Unassociated Document



 
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 811-6548
 
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:         6/30/13         
 
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 (Unaudited)
     
           
   
Nuveen Select Tax-Free Income Portfolio (NXP)
     
   
   June 30, 2013
     
 
Principal
   
Optional Call
   
Amount (000)
 
Description (1)
Provisions (2)
Ratings (3)
Value
   
Municipal Bonds – 95.2%
     
   
Alaska – 1.9%
     
$ 2,475
 
Alaska Municipal Bond Bank Authority, General Obligation Bonds, Series 2003E, 5.250%, 12/01/23
12/13 at 100.00
AA (4)
$ 2,527,594
   
(Pre-refunded 12/01/13) – NPFG Insured
     
2,675
 
Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds,
6/14 at 100.00
B+
2,088,159
   
Series 2006A, 5.000%, 6/01/46
     
5,150
 
Total Alaska
   
4,615,753
   
Arizona – 3.5%
     
2,500
 
Arizona Health Facilities Authority, Hospital Revenue Bonds, Catholic Healthcare West, Series
3/21 at 100.00
A
2,572,150
   
2011B-1&2, 5.250%, 3/01/39
     
3,000
 
Arizona School Facilities Board, Certificates of Participation, Series 2003A, 5.000%, 9/01/13 –
No Opt. Call
A+
3,024,690
   
NPFG Insured
     
2,000
 
Phoenix, Arizona, Refunding Bonds, Series 2009C, 2.500%, 7/01/13
No Opt. Call
Aa1
2,000,380
625
 
Pima County Industrial Development Authority, Arizona, Revenue Bonds, Tucson Electric Power
10/20 at 100.00
Baa2
628,694
   
Company, Series 2010A, 5.250%, 10/01/40
     
8,125
 
Total Arizona
   
8,225,914
   
Arkansas – 0.4%
     
5,915
 
Arkansas Development Finance Authority, Tobacco Settlement Revenue Bonds, Arkansas Cancer
No Opt. Call
Aa2
1,004,544
   
Research Center Project, Series 2006, 0.000%, 7/01/46 – AMBAC Insured
     
   
California – 11.3%
     
2,000
 
Alameda Corridor Transportation Authority, California, Revenue Bonds, Refunding Subordinate
10/17 at 100.00
BBB+
2,148,840
   
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–
1,585,794
   
2002 Series 2007, 0.000%, 8/01/31 – AGM Insured
     
2,340
 
Anaheim Public Finance Authority, California, Subordinate Lease Revenue Bonds, Public
No Opt. Call
AA–
900,221
   
Improvement Project, Series 1997C, 0.000%, 9/01/30 – AGM Insured
     
895
 
California Statewide Community Development Authority, Revenue Bonds, Methodist Hospital
8/19 at 100.00
Aa2
1,056,521
   
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
1,105,126
   
2006C, 0.000%, 8/01/36 – AGM Insured
     
2,645
 
Cypress Elementary School District, Orange County, California, General Obligation Bonds,
No Opt. Call
AA
834,894
   
Series 2009A, 0.000%, 5/01/34 – AGM Insured
     
2,130
 
Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement
No Opt. Call
A2
1,081,997
   
Asset-Backed Revenue Bonds, Series 2005A, 0.000%, 6/01/28 – AMBAC Insured
     
2,350
 
Golden Valley Unified School District, Madera County, California, General Obligation Bonds,
8/17 at 56.07
AA–
970,809
   
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
Aa2
1,839,755
   
Series 2006, 0.000%, 8/01/25 – NPFG Insured
     
365
 
Los Angeles, California, Parking System Revenue Bonds, Series 1999A, 5.250%, 5/01/29 –
11/13 at 100.00
AA–
369,442
   
AMBAC Insured
     
1,000
 
Moreno Valley Unified School District, Riverside County, California, General Obligation Bonds,
No Opt. Call
AA–
621,900
   
Series 2007, 0.000%, 8/01/23 – NPFG Insured
     
5,395
 
Napa Valley Community College District, Napa and Sonoma Counties, California, General
8/17 at 46.57
Aa2
2,076,751
   
Obligation Bonds, Election 2002 Series 2007C, 0.000%, 8/01/32 – NPFG Insured
     
3,000
 
New Haven Unified School District, Alameda County, California, General Obligation Bonds,
No Opt. Call
Aa3
1,392,780
   
