Pioneer Select Mid Cap Growth Fund

Top 10 Portfolio Holdings as of 5/29/2015
Default: sorted by market value

Security Name Par / Shares Market Value
Acuity Brands, Inc. 38,026 $6,711,209
Advance Auto Parts, Inc. 106,869 $16,374,468
Affiliated Managers Group, Inc. 63,445 $14,190,109
Agrium, Inc. 23,547 $2,447,946
Akamai Technologies, Inc. 277,448 $21,160,959
Align Technology, Inc. 257,647 $15,631,443
Alkermes Plc 262,154 $16,017,609
Alliance Data Systems Corp. 15,981 $4,762,817
American Airlines Group, Inc. 512,679 $21,722,209
ANSYS, Inc. 70,966 $6,315,974
Autodesk, Inc. 151,251 $8,190,242
Avago Technologies, Ltd. 151,917 $22,494,350
B/E Aerospace Inc 117,491 $6,736,934
BankUnited, Inc. 140,687 $4,725,676
Berry Plastics Group, Inc. 183,158 $6,130,298
BorgWarner, Inc. 110,344 $6,637,192
Boston Scientific Corp. 1,273,511 $23,267,046
Broadcom Corp. 173,799 $9,880,473
C&J Energy Services, Ltd. 211,544 $3,179,506
Cabot Oil & Gas Corp. 391,685 $13,301,623
Cadence Design Systems, Inc. 314,813 $6,230,149
Cardinal Health, Inc. 217,815 $19,204,749
Carlisle Companies, Inc. 108,613 $10,768,979
Charles River Laboratories International, Inc. 216,463 $15,658,933
Chart Industries, Inc. 129,005 $4,187,502
Chipotle Mexican Grill, Inc. 17,491 $10,766,060
Cimarex Energy Co. 85,065 $9,825,858
Cintas Corp. 62,865 $5,412,048
comScore, Inc. 121,181 $6,856,421
Constellation Brands, Inc. 111,043 $13,090,859
Core Laboratories NV 61,393 $7,212,450
CoStar Group, Inc. 76,712 $16,025,904
Criteo SA (A.D.R.) 147,854 $7,101,428
CVS Health Corp. 105,864 $10,838,356
Cytec Industries, Inc. 72,103 $4,361,510
Dave & Buster's Entertainment, Inc. 244,486 $7,733,092
Diamond Foods, Inc. 15,910 $452,799
Discover Financial Services 293,139 $17,081,210
Dollar Tree, Inc. 261,229 $19,589,563
Dover Corp. 73,252 $5,523,201
Dynegy, Inc. 79,868 $2,582,931
Eagle Materials, Inc. 61,893 $5,166,828
Edwards Lifesciences Corp. 119,986 $15,684,570
Endo International Plc 218,552 $18,305,916
Endologix, Inc. 594,070 $9,915,028
F5 Networks, Inc. 69,218 $8,700,010
Facebook, Inc. 146,062 $11,566,650
Fleetmatics Group Plc 146,300 $6,116,803
Flotek Industries, Inc. 200,985 $2,309,318
Gartner, Inc. 67,963 $5,945,403
G-III Apparel Group, Ltd. 176,352 $10,027,375
Golar LNG, Ltd. 89,937 $4,272,907
Google, Inc. 9,418 $5,135,824
Google, Inc. 9,483 $5,045,999
H&R Block, Inc. 277,962 $8,819,734
Hanesbrands, Inc. 215,027 $6,850,760
Hilton Worldwide Holdings, Inc. 230,905 $6,687,009
HomeAway, Inc. 439,597 $12,339,488
Hormel Foods Corp. 109,511 $6,266,219
Hub Group, Inc. 129,160 $5,478,967
Insulet Corp. 256,788 $7,259,397
Intercontinental Exchange, Inc. 62,396 $14,774,125
Intuit, Inc. 97,704 $10,175,872
Jack in the Box, Inc. 67,115 $5,826,253
Jazz Pharmaceuticals Plc 105,590 $18,937,567
Kansas City Southern 43,948 $3,977,294
KBR, Inc. 355,754 $6,812,689
Keurig Green Mountain, Inc. 275,606 $23,768,261
Kirby Corp. 89,161 $6,839,540
Lear Corp. 218,104 $25,304,426
Level 3 Communications, Inc. 208,083 $11,544,445
Liberty Global Plc 95,000 $5,465,350
Liberty Global Plc 118,966 $6,394,423
LinkedIn Corp. 44,161 $8,608,304
