Pioneer High Yield Fund

Top 10 Portfolio Holdings as of 1/30/2015
Default: sorted by market value

Security Name Par / Shares Market Value
14112z Zero% 01feb19 4,500,000 $4,562,100
AAF Holdings LLC, 12.0%, 7/1/19 (144A) (PIK) 3,152,378 $3,057,807
Activision Blizzard, Inc., 6.125%, 9/15/23 (144A) 3,285,000 $3,656,661
Advanced Micro Devices, Inc., 6.75%, 3/1/19 4,205,000 $4,113,016
AdvancePierre Foods, Inc., Term Loan (First Lien), 7/10/17 8,497 $8,452
AECOM, 5.75%, 10/15/22 (144A) 1,385,000 $1,474,496
AECOM, 5.875%, 10/15/24 (144A) 1,390,000 $1,476,899
AES Corp. Virginia, 5.5%, 3/15/24 1,650,000 $1,688,408
Aetna, Inc. 84,640 $7,771,645
Affinion Group, Inc., Tranche B Term Loan, 4/30/18 1,983,072 $1,859,130
Aguila 3 SA, 7.875%, 1/31/18 (144A) 1,700,000 $1,741,809
Akamai Technologies, Inc., 0.0%, 2/15/19 (144A) 4,555,000 $4,609,091
Albany Molecular Research, Inc., 2.25%, 11/15/18 2,990,000 $3,643,315
Alere, Inc., 3.0%, 5/15/16 9,460,000 $10,324,013
Alere, Inc., 3.0% (Perpetual) 58,582 $18,101,838
Alliance HealthCare Services, Inc., Initial Term Loan, 6/3/19 1,182,005 $1,170,185
Alliance One International, Inc., 9.875%, 7/15/21 8,460,000 $7,101,230
Alliant Holdings I, Inc., Initial Term Loan, 12/20/19 1,236,483 $1,219,096
Allison Transmission, Inc., Term B-3 Loan, 8/23/19 7,424 $7,400
Ally Financial, Inc., 7.0% (Perpetual) (144A) 6,450 $6,482,452
Alpha Natural Resources, Inc., 3.75%, 12/15/17 4,705,000 $1,672,235
Altice Financing SA, 6.625%, 2/15/23 (144A) 1,840,000 $1,840,000
Altrl Zero% 30jun16 4,064,365 $2,893,828
Altrl Zero% 30jun17 1,680,000 $1,688,064
American Energy - Utica LLC, 3.5%, 3/1/21 (144A) (PIK) 3,365,000 $2,236,323
AMG Capital Trust II, 5.15%, 10/15/37 48,000 $2,943,000
Amsted Industries, Inc., 5.0%, 3/15/22 (144A) 5,445,000 $5,479,788
Antero Resources Finance Corp., 6.0%, 12/1/20 3,360,000 $3,376,800
Apex Tool Group LLC, 7.0%, 2/1/21 (144A) 6,901,000 $6,245,405
Ardagh Finance Holdings SA, 8.625%, 6/15/19 (144A) (PIK) 3,653,453 $3,680,017
Ardagh Packaging Finance Plc, 6.75%, 1/31/21 (144A) 3,350,000 $3,396,691
Ardagh Packaging Finance Plc, 7.0%, 11/15/20 (144A) 4,300,000 $757,706
Ardent Medical Services, Inc., Term Loan (First Lien), 7/2/18 1,950,757 $1,955,025
ARIAD Pharmaceuticals, Inc., 3.625%, 6/15/19 (144A) 1,340,000 $1,328,619
Arlington Flt% 01aug15 1,200,000 $1,311,600
Ascent Capital Group, Inc., 4.0%, 7/15/20 2,710,000 $2,077,968
Audatex North America, Inc., 6.0%, 6/15/21 (144A) 2,350,000 $2,462,017
Aviv Healthcare Properties LP, 7.75%, 2/15/19 2,675,000 $2,880,269
Axalta Coating Systems US Holdings, Inc., Refinanced Term B Loan, 2/1/20 1,493,391 $1,464,806
Axiall Corp. 127,734 $5,652,230
Banc of America Commercial Mortgage Trust 2007-5, Floating Rate Note, 2/10/51 2,000,000 $2,055,260
Bank of America Corp., Floating Rate Note, 9/29/49 4,600,000 $4,820,603
Bankrate, Inc., 6.125%, 8/15/18 (144A) 3,400,000 $3,436,526
Basic Energy Services, Inc., 7.75%, 10/15/22 6,485,000 $4,557,784
Berkeley-Kane Flt% 12jun15 1,004,200 $1,042,259
BioMarin Pharmaceutical, Inc., 0.75%, 10/15/18 1,920,000 $2,412,640
BioMarin Pharmaceutical, Inc., 1.5%, 10/15/20 1,920,000 $2,480,480