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
Baa3
632,728
   
6.750%, 11/01/39
     
4,390
 
Pittsburg Redevelopment Agency, California, Tax Allocation Bonds, Los Medanos Community
No Opt. Call
A
1,761,795
   
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
A+
511,530
   
Participation, Series 2006, 0.000%, 10/01/34 – FGIC Insured
     
8,000
 
Poway Unified School District, San Diego County, California, School Facilities Improvement
No Opt. Call
Aa2
2,785,760
   
District 2007-1 General Obligation Bonds, Series 2009A, 0.000%, 8/01/33
     
2,930
 
San Joaquin Hills Transportation Corridor Agency, Orange County, California, Toll Road Revenue
No Opt. Call
A
1,341,588
   
Refunding Bonds, Series 1997A, 0.000%, 1/15/27 – NPFG Insured
     
1,250
 
San Jose, California, Airport Revenue Bonds, Series 2004D, 5.000%, 3/01/28 – NPFG Insured
3/14 at 100.00
A
1,273,150
2,110
 
Sierra Sands Unified School District, Kern County, California, General Obligation Bonds,
No Opt. Call
AA
926,121
   
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–
1,000,215
   
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
486,289
   
Series 2007, 0.000%, 10/01/30 – AMBAC Insured
     
56,450
 
Total California
   
26,704,006
   
Colorado – 5.6%
     
2,950
 
Colorado Department of Transportation, Revenue Anticipation Bonds, Series 2003A, 5.250%,
12/13 at 100.00
AA (4)
3,018,116
   
12/15/15 (Pre-refunded 12/15/13) – AMBAC Insured
     
1,000
 
Colorado Health Facilities Authority, Colorado, Revenue Bonds, Sisters of Charity of
1/20 at 100.00
AA
1,014,970
   
Leavenworth Health Services Corporation, Series 2010A, 5.000%, 1/01/40
     
1,900
 
Denver City and County, Colorado, Airport System Revenue Bonds, Series 1991D, 7.750%, 11/15/13
No Opt. Call
A+
1,950,597
   
(Alternative Minimum Tax)
     
3,000
 
Denver Convention Center Hotel Authority, Colorado, Revenue Bonds, Convention Center Hotel,
12/13 at 100.00
N/R (4)
3,059,130
   
Senior Lien Series 2003A, 5.000%, 12/01/23 (Pre-refunded 12/01/13) – SYNCORA GTY Insured
     
500
 
Denver, Colorado, Airport System Revenue Refunding Bonds, Series 2003B, 5.000%, 11/15/33
11/13 at 100.00
A+ (4)
509,035
   
(Pre-refunded 11/15/13) – SYNCORA GTY Insured
     
160
 
E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%, 9/01/29 –
No Opt. Call
A
66,838
   
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
A
681,060
   
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
A
2,891,875
   
NPFG Insured
     
24,010
 
Total Colorado
   
13,191,621
   
Florida – 2.2%
     
3,125
 
Collier County, Florida, Special Obligation Revenue Bonds, Refunding Series 2012, 4.000%, 10/01/13
No Opt. Call
AA
3,155,406
2,000
 
Halifax Hospital Medical Center, Florida, Revenue Bonds, Series 2006, 5.375%, 6/01/46
6/16 at 100.00
A–
2,036,140
5,125
 
Total Florida
   
5,191,546
   
Georgia – 0.9%
     
2,000
 
Franklin County Industrial Building Authority, Georgia, Revenue Bonds, Ty Cobb Regional
12/20 at 100.00
N/R
2,123,660
   
Medical Center Project, Series 2010, 8.125%, 12/01/45
     
   
Illinois – 13.1%
     
   
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
A
1,877,714
2,000
 
0.000%, 4/01/23 – NPFG Insured
No Opt. Call
A
1,267,100
735
 
Chicago Board of Education, Cook County, Illinois, General Obligation Bonds, Dedicated
12/21 at 100.00
A+
736,477
   
Revenues Series 2011A, 5.000%, 12/01/41
     
2,000
 
Chicago, Illinois, Third Lien General Airport Revenue Bonds, O’Hare International Airport,
1/14 at 100.00
AA–
2,050,760
   
Series 2003F, 5.500%, 1/01/15 – CIFG Insured
     
   
DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,
     
   
Series 2003B:
     
