nq2.htm



 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY
 
Investment Company Act file number 811-06548
 
Nuveen Select Tax-Free Income Portfolio
(Exact name of registrant as specified in charter)
 
Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)
 

Kevin J. McCarthy
Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)
 
Registrant's telephone number, including area code:         312-917-7700        
 
Date of fiscal year end:            3/31          
 
Date of reporting period:         12/31/14         
 
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 the 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 the 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. § 3507.

 
 
 

 
 
Item 1. Schedule of Investments
 
           
   
Portfolio of Investments
     
           
   
Nuveen Select Tax-Free Income Portfolio (NXP)
     
   
December 31, 2014 (Unaudited)
     
 
 
Principal
   
Optional Call
   
Amount (000)
 
Description (1)
Provisions (2)
Ratings (3)
Value
   
LONG-TERM INVESTMENTS – 98.5%
     
           
   
MUNICIPAL BONDS – 98.5%
     
           
   
Alaska – 0.9%
     
$ 2,675
 
Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds,
3/15 at 100.00
B2
$ 2,165,974
   
Series 2006A, 5.000%, 6/01/46
     
   
Arizona – 1.4%
     
2,500
 
Arizona Health Facilities Authority, Hospital Revenue Bonds, Catholic Healthcare West, Series
3/21 at 100.00
A
2,772,825
   
2011B-1&2, 5.250%, 3/01/39
     
625
 
Pima County Industrial Development Authority, Arizona, Revenue Bonds, Tucson Electric Power
10/20 at 100.00
BBB+
691,425
   
Company, Series 2010A, 5.250%, 10/01/40
     
3,125
 
Total Arizona
   
3,464,250
   
Arkansas – 0.7%
     
6,555
 
Arkansas Development Finance Authority, Tobacco Settlement Revenue Bonds, Arkansas Cancer
No Opt. Call
Aa2
1,645,698
   
Research Center Project, Series 2006, 0.000%, 7/01/46 – AMBAC Insured
     
   
California – 15.3%
     
2,000
 
Alameda Corridor Transportation Authority, California, Revenue Bonds, Refunding Subordinate
10/17 at 100.00
BBB+
2,151,360
   
Lien Series 2004A, 5.450%, 10/01/25 – AMBAC Insured
     
4,195
 
Anaheim City School District, Orange County, California, General Obligation Bonds, Election
No Opt. Call
AA
2,145,533
   
2002 Series 2007, 0.000%, 8/01/31 – AGM Insured
     
2,340
 
Anaheim Public Financing Authority, California, Subordinate Lease Revenue Bonds, Public
No Opt. Call
AA
1,207,112
   
Improvement Project, Series 1997C, 0.000%, 9/01/30 – AGM Insured
     
3,000
 
Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Series
4/23 at 100.00
A+
3,422,550
   
2013S-4, 5.000%, 4/01/38
     
2,310
 
California Health Facilities Financing Authority, Revenue Bonds, Saint Joseph Health System,
7/23 at 100.00
AA–
2,670,314
   
Series 2013A, 5.000%, 7/01/33
     
1,630
 
California State Public Works Board, Lease Revenue Bonds, Various Capital Projects, Series
11/23 at 100.00
A1
1,856,162
   
2013I, 5.000%, 11/01/38
     
895
 
California Statewide Community Development Authority, Revenue Bonds, Methodist Hospital
8/19 at 100.00
Aa2
1,077,133
   
Project, Series 2009, 6.750%, 2/01/38
     
3,790
 
Coast Community College District, Orange County, California, General Obligation Bonds, Series
8/16 at 33.78
Aa1
1,220,607
   
2006C, 0.000%, 8/01/36 – AGM Insured
     
2,645
 
Cypress Elementary School District, Orange County, California, General Obligation Bonds,
No Opt. Call
AA
1,139,149
   
Series 2009A, 0.000%, 5/01/34 – AGM Insured
     
2,640
 
Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement
No Opt. Call
A1
1,666,183
   
Asset-Backed Revenue Bonds, Series 2005A, 0.000%, 6/01/28 – AMBAC Insured
     
1,395
 
Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed
6/17 at 100.00
B
1,324,804
   
Bonds, Series 2007A-1, 4.500%, 6/01/27
     
2,350
 
Golden Valley Unified School District, Madera County, California, General Obligation Bonds,
8/17 at 56.07
AA
1,183,178
   
Election 2006 Series 2007A, 0.000%, 8/01/29 – AGM Insured
     
3,030
 
Grossmont Union High School District, San Diego County, California, General Obligation Bonds,
No Opt. Call
Aa3
2,217,506
   
Series 2006, 0.000%, 8/01/25 – NPFG Insured
     
1,000
 
Moreno Valley Unified School District, Riverside County, California, General Obligation Bonds,
No Opt. Call
AA–
781,370
   