Bio-Rad Laboratories, Inc. 46,569 $5,330,753
BioScrip, Inc. 255,259 $1,467,739
BioScrip, Inc., 8.875%, 2/15/21 (144A) 3,675,000 $3,384,394
BioScrip, Inc., Delayed Draw Term Loan, 7/31/20 1,232,125 $1,231,099
BioScrip, Inc., Initial Term B Loan, 7/31/20 2,053,542 $2,051,832
Blue Danube, Ltd., Floating Rate Note, 4/10/15 (Cat Bond) (144A) 250,000 $251,634
Bombardier, Inc., 6.0%, 10/15/22 (144A) 2,250,000 $2,160,375
Bristow Group, Inc., 6.25%, 10/15/22 4,245,000 $4,121,482
Brocade Communications Systems, Inc., 1.375%, 1/1/20 (144A) 2,595,000 $2,659,938
Brookfield Residential Properties, Inc., 6.5%, 12/15/20 (144A) 2,100,000 $2,169,942
Brown Shoe Co, Inc., 7.125%, 5/15/19 2,350,000 $2,476,410
Calfrac Holdings LP, 7.5%, 12/1/20 (144A) 2,080,000 $1,804,400
Calumet Specialty Products Partners LP, 6.5%, 4/15/21 (144A) 6,525,000 $5,769,006
Cambium Learning Group, Inc., 9.75%, 2/15/17 3,695,000 $3,805,696
CAM Mortgage Trust 2014-2, Floating Rate Note, 5/15/48 (144A) 575,000 $577,953
Cardtronics, Inc., 1.0%, 12/1/20 6,345,000 $5,962,978
Carriage Services, Inc., 2.75%, 3/14/21 (144A) 2,195,000 $2,488,063
Carrizo Oil & Gas, Inc., 7.5%, 9/15/20 2,150,000 $2,157,167
Carrizo Oil & Gas, Inc., 8.625%, 10/15/18 10,236,000 $10,511,306
CCO Holdings LLC, 6.5%, 4/30/21 9,250,000 $9,887,608
Cengage Learning Holdings II LP 13,966 $314,933
CenturyLink, Inc., 5.8%, 3/15/22 3,625,000 $3,894,740
CenturyLink, Inc., 6.45%, 6/15/21 3,300,000 $3,599,448
Cepheid, 1.25%, 2/1/21 (144A) 1,905,000 $2,106,216
CEVA GROUP Plc 2,282 $1,654,494
CEVA GROUP Plc, 0.0%, 12/31/14 4,940 $3,581,536
Chaparral Energy, Inc., 8.25%, 9/1/21 3,310,000 $2,033,581
Chesapeake Energy Corp., 5.375%, 6/15/21 8,435,000 $8,556,195
CHS, 8.0%, 11/15/19 11,400,000 $12,333,533
Ciena Corp., 0.875%, 6/15/17 1,196,000 $1,182,358
Cigna Corp. 63,711 $6,806,246
Cincinnati Bell, Inc., 8.375%, 10/15/20 13,358,000 $14,380,351
Cinedigm Digital Funding I LLC, Term Loan, 2/28/18 1,001,410 $1,002,662
Citicorp Residential Mortgage Trust Series 2006-2, 5.918%, 9/25/36 (Step) 1,560,000 $1,405,536
Citigroup, Inc., Floating Rate Note (Perpetual) 411,000 $11,138,100
Citigroup, Inc., Floating Rate Note (Perpetual) 2,375,000 $2,436,644
Citrix Systems, Inc., 0.5%, 4/15/19 (144A) 2,470,000 $2,556,999
COBALT CMBS Commercial Mortgage Trust 2007-C3, Floating Rate Note, 5/15/46 1,935,000 $1,845,224
COBALT CMBS Commercial Mortgage Trust 2007-C3, Floating Rate Note, 5/15/46 595,000 $518,670
Cobalt International Energy, Inc., 2.625%, 12/1/19 7,895,000 $5,314,322
COMM 2014-KYO Mortgage Trust, Floating Rate Note, 6/11/27 (144A) 2,650,000 $2,642,540
Commercial Vehicle Group, Inc. 482,433 $2,667,854
Comstock Resources, Inc., 9.5%, 6/15/20 3,580,000 $1,869,257
Concho Resources, Inc., 5.5%, 4/1/23 3,675,000 $3,742,375
Concho Resources, Inc., 6.5%, 1/15/22 2,925,000 $3,050,450
Constellation Brands, Inc., 3.75%, 5/1/21 4,100,000 $4,179,438
Corsicanto, Ltd., 3.5%, 1/15/32 4,423,000 $2,616,450
Crestwood Midstream Partners LP, 6.125%, 3/1/22 4,810,000 $4,800,480
Crown Cork & Seal Co, Inc., 7.375%, 12/15/26 13,120,000 $14,686,838
Cubist Pharmaceuticals, Inc., 1.125%, 9/1/18 1,200,000 $1,615,125