Lithia Motors, Inc. 79,057 $8,415,618
Lorillard, Inc. 81,418 $5,901,177
Lowe's Companies, Inc. 150,376 $10,523,312
Macquarie Infrastructure Corp. 88,357 $7,478,536
ManpowerGroup, Inc. 127,989 $10,834,269
Martin Marietta Materials, Inc. 33,285 $4,959,798
Masonite International Corp. 83,865 $5,721,270
MasterCard, Inc. 85,639 $7,901,054
Mead Johnson Nutrition Co. 41,676 $4,055,075
Memorial Resource Development Corp. 652,826 $12,344,940
Methanex Corp. 144,644 $8,026,296
Mohawk Industries, Inc. 30,403 $5,674,416
Molson Coors Brewing Co. (Class B) 116,053 $8,515,969
Monster Beverage Corp. 98,087 $12,484,513
Mylan NV 125,894 $9,143,681
Netflix, Inc. 21,961 $13,704,982
Neurocrine Biosciences, Inc. 159,900 $7,013,214
Norwegian Cruise Line Holdings, Ltd. 111,447 $6,080,548
Oasis Petroleum, Inc. 294,279 $4,996,857
Omnicare, Inc. 114,520 $10,912,611
On Assignment, Inc. 115,123 $4,315,961
Packaging Corp of America 43,580 $3,014,864
Palo Alto Networks, Inc. 35,483 $6,014,014
Panera Bread Co. 17,723 $3,225,586
Performance Sports Group, Ltd. 200,474 $3,945,328
Qlik Technologies, Inc. 254,428 $9,202,661
Regal Beloit Corp. 73,953 $5,782,385
Rockwell Collins, Inc. 94,506 $8,996,026
Roper Technologies, Inc. 48,221 $8,436,746
Ross Stores, Inc. 70,934 $6,857,190
RPM International, Inc. 60,607 $3,032,168
Ryder System, Inc. 105,639 $9,681,814
Sabre Corp. 263,711 $6,880,220
Salesforce.com inc 113,331 $8,244,830
SBA Communications Corp. 119,054 $13,311,428
SEI Investments Co. 144,376 $6,906,948
SemGroup Corp. 78,991 $6,216,592
ServiceNow, Inc. 77,082 $5,905,252
Shire Plc (A.D.R.) 53,059 $13,803,299
Signature Bank/New York NY 52,338 $7,309,002
Signet Jewelers, Ltd. 59,431 $7,686,211
Skyworks Solutions, Inc. 270,972 $29,633,498
Sonic Corp. 242,016 $7,294,362
Splunk, Inc. 93,292 $6,308,405
SS&C Technologies Holdings, Inc. 94,154 $5,548,495
Synaptics, Inc. 71,433 $7,117,584
Tableau Software, Inc. 53,747 $6,084,698
TESARO, Inc. 115,008 $6,757,870
Tesoro Corp. 20,904 $1,850,004
The Blackstone Group LP 174,412 $7,639,246
The Kroger Co. 217,140 $15,807,792
The Men's Wearhouse, Inc. 105,472 $6,118,431
The NASDAQ OMX Group, Inc. 326,143 $16,877,900
The Sherwin-Williams Co. 26,771 $7,714,867
The TJX Companies, Inc. 108,909 $7,011,561
Towers Watson & Co. 115,250 $15,898,738
Tractor Supply Co. 135,399 $11,798,669
Twitter, Inc. 190,234 $6,975,881
Tyson Foods, Inc. 207,632 $8,813,978
Ulta Salon Cosmetics & Fragrance, Inc. 57,838 $8,827,236
United Continental Holdings, Inc. 234,136 $12,781,484
United Rentals, Inc. 45,173 $4,016,331
Ventas, Inc. 74,716 $4,970,108
Vertex Pharmaceuticals, Inc. 114,697 $14,714,478
WABCO Holdings, Inc. 125,118 $15,817,418
Wabtec Corp./DE 58,839 $5,901,552
WageWorks, Inc. 95,278 $4,085,521
WellCare Health Plans, Inc. 84,382 $7,229,006
Westlake Chemical Corp. 120,833 $8,519,935
Weyerhaeuser Co. 238,589 $7,768,458
Whirlpool Corp. 37,479 $6,905,506
Whiting Petroleum Corp. 305,398 $10,075,080
WR Grace & Co. 62,685 $6,138,742

The portfolio is actively managed, and current holdings may be different.

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