Nuveen Select Tax-Free Income Portfolio

 

 

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)

Gifford R. Zimmerman

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: March 31      

Date of reporting period: June 30, 2017

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

 

 

NXP
Nuveen Select Tax-Free Income Portfolio
Portfolio of Investments June 30, 2017 (Unaudited)
Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    LONG-TERM INVESTMENTS – 98.2%        
    MUNICIPAL BONDS – 98.2%        
    Alaska – 1.0%        
$ 2,675   Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds, Series 2006A, 5.000%, 6/01/46   9/17 at 100.00 B3 $ 2,593,760
    Arizona – 3.0%        
2,500   Arizona Health Facilities Authority, Hospital Revenue Bonds, Catholic Healthcare West, Series 2011B-1&2, 5.250%, 3/01/39   3/21 at 100.00 A 2,706,625
2,530   Arizona Water Infrastructure Finance Authority, Water Quality Revenue Bonds, Series 2008A, 5.000%, 10/01/20   10/18 at 100.00 AAA 2,656,121
355   Maricopa County Industrial Development Authority, Arizona, Education Revenue Bonds, Paradise Schools Projects, Series 