Cubist Pharmaceuticals, Inc., 1.875%, 9/1/20 1,630,000 $2,256,022
CWGS Group LLC, Term Loan, 2/20/20 7,015,125 $6,988,818
DAE Aviation Holdings, Inc., Replacement Tranche B-1 Loan, 11/2/18 1,895,001 $1,895,588
Denbury Resources, Inc., 5.5%, 5/1/22 4,670,000 $4,173,813
DigitalGlobe, Inc., 5.25%, 2/1/21 (144A) 4,350,000 $4,291,493
DR Horton, Inc., 5.75%, 8/15/23 5,045,000 $5,557,138
Dycom Investments, Inc., 7.125%, 1/15/21 3,000,000 $3,129,500
DynCorp International, Inc., 10.375%, 7/1/17 1,583,000 $1,438,386
Embarcadero Reinsurance, Ltd., Floating Rate Note, 2/13/15 (Cat Bond) (144A) 500,000 $508,625
EMC Corp./MA 103,800 $2,691,534
Emergent Biosolutions, Inc., 2.875%, 1/15/21 (144A) 6,697,000 $7,697,550
Emulex Corp., 1.75%, 11/15/18 3,295,000 $3,148,025
Endologix, Inc., 2.25%, 12/15/18 3,015,000 $2,874,803
Energy & Exploration Partners, Inc., 8.0%, 7/1/19 (144A) 4,155,000 $1,398,850
Energy Transfer Equity LP, 5.875%, 1/15/24 3,520,000 $3,661,895
Energy XXI, Ltd., 3.0%, 12/15/18 1,000,000 $306,293
Energy XXI Gulf Coast, Inc., 7.5%, 12/15/21 3,865,000 $1,795,615
Entegris, Inc., 6.0%, 4/1/22 (144A) 5,100,000 $5,253,000
EP Energy LLC, 9.375%, 5/1/20 13,000,000 $13,402,188
EPL Oil & Gas, Inc., 8.25%, 2/15/18 5,205,000 $3,620,294
Equinix, Inc., 5.375%, 4/1/23 5,465,000 $5,767,852
Evergreen Skills Lux Sarl, Initial Term Loan (First Lien), 4/23/21 1,995,000 $1,939,306
Expert Global Solutions, Inc., Term B Advance (First Lien), 4/3/18 4,813,691 $4,797,647
Exterran Holdings, Inc., 7.25%, 12/1/18 1,155,000 $1,140,081
Exterran Partners LP, 6.0%, 10/1/22 (144A) 5,175,000 $4,450,500
Exterran Partners LP, 6.0%, 4/1/21 2,750,000 $2,406,250
Ferrellgas LP, 6.5%, 5/1/21 1,850,000 $1,843,063
Ferrellgas LP, 6.75%, 1/15/22 3,585,000 $3,506,130
Fidelity & Guaranty Life Holdings, Inc., 6.375%, 4/1/21 (144A) 5,400,000 $5,852,250
Fieldwood Energy LLC, Closing Date Loan (Second Lien), 9/30/20 5,168,665 $3,168,392
Fifth Third Bancorp, Floating Rate Note (Perpetual) 60,650 $1,672,121
Flextronics International, Ltd., 4.625%, 2/15/20 1,380,000 $1,461,180
Florida East Coast Holdings Corp., 6.75%, 5/1/19 (144A) 4,250,000 $4,268,594
Fly Leasing, Ltd., 6.375%, 10/15/21 5,000,000 $5,004,479
Ford Motor Co. 704,311 $10,360,415
Forest City Enterprises, Inc. 291,692 $7,146,454
Forest City Enterprises, Inc., 3.625%, 8/15/20 4,885,000 $5,586,439
Freeport-McMoRan, Inc. 264,669 $4,449,086
Frontier Communications Corp., 7.125%, 1/15/23 4,750,000 $4,943,167
Frontier Communications Corp., 8.5%, 4/15/20 9,705,000 $11,161,020
Frontier Communications Corp., 8.75%, 4/15/22 3,100,000 $3,598,368
Fts International Inc 1st Lien Term L + 4.75% 01apr21 0 $0
Gannett Co, Inc., 6.375%, 10/15/23 6,170,000 $6,686,866
General Cable Corp. 667,230 $7,633,111
General Cable Corp., 4.5%, 11/15/29 (Step) 10,874,000 $6,974,312
Gentiva Health Services, Inc., 11.5%, 9/1/18 684,000 $757,815
Gentiva Health Services, Inc., Initial Term B Loan, 10/10/19 7,377,411 $7,385,481
Gibraltar Industries, Inc., 6.25%, 2/1/21 2,750,000 $2,890,938
Global Mortgage Securitization, Ltd., 5.25%, 11/25/32 (144A) 3,319,000 $810,512
GLP Capital LP, 4.375%, 11/1/18 2,075,000 $2,149,570