805
 
5.250%, 11/01/20 (Pre-refunded 11/01/13) – AGM Insured
11/13 at 100.00
Aa3 (4)
818,693
195
 
5.250%, 11/01/20 (Pre-refunded 1/01/14) – AGM Insured
1/14 at 100.00
AA (4)
199,935
750
 
Illinois Educational Facilities Authority, Revenue Bonds, Northwestern University, Series
12/13 at 100.00
AAA
760,163
   
2003, 5.000%, 12/01/38
     
1,050
 
Illinois Finance Authority, Revenue Bonds, Loyola University of Chicago, Tender Option Bond
No Opt. Call
Aa1
1,109,199
   
Trust 1137, 9.436%, 7/01/15 (IF)
     
4,000
 
Illinois Finance Authority, Revenue Bonds, Northwestern Memorial Hospital, Series 2004A,
8/14 at 100.00
N/R (4)
4,234,560
   
5.500%, 8/15/43 (Pre-refunded 8/15/14)
     
260
 
Illinois Finance Authority, Revenue Bonds, Rehabilitation Institute of Chicago, Series 2013A,
7/23 at 100.00
A–
268,588
   
6.000%, 7/01/43 (WI/DD, Settling 7/11/13)
     
1,000
 
Illinois Finance Authority, Revenue Bonds, Silver Cross Hospital and Medical Centers, Series
8/19 at 100.00
BBB+
1,118,280
   
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+
2,175,180
   
Centers, Series 2008A, 5.500%, 8/15/30
     
2,275
 
Illinois Health Facilities Authority, Revenue Refunding Bonds, Elmhurst Memorial Healthcare,
9/13 at 100.00
Baa2
2,283,941
   
Series 2002, 6.250%, 1/01/17
     
2,190
 
Illinois State, General Obligation Bonds, Refunding Series 2012, 5.000%, 8/01/23
No Opt. Call
A–
2,361,192
1,000
 
Kendall, Kane, and Will Counties Community Unit School District 308 Oswego, Illinois, General
No Opt. Call
Aa2
644,260
   
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
A
1,842,342
   
Project, Series 1993A, 0.010%, 6/15/17 – FGIC Insured
     
1,135
 
Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion
No Opt. Call
A (4)
1,076,718
   
Project, Series 1993A, 0.000%, 6/15/17 – FGIC Insured (ETM)
     
   
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
760,360
810
 
0.000%, 6/15/30 – NPFG Insured
No Opt. Call
AAA
343,578
6,070
 
0.000%, 12/15/31 – NPFG Insured
No Opt. Call
AAA
2,356,799
5,000
 
0.000%, 12/15/36 – NPFG Insured
No Opt. Call
AAA
1,415,900
1,300
 
Schaumburg, Illinois, General Obligation Bonds, Series 2004B, 5.250%, 12/01/34 (Pre-refunded
12/14 at 100.00
AAA
1,392,170
   
12/01/14) – FGIC Insured
     
40,850
 
Total Illinois
   
31,093,909
   
Indiana – 1.7%
     
1,000
 
Franklin Community Multi-School Building Corporation, Johnson County, Indiana, First Mortgage
7/14 at 100.00
A+ (4)
1,049,470
   
Revenue Bonds, Series 2004, 5.000%, 7/15/22 (Pre-refunded 7/15/14) – FGIC Insured
     
975
 
Indiana Health Facility Financing Authority, Hospital Revenue Refunding Bonds, Columbus
No Opt. Call
AA–
1,031,833
   
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–
1,043,260
   
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+
794,535
   
Series 2005, 5.000%, 7/15/22 – NPFG Insured
     
3,725
 
Total Indiana
   
3,919,098
   
Iowa – 2.6%
     
1,665
 
Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company
No Opt. Call
BB–
1,660,421
   
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+
862,010
   
5.375%, 6/01/38
     
4,000
 
Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B,
6/17 at 100.00
B+
3,612,280
   
5.600%, 6/01/34
     
6,665
 
Total Iowa
   
6,134,711
   
Kansas – 0.5%
     
500
 
Lawrence, Kansas, Hospital Revenue Bonds, Lawrence Memorial Hospital, Refunding Series 2006,
7/16 at 100.00
A1
501,800
   