Series 2007, 0.000%, 8/01/23 – NPFG Insured
     
1,160
 
Mount San Antonio Community College District, Los Angeles County, California, General
8/35 at 100.00
AA
775,773
   
Obligation Bonds, Election of 2008, Series 2013A, 0.000%, 8/01/43
     
5,395
 
Napa Valley Community College District, Napa and Sonoma Counties, California, General
8/17 at 46.57
Aa2
2,294,170
   
Obligation Bonds, Election 2002 Series 2007C, 0.000%, 8/01/32 – NPFG Insured
     
2,180
 
New Haven Unified School District, Alameda County, California, General Obligation Bonds,
No Opt. Call
AA–
1,079,231
   
Series 2004A, 0.000%, 8/01/28 – NPFG Insured
     
590
 
Palomar Pomerado Health Care District, California, Certificates of Participation, Series 2009,
11/19 at 100.00
Ba1
641,065
   
6.750%, 11/01/39
     
4,390
 
Pittsburg Redevelopment Agency, California, Tax Allocation Bonds, Los Medanos Community
No Opt. Call
A
2,261,640
   
Development Project, Series 1999, 0.000%, 8/01/29 – AMBAC Insured
     
1,700
 
Placentia-Yorba Linda Unified School District, Orange County, California, Certificates of
No Opt. Call
AA–
696,422
   
Participation, Series 2006, 0.000%, 10/01/34 – FGIC Insured
     
8,000
 
Poway Unified School District, San Diego County, California, General Obligation Bonds, School
No Opt. Call
Aa2
3,715,360
   
Facilities Improvement District 2007-1, Series 2009A, 0.000%, 8/01/33
     
2,110
 
Sierra Sands Unified School District, Kern County, California, General Obligation Bonds,
No Opt. Call
AA
1,270,663
   
Election of 2006, Series 2006A, 0.000%, 11/01/28 – FGIC Insured
     
1,195
 
Tobacco Securitization Authority of Northern California, Tobacco Settlement Asset-Backed
6/15 at 100.00
B–
946,440
   
Bonds, Series 2005A-1, 5.500%, 6/01/45
     
1,150
 
Woodside Elementary School District, San Mateo County, California, General Obligation Bonds,
No Opt. Call
AAA
639,941
   
Series 2007, 0.000%, 10/01/30 – AMBAC Insured
     
61,090
 
Total California
   
38,383,666
   
Colorado – 4.1%
     
1,780
 
Colorado Health Facilities Authority, Colorado, Revenue Bonds, Catholic Health Initiatives,
1/23 at 100.00
A1
2,012,949
   
Series 2013A, 5.250%, 1/01/45
     
1,000
 
Colorado Health Facilities Authority, Colorado, Revenue Bonds, Sisters of Charity of
1/20 at 100.00
AA–
1,106,160
   
Leavenworth Health Services Corporation, Series 2010A, 5.000%, 1/01/40
     
1,935
 
Denver City and County, Colorado, Airport System Revenue Bonds, Subordinate Lien Series 2013B,
11/23 at 100.00
A
2,175,849
   
5.000%, 11/15/43
     
160
 
E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%,
No Opt. Call
AA–
94,810
   
9/01/29 – NPFG Insured
     
2,000
 
E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, Series 2004B, 0.000%, 9/01/32 –
9/20 at 50.83
AA–
796,080
   
NPFG Insured
     
12,500
 
E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, Series 2006A, 0.000%, 9/01/38 –
9/26 at 54.77
AA–
4,013,750
   
NPFG Insured
     
19,375
 
Total Colorado
   
10,199,598
   
Florida – 1.7%
     
1,225
 
Florida Citizens Property Insurance Corporation, High Risk Account Revenue Bonds, Series
No Opt. Call
AA–
1,234,923
   
2007A, 5.000%, 3/01/15 – NPFG Insured
     
2,000
 
Halifax Hospital Medical Center, Florida, Revenue Bonds, Series 2006, 5.375%, 6/01/46
6/16 at 100.00
BBB+
2,089,020
1,000
 
Miami-Dade County, Florida, General Obligation Bonds, Build Better Communities Program, Series
7/15 at 100.00
AA
1,023,360
   
2005, 5.000%, 7/01/24 – NPFG Insured
     
4,225
 
Total Florida
   
4,347,303
   
Georgia – 0.3%
     
2,000
 
Franklin County Industrial Building Authority, Georgia, Revenue Bonds, Ty Cobb Regional
12/20 at 100.00
N/R
749,093
   
Medical Center Project, Series 2010, 8.125%, 12/01/45 (5), (6)
     
   
Illinois – 8.4%
     
   
Board of Trustees of Southern Illinois University, Housing and Auxiliary Facilities System
     
   
Revenue Bonds, Series 1999A:
     