GLP Capital LP, 4.875%, 11/1/20 3,250,000 $3,387,109
GMAC Capital Trust I, Floating Rate Note, 2/15/40 358,975 $9,441,043
GMAT 2013-1 Trust, Floating Rate Note, 8/25/53 2,513,900 $2,394,118
Gulfport Energy Corp., 7.75%, 11/1/20 5,600,000 $5,666,500
Gulfport Energy Corp., 7.75%, 11/1/20 (144A) 2,015,000 $2,038,928
Halcon Resources Corp., 0.0% (Perpetual) 715 $190,101
Halcon Resources Corp., 8.875%, 5/15/21 7,255,000 $4,960,505
Halcon Resources Corp., 9.25%, 2/15/22 3,225,000 $2,266,055
Hexion US Finance Corp., 8.875%, 2/1/18 2,756,000 $2,485,568
Hexion US Finance Corp., 9.0%, 11/15/20 2,445,000 $1,709,055
Homeowner Assistance Program Reverse Mortgage Loan Trust 2013-RM1, 4.0%, 5/26/53 (144A) 1,400,000 $950,657
Horizon Lines, Inc. 4,099,666 $2,582,790
IAMGOLD Corp., 6.75%, 10/1/20 (144A) 6,445,000 $5,301,013
Iap Worldwide Services Inc 53 $40,556
Iap Worldwide Services Inc 2nd Lien Tl L + 6.5% 18jul19 421,999 $375,579
Insulet Corp., 2.0%, 6/15/19 4,450,000 $4,373,326
International Equipment Solutions LLC, Initial Loan, 8/16/19 2,838,884 $2,842,433
Intrepid Aviation Group Holdings LLC, 6.875%, 2/15/19 (144A) 2,950,000 $2,962,394
j2 Global, Inc., 8.0%, 8/1/20 6,085,000 $6,815,200
Jack Cooper Holdings Corp., 9.25%, 6/1/20 (144A) 1,990,000 $2,085,354
James River Coal Co., 7.875%, 4/1/19 4,170,000 $443,063
Jarden Corp., 1.125%, 3/15/34 (144A) 5,470,000 $6,282,979
Jazz Investments I, Ltd., 1.875%, 8/15/21 (144A) 2,050,000 $2,397,219
JB Poindexter & Co, Inc., 9.0%, 4/1/22 (144A) 4,030,000 $4,453,150
JLL, 7.5%, 2/1/22 (144A) 5,610,000 $5,890,500
JMC Steel Group, Inc., 8.25%, 3/15/18 (144A) 2,855,000 $2,451,493
Jonah Energy Llc 2nd Lien Tl L + 6.5% 08may21 3,863,910 $3,248,099
Joy Global, Inc. 109,200 $4,579,848
JP Morgan Chase Commercial Mortgage Securities Trust 2014-INN, Floating Rate Note, 6/15/29 (144A) 4,270,000 $4,283,373
Kane Flt% 12jun15 3,040,000 $2,913,536
Kane Flt% 14jul15 1,018,720 $993,761
Kane Flt% 30jul16 1,450,000 $1,581,515
Kane Ilw Zero% 02feb16 1,500,000 $1,381,200
Kane- Pi3 Zero% 18jul16 4,010,500 $4,525,448
Kane Sac, Ltd., 0.0%, 1/7/16 (Cat Bond) 1,514,150 $1,514,604
Kane Sac, Ltd., 0.0%, 1/7/16 (Cat Bond) 1,261,500 $1,262,383
Kane Sac, Ltd., 0.0%, 1/7/16 (Cat Bond) 1,467,400 $1,468,134
Kane Sac, Ltd., 0.0%, 1/7/16 (Cat Bond) 3,014,550 $3,017,565
Kane Zero% 15jan16 506,000 $506,759
Kane Zero% 19feb16 3,600,000 $3,655,440
Kane Zero% 22jan16 3,000,000 $3,015,900
Kane Zero% 22jan16 1,000,000 $1,007,600
Kane Zero% 22jan17 6,200,000 $6,311,600
KB Home, 1.375%, 2/1/19 11,400,000 $10,680,375
KB Home, 7.0%, 12/15/21 8,375,000 $8,449,910
KeHE Distributors LLC, 7.625%, 8/15/21 (144A) 3,635,000 $3,980,906
Kennametal, Inc. 139,920 $4,396,286
Kennedy-Wilson, Inc., 5.875%, 4/1/24 1,480,000 $1,526,447
Key Energy Services, Inc., 6.75%, 3/1/21 1,545,000 $970,453
Kilimanjaro Re, Ltd., Floating Rate Note, 11/25/19 (Cat Bond) (144A) 1,000,000 $1,001,825
Kindred Healthcare Inc Bridge L + 6% 09oct15 6,700,000 $6,700,000
Kinetic Concepts, Inc., Dollar Term E-1 Loan, 5/4/18 2,391,823 $2,369,612
Kodiak Oil & Gas Corp., 5.5%, 1/15/21 1,400,000 $1,417,422
Kodiak Oil & Gas Corp., 5.5%, 2/1/22 3,000,000 $3,112,500
