              |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,167,500 |   |   | Roadrunner Transportation Systems, Inc. *                                    | $      | 27,447,925    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Transportation                                                         | $      | 27,447,925    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Consumer Durables & Apparel - 2.9%                                       |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Footwear - 2.9%                                                              |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 299,000   |   |   | Deckers Outdoor Corp. *                                                      | $      | 22,230,650    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,563,880 |   |   | Wolverine World Wide, Inc.                                                   |   | 41,223,877    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 63,454,527    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Consumer Durables & Apparel                                        | $      | 63,454,527    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Consumer Services - 1.6%                                                     |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Restaurants - 1.6%                                                           |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,290,300 |   |   | Texas Roadhouse, Inc.                                                        | $      | 34,128,435    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Consumer Services                                                      | $      | 34,128,435    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Retailing - 5.4%                                                             |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Distributors - 0.8%                                                          |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 659,926   |   |   | LKQ Corp. *                                                                  | $      | 18,405,336    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Specialty Stores - 1.3%                                                      |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 580,100   |   |   | Vitamin Shoppe, Inc. *                                                       | $      | 27,142,879    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Automotive Retail - 3.3%                                                     |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 521,681   |   |   | Group 1 Automotive, Inc.                                                     | $      | 34,827,424    |   |   |   |   |   |
|                                                                                                                                                                                                    | 605,695   |   |   | Monro Muffler Brake, Inc.                                                    |   | 36,141,821    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 70,969,245    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Retailing                                                              | $      | 116,517,460   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Food & Staples Retailing - 1.6%                                          |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Food Distributors - 1.1%                                                     |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 317,500   |   |   | United Natural Foods, Inc. *                                                 | $      | 22,980,650    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Food Retail - 0.5%                                                           |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 353,000   |   |   | The Fresh Market, Inc. *                                                     | $      | 11,825,500    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Food & Staples Retailing                                           | $      | 34,806,150    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Food, Beverage & Tobacco - 0.8%                                          |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Packaged Foods & Meats - 0.8%                                            |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 441,000   |   |   | Annie's, Inc. *                                                              | $      | 16,528,680    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Food, Beverage & Tobacco                                           | $      | 16,528,680    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Health Care Equipment & Services - 13.0%                                 |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Health Care Equipment - 3.3%                                                 |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,732,639 |   |   | Globus Medical, Inc. *                                                       | $      | 40,994,239    |   |   |   |   |   |
|                                                                                                                                                                                                    | 441,700   |   |   | Sirona Dental Systems, Inc. *                                                |   | 31,122,182    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 72,116,421    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Health Care Supplies - 3.4%                                                  |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 527,000   |   |   | Align Technology, Inc. *                                                     | $      | 27,577,910    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,584,076 |   |   | Spectranetics Corp. *                                                        |   | 47,458,917    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 75,036,827    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Health Care Distributors - 2.6%                                              |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 342,835   |   |   | MWI Veterinary Supply, Inc. *                                                | $      | 55,854,678    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Health Care Facilities - 1.6%                                                |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 692,325   |   |   | Acadia Healthcare Co, Inc. *                                                 | $      | 34,228,548    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Health Care Technology - 2.1%                                                |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,567,409 |   |   | Omnicell, Inc. *                                                             | $      | 45,110,031    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Health Care Equipment & Services                                   | $      | 282,346,505   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Pharmaceuticals, Biotechnology & Life Sciences - 10.1%                   |   |          |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Biotechnology - 3.6%                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,386,300 |   |   | Keryx Biopharmaceuticals, Inc. *                                             | $      | 22,250,115    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,566,100 |   |   | NPS Pharmaceuticals, Inc. *                                                  |   | 54,782,178    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 77,032,293    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Pharmaceuticals - 6.5%                                                       |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 3,453,100 |   |   | Akorn, Inc. *                                                                | $      | 89,159,040    |   |   |   |   |   |