2,465
 
0.000%, 4/01/20 – NPFG Insured
No Opt. Call
AA–
2,086,573
2,000
 
0.000%, 4/01/23 – NPFG Insured
No Opt. Call
AA–
1,475,920
735
 
Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues Series
12/21 at 100.00
A+
751,567
   
2011A, 5.000%, 12/01/41
     
1,050
 
Illinois Finance Authority, Revenue Bonds, Loyola University of Chicago, Tender Option Bond
No Opt. Call
AA+
1,211,983
   
Trust 1137, 9.272%, 7/01/15 (IF)
     
260
 
Illinois Finance Authority, Revenue Bonds, Rehabilitation Institute of Chicago, Series 2013A,
7/23 at 100.00
A–
305,971
   
6.000%, 7/01/43
     
1,000
 
Illinois Finance Authority, Revenue Bonds, Silver Cross Hospital and Medical Centers, Series
8/19 at 100.00
BBB+
1,172,170
   
2009, 6.875%, 8/15/38
     
2,100
 
Illinois Finance Authority, Revenue Refunding Bonds, Silver Cross Hospital and Medical
8/18 at 100.00
BBB+
2,311,071
   
Centers, Series 2008A, 5.500%, 8/15/30
     
2,190
 
Illinois State, General Obligation Bonds, Refunding Series 2012, 5.000%, 8/01/23
No Opt. Call
A–
2,474,722
1,000
 
Kendall, Kane, and Will Counties Community Unit School District 308 Oswego, Illinois, General
No Opt. Call
Aa2
741,930
   
Obligation Bonds, Series 2008, 0.000%, 2/01/24 – AGM Insured
     
1,990
 
Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion
No Opt. Call
AA–
1,923,017
   
Project, Series 1993A, 0.010%, 6/15/17 – FGIC Insured
     
   
Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion
     
   
Project, Series 2002A:
     
1,720
 
0.000%, 12/15/29 – NPFG Insured
No Opt. Call
AAA
940,152
810
 
0.000%, 6/15/30 – NPFG Insured
No Opt. Call
AAA
426,724
6,070
 
0.000%, 12/15/31 – NPFG Insured
No Opt. Call
AAA
2,980,127
5,000
 
0.000%, 12/15/36 – NPFG Insured
No Opt. Call
AAA
1,850,050
310
 
University of Illinois, Health Services Facilities System Revenue Bonds, Series 2013,
10/23 at 100.00
A
359,594
   
6.000%, 10/01/42
     
28,700
 
Total Illinois
   
21,011,571
   
Indiana – 1.0%
     
270
 
Indiana Finance Authority, Tax-Exempt Private Activity Revenue Bonds, I-69 Section 5 Project,
9/24 at 100.00
BBB
301,180
   
Series 2014, 5.250%, 9/01/34 (Alternative Minimum Tax)
     
345
 
Indiana Health Facility Financing Authority, Hospital Revenue Refunding Bonds, Columbus
No Opt. Call
AA
355,926
   
Regional Hospital, Series 1993, 7.000%, 8/15/15 – AGM Insured
     
1,000
 
Indiana Health Facility Financing Authority, Revenue Bonds, Community Foundation of Northwest
3/17 at 100.00
A
1,054,280
   
Indiana, Series 2007, 5.500%, 3/01/37
     
750
 
West Clark 2000 School Building Corporation, Clark County, Indiana, First Mortgage Bonds,
1/15 at 100.00
AA+
752,955
   
Series 2005, 5.000%, 7/15/22 – NPFG Insured
     
2,365
 
Total Indiana
   
2,464,341
   
Iowa – 2.4%
     
1,665
 
Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company
No Opt. Call
BB–
1,769,895
   
Project, Series 2013, 5.000%, 12/01/19
     
1,000
 
Iowa Tobacco Settlement Authority, Asset Backed Settlement Revenue Bonds, Series 2005C,
6/15 at 100.00
B+
841,440
   
5.375%, 6/01/38
     
4,000
 
Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B,
6/17 at 100.00
B+
3,673,920
   
5.600%, 6/01/34
     
6,665
 
Total Iowa
   
6,285,255
   
Kansas – 0.2%
     
500
 
Lawrence, Kansas, Hospital Revenue Bonds, Lawrence Memorial Hospital, Refunding Series 2006,
7/16 at 100.00
A1
509,670
   
4.875%, 7/01/36
     
   
Kentucky – 1.1%
     
2,500
 
Kentucky Economic Development Finance Authority, Hospital Revenue Bonds, Baptist Healthcare
8/21 at 100.00
A+
2,759,375
   
System Obligated Group, Series 2011, 5.250%, 8/15/46
     
   
Massachusetts – 1.0%
     
500
 
Massachusetts Health and Educational Facilities Authority, Revenue Bonds, CareGroup Inc.,
7/18 at 100.00
A–
537,990
   