Kodiak Oil & Gas Corp., 8.125%, 12/1/19 5,200,000 $5,361,417
Lantheus Medical Imaging, Inc., 9.75%, 5/15/17 7,459,000 $7,239,581
Legacy Reserves LP, 6.625%, 12/1/21 2,300,000 $1,819,396
Legacy Reserves LP, 6.625%, 12/1/21 (144A) 4,900,000 $3,876,104
Lennar Corp., 2.75%, 12/15/20 (144A) 3,015,000 $6,121,623
Lennar Corp., 4.5%, 6/15/19 4,150,000 $4,215,363
Lennar Corp., 4.75%, 11/15/22 8,730,000 $8,765,163
Liberty Media Corp., 1.375%, 10/15/23 4,425,000 $4,307,399
Liberty Tire Recycling LLC, 11.0%, 10/1/16 (144A) 2,400,000 $2,008,000
Lightstream Resources, Ltd., 8.625%, 2/1/20 (144A) 3,075,000 $1,877,672
Linn Energy LLC, 6.25%, 11/1/19 12,635,000 $9,831,609
Live Nation Entertainment, Inc., 7.0%, 9/1/20 (144A) 2,350,000 $2,577,167
LORENZO RE, Ltd., 0.0%, 12/31/49 (Cat Bond) (Perpetual) 33,500 $3,839,100
LyondellBasell Industries NV 77,355 $6,118,007
Marathon Oil Corp. 147,800 $3,931,480
Marathon Petroleum Corp. 73,900 $6,842,401
Mashantucket Western Pequot Tribe, 6.5%, 7/1/36 (PIK) 429,211 $11,523
MDC Partners, Inc., 6.75%, 4/1/20 (144A) 5,360,000 $5,715,100
MedAssets, Inc., 8.0%, 11/15/18 1,400,000 $1,477,894
Memorial Production Partners LP, 7.625%, 5/1/21 4,480,000 $4,106,200
Mentor Graphics Corp., 4.0%, 4/1/31 5,815,000 $7,117,318
Meritage Homes Corp., 7.0%, 4/1/22 3,660,000 $3,946,700
Micron Technology, Inc., 5.25%, 8/1/23 (144A) 5,265,000 $5,268,291
Micron Technology, Inc., 5.875%, 2/15/22 (144A) 1,825,000 $1,965,690
Midstates Petroleum Co, Inc., 10.75%, 10/1/20 4,155,000 $2,413,363
Midstates Petroleum Co, Inc., 9.25%, 6/1/21 2,800,000 $1,492,167
Midwest Vanadium Pty, Ltd., 11.5%, 2/15/18 (144A) 8,775,000 $2,842,978
MMM Holdings, Inc., MMM Term Loan, 12/12/17 768,218 $745,172
Monitronics International, Inc., 9.125%, 4/1/20 2,400,000 $2,305,000
Monitronics International, Inc., Term B Loan (2013), 3/23/18 5,947,674 $5,930,324
Morgan Stanley, Floating Rate Note (Perpetual) 189,000 $5,282,550
MPL 2 Acquisition Canco, Inc., 9.875%, 8/15/18 (144A) 1,675,000 $1,860,146
MSO of Puerto Rico, Inc., MSO Term Loan, 12/12/17 558,503 $552,918
Mystic Re, Ltd., Floating Rate Note, 3/12/15 (Cat Bond) (144A) 2,400,000 $2,521,440
NANA Development Corp., 9.5%, 3/15/19 (144A) 1,800,000 $1,648,600
National Mentor Holdings, Inc., Tranche B Term Loan, 1/31/21 2,570,575 $2,538,443
National Surgical Hospitals, Inc., Tranche B-2 Term Loan, 7/11/19 1,505,995 $1,498,465
Nationstar Mortgage LLC, 6.5%, 6/1/22 1,515,000 $1,319,313
Nationstar Mortgage LLC, 6.5%, 7/1/21 10,350,000 $9,008,813
Nationstar Mortgage LLC, 6.5%, 8/1/18 1,820,000 $1,747,200
Navistar International Corp., 8.25%, 11/1/21 4,850,000 $4,834,844
NCL Corp, Ltd., 5.25%, 11/15/19 (144A) 2,750,000 $2,813,250
NCR Corp. 171,011 $4,343,679
Neiman Marcus Group, Ltd. LLC, Other Term Loan, 10/25/20 0 $0
NeuStar, Inc., 4.5%, 1/15/23 5,048,000 $4,427,096
Northern Oil and Gas, Inc., 8.0%, 6/1/20 1,430,000 $1,256,017
NRG Energy, Inc., 6.25%, 5/1/24 (144A) 1,450,000 $1,469,031
NRG Energy, Inc., 7.625%, 1/15/18 4,700,000 $5,144,803
Nuance Communications, Inc., 2.75%, 11/1/31 10,992,000 $10,923,300
Numericable-SFR, 6.0%, 5/15/22 (144A) 1,575,000 $1,654,643