4.875%, 7/01/36
     
750
 
Wamego, Kansas, Pollution Control Revenue Bonds, Kansas Gas and Electric Company, Series 2004,
6/14 at 100.00
A
757,185
   
5.300%, 6/01/31 – NPFG Insured
     
1,250
 
Total Kansas
   
1,258,985
   
Kentucky – 1.1%
     
2,500
 
Kentucky Economic Development Finance Authority, Hospital Revenue Bonds, Baptist Healthcare
8/21 at 100.00
AA–
2,579,350
   
System Obligated Group, Series 2011, 5.250%, 8/15/46
     
   
Louisiana – 1.2%
     
2,790
 
Tobacco Settlement Financing Corporation, Louisiana, Tobacco Settlement Asset-Backed Bonds,
11/13 at 100.00
A–
2,783,025
   
Series 2001B, 5.875%, 5/15/39
     
   
Massachusetts – 1.7%
     
500
 
Massachusetts Health and Educational Facilities Authority, Revenue Bonds, CareGroup Inc.,
7/18 at 100.00
A–
512,110
   
Series 2008E-1 &2, 5.000%, 7/01/28
     
1,865
 
Massachusetts Housing Finance Agency, Housing Bonds, Series 2009F, 5.700%, 6/01/40
12/18 at 100.00
AA–
1,957,877
1,600
 
Massachusetts Water Pollution Abatement Trust, Pooled Loan Program Bonds, Series 2003-9,
8/13 at 100.00
AAA
1,606,925
   
5.000%, 8/01/23 (Pre-refunded 8/01/13)
     
3,965
 
Total Massachusetts
   
4,076,912
   
Michigan – 2.6%
     
355
 
Detroit Water and Sewerage Department, Michigan, Sewage Disposal System Revenue Bonds,
7/22 at 100.00
A+
345,188
   
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+
1,558,035
   
7/01/31 – BHAC Insured
     
2,450
 
Detroit, Michigan, Sewer Disposal System Revenue Bonds, Second Lien, Series 2006B, 5.000%,
7/16 at 100.00
A
2,417,979
   
7/01/33 – FGIC Insured
     
1,910
 
Detroit, Michigan, Water Supply System Senior Lien Revenue Bonds, Series 2004A, 4.500%,
7/16 at 100.00
A
1,856,463
   
7/01/25 – NPFG Insured
     
6,215
 
Total Michigan
   
6,177,665
   
Missouri – 2.1%
     
   
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–
823,247
5,000
 
0.000%, 4/15/30 – AMBAC Insured
No Opt. Call
AA–
2,217,300
2,000
 
Missouri State Health and Educational Facilities Authority, Health Facilities Revenue Bonds,
11/23 at 100.00
A2
2,018,440
   
CoxHealth, Series 2013A, 5.000%, 11/15/38
     
8,165
 
Total Missouri
   
5,058,987
   
Nevada – 2.3%
     
750
 
Clark County, Nevada, Airport Revenue Bonds, Tender Option Bond Trust 11823, 20.654%, 1/01/18 (IF)
No Opt. Call
A+
1,051,830
1,000
 
Clark County, Nevada, Passenger Facility Charge Revenue Bonds, Las Vegas-McCarran
1/20 at 100.00
A+
1,055,170
   
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–
1,644,570
   
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+
1,720,032
   
6/01/18 – FGIC Insured
     
4,850
 
Total Nevada
   
5,471,602
   
New Jersey – 6.5%
     
2,500
 
New Jersey Health Care Facilities Financing Authority, Revenue Bonds, Somerset Medical Center,
9/13 at 100.00
Ba2
2,502,875
   
Series 2003, 5.500%, 7/01/23
     
35,000
 
New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2006C,
No Opt. Call
AA–
10,785,950
   
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
2,006,075
   
Series 2007-1A, 5.000%, 6/01/41
     
40,000
 
Total New Jersey
   
15,294,900
   
New Mexico – 2.6%
     
1,000
 
Gallup McKinley County School District 1, New Mexico, General Obligation Bonds, Series 2011B,
No Opt. Call
Aa1
1,001,630
   
2.000%, 8/01/13
     
1,000
 
New Mexico Mortgage Finance Authority, Multifamily Housing Revenue Bonds, St Anthony, Series
9/17 at 100.00
N/R
1,010,740
   
2007A, 5.250%, 9/01/42 (Alternative Minimum Tax)
     