|                                                                                                                                                                                                    | 856,700   |   |   | Questcor Pharmaceuticals, Inc.                                               |   | 52,044,525    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 141,203,565   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Pharmaceuticals, Biotechnology & Life Sciences                     | $      | 218,235,858   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Banks - 2.1%                                                                 |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Regional Banks - 2.1%                                                        |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,336,858 |   |   | BankUnited, Inc. *                                                           | $      | 44,758,006    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Banks                                                                  | $      | 44,758,006    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Diversified Financials - 5.3%                                                |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Consumer Finance - 2.7%                                                      |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,074,697 |   |   | Portfolio Recovery Associates, Inc. *                                        | $      | 58,280,818    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Asset Management & Custody Banks - 0.9%                                  |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 104,300   |   |   | Affiliated Managers Group, Inc. *                                            | $      | 19,613,615    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Investment Banking & Brokerage - 1.7%                                    |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 760,280   |   |   | Stifel Financial Corp. *                                                     | $      | 36,561,865    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Diversified Financials                                                 | $      | 114,456,298   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Insurance - 0.6%                                                             |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Property & Casualty Insurance - 0.6%                                     |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 304,710   |   |   | ProAssurance Corp.                                                           | $      | 13,852,117    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Insurance                                                              | $      | 13,852,117    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Software & Services - 19.3%                                              |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Internet Software & Services - 0.7%                                      |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 2,153,200 |   |   | Dice Holdings, Inc. *                                                        | $      | 15,847,552    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | IT Consulting & Other Services - 4.7%                                    |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,026,505 |   |   | EPAM Systems, Inc. *                                                         | $      | 43,041,355    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,315,700 |   |   | Sapient Corp. *                                                              |   | 22,906,337    |   |   |   |   |   |
|                                                                                                                                                                                                    | 979,075   |   |   | Virtusa Corp. *                                                              |   | 35,608,958    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 101,556,650   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Data Processing & Outsourced Services - 6.2%                             |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,087,667 |   |   | Cardtronics, Inc. *                                                          | $      | 44,072,267    |   |   |   |   |   |
|                                                                                                                                                                                                    | 625,000   |   |   | MAXIMUS, Inc.                                                                |   | 29,868,750    |   |   |   |   |   |
|                                                                                                                                                                                                    | 624,810   |   |   | WEX, Inc. *                                                                  |   | 60,494,104    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 134,435,121   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Application Software - 7.2%                                                  |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 224,321   |   |   | ANSYS, Inc. *                                                                | $      | 18,735,290    |   |   |   |   |   |
|                                                                                                                                                                                                    | 540,840   |   |   | Ellie Mae, Inc. *                                                            |   | 16,766,040    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,125,554 |   |   | RealPage, Inc. *                                                             |   | 19,922,306    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,747,885 |   |   | Seachange International, Inc. *                                              |   | 18,440,187    |   |   |   |   |   |
|                                                                                                                                                                                                    | 612,100   |   |   | Solera Holdings, Inc. *                                                      |   | 41,879,882    |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,161,097 |   |   | Synchronoss Technologies, Inc. *                                             |   | 39,918,515    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         | $      | 155,662,220   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Systems Software - 0.5%                                                      |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 280,326   |   |   | Proofpoint, Inc. *                                                           | $      | 11,619,513    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Software & Services                                                | $      | 419,121,056   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Technology Hardware & Equipment - 1.7%                                   |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Electronic Components - 1.7%                                                 |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 1,835,000 |   |   | InvenSense, Inc. *                                                           | $      | 36,975,250    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Technology Hardware & Equipment                                    | $      | 36,975,250    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Semiconductors & Semiconductor Equipment - 1.6%                          |   |          |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Semiconductors - 1.6%                                                        |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | 591,840   |   |   | Hittite Microwave Corp. *                                                    | $      | 34,906,723    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Total Semiconductors & Semiconductor Equipment                           | $      | 34,906,723    |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | TOTAL COMMON STOCKS                                                          |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | (Cost $1,333,358,745)                                                        | $      | 2,040,233,326 |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | TOTAL INVESTMENT IN SECURITIES - 94.1%                                       |   |          |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | (Cost $1,333,358,745) (a)                                                    | $      | 2,040,233,326 |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | OTHER ASSETS & LIABILITIES - 5.9%                                        | $      | 127,501,876   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | TOTAL NET ASSETS - 100.0%                                                    | $      | 2,167,735,202 |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | *         |   |   | Non-income producing security.                                               |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    | (a)       |   |   | At January 31, 2014, the net unrealized appreciation on investments based on |   |          |
|                                                                                                                                                                                                    |      |   |   | cost for federal, Income tax purposes of $1,334,277,999 was as follows:      |   |          |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Aggregate gross unrealized appreciation for all investments in which         |   |          |   |   |
|                                                                                                                                                                                                    |      |   |   | there is an excess of value over tax cost                                    | $      | 737,330,519   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Aggregate gross unrealized depreciation for all investments in which         |   |          |   |   |