Series 2008E-1 &2, 5.000%, 7/01/28
     
1,820
 
Massachusetts Housing Finance Agency, Housing Bonds, Series 2009F, 5.700%, 6/01/40
12/18 at 100.00
AA–
1,939,228
2,320
 
Total Massachusetts
   
2,477,218
   
Michigan – 3.9%
     
355
 
Detroit Water and Sewerage Department, Michigan, Sewage Disposal System Revenue Bonds,
7/22 at 100.00
BBB+
384,344
   
Refunding Senior Lien Series 2012A, 5.250%, 7/01/39
     
1,500
 
Detroit, Michigan, Sewer Disposal System Revenue Bonds, Second Lien, Series 2001E, 5.750%,
7/18 at 100.00
AA+
1,676,565
   
7/01/31 – BHAC Insured
     
2,500
 
Detroit, Michigan, Sewer Disposal System Revenue Bonds, Second Lien, Series 2006B, 5.000%,
7/16 at 100.00
AA–
2,573,725
   
7/01/33 – FGIC Insured
     
2,075
 
Detroit, Michigan, Water Supply System Senior Lien Revenue Bonds, Series 2004A, 4.500%,
7/16 at 100.00
AA–
2,095,688
   
7/01/25 – NPFG Insured
     
2,905
 
Wayne County Airport Authority, Michigan, Revenue Bonds, Detroit Metropolitan Wayne County
12/15 at 100.00
AA–
2,998,715
   
Airport, Series 2005, 5.000%, 12/01/34 – NPFG Insured (Alternative Minimum Tax)
     
9,335
 
Total Michigan
   
9,729,037
   
Minnesota – 6.0%
     
8,450
 
Minneapolis, Minnesota, General Obligation Bonds, Various Purpose Series 2014, 1.000%, 12/01/15
No Opt. Call
AAA
8,519,544
4,565
 
Minnesota State, General Fund Appropriation Refunding Bonds, Series 2012B, 4.000%, 3/01/15
No Opt. Call
AA
4,594,855
1,825
 
Minnesota State, General Obligation Bonds, Refunding Series 2005, 5.000%, 10/01/15
No Opt. Call
AA+
1,891,667
14,840
 
Total Minnesota
   
15,006,066
   
Missouri – 2.4%
     
360
 
Bi-State Development Agency of the Missouri-Illinois Metropolitan District, Mass Transit Sales
10/18 at 100.00
AA+
405,511
   
Tax Appropriation Bonds, Refunding Combined Lien Series 2013A, 5.000%, 10/01/28
     
   
Kansas City Municipal Assistance Corporation, Missouri, Leasehold Revenue Bonds,
     
   
Series 2004B-1:
     
1,165
 
0.000%, 4/15/23 – AMBAC Insured
No Opt. Call
AA
946,073
5,000
 
0.000%, 4/15/30 – AMBAC Insured
No Opt. Call
AA–
2,816,250
2,000
 
Missouri Health and Educational Facilities Authority, Health Facilities Revenue Bonds,
11/23 at 100.00
A2
2,215,780
   
CoxHealth, Series 2013A, 5.000%, 11/15/38
     
8,525
 
Total Missouri
   
6,383,614
   
Nevada – 2.4%
     
750
 
Clark County, Nevada, Airport Revenue Bonds, Tender Option Bond Trust Series 11823,
No Opt. Call
A+
1,271,070
   
20.365%, 1/01/18 (IF)
     
1,250
 
Clark County, Nevada, Passenger Facility Charge Revenue Bonds, Las Vegas-McCarran
1/20 at 100.00
A+
1,407,125
   
International Airport, Series 2010A, 5.250%, 7/01/42
     
1,500
 
Las Vegas Redevelopment Agency, Nevada, Tax Increment Revenue Bonds, Series 2009A,
6/19 at 100.00
BBB–
1,730,310
   
8.000%, 6/15/30
     
1,600
 
Las Vegas Valley Water District, Nevada, General Obligation Bonds, Series 2005A, 5.000%,
6/15 at 100.00
AA+
1,631,824
   
6/01/18 – FGIC Insured
     
5,100
 
Total Nevada
   
6,040,329
   
New Jersey – 7.8%
     
940
 
New Jersey Economic Development Authority, Private Activity Bonds, The Goethals Bridge
1/24 at 100.00
AA
1,038,258
   
Replacement Project, Series 2013, 5.125%, 1/01/39 – AGM Insured (Alternative Minimum Tax)
     
2,550
 
New Jersey Economic Development Authority, Revenue Bonds, Motor Vehicle Surcharge, Series
3/15 at 100.00
AA–
2,596,078
   