4,000
 
University of New Mexico, FHA-Insured Hospital Mortgage Revenue Bonds, University of Mexico
7/14 at 100.00
AA–
4,046,360
   
Hospital Project, Series 2004, 4.625%, 7/01/25 – AGM Insured
     
6,000
 
Total New Mexico
   
6,058,730
   
New York – 3.8%
     
1,000
 
Dormitory Authority of the State of New York, FHA-Insured Mortgage Revenue Bonds, Kaleida
2/14 at 100.00
AAA
1,028,350
   
Health, Series 2004, 5.050%, 2/15/25 (Pre-refunded 2/15/14)
     
500
 
Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Senior Fiscal 2012 Series
2/21 at 100.00
A
520,270
   
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
1,830,073
   
2/15/47 – FGIC Insured
     
2,385
 
Long Island Power Authority, New York, Electric System Revenue Bonds, Refunding Series 2010A,
No Opt. Call
A
2,476,846
   
5.000%, 5/01/14
     
2,500
 
New York City Transitional Finance Authority, New York, Future Tax Secured Bonds, Fiscal
5/17 at 100.00
AAA
2,669,150
   
Series 2007B, 4.750%, 11/01/27
     
530
 
Port Authority of New York and New Jersey, Special Project Bonds, JFK International Air
12/20 at 100.00
BBB–
592,084
   
Terminal LLC Project, Eighth Series 2010, 6.000%, 12/01/42
     
8,725
 
Total New York
   
9,116,773
   
North Carolina – 0.5%
     
1,000
 
North Carolina Eastern Municipal Power Agency, Power System Revenue Bonds, Series 2008C,
1/19 at 100.00
A–
1,185,330
   
6.750%, 1/01/24
     
   
Ohio – 1.7%
     
   
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
BB+
1,401,163
1,000
 
6.500%, 6/01/47
6/17 at 100.00
B
886,410
1,975
 
Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue
6/22 at 100.00
B
1,712,009
   
Bonds, Senior Lien, Series 2007A-3, 6.250%, 6/01/37
     
4,645
 
Total Ohio
   
3,999,582
   
Oklahoma – 2.2%
     
1,000
 
Norman Regional Hospital Authority, Oklahoma, Hospital Revenue Bonds, Series 2005,
9/16 at 100.00
BB+
1,007,750
   
5.375%, 9/01/36
     
4,000
 
Oklahoma Development Finance Authority, Revenue Bonds, St. John Health System, Series 2004,
2/14 at 100.00
A (4)
4,117,680
   
5.000%, 2/15/24 (Pre-refunded 2/15/14)
     
5,000
 
Total Oklahoma
   
5,125,430
   
Pennsylvania – 1.1%
     
500
 
Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, Widener University,
7/13 at 100.00
A–
501,505
   
Series 2003, 5.250%, 7/15/24
     
1,490
 
Pennsylvania Turnpike Commission, Motor License Fund-Enhanced Subordinate Special Revenue
12/20 at 100.00
AA
1,351,102
   
Bonds, Series 2010B, 0.000%, 12/01/30
     
700
 
Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Series 2004A, 5.500%, 12/01/31 –
12/14 at 100.00
A+
734,489
   
AMBAC Insured
     
2,690
 
Total Pennsylvania
   
2,587,096
   
Puerto Rico – 2.1%
     
1,000
 
Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Bonds, First Subordinate Series
8/19 at 100.00
A+
1,040,200
   
2009A, 6.000%, 8/01/42
     
   
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–
3,277,575
1,000
 
0.000%, 8/01/43 – NPFG Insured
No Opt. Call
AA–
164,470
7,000
 
0.000%, 8/01/54 – AMBAC Insured
No Opt. Call
AA–
531,090
26,500
 
Total Puerto Rico
   
5,013,335
   
Rhode Island – 0.5%
     
1,125
 
Rhode Island Economic Development Corporation, Airport Revenue Bonds, Refunding Series 2005A,
7/15 at 100.00
A
1,112,018
   
4.625%, 7/01/26 – NPFG Insured (Alternative Minimum Tax)
     
   
South Carolina – 1.2%
     
1,250
 
Dorchester County School District 2, South Carolina, Installment Purchase Revenue Bonds,
12/14 at 100.00
AA– (4)
1,335,400
   
