Edgar Filing: NUVEEN SELECT TAX FREE INCOME PORTFOLIO

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 811-06548

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: 6/30/14

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 (Unaudited)

	Nuveen Select Tax-Free Income Portfolio (NXP)
	June 30, 2014


Principal		Optional Call
Amount (000)	Description (1)	Provisions (2)	Ratings (3)	Value
	LONG-TERM INVESTMENTS – 95.9%
	MUNICIPAL BONDS – 95.9%
	Alaska – 0.8%
$ 2,675	Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds,	9/14 at 100.00	B2	$ 2,022,755
	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	2,670,650
	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	Baa1	656,163
	Company, Series 2010A, 5.250%, 10/01/40
3,125	Total Arizona			3,326,813
	Arkansas – 0.5%
5,915	Arkansas Development Finance Authority, Tobacco Settlement Revenue Bonds, Arkansas Cancer	No Opt. Call	Aa2	1,238,483
	Research Center Project, Series 2006, 0.000%, 7/01/46 – AMBAC Insured
	California – 16.5%
2,000	Alameda Corridor Transportation Authority, California, Revenue Bonds, Refunding Subordinate	10/17 at 100.00	BBB+	2,156,640
	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	1,933,727
	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	1,068,023
	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+	3,302,130
	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–	2,542,802
	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	1,796,586
	2013I, 5.000%, 11/01/38
895	California Statewide Community Development Authority, Revenue Bonds, Methodist Hospital	8/19 at 100.00	Aa2	1,072,675
	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	1,189,226
	2006C, 0.000%, 8/01/36 – AGM Insured
2,645	Cypress Elementary School District, Orange County, California, General Obligation Bonds,	No Opt. Call	AA	1,025,308
	Series 2009A, 0.000%, 5/01/34 – AGM Insured
2,130	Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement	No Opt. Call	A1	1,242,493
	Asset-Backed Revenue Bonds, Series 2005A, 0.000%, 6/01/28 – AMBAC Insured
1,500	Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed	6/17 at 100.00	B	1,336,920
	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	1,138,199
	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	2,082,610
	Series 2006, 0.000%, 8/01/25 – NPFG Insured
1,320	Kaweah Delta Health Care District, California, Revenue Bonds, Series 2004, 5.250%, 8/01/25	8/14 at 100.00	Aa3(4)	1,325,861
	(Pre-refunded 8/01/14) – NPFG Insured
1,000	Moreno Valley Unified School District, Riverside County, California, General Obligation Bonds,	No Opt. Call	AA–	697,160
	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	670,190
	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	2,210,709
	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	AA–	1,445,610
	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	617,824
	6.750%, 11/01/39
4,390	Pittsburg Redevelopment Agency, California, Tax Allocation Bonds, Los Medanos Community	No Opt. Call	A	2,087,094
	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–	616,692
	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	3,383,440
	Facilities Improvement District 2007-1, Series 2009A, 0.000%, 8/01/33
2,930	San Joaquin Hills Transportation Corridor Agency, Orange County, California, Toll Road Revenue	No Opt. Call	AA–	1,507,426
	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	9/14 at 100.00	AA–	1,254,125
2,110	Sierra Sands Unified School District, Kern County, California, General Obligation Bonds,	No Opt. Call	AA	1,149,781
	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–	971,917
	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	575,380
	Series 2007, 0.000%, 10/01/30 – AMBAC Insured
67,005	Total California			40,400,548
	Colorado – 3.9%
1,780	Colorado Health Facilities Authority, Colorado, Revenue Bonds, Catholic Health Initiatives,	1/23 at 100.00	A+	1,944,401
	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–	1,056,290
	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	2,106,267
	5.000%, 11/15/43
160	E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%,	No Opt. Call	AA–	83,542
	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–	756,320
	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–	3,648,875