2004A, 5.250%, 7/01/33 – NPFG Insured
     
35,000
 
New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2006C,
No Opt. Call
AA
13,958,350
   
0.000%, 12/15/34 – AGM Insured
     
2,500
 
Tobacco Settlement Financing Corporation, New Jersey, Tobacco Settlement Asset-Backed Bonds,
6/17 at 100.00
B2
1,897,950
   
Series 2007-1A, 5.000%, 6/01/41
     
40,990
 
Total New Jersey
   
19,490,636
   
New Mexico – 3.2%
     
3,000
 
Albuquerque, New Mexico, General Obligation Bonds, General Purpose Series 2012A,
No Opt. Call
AAA
3,058,380
   
4.000%, 7/01/15
     
1,000
 
New Mexico Mortgage Finance Authority, Multifamily Housing Revenue Bonds, St Anthony, Series
9/17 at 100.00
N/R
1,017,830
   
2007A, 5.250%, 9/01/42 (Alternative Minimum Tax)
     
4,000
 
University of New Mexico, FHA-Insured Hospital Mortgage Revenue Bonds, University of Mexico
3/15 at 100.00
AA
4,006,520
   
Hospital Project, Series 2004, 4.625%, 7/01/25 – AGM Insured
     
8,000
 
Total New Mexico
   
8,082,730
   
New York – 3.7%
     
500
 
Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Senior Fiscal 2012 Series
2/21 at 100.00
A
559,195
   
2011A, 5.250%, 2/15/47
     
1,810
 
Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Series 2006A, 5.000%,
2/17 at 100.00
A
1,929,026
   
2/15/47 – FGIC Insured
     
2,500
 
New York City Transitional Finance Authority, New York, Future Tax Secured Bonds, Fiscal
5/17 at 100.00
AAA
2,716,625
   
Series 2007B, 4.750%, 11/01/27
     
3,000
 
New York City, New York, General Obligation Bonds, Fiscal 2013 Series J, 5.000%, 8/01/15
No Opt. Call
AA
3,084,840
780
 
Port Authority of New York and New Jersey, Special Project Bonds, JFK International Air
12/20 at 100.00
BBB
907,351
   
Terminal LLC Project, Eighth Series 2010, 6.000%, 12/01/42
     
8,590
 
Total New York
   
9,197,037
   
North Carolina – 0.5%
     
1,000
 
North Carolina Eastern Municipal Power Agency, Power System Revenue Bonds, Series 2008C,
1/19 at 100.00
A–
1,206,330
   
6.750%, 1/01/24
     
   
Ohio – 2.1%
     
   
Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue
     
   
Bonds, Senior Lien, Series 2007A-2:
     
1,670
 
6.000%, 6/01/42
6/17 at 100.00
B
1,374,610
1,000
 
6.500%, 6/01/47
6/17 at 100.00
B
889,280
1,975
 
Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue
6/22 at 100.00
B–
1,698,401
   
Bonds, Senior Lien, Series 2007A-3, 6.250%, 6/01/37
     
1,105
 
Ohio Turnpike Commission, Turnpike Revenue Bonds, Infrastructure Project, Junior Lien Series
2/23 at 100.00
A+
1,221,622
   
2013A-1, 5.000%, 2/15/48
     
5,750
 
Total Ohio
   
5,183,913
   
Oklahoma – 1.1%
     
1,000
 
Norman Regional Hospital Authority, Oklahoma, Hospital Revenue Bonds, Series 2005,
9/16 at 100.00
BBB–
1,034,160
   
5.375%, 9/01/36
     
1,650
 
Tulsa, Oklahoma, General Obligation Bonds, Series 2013, 4.000%, 3/01/15
No Opt. Call
Aa1
1,660,841
2,650
 
Total Oklahoma
   
2,695,001
   
Pennsylvania – 0.6%
     
1,490
 
Pennsylvania Turnpike Commission, Motor License Fund-Enhanced Subordinate Special Revenue
12/20 at 100.00
AA–
1,566,482
   
Bonds, Series 2010B, 0.000%, 12/01/30
     
   
Puerto Rico – 1.3%
     
   
Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Bonds, Series 2007A:
     
17,500
 
0.000%, 8/01/41 – NPFG Insured
No Opt. Call
AA–
3,175,025
1,000
 
0.000%, 8/01/43 – NPFG Insured
No Opt. Call
AA–
159,570
18,500
 
Total Puerto Rico
   
3,334,595
   
Rhode Island – 0.5%
     
1,125
 
Rhode Island Economic Development Corporation, Airport Revenue Bonds, Refunding Series 2005A,
7/15 at 100.00
AA–
1,129,523
   
4.625%, 7/01/26 – NPFG Insured (Alternative Minimum Tax)
     
   
South Carolina – 1.1%
     
2,710
 
Piedmont Municipal Power Agency, South Carolina, Electric Revenue Refunding Bonds, Series
No Opt. Call
A3
2,710,000
   