GROWTH, Series 2004, 5.250%, 12/01/20 (Pre-refunded 12/01/14)
     
1,500
 
Lexington County Health Service District, South Carolina, Hospital Revenue Refunding and
11/13 at 100.00
AA– (4)
1,529,190
   
Improvement Bonds, Series 2003, 6.000%, 11/01/18 (Pre-refunded 11/01/13)
     
2,750
 
Total South Carolina
   
2,864,590
   
Texas – 12.1%
     
1,000
 
Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2005, 5.000%,
1/15 at 100.00
A (4)
1,066,830
   
1/01/35 (Pre-refunded 1/01/15) – FGIC Insured
     
250
 
Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2011,
1/21 at 100.00
Baa2
269,705
   
6.000%, 1/01/41
     
2,300
 
Harris County Health Facilities Development Corporation, Texas, Thermal Utility Revenue Bonds,
11/13 at 100.00
AA (4)
2,340,848
   
TECO Project, Series 2003, 5.000%, 11/15/30 (Pre-refunded 11/15/13) – NPFG Insured
     
3,415
 
Harris County-Houston Sports Authority, Texas, Revenue Bonds, Junior Lien Series 2001H,
No Opt. Call
A
1,226,361
   
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
A
1,062,033
   
0.000%, 11/15/35 – NPFG Insured
     
4,015
 
Harris County-Houston Sports Authority, Texas, Senior Lien Revenue Refunding Bonds, Series
11/30 at 61.17
A
886,392
   
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
554,150
   
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–
2,243,615
   
Southwest Airlines Company, Series 2010, 5.250%, 11/01/40
     
2,000
 
North Texas Tollway Authority, First Tier System Revenue Refunding Bonds, Capital Appreciation
1/25 at 100.00
A2
2,095,140
   
Series 2008I, 0.000%, 1/01/43
     
4,500
 
Richardson Hospital Authority, Texas, Revenue Bonds, Richardson Regional Medical Center,
12/13 at 100.00
A+
4,575,465
   
Series 2004, 6.000%, 12/01/34
     
5,000
 
Texas Municipal Gas Acquisition and Supply Corporation III, Gas Supply Revenue Bonds, Series
No Opt. Call
A3
5,085,250
   
2012, 5.000%, 12/15/26
     
1,000
 
Texas State, General Obligation Bonds, Water Financial Assistance, Series 2009E,
No Opt. Call
Aaa
1,003,520
   
4.000%, 8/01/13
     
3,500
 
Texas State, Public Finance Authority Revenue Bonds, Unemployment Compensation Obligation
No Opt. Call
Aaa
3,501,400
   
Assessment, Series 2010A, 5.000%, 7/01/13
     
1,750
 
Texas, General Obligation Bonds, Water Financial Assistance Program, Series 2003A, 5.125%,
8/13 at 100.00
Aaa
1,750,700
   
8/01/42 (Alternative Minimum Tax)
     
830
 
Wood County Central Hospital District, Texas, Revenue Bonds, East Texas Medical Center Quitman
11/21 at 100.00
Baa2
891,545
   
Project, Series 2011, 6.000%, 11/01/41
     
37,765
 
Total Texas
   
28,552,954
   
Virginia – 2.6%
     
1,000
 
Fairfax County Economic Development Authority, Virginia, Residential Care Facilities Mortgage
10/17 at 100.00
BBB
1,014,420
   
Revenue Bonds, Goodwin House, Inc., Series 2007A, 5.125%, 10/01/42
     
1,000
 
Henrico County Economic Development Authority, Virginia, Residential Care Facility Revenue
9/13 at 102.50
BBB
1,003,540
   
Bonds, Westminster Canterbury of Richmond, Series 2006, 5.000%, 10/01/35
     
2,000
 
Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Revenue Bonds, Dulles
10/28 at 100.00
BBB+
1,602,600
   
Metrorail Capital Appreciation, Series 2010B, 0.000%, 10/01/44
     
   
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–
972,320
650
 
6.000%, 1/01/37 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
664,508
1,010
 
5.500%, 1/01/42 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
969,348
6,660
 
Total Virginia
   
6,226,736
   
Washington – 1.7%
     
990
 
Washington Health Care Facilities Authority, Revenue Bonds, Fred Hutchinson Cancer Research
1/21 at 100.00
A
1,034,946
   