	NPFG Insured
19,375	Total Colorado			9,595,695
	Florida – 3.1%
2,000	Halifax Hospital Medical Center, Florida, Revenue Bonds, Series 2006, 5.375%, 6/01/46	6/16 at 100.00	BBB+	2,017,080
2,400	JEA St. Johns River Power Park System, Florida, Revenue Bonds, 2012-Issue 2 Series 25,	No Opt. Call	Aa2	2,423,616
	4.000%, 10/01/14
1,000	Miami-Dade County, Florida, General Obligation Bonds, Build Better Communities Program, Series	7/15 at 100.00	AA	1,046,150
	2005, 5.000%, 7/01/24 – NPFG Insured
2,000	Volusia County, Florida, Tax Revenue Bonds, Tourist Development, Series 2004, 5.000%, 12/01/34	12/14 at 100.00	A2(4)	2,040,900
	(Pre-refunded 12/01/14) – AGM Insured
7,400	Total Florida			7,527,746
	Georgia – 0.5%
2,000	Franklin County Industrial Building Authority, Georgia,Revenue Bonds, Ty Cobb Regional Medical	12/20 at 100.00	N/R	1,169,477
	Center Project, Series 2010, 8.125%, 12/01/45, (5)
	Illinois – 10.4%
	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–	2,037,323
2,000	0.000%, 4/01/23 – NPFG Insured	No Opt. Call	AA–	1,399,660
735	Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues Series	12/21 at 100.00	A+	741,086
	2011A, 5.000%, 12/01/41
1,050	Illinois Finance Authority, Revenue Bonds, Loyola University of Chicago, Tender Option Bond	No Opt. Call	AA+	1,216,142
	Trust 1137, 9.406%, 7/01/15 (IF)
4,000	Illinois Finance Authority, Revenue Bonds, Northwestern Memorial Hospital, Series 2004A,	8/14 at 100.00	N/R(4)	4,026,880
	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–	289,219
	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+	1,119,200
	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+	2,187,759
	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–	2,452,187
1,000	Kendall, Kane, and Will Counties Community Unit School District 308 Oswego,Illinois, General	No Opt. Call	Aa2	705,100
	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–	1,907,375
	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	883,014
810	0.000%, 6/15/30 – NPFG Insured	No Opt. Call	AAA	396,924
6,070	0.000%, 12/15/31 – NPFG Insured	No Opt. Call	AAA	2,743,883
5,000	0.000%, 12/15/36 – NPFG Insured	No Opt. Call	AAA	1,671,100
1,300	Schaumburg, Illinois, General Obligation Bonds, Series 2004B, 5.250%, 12/01/34 (Pre-refunded	12/14 at 100.00	AAA	1,327,989
	12/01/14) – FGIC Insured (6)
310	University of Illinois, Health Services Facilities System Revenue Bonds, Series 2013,	10/23 at 100.00	A	346,468
	6.000%, 10/01/42
34,000	Total Illinois			25,451,309
	Indiana – 1.0%
670	Indiana Health Facility Financing Authority, Hospital Revenue Refunding Bonds, Columbus	No Opt. Call	AA	692,137
	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	1,053,630
	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+	769,028
	Series 2005, 5.000%, 7/15/22 – NPFG Insured
2,420	Total Indiana			2,514,795
	Iowa – 2.5%
1,665	Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company	No Opt. Call	BB–	1,753,645
	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+	852,010
	5.375%, 6/01/38
4,000	Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B,	6/17 at 100.00	B+	3,609,480
	5.600%, 6/01/34
6,665	Total Iowa			6,215,135
	Kansas – 0.2%
500	Lawrence, Kansas, Hospital Revenue Bonds, Lawrence Memorial Hospital, Refunding Series 2006,	7/16 at 100.00	A1	508,535
	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+	2,682,100
	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–	524,925
	Series 2008E-1 &2, 5.000%, 7/01/28
1,835	Massachusetts Housing Finance Agency, Housing Bonds, Series 2009F, 5.700%, 6/01/40	12/18 at 100.00	AA–	1,910,345
2,335	Total Massachusetts			2,435,270
	Michigan – 3.8%
355	Detroit Water and Sewerage Department, Michigan, Sewage Disposal System Revenue Bonds,	7/22 at 100.00	BB+	353,580
	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+	1,586,040
	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–	2,505,425
	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–	2,018,809
	7/01/25 – NPFG Insured
2,905	Wayne County Airport Authority, Michigan, Revenue Bonds, Detroit Metropolitan Wayne County	12/15 at 100.00	AA–	2,933,208
	Airport, Series 2005, 5.000%, 12/01/34 – NPFG Insured (Alternative Minimum Tax)
9,335	Total Michigan			9,397,062
	Missouri – 2.4%