NuStar Logistics LP, Floating Rate Note, 1/15/43 113,853 $2,965,871
Oasis Petroleum, Inc., 6.5%, 11/1/21 2,820,000 $2,619,075
Offshore Group Investment, Ltd., 7.5%, 11/1/19 1,690,000 $1,130,188
Offshore Group Investment, Ltd., Second Term Loan, 3/28/19 2,308,875 $1,471,908
ON Semiconductor Corp., 2.625%, 12/15/26 4,239,000 $4,973,767
Orbital Sciences Corp. 104,284 $2,929,338
Outerwall, Inc., 5.875%, 6/15/21 (144A) 4,010,000 $3,759,403
Oxford Finance LLC, 7.25%, 1/15/18 (144A) 3,100,000 $3,222,364
Packaging Dynamics Corp., 8.75%, 2/1/16 (144A) 1,532,000 $1,599,025
Pangaea Zero% 01jul18 5,120,000 $5,493,760
Parker Drilling Co., 7.5%, 8/1/20 2,995,000 $2,418,463
PC Nextco Holdings LLC, 8.75%, 8/15/19 2,805,000 $2,960,249
PDC Energy, Inc., 7.75%, 10/15/22 4,960,000 $4,899,584
PDL BioPharma, Inc., 4.0%, 2/1/18 4,538,000 $4,416,041
Penn Virginia Corp., 6.0% (Perpetual) (144A) 20,400 $1,201,050
Penn Virginia Corp., 7.25%, 4/15/19 2,860,000 $2,420,553
Penn Virginia Corp., 8.5%, 5/1/20 7,480,000 $6,367,350
PetroQuest Energy, Inc., 6.875% (Perpetual) 59,180 $1,808,689
Pittsburgh Glass Works LLC, 8.0%, 11/15/18 (144A) 1,440,000 $1,550,720
Polymet Mining Corp. 663,136 $696,293
Post Holdings, Inc., 2.5% (Perpetual) (144A) 73,300 $6,798,575
Post Holdings, Inc., 6.0%, 12/15/22 (144A) 2,300,000 $2,214,133
Post Holdings, Inc., 6.75%, 12/1/21 (144A) 1,775,000 $1,755,031
PPL Capital Funding, Inc., 5.9%, 4/30/73 214,000 $5,457,000
Prince Mineral Holding Corp., 12.0%, 12/15/19 (144A) 1,595,000 $1,652,376
Quebecor Media, Inc., 5.75%, 1/15/23 5,975,000 $6,198,150
Queen Street IV Capital, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 2,000,000 $2,027,283
Queen Street VI Re, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 250,000 $254,922
Queen Street V Re, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 1,150,000 $1,168,953
Rain CII Carbon LLC, 8.0%, 12/1/18 (144A) 1,750,000 $1,747,083
Regal Entertainment Group, 5.75%, 2/1/25 4,895,000 $4,833,813
Regal Entertainment Group, 5.75%, 3/15/22 425,000 $431,576
Rent-A-Center, Inc., 6.625%, 11/15/20 2,590,000 $2,522,624
Residential Reinsurance 2011, Ltd., Floating Rate Note, 12/6/16 (Cat Bond) (144A) 800,000 $825,654
Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 1,750,000 $2,065,719
Residential Reinsurance 2013, Ltd., Floating Rate Note, 12/6/19 (Cat Bond) (144A) 250,000 $262,492
Resolute Forest Products, Inc., 5.875%, 5/15/23 3,845,000 $3,719,664
Revlon Consumer Products Corp., 5.75%, 2/15/21 2,495,000 $2,617,290
Rexel SA, 5.25%, 6/15/20 (144A) 5,200,000 $5,319,383
Reynolds Group Issuer, Inc., 8.25%, 2/15/21 3,700,000 $3,900,879
Reynolds Group Issuer, Inc., 8.5%, 5/15/18 7,495,000 $7,779,394
Reynolds Group Issuer, Inc., 9.875%, 8/15/19 4,565,000 $5,058,179
Rialto Holdings LLC, 7.0%, 12/1/18 (144A) 1,800,000 $1,848,000
Rice Energy, Inc., 6.25%, 5/1/22 3,295,000 $3,231,159
Rosetta Resources, Inc., 5.875%, 6/1/22 8,170,000 $7,759,798
RTI International Metals, Inc., 1.625%, 10/15/19 3,805,000 $3,530,697
Sabine Pass Liquefaction LLC, 5.625%, 2/1/21 6,775,000 $6,974,016
Safway Group Holding LLC, 7.0%, 5/15/18 (144A) 2,000,000 $1,975,156