Center, Series 2011A, 5.625%, 1/01/35
     
1,790
 
Washington State Tobacco Settlement Authority, Tobacco Settlement Asset-Backed Revenue Bonds,
9/13 at 100.00
A3
1,809,654
   
Series 2002, 6.500%, 6/01/26
     
2,115
 
Washington State, Motor Vehicle Fuel Tax General Obligation Bonds, Series 2003F, 0.000%,
No Opt. Call
AA+
1,255,189
   
12/01/27 – NPFG Insured
     
4,895
 
Total Washington
   
4,099,789
   
West Virginia – 0.2%
     
500
 
West Virginia Hospital Finance Authority, Hospital Revenue Bonds, United Hospital Center Inc.
6/16 at 100.00
A
506,845
   
Project, Series 2006A, 4.500%, 6/01/26 – AMBAC Insured
     
   
Wisconsin – 1.7%
     
1,645
 
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Mercy Alliance, Inc.,
6/22 at 100.00
A2
1,654,936
   
Series 2012, 5.000%, 6/01/39
     
1,000
 
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan
8/13 at 100.00
A–
1,006,130
   
Services Inc., Series 2003A, 5.500%, 8/15/17
     
1,440
 
Wisconsin, General Obligation Refunding Bonds, Series 2003-3, 5.000%, 11/01/26
11/13 at 100.00
AA
1,461,917
4,085
 
Total Wisconsin
   
4,122,983
$ 340,090
 
Total Municipal Bonds (cost $214,477,786)
225,478,379
 
             
Principal
           
Amount (000)
 
Description (1)
Coupon
Maturity
Ratings (3)
Value
   
Corporate Bonds – 0.0%
       
   
Transportation – 0.0%
       
$ 191
 
Las Vegas Monorail Company, Senior Interest Bonds (5), (6)
5.500%
7/15/19
N/R
$             47,690
56
 
Las Vegas Monorail Company, Senior Interest Bonds (5), (6)
3.000%
7/15/55
N/R
11,165
$ 247
 
Total Corporate Bonds (cost $4,690)
     
58,855
 
           
Principal
   
Optional Call
   
Amount (000)
 
Description (1)
Provisions (2)
Ratings (3)
Value
   
Short-Term Investments – 1.5%
     
   
Texas – 1.5%
     
$     3,520
 
Texas State, Tax and Revenue Anticipation Notes, Series 2012, 2.500%, 8/30/13 (7)
No Opt. Call
SP-1+
$     3,534,538
   
Total Short-Term Investments (cost $3,533,560)
   
3,534,538
   
Total Investments (cost $218,016,036) – 96.7%
   
229,071,772
   
Other Assets Less Liabilities – 3.3%
   
7,755,896
   
Net Assets – 100%
   
$ 236,827,668
 
 
 
 
 

 
 
Fair Value Measurements
 
Fair value is defined as the price that the Fund would receive 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
$ —
$225,478,379
$ —
$225,478,379
Corporate Bonds
58,855
58,855
Short-Term Investments:
       
   Municipal Bonds
3,534,538
3,534,538
Total
$ —
$229,012,917
$58,855
$229,071,772
 
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 June 30, 2013, the cost of investments was $217,096,622.
 
Gross unrealized appreciation and gross unrealized depreciation of investments as of June 30, 2013, were as follows:
   
Gross unrealized:
 
  Appreciation
$13,944,259
  Depreciation
(1,969,109)
Net unrealized appreciation (depreciation) of investments
$11,975,150
 
(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 of Trustees. For fair value measurement disclosure purposes, investment classified as Level 3.
(6)
 
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.
(7)
 
Investment has a maturity of more than a year, but has variable rate and demand features which qualify it
   
as a short-term investment. The rate disclosed is that in effect at the end of the reporting period. This rate
   
changes periodically based on market conditions or a specified market index.
N/R
 
Not rated.
WI/DD
 
Investment, or portion of investment purchased on a when-issued or delayed delivery basis.
(ETM)
 
Escrowed to maturity.
(IF)
 
Inverse floating rate investment.
 
 
 
 
 

 
 
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:         August 29, 2013        
 
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:         August 29, 2013        
 
By (Signature and Title)     /s/ Stephen D. Foy                              
                                                   Stephen D. Foy
                                                  Vice President and Controller (principal financial officer) 
 
Date:         August 29, 2013