360	Bi-State Development Agency of the Missouri-Illinois Metropolitan District, Mass Transit Sales	10/18 at 100.00	AA+	405,220
	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	904,914
5,000	0.000%, 4/15/30 – AMBAC Insured	No Opt. Call	AA–	2,569,650
2,000	Missouri Health and Educational Facilities Authority, Health Facilities Revenue Bonds,	11/23 at 100.00	A2	2,143,680
	CoxHealth, Series 2013A, 5.000%, 11/15/38
8,525	Total Missouri			6,023,464
	Nevada – 2.4%
750	Clark County, Nevada, Airport Revenue Bonds, Tender Option Bond Trust Series 11823, 20.654%,	No Opt. Call	A+	1,236,780
	1/01/18 (IF)
1,250	Clark County, Nevada, Passenger Facility Charge Revenue Bonds, Las Vegas-McCarran	1/20 at 100.00	A+	1,351,800
	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–	1,730,040
	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+	1,669,840
	6/01/18 – FGIC Insured
5,100	Total Nevada			5,988,460
	New Jersey – 8.9%
940	New Jersey Economic Development Authority, Private Activity Bonds, The Goethals Bridge	1/24 at 100.00	AA	1,014,429
	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	7/14 at 100.00	AA–	2,577,515
	2004A, 5.250%, 7/01/33 – NPFG Insured
3,200	New Jersey Economic Development Authority, School Facilities Construction Financing Program	No Opt. Call	AAA	3,271,328
	Bonds, Series 2009Z, 5.000%, 12/15/14 (ETM)
35,000	New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2006C,	No Opt. Call	AA	13,000,400
	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	1,873,450
	Series 2007-1A, 5.000%, 6/01/41
44,190	Total New Jersey			21,737,122
	New Mexico – 2.0%
1,000	New Mexico Mortgage Finance Authority, Multifamily Housing Revenue Bonds, St Anthony, Series	9/17 at 100.00	N/R	1,008,920
	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	4,005,880
	Hospital Project, Series 2004, 4.625%, 7/01/25 – AGM Insured
5,000	Total New Mexico			5,014,800
	New York – 4.0%
500	Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Senior Fiscal 2012 Series	2/21 at 100.00	A	542,155
	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	1,878,020
	2/15/47 – FGIC Insured
3,750	Long Island Power Authority, New York, Electric System General Revenue Bonds, Series 2004A,	9/14 at 100.00	AA+	3,778,238
	5.000%, 9/01/34 – BHAC Insured
2,500	New York City Transitional Finance Authority, New York, Future Tax Secured Bonds, Fiscal	5/17 at 100.00	AAA	2,744,925
	Series 2007B, 4.750%, 11/01/27
780	Port Authority of New York and New Jersey, Special Project Bonds, JFK International Air	12/20 at 100.00	BBB	891,704
	Terminal LLC Project, Eighth Series 2010, 6.000%, 12/01/42
9,340	Total New York			9,835,042
	North Carolina – 0.5%
1,000	North Carolina Eastern Municipal Power Agency, Power System Revenue Bonds, Series 2008C,	1/19 at 100.00	A–	1,173,880
	6.750%, 1/01/24
	Ohio – 2.7%
	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	B+	1,337,904
1,000	6.500%, 6/01/47	6/17 at 100.00	B	857,030
1,975	Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue	6/22 at 100.00	B	1,659,494
	Bonds, Senior Lien, Series 2007A-3, 6.250%, 6/01/37
1,500	Ohio Department of Administrative Services, Certificates of Participation, Administrative	No Opt. Call	AA	1,513,110
	Knowledge System Project, Series 2005A, 5.250%, 9/01/14 – NPFG Insured
1,105	Ohio Turnpike Commission, Turnpike Revenue Bonds, Infrastructure Project, Junior Lien Series	2/23 at 100.00	A+	1,195,754
	2013A-1, 5.000%, 2/15/48
7,250	Total Ohio			6,563,292
	Oklahoma – 0.4%
1,000	Norman Regional Hospital Authority, Oklahoma, Hospital Revenue Bonds, Series 2005,	9/16 at 100.00	BBB–	1,021,770
	5.375%, 9/01/36
	Pennsylvania – 0.9%
1,490	Pennsylvania Turnpike Commission, Motor License Fund-Enhanced Subordinate Special Revenue	12/20 at 100.00	AA	1,492,965
	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+	713,062
	AMBAC Insured
2,190	Total Pennsylvania			2,206,027
	Puerto Rico – 1.6%
1,000	Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Bonds, First Subordinate Series	8/19 at 100.00	A+	832,260
	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–	2,998,625
1,000	0.000%, 8/01/43 – NPFG Insured	No Opt. Call	AA–	149,580
19,500	Total Puerto Rico			3,980,465
	Rhode Island – 0.5%
1,125	Rhode Island Economic Development Corporation, Airport Revenue Bonds, Refunding Series 2005A,	7/15 at 100.00	AA–	1,130,085