Salix Pharmaceuticals, Ltd., 1.5%, 3/15/19 3,720,000 $7,837,730
Sanchez Energy Corp., 6.125%, 1/15/23 (144A) 1,300,000 $1,154,039
Sanchez Energy Corp., 7.75%, 6/15/21 3,775,000 $3,699,133
SandRidge Energy, Inc., 7.0% (Perpetual) 33,162 $1,372,078
Scientific Games International, Inc., 10.0%, 12/1/22 (144A) 11,000,000 $10,306,389
Scientific Games International, Inc., 6.25%, 9/1/20 700,000 $508,229
SEACOR Holdings, Inc., 3.0%, 11/15/28 2,170,000 $1,988,450
Seagate HDD Cayman, 4.75%, 1/1/25 (144A) 5,900,000 $6,265,118
Seagate HDD Cayman, 4.75%, 6/1/23 4,300,000 $4,621,596
Sealy Corp., 8.0%, 7/15/16 (PIK) 143,000 $12,143,560
Sector Re V, Ltd., 0.0%, 12/1/18 (Cat Bond) (144A) 12,321 $520,083
Sector Re V, Ltd., 0.0%, 12/1/19 (Cat Bond) (144A) 1,100,000 $1,113,750
Sector Re V, Ltd., 0.0%, 3/1/18 (Cat Bond) (144A) 3,587 $91,374
Sector Re V, Ltd., 0.0%, 3/30/19 (Cat Bond) (144A) 1,250,000 $1,476,625
ServiceNow, Inc., 0.0%, 11/1/18 2,235,000 $2,662,444
Ship Midco, Ltd., Facility B2A-II, 11/29/19 2,469,527 $2,468,060
Shutterfly, Inc., 0.25%, 5/15/18 7,455,000 $7,174,713
Silverton RE, Ltd., 0.0%, 9/16/16 (Cat Bond) (144A) 2,000,000 $275,400
Silverton RE, Ltd., 0.0%, 9/18/17 (Cat Bond) (144A) 2,000,000 $2,034,400
SolarCity Corp., 1.625%, 11/1/19 (144A) 4,825,000 $4,206,009
Southern States Cooperative, Inc., 10.0%, 8/15/21 (144A) 4,460,000 $4,375,756
Springleaf Mortgage Loan Trust 2013-1, Floating Rate Note, 6/25/58 (144A) 400,000 $414,838
Sprint Corp., 7.25%, 9/15/21 3,645,000 $3,739,365
Standard Aero, Ltd., Replacement Tranche B-2 Loan, 11/2/18 859,056 $858,340
Standard Pacific Corp., 6.25%, 12/15/21 6,975,000 $7,170,203
Starbucks Corp. 54,390 $4,760,757
Stone Energy Corp., 7.5%, 11/15/22 1,945,000 $1,722,946
SunCoke Energy Partners LP, 7.375%, 2/1/20 (144A) 2,250,000 $2,400,469
Swift Energy Co., 7.875%, 3/1/22 10,270,000 $3,957,159
syncreon Group BV, 8.625%, 11/1/21 (144A) 3,500,000 $3,207,969
Talos Production LLC, 9.75%, 2/15/18 (144A) 3,000,000 $2,714,875
Targa Resources Partners LP, 4.25%, 11/15/23 4,685,000 $4,422,510
TE Connectivity, Ltd. 54,309 $3,605,575
Tesoro Corp., 5.375%, 10/1/22 4,695,000 $4,896,494
The Geo Group, Inc., 5.875%, 10/15/24 4,405,000 $4,627,728
The KEYW Holding Corp., 2.5%, 7/15/19 2,150,000 $1,850,045
The Medicines Co., 2.5%, 1/15/22 (144A) 2,625,000 $2,839,725
Theravance, Inc., 2.125%, 1/15/23 9,215,000 $6,407,369
Thermo Fisher Scientific, Inc. 72,794 $9,114,537
The Ryland Group, Inc., 5.375%, 10/1/22 2,540,000 $2,509,308
TI Group Automotive Systems LLC, Term Loan Facility, 7/1/21 3,003,595 $2,994,678
T-Mobile USA, Inc., 6.5%, 1/15/24 1,200,000 $1,248,467
T-Mobile USA, Inc., 6.542%, 4/28/20 4,300,000 $4,456,886
T-Mobile USA, Inc., 6.633%, 4/28/21 2,865,000 $2,976,170
T-Mobile USA, Inc., 6.731%, 4/28/22 2,000,000 $2,073,622
TMS International Corp., 7.625%, 10/15/21 (144A) 2,165,000 $2,202,782
TMX Finance LLC, 8.5%, 9/15/18 (144A) 3,265,000 $2,586,243
Tower Automotive Holdings USA LLC, Refinancing Term Loan, 4/23/20 8,469,903 $8,358,736
Tronox Finance LLC, 6.375%, 8/15/20 5,195,000 $5,295,761
Twitter, Inc., 0.25%, 9/15/19 (144A) 2,055,000 $1,852,697
U.S. Treasury Floating Rate Note, 0.090001011%, 7/31/16 5,000,000 $5,001,169