|                                                                                                                                                                                                    |      |   |   | there is an excess of tax cost over value                                    |   | (31,375,192)  |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   | Net unrealized appreciation                                                  | $      | 705,955,327   |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
| Various inputs are used in determining the value of the Fund's investments.  These inputs are summarized in the three broad levels listed below.                                              |
| Highest priority is given to Level 1 inputs and lowest priority is given to Level 3.                                                                                                                    |      |   |   |                                                                         |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
| Level 1 – quoted prices in active markets for identical securities                                                                                                                                |      |   |   |                                                                         |   |          |   |
| Level 2 – other significant observable inputs (Including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements - Note 1A. |
| Level 3 – significant unobservable inputs (Including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements - Note 1A.                            |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |
| 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 January 31, 2014, in valuing the Fund's assets:                                                                                                     |      |   |
|                                                                                                                                                                                                    |      |   |   |                                                                         |   |          |   |   |   |   |   |

|          |   | Level 1 |          |   | Level 2 |   |   | Level 3 |   |   | Total |   |
|---------------|--------|---------|---------------|--------|---------|--------|--------|---------|--------|--------|-------|--------|
| Common Stocks |   | $       | 2,040,233,326 |   |    | $      | -      |    |   | $      | -     |   |   | $ | 2,040,233,326 |   |
| Total         |   | $       | 2,040,233,326 |   |    | $      | -      |    |   | $      | -     |   |   | $ | 2,040,233,326 |   |

|                                                                                                                                                                                                                     |   |   |   | Pioneer Oak Ridge Large Cap Growth Fund                                       |   |                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|-------------------------------------------------------------------------------|--------|-----------------------------------------------|
|                                                                                                                                                                                                                     |   |   |   | Schedule of Investments 2/28/14                                               |   |                                          |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     | Shares |   |   |                                                                          |   | Value                                         |
|                                                                                                                                                                                                                     |   |   |   | COMMON STOCKS - 98.0%                                                         |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Energy - 4.4%                                                                 |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Oil & Gas Equipment & Services - 1.4%                                 |   |                                          |
|                                                                                                                                                                                                                     | 14,205 |   |   | Schlumberger, Ltd.                                                            | $      | 1,321,065                                     |
|                                                                                                                                                                                                                     |   |   |   | Oil & Gas Exploration & Production - 3.0%                             |   |                                          |
|                                                                                                                                                                                                                     | 8,180  |   |   | Concho Resources, Inc. *                                                      | $      | 990,843                                       |
|                                                                                                                                                                                                                     | 53,575 |   |   | Denbury Resources, Inc. *                                                     |   | 876,487                                       |
|                                                                                                                                                                                                                     | 22,650 |   |   | Southwestern Energy Co. *                                                     |   | 936,351                                       |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 2,803,681                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Energy                                                                  | $      | 4,124,746                                     |
|                                                                                                                                                                                                                     |   |   |   | Materials - 4.1%                                                              |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Industrial Gases - 1.9%                                                       |   |                                          |
|                                                                                                                                                                                                                     | 13,845 |   |   | Praxair, Inc.                                                                 | $      | 1,804,973                                     |
|                                                                                                                                                                                                                     |   |   |   | Specialty Chemicals - 2.2%                                                    |   |                                          |
|                                                                                                                                                                                                                     | 19,685 |   |   | Ecolab, Inc.                                                                  | $      | 2,121,059                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Materials                                                               | $      | 3,926,032                                     |
|                                                                                                                                                                                                                     |   |   |   | Capital Goods - 13.5%                                                         |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Aerospace & Defense - 4.9%                                                |   |                                          |
|                                                                                                                                                                                                                     | 9,350  |   |   | Precision Castparts Corp.                                                     | $      | 2,411,178                                     |