1991A, 6.500%, 1/01/15 – NPFG Insured
     
   
Texas – 10.3%
     
250
 
Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2011,
1/21 at 100.00
BBB
291,202
   
6.000%, 1/01/41
     
1,485
 
Cypress-Fairbanks Independent School District, Harris County, Texas, General Obligation Bonds,
2/15 at 100.00
AAA
1,493,405
   
Series 2005A, 4.750%, 2/15/23 (Pre-refunded 2/15/15)
     
5,565
 
Grand Parkway Transportation Corporation, Texas, System Toll Revenue Bonds, First Tier Series
10/23 at 100.00
BBB+
6,177,985
   
2013A, 5.500%, 4/01/53
     
3,415
 
Harris County-Houston Sports Authority, Texas, Revenue Bonds, Junior Lien Series 2001H,
No Opt. Call
AA–
1,641,249
   
0.000%, 11/15/30 – NPFG Insured
     
4,165
 
Harris County-Houston Sports Authority, Texas, Revenue Bonds, Third Lien Series 2004A-3,
11/24 at 52.47
AA–
1,372,159
   
0.000%, 11/15/35 – NPFG Insured
     
4,015
 
Harris County-Houston Sports Authority, Texas, Special Revenue Bonds, Refunding Senior Lien
11/30 at 61.17
AA
1,238,467
   
Series 2001A, 0.000%, 11/15/38 – NPFG Insured
     
1,780
 
Leander Independent School District, Williamson and Travis Counties, Texas, General Obligation
8/16 at 35.23
AAA
591,992
   
Bonds, Series 2007, 0.000%, 8/15/37
     
2,260
 
Love Field Airport Modernization Corporation, Texas, Special Facilities Revenue Bonds,
11/20 at 100.00
BBB
2,439,715
   
Southwest Airlines Company, Series 2010, 5.250%, 11/01/40
     
2,000
 
North Texas Tollway Authority, System Revenue Bonds, Refunding First Tier Capital Appreciation
1/25 at 100.00
A2
2,521,000
   
Series 2008I, 6.500%, 1/01/43
     
1,440
 
Spring Branch Independent School District, Harris County, Texas, General Obligation Bonds,
6/41 at 100.00
AAA
1,457,525
   
Schoolhouse Series 2013, 0.000%, 6/15/41 (Mandatory put 6/15/15)
     
5,000
 
Texas Municipal Gas Acquisition and Supply Corporation III, Gas Supply Revenue Bonds, Series
No Opt. Call
A3
5,590,800
   
2012, 5.000%, 12/15/26
     
830
 
Wood County Central Hospital District, Texas, Revenue Bonds, East Texas Medical Center Quitman
11/21 at 100.00
Baa2
938,406
   
Project, Series 2011, 6.000%, 11/01/41
     
32,205
 
Total Texas
   
25,753,905
   
Virginia – 5.2%
     
1,000
 
Fairfax County Economic Development Authority, Virginia, Residential Care Facilities Mortgage
10/17 at 100.00
BBB
1,036,080
   
Revenue Bonds, Goodwin House, Inc., Series 2007A, 5.125%, 10/01/42
     
2,000
 
Fairfax County Economic Development Authority, Virginia, Transportation District Improvement
No Opt. Call
AA
2,024,060
   
Revenue Bonds, Silver Line Phase 1 Project, Series 2011, 5.000%, 4/01/15
     
815
 
Henrico County Economic Development Authority, Virginia, Residential Care Facility Revenue
10/15 at 101.00
BBB+
829,230
   
Bonds, Westminster Canterbury of Richmond, Series 2006, 5.000%, 10/01/35
     
2,000
 
Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Second Senior Lien
10/28 at 100.00
BBB+
2,138,840
   
Revenue Bonds, Dulles Metrorail Capital Appreciation, Series 2010B, 0.000%, 10/01/44
     
1,935
 
Route 460 Funding Corporation, Virginia, Toll Road Revenue Bonds, Series 2012A, 5.125%, 7/01/49
No Opt. Call
BBB–
2,095,624
400
 
Stafford County Economic Development Authority, Virginia, Hospital Facilities Revenue Bonds,
6/16 at 100.00
Baa1
410,416
   
MediCorp Health System, Series 2006, 5.250%, 6/15/37
     
   
Virginia Small Business Financing Authority, Senior Lien Revenue Bonds, Elizabeth River
     
   
Crossing, Opco LLC Project, Series 2012:
     
1,000
 
5.250%, 1/01/32 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
1,100,710
650
 
6.000%, 1/01/37 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
747,136
1,010
 
5.500%, 1/01/42 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
1,104,597
1,390
 