	4.625%, 7/01/26 – NPFG Insured (Alternative Minimum Tax)
	South Carolina – 1.7%
1,250	Dorchester County School District 2, South Carolina, Installment Purchase Revenue Bonds,	12/14 at 100.00	AA–(4)	1,276,875
	GROWTH, Series 2004, 5.250%, 12/01/20 (Pre-refunded 12/01/14)
2,710	Piedmont Municipal Power Agency, South Carolina, Electric Revenue Refunding Bonds, Series	No Opt. Call	A3	2,793,305
	1991A, 6.500%, 1/01/15 – NPFG Insured
3,960	Total South Carolina			4,070,180
	Texas – 11.0%
1,000	Board of Regents, University of Texas System, Financing System Revenue Bonds, Series 2006D,	No Opt. Call	AAA	1,004,940
	4.000%, 8/15/14
1,000	Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2005, 5.000%,	1/15 at 100.00	AA–(4)	1,024,390
	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	279,290
	6.000%, 1/01/41
3,000	Decatur Hospital Authority, Texas, Revenue Bonds, Wise Regional Health System, Series 2004A,	9/14 at 100.00	N/R(4)	3,034,830
	7.125%, 9/01/34 (Pre-refunded 9/01/14) (WI/DD, Settling 7/01/14)
5,565	Grand Parkway Transportation Corporation, Texas, System Toll Revenue Bonds, First Tier Series	10/23 at 100.00	BBB+	6,116,770
	2013A, 5.500%, 4/01/53
3,415	Harris County-Houston Sports Authority, Texas, Revenue Bonds, Junior Lien Series 2001H,	No Opt. Call	AA–	1,472,207
	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–	1,180,778
	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–	1,018,927
	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	575,118
	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–	2,423,149
	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	2,387,380
	Series 2008I, 0.000%, 1/01/43
5,000	Texas Municipal Gas Acquisition and Supply Corporation III, Gas Supply Revenue Bonds, Series	No Opt. Call	A3	5,468,300
	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	911,896
	Project, Series 2011, 6.000%, 11/01/41
34,280	Total Texas			26,897,975
	Virginia – 4.4%
1,000	Fairfax County Economic Development Authority, Virginia, Residential Care Facilities Mortgage	10/17 at 100.00	BBB	1,027,480
	Revenue Bonds, Goodwin House, Inc., Series 2007A, 5.125%, 10/01/42
1,000	Henrico County Economic Development Authority, Virginia, Residential Care Facility Revenue	9/14 at 100.00	BBB+	1,020,580
	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+	1,938,020
	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–	2,010,639
400	Stafford County Economic Development Authority, Virginia, Hospital Facilities Revenue Bonds,	6/16 at 100.00	Baa1	405,928
	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–	1,068,360
650	6.000%, 1/01/37 (Alternative Minimum Tax)	7/22 at 100.00	BBB–	718,133
1,010	5.500%, 1/01/42 (Alternative Minimum Tax)	7/22 at 100.00	BBB–	1,075,155
1,390	Virginia Small Business Financing Authority, Wellmont Health System Project Revenue Bonds,	9/17 at 100.00	BBB+	1,422,443
	Series 2007A, 5.250%, 9/01/37
10,385	Total Virginia			10,686,738
	Washington – 2.1%
990	Washington Health Care Facilities Authority, Revenue Bonds, Fred Hutchinson Cancer Research	1/21 at 100.00	A	1,068,962
	Center, Series 2011A, 5.625%, 1/01/35
2,500	Washington State, General Obligation Motor Vehicle Fuel Tax Bonds, Series 2008D,	No Opt. Call	AA+	2,760,975
	5.000%, 1/01/33
2,115	Washington State, Motor Vehicle Fuel Tax General Obligation Bonds, Series 2003F, 0.000%,	No Opt. Call	AA+	1,392,918
	12/01/27 – NPFG Insured
5,605	Total Washington			5,222,855
	West Virginia – 0.9%
500	West Virginia Hospital Finance Authority, Hospital Revenue Bonds, West Virginia United Health	6/16 at 100.00	A	511,520
	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	1,678,095
	System Obligated Group, Refunding and Improvement Series 2013A, 5.500%, 6/01/44
2,000	Total West Virginia			2,189,615
	Wisconsin – 2.8%
1,645	Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Mercy Alliance, Inc.,	6/22 at 100.00	A2	1,752,221
	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–	1,544,550
	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+	2,590,100
	5.000%, 7/01/35 – AMBAC Insured
990	Wisconsin, General Obligation Refunding Bonds, Series 2003-3, 5.000%, 11/01/26	9/14 at 100.00	AA	993,865
6,635	Total Wisconsin			6,880,736
$ 332,335	Total Municipal Bonds (cost $216,129,665)			235,108,229