|                                                                                                                                                                                                                     | 19,235 |   |   | United Technologies Corp.                                                     |   | 2,250,880                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 4,662,058                                     |
|                                                                                                                                                                                                                     |   |   |   | Electrical Components & Equipment - 2.7%                                  |   |                                          |
|                                                                                                                                                                                                                     | 47,192 |   |   | AMETEK, Inc.                                                                  | $      | 2,512,502                                     |
|                                                                                                                                                                                                                     |   |   |   | Industrial Conglomerates - 3.0%                                               |   |                                          |
|                                                                                                                                                                                                                     | 37,395 |   |   | Danaher Corp.                                                                 | $      | 2,860,344                                     |
|                                                                                                                                                                                                                     |   |   |   | Industrial Machinery - 2.9%                                                   |   |                                          |
|                                                                                                                                                                                                                     | 32,630 |   |   | Illinois Tool Works, Inc.                                                     | $      | 2,691,975                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Capital Goods                                                           | $      | 12,726,879                                    |
|                                                                                                                                                                                                                     |   |   |   | Consumer Durables & Apparel - 3.8%                                        |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Apparel, Accessories & Luxury Goods - 3.8%                                |   |                                          |
|                                                                                                                                                                                                                     | 24,450 |   |   | Michael Kors Holdings, Ltd. *                                                 | $      | 2,396,834                                     |
|                                                                                                                                                                                                                     | 20,855 |   |   | VF Corp.                                                                      |   | 1,221,894                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 3,618,728                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Consumer Durables & Apparel                                         | $      | 3,618,728                                     |
|                                                                                                                                                                                                                     |   |   |   | Consumer Services - 3.3%                                                      |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Hotels, Resorts & Cruise Lines - 2.3%                                     |   |                                          |
|                                                                                                                                                                                                                     | 40,540 |   |   | Marriott International, Inc.                                                  | $      | 2,198,484                                     |
|                                                                                                                                                                                                                     |   |   |   | Restaurants - 1.0%                                                            |   |                                          |
|                                                                                                                                                                                                                     | 13,215 |   |   | Starbucks Corp.                                                               | $      | 937,736                                       |
|                                                                                                                                                                                                                     |   |   |   | Total Consumer Services                                                       | $      | 3,136,220                                     |
|                                                                                                                                                                                                                     |   |   |   | Retailing - 16.0%                                                             |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Distributors - 1.1%                                                           |   |                                          |
|                                                                                                                                                                                                                     | 36,855 |   |   | LKQ Corp. *                                                                   | $      | 1,027,886                                     |
|                                                                                                                                                                                                                     |   |   |   | Internet Retail - 2.1%                                                        |   |                                          |
|                                                                                                                                                                                                                     | 1,440  |   |   | priceline.com, Inc. *                                                         | $      | 1,942,330                                     |
|                                                                                                                                                                                                                     |   |   |   | General Merchandise Stores - 1.5%                                             |   |                                          |
|                                                                                                                                                                                                                     | 25,710 |   |   | Dollar Tree, Inc. *                                                           | $      | 1,408,137                                     |
|                                                                                                                                                                                                                     |   |   |   | Apparel Retail - 2.4%                                                         |   |                                          |
|                                                                                                                                                                                                                     | 37,305 |   |   | The TJX Companies, Inc.                                                       | $      | 2,292,765                                     |