Virginia Small Business Financing Authority, Wellmont Health System Project Revenue Bonds,
9/17 at 100.00
BBB+
1,452,786
   
Series 2007A, 5.250%, 9/01/37
     
12,200
 
Total Virginia
   
12,939,479
   
Washington – 4.2%
     
3,500
 
Central Puget Sound Regional Transit Authority, Washington, Sales and Use Tax Revenue Bonds,
5/15 at 100.00
AAA
3,556,595
   
Series 2005A, 5.000%, 11/01/23 (Pre-refunded 5/01/15) – AMBAC Insured
     
990
 
Washington Health Care Facilities Authority, Revenue Bonds, Fred Hutchinson Cancer Research
1/21 at 100.00
A
1,089,465
   
Center, Series 2011A, 5.625%, 1/01/35
     
2,500
 
Washington State, General Obligation Motor Vehicle Fuel Tax Bonds, Series 2008D, 5.000%,
1/18 at 100.00
AA+ (4)
2,801,525
   
1/01/33 (Pre-refunded 1/01/18)
     
2,115
 
Washington State, Motor Vehicle Fuel Tax General Obligation Bonds, Series 2003F, 0.000%,
No Opt. Call
AA+
1,455,035
   
12/01/27 – NPFG Insured
     
1,560
 
Clark County Public Utility District 1, Washington, Electric System Revenue Bonds, Refunding
No Opt. Call
A1
1,560,000
   
Series 2005 5.000% 1/01/2015
     
10,665
 
Total Washington
   
10,462,620
   
West Virginia – 0.9%
     
500
 
West Virginia Hospital Finance Authority, Hospital Revenue Bonds, West Virginia United Health
6/16 at 100.00
A
511,160
   
Project, Series 2006A, 4.500%, 6/01/26 – AMBAC Insured
     
1,500
 
West Virginia Hospital Finance Authority, Hospital Revenue Bonds, West Virginia United Health
6/23 at 100.00
A
1,730,025
   
System Obligated Group, Refunding and Improvement Series 2013A, 5.500%, 6/01/44
     
2,000
 
Total West Virginia
   
2,241,185
   
Wisconsin – 2.8%
     
1,645
 
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Mercy Alliance, Inc.,
6/22 at 100.00
A2
1,810,553
   
Series 2012, 5.000%, 6/01/39
     
1,500
 
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan
8/16 at 100.00
A–
1,566,720
   
Healthcare System, Series 2006A, 5.250%, 8/15/31
     
2,500
 
Wisconsin Public Power Incorporated System, Power Supply System Revenue Bonds, Series 2005A,
7/15 at 100.00
AA+ (4)
2,559,875
   
5.000%, 7/01/35 (Pre-refunded 7/01/15) – AMBAC Insured
     
990
 
Wisconsin, General Obligation Refunding Bonds, Series 2003-3, 5.000%, 11/01/26
3/15 at 100.00
AA
993,901
6,635
 
Total Wisconsin
   
6,931,049
$ 334,405
 
Total Municipal Bonds (cost $ 221,839,116)
   
246,546,543
             
Principal
           
Amount (000)
 
Description (1)
Coupon
Maturity
Ratings (3)
Value
   
CORPORATE BONDS – 0.0%
       
             
   
Transportation – 0.0%
       
$ 207
 
Las Vegas Monorail Company, Senior Interest Bonds (5), (7)
5.500%
7/15/19
N/R
$ 37,268
56
 
Las Vegas Monorail Company, Senior Interest Bonds (5), (7)
3.000%
7/15/55
N/R
7,466
$ 263
 
Total Corporate Bonds (cost $20,976)
     
44,734
   
Total Long-Term Investments (cost $221,860,092)
     
246,591,277
   
Other Assets Less Liabilities – 1.5% (9)
     
3,794,428
   
Net Assets – 100%
     
$ 250,385,705
 
 
 
 

 
 
 
Investments in Derivatives as of December 31, 2014 
Interest Rate Swaps outstanding:
 
Counterparty
Notional
Amount
Fund
Pay/Receive
Floating Rate
Floating
Rate
Index
Fixed Rate
(Annualized)
Fixed Rate
Payment
Frequency
Effective
Date (10)
Termination
Date
Unrealized
Appreciation
(Depreciation) (9)
Barclays
$20,100,000
Receive
USD-BMA
2.728%
Quarterly
5/28/15
5/28/24
$(1,480,296)
JPMorgan
2,500,000
Receive
USD-BMA
3.230   
Quarterly
6/01/15
6/01/35
(364,743)
 
$22,600,000
           
$(1,845,039)
 
Fair Value Measurements
 
Fair value is defined as the price that would be received upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market for the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The following is a summary of the three-tiered hierarchy of valuation input levels.
 
Level 1 – Inputs are unadjusted and prices are determined using quoted prices in active markets for identical securities.
 