Principal
Amount (000)	Description (1)	Coupon	Maturity	Ratings (3)	Value
	CORPORATE BONDS –0.0%
	Transportation –0.0%
$ 201	Las Vegas Monorail Company, Senior Interest Bonds (5), (7)	5.500%	7/15/19	N/R	$ 36,264
56	Las Vegas Monorail Company, Senior Interest Bonds (5), (7)	3.000%	7/15/55	N/R	7,467
$ 257	Total Corporate Bonds (cost $15,398)				43,731
	Total Long-Term Investments (cost $216,145,063)				235,151,960
	Other Assets Less Liabilities – 4.1% (8)				10,161,662
	Net Assets – 100%				$ 245,313,622


Investments in Derivatives as of June 30, 2014
Interest Rate Swaps outstanding:
		Fund			Fixed Rate			Unrealized
	Notional	Pay/Receive	Floating Rate	Fixed Rate	Payment	Effective	Termination	Appreciation
Counterparty	Amount	Floating Rate	Index	(Annualized)	Frequency	Date (9)	Date	(Depreciation) (8)
Barclays	$20,100,000	Receive	USD-BMA	2.728%	Quarterly	5/28/15	5/28/24	$(673,956)
JPMorgan	2,500,000	Receive	USD-BMA	3.230	Quarterly	6/01/15	6/01/35	(92,369)
	$22,600,000							$(766,325)

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	$ —	$233,938,752	$1,169,477	$235,108,229
Corporate Bonds	—	—	43,731	43,731
Investments in Derivatives:
Interest Rate Swaps*	—	(766,325)	—	(766,325)
Total	$ —	$233,172,427	$1,213,208	$234,385,635

* 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 June 30, 2014, the cost of investments (excluding investments in derivatives) was $214,935,550.

Gross unrealized appreciation and gross unrealized depreciation of investments (excluding investments in derivatives) as of June 30, 2014, were as follows:


Gross unrealized:
Appreciation	$22,453,458
Depreciation	(2,237,048)
Net unrealized appreciation (depreciation) of investments	$20,216,410


(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 Directors/Trustees. For fair value measurement disclosure purposes, investment classified as Level 3.
(6)	Investment, or portion of investment, has been pledged to collateralize the net payment obligations for
	investments in inverse floating rate transactions.
(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)	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.
(9)	Effective date represents the date on which both the Fund and Counterparty commence interest payment
	accruals on each contract.
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.
USD-BMA	United States Dollar-Bond Market Association.

Item 2. Controls and Procedures.

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)).

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, 2014

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, 2014

By (Signature and Title) /s/ Stephen D. Foy

Stephen D. Foy

Vice President and Controller (principal financial officer)

Date: August 29, 2014