|                                                                                                                                                                                                                     |   |   |   | Home Improvement Retail - 2.2%                                                |   |                                          |
|                                                                                                                                                                                                                     | 25,440 |   |   | The Home Depot, Inc.                                                          | $      | 2,086,843                                     |
|                                                                                                                                                                                                                     |   |   |   | Specialty Stores - 3.0%                                                       |   |                                          |
|                                                                                                                                                                                                                     | 50,520 |   |   | Sally Beauty Holdings, Inc. *                                                 | $      | 1,449,924                                     |
|                                                                                                                                                                                                                     | 15,460 |   |   | Ulta Salon Cosmetics & Fragrance, Inc. *                                  |   | 1,386,607                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 2,836,531                                     |
|                                                                                                                                                                                                                     |   |   |   | Automotive Retail - 2.3%                                                      |   |                                          |
|                                                                                                                                                                                                                     | 14,740 |   |   | O'Reilly Automotive, Inc. *                                                   | $      | 2,223,529                                     |
|                                                                                                                                                                                                                     |   |   |   | Homefurnishing Retail - 1.4%                                                  |   |                                          |
|                                                                                                                                                                                                                     | 19,055 |   |   | Bed Bath & Beyond, Inc. *                                                 | $      | 1,292,310                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Retailing                                                               | $      | 15,110,331                                    |
|                                                                                                                                                                                                                     |   |   |   | Food, Beverage & Tobacco - 4.8%                                           |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Soft Drinks - 2.0%                                                            |   |                                          |
|                                                                                                                                                                                                                     | 23,280 |   |   | PepsiCo., Inc.                                                                | $      | 1,864,030                                     |
|                                                                                                                                                                                                                     |   |   |   | Packaged Foods & Meats - 2.8%                                             |   |                                          |
|                                                                                                                                                                                                                     | 17,980 |   |   | Mead Johnson Nutrition Co.                                                    | $      | 1,466,269                                     |
|                                                                                                                                                                                                                     | 34,515 |   |   | Mondelez International, Inc.                                                  |   | 1,174,545                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 2,640,814                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Food, Beverage & Tobacco                                            | $      | 4,504,844                                     |
|                                                                                                                                                                                                                     |   |   |   | Household & Personal Products - 1.8%                                      |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Household Products - 1.8%                                                     |   |                                          |
|                                                                                                                                                                                                                     | 25,440 |   |   | Church & Dwight Co., Inc.                                                 | $      | 1,729,411                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Household & Personal Products                                       | $      | 1,729,411                                     |
|                                                                                                                                                                                                                     |   |   |   | Health Care Equipment & Services - 8.6%                                   |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Health Care Equipment - 0.8%                                                  |   |                                          |
|                                                                                                                                                                                                                     | 1,710  |   |   | Intuitive Surgical, Inc. *                                                    | $      | 760,659                                       |
|                                                                                                                                                                                                                     |   |   |   | Health Care Distributors - 2.3%                                               |   |                                          |
|                                                                                                                                                                                                                     | 30,470 |   |   | Cardinal Health, Inc.                                                         | $      | 2,179,519                                     |
|                                                                                                                                                                                                                     |   |   |   | Health Care Services - 2.9%                                                   |   |                                          |
|                                                                                                                                                                                                                     | 36,405 |   |   | Express Scripts Holding Co. *                                                 | $      | 2,741,661                                     |
|                                                                                                                                                                                                                     |   |   |   | Health Care Technology - 2.6%                                                 |   |                                          |