Level 2 – Prices are determined using other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).
 
Level 3 – Prices are determined using significant unobservable inputs (including management's assumptions in determining the fair value of investments).
 
The inputs or methodologies used for valuing securities are not an indication of the risks associated with investing in those securities. The following is a summary of the Fund's fair value measurements as of the end of the reporting period:
         
 
Level 1
Level 2
Level 3
Total
Long-Term Investments:
       
Municipal Bonds
$ —
$245,797,450
$749,093
$246,546,543
Corporate Bonds
44,734
44,734
Investments in Derivatives:
       
Interest Rate Swaps*
(1,845,039)
(1,845,039)
Total
$ —
$243,952,411
$793,827
$244,746,238
*Represents net unrealized appreciation (depreciation).
 
Income Tax Information
 
The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate securities reflected as financing transactions, if any. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts on the Statement of Assets and Liabilities presented in the annual report, based on their federal tax basis treatment; temporary differences do not require reclassification. Temporary and permanent differences do not impact the net asset value of the Fund.
 
As of December 31, 2014, the cost of investments (excluding investments in derivatives) was $220,564,583.
 
Gross unrealized appreciation and gross unrealized depreciation of investments (excluding investments in derivatives) as of December 31, 2014, were as follows:
   
Gross unrealized:
 
Appreciation
$28,115,434
Depreciation
(2,088,740)
Net unrealized appreciation (depreciation) of investments
$26,026,694
     
(1)
 
All percentages shown in the Portfolio of Investments are based on net assets.
(2)
 
Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption.
   
There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities
   
may be subject to periodic principal paydowns.
(3)
 
Ratings: Using the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service,
   
Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. Ratings below BBB by Standard & Poor’s, Baa by Moody’s
   
or BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by
   
any of these national rating agencies.
(4)
 
Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities,
   
which ensure the timely payment of principal and interest. Certain bonds backed by U.S. Government or
   
agency securities are regarded as having an implied rating equal to the rating of such securities.
(5)
 
Investment valued at fair value using methods determined in good faith by, or at the discretion of, the
   
Board. For fair value measurement disclosure purposes, investment classified as Level 3.
(6)
 
At or subsequent to the end of the reporting period, this security is non-income producing. Non-income
   
producing, in the case of a fixed-income security, generally denotes that the issuer has (1) defaulted on
   
the payment of principal or interest, (2) is under the protection of the Federal Bankruptcy Court or (3) the
   
Fund’s Adviser has concluded that the issue is not likely to meet its future interest payment obligations
   
and has directed the Fund’s custodian to cease accruing additional income on the Fund’s records.
(7)
 
During January 2010, Las Vegas Monorail Company (“Las Vegas Monorail”) filed for federal bankruptcy
   
protection. During March 2012, Las Vegas Monorail emerged from federal bankruptcy with the acceptance
   
of a reorganization plan assigned by the Federal Bankruptcy Court. Under the reorganization plan, the Fund
   
surrendered its Las Vegas Monorail Project Revenue Bonds, First Tier, Series 2000 and in turn received
   
two senior interest corporate bonds: the first with an annual coupon rate of 5.500% maturing on July 15,
   
2019 and the second with an annual coupon rate of 3.000% (5.500% after December 31, 2015) maturing
   
on July 15, 2055. The Fund’s custodian is not accruing income on the Fund’s records for either senior
   
interest corporate bond.
(8)
 
Investment, or portion of investment, has been pledged to collateralize the net payment obligations for in
   
derivatives.
(9)
 
Other Assets Less Liabilities includes the Unrealized Appreciation (Depreciation) of derivative instruments
   
as listed within Investments in Derivatives as of the end of the reporting period.
(10)
 
Effective date represents the date on which both the Fund and Counterparty commence interest payment
   
accruals on each contract.
(IF)
 
Inverse floating rate investment.
USD-BMA
 
United States Dollar-Bond Market Association.
 
 
 
 

 
 
Item 2. Controls and Procedures.

a.  
The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
 
b.  
There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.
 
Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: See EX-99 CERT attached hereto.

 
 
 

 
 
SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
(Registrant)  Nuveen Select Tax-Free Income Portfolio 
 
By (Signature and Title)     /s/ Kevin J. McCarthy                    
                                                   Kevin J. McCarthy
                                                   Vice President and Secretary
 
Date:         February 27, 2015        
 
Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
 
By (Signature and Title)     /s/ Gifford R. Zimmerman                    
                                                    Gifford R. Zimmerman
                                                  Chief Administrative Officer (principal executive officer) 
 
Date:         February 27, 2015        
 
By (Signature and Title)     /s/ Stephen D. Foy                              
                                                   Stephen D. Foy
                                                  Vice President and Controller (principal financial officer) 
 
Date:         February 27, 2015