United Continental Holdings, Inc. 103,547 $7,183,055
United Continental Holdings, Inc., 6.0%, 7/15/26 3,200,000 $3,116,533
United States Treasury Floating Rate Note, Floating Rate Note, 1/31/16 5,000,000 $5,000,252
United States Treasury Floating Rate Note, Floating Rate Note, 10/31/16 5,000,000 $4,998,657
United States Treasury Floating Rate Note, Floating Rate Note, 4/30/16 5,000,000 $5,001,112
Universal Hospital Services, Inc., 7.625%, 8/15/20 1,265,000 $1,151,352
Univision Communications, Inc., 6.875%, 5/15/19 (144A) 6,035,000 $6,379,079
Univision Communications, Inc., Replacement First-Lien Term Loan, 3/1/20 1,413,808 $1,394,589
Vanguard Natural Resources LLC, 7.875%, 4/1/20 3,200,000 $2,868,000
Vericrest Opportunity Loan Transferee 2014-NPL4 LLC, 4.0%, 4/27/54 (Step) (144A) 1,000,000 $985,003
Vers 2015-A Zero% 31dec17 4,400,000 $4,434,320
Vertafore, Inc., Term Loan (2013), 10/3/19 668,841 $665,497
ViaSat, Inc., 6.875%, 6/15/20 3,000,000 $3,150,104
Viasystems, Inc., 7.875%, 5/1/19 (144A) 5,300,000 $5,702,469
Videotron, Ltd., 5.375%, 6/15/24 (144A) 9,050,000 $9,338,406
Viking Cruises, Ltd., 8.5%, 10/15/22 (144A) 4,290,000 $4,804,919
Virgin Media Investment Holdings, Ltd., B Facility, 6/8/20 7,575,000 $7,473,806
Virtual Radiologic Corp., Term Loan A, 12/22/16 1,104,588 $883,670
Vishay Intertechnology, Inc., 2.25%, 5/15/41 (144A) 3,755,000 $3,211,933
Voya Financial, Inc., Floating Rate Note, 5/15/53 4,200,000 $4,271,097
Waters Corp. 11,356 $1,351,932
WCA Waste Corp., Term Loan, 3/23/18 617,538 $609,818
WCP ISSUER LLC, 6.657%, 8/15/43 (144A) 3,350,000 $3,509,826
WebMD Health Corp., 1.5%, 12/1/20 5,145,000 $5,148,766
WebMD Health Corp., 2.5%, 1/31/18 6,420,000 $6,432,483
WellCare Health Plans, Inc., 5.75%, 11/15/20 5,370,000 $5,636,561
Wells Fargo & Co., 7.5% (Perpetual) 2,000 $2,486,000
Wells Fargo & Co., Floating Rate Note (Perpetual) 3,675,000 $3,845,173
WESCO Distribution, Inc., 5.375%, 12/15/21 5,145,000 $5,218,924
Westgate Resorts 2012-A LLC, 3.75%, 8/20/25 (144A) 700,000 $364,096
Windstream Corp., 6.375%, 8/1/23 4,975,000 $4,741,797
Windstream Corp., 7.5%, 6/1/22 8,830,000 $8,918,300
Windstream Corp., 7.75%, 10/15/20 3,460,000 $3,668,705
Windstream Holdings, Inc. 585,800 $4,657,110
WMG Acquisition Corp., 6.75%, 4/15/22 (144A) 2,665,000 $2,454,798
Xerium Technologies, Inc., 8.875%, 6/15/18 2,660,000 $2,809,865

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

For fund descriptions, historical and current performance, standardized returns as of the most recent quarter-end, risk disclosure or a prospectus, please click here.

Please request a free information kit on any Pioneer fund by ordering from this web site or by calling 1-800-225-6292. The kit includes a quarterly fact sheet and a prospectus. You should consider a fund's investment objectives, risks, charges and expenses carefully before investing. The prospectus contains this and other information about each fund and should be read carefully before you invest or send money. To obtain a prospectus directly and for other information on any Pioneer fund please visit our download literature page.