|                                                                                                                                                                                                                     | 39,550 |   |   | Cerner Corp. *                                                                | $      | 2,427,184                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Health Care Equipment & Services                                    | $      | 8,109,023                                     |
|                                                                                                                                                                                                                     |   |   |   | Pharmaceuticals, Biotechnology & Life Sciences - 8.9%                     |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Biotechnology - 5.9%                                                          |   |                                          |
|                                                                                                                                                                                                                     | 24,180 |   |   | Celgene Corp. *                                                               | $      | 3,886,936                                     |
|                                                                                                                                                                                                                     | 20,405 |   |   | Gilead Sciences, Inc. *                                                       |   | 1,689,330                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 5,576,266                                     |
|                                                                                                                                                                                                                     |   |   |   | Pharmaceuticals - 3.0%                                                        |   |                                          |
|                                                                                                                                                                                                                     | 30,560 |   |   | Johnson & Johnson                                                         | $      | 2,815,187                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Pharmaceuticals, Biotechnology & Life Sciences                      | $      | 8,391,453                                     |
|                                                                                                                                                                                                                     |   |   |   | Diversified Financials - 5.8%                                                 |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Specialized Finance - 2.0%                                                    |   |                                          |
|                                                                                                                                                                                                                     | 8,990  |   |   | IntercontinentalExchange Group, Inc.                                          | $      | 1,877,472                                     |
|                                                                                                                                                                                                                     |   |   |   | Asset Management & Custody Banks - 2.4%                                   |   |                                          |
|                                                                                                                                                                                                                     | 12,225 |   |   | Affiliated Managers Group, Inc. *                                             | $      | 2,298,911                                     |
|                                                                                                                                                                                                                     |   |   |   | Investment Banking & Brokerage - 1.4%                                     |   |                                          |
|                                                                                                                                                                                                                     | 8,090  |   |   | The Goldman Sachs Group, Inc.                                                 | $      | 1,346,580                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Diversified Financials                                                  | $      | 5,522,963                                     |
|                                                                                                                                                                                                                     |   |   |   | Software & Services - 15.0%                                               |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Internet Software & Services - 2.9%                                       |   |                                          |
|                                                                                                                                                                                                                     | 1,170  |   |   | Google, Inc. *                                                                | $      | 1,422,310                                     |
|                                                                                                                                                                                                                     | 6,200  |   |   | LinkedIn Corp. *                                                              |   | 1,265,048                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 2,687,358                                     |
|                                                                                                                                                                                                                     |   |   |   | IT Consulting & Other Services - 4.8%                                     |   |                                          |
|                                                                                                                                                                                                                     | 10,425 |   |   | Cognizant Technology Solutions Corp. *                                        | $      | 1,084,826                                     |
|                                                                                                                                                                                                                     | 27,955 |   |   | Gartner, Inc. *                                                               |   | 1,944,550                                     |
|                                                                                                                                                                                                                     | 8,360  |   |   | International Business Machines Corp.                                         |   | 1,548,021                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 4,577,397                                     |
|                                                                                                                                                                                                                     |   |   |   | Data Processing & Outsourced Services - 3.2%                              |   |                                          |
|                                                                                                                                                                                                                     | 13,215 |   |   | Visa, Inc.                                                                    | $      | 2,985,797                                     |
|                                                                                                                                                                                                                     |   |   |   | Systems Software - 4.1%                                                       |   |                                          |
|                                                                                                                                                                                                                     | 25,980 |   |   | Check Point Software Technologies, Ltd. *                                     | $      | 1,751,572                                     |
|                                                                                                                                                                                                                     | 55,100 |   |   | Oracle Corp.                                                                  |   | 2,154,961                                     |
|                                                                                                                                                                                                                     |   |   |   |                                                                          | $      | 3,906,533                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Software & Services                                                 | $      | 14,157,085                                    |
|                                                                                                                                                                                                                     |   |   |   | Technology Hardware & Equipment - 8.0%                                    |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Communications Equipment - 2.9%                                               |   |                                          |
|                                                                                                                                                                                                                     | 35,955 |   |   | Qualcomm, Inc.                                                                | $      | 2,707,052                                     |
|                                                                                                                                                                                                                     |   |   |   | Computer Hardware - 3.9%                                                      |   |                                          |
|                                                                                                                                                                                                                     | 7,010  |   |   | Apple, Inc.                                                                   | $      | 3,688,942                                     |
|                                                                                                                                                                                                                     |   |   |   | Computer Storage & Peripherals - 1.2%                                     |   |                                          |
|                                                                                                                                                                                                                     | 44,585 |   |   | EMC Corp.                                                                     | $      | 1,175,706                                     |
|                                                                                                                                                                                                                     |   |   |   | Total Technology Hardware & Equipment                                     | $      | 7,571,700                                     |
|                                                                                                                                                                                                                     |   |   |   | TOTAL COMMON STOCKS                                                           |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | (Cost $53,702,961)                                                            | $      | 92,629,415                                    |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | TOTAL INVESTMENT IN SECURITIES - 98.0%                                        |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | (Cost $53,702,961) (a)                                                        | $      | 92,629,415                                    |
|                                                                                                                                                                                                                     |   |   |   | OTHER ASSETS & LIABILITIES - 2.0%                                         | $      | 1,928,573                                     |
|                                                                                                                                                                                                                     |   |   |   | TOTAL NET ASSETS - 100.0%                                                     | $      | 94,557,988                                    |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     | *      |   |   | Non-income producing security.                                                |   |                                          |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     | (a)    |   |   | At February 28, 2014, the net unrealized appreciation on investments based on |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | cost for federal income tax purposes of $53,812,443 was as follows:           |   |                                          |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Aggregate gross unrealized appreciation for all investments in which          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | there is an excess of value over tax cost                                     | $      |    39,113,167                  |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Aggregate gross unrealized depreciation for all investments in which          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | there is an excess of tax cost over value                                     |   |       (296,195) |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   | Net unrealized appreciation                                                   | $      |    38,816,972                  |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
| Various inputs are used in determining the value of the Fund's investments.  These inputs are summarized in the three broad levels listed below.                                                               |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
| Level 1 – quoted prices in active markets for identical securities                                                                                                                                                 |   |   |
| Level 2 – other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.)  See Notes to Financial Statements — Note 1A. |
| Level 3 – significant unobservable inputs (including the Portfolio's own assumptions in determining fair value of investments)  See Notes to Financial Statements — Note 1A.                       |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
| 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) as Level 3.                                                                                                                        |   |   |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |
| The following is a summary of the inputs used as of February 28, 2014, in valuing the Funds's investments:                                                                                                               |   |   |
|                                                                                                                                                                                                                     |   |   |   |                                                                          |   |                                          |

----

|                                                                                        |   | Level 1 |       |   | Level 2 |   |   | Level 3 |   |   | Total  |   |
|---------------------------------------------------------------------------------------------|--------|---------|------------|--------|---------|--------|--------|---------|--------|--------|--------|--------|
| Common Stocks                                                                               |   | $       | 92,629,415 |   |    | $      | -      |    |   | $      | -      |   |   | $ | 92,629,415 |   |
| Total                                                                                       |   | $       | 92,629,415 |   |    | $      | -      |    |   | $      | -      |   |   | $ | 92,629,415 |   |
|                                                                                        |   |    |       |   |    |   |   |    |   |   |   |   |   |   |   |   |
| During the year ended February 28, 2014, there were no transfers between Levels 1, 2 and 3. |   |    |       |   |    |   |   |    |   |   |   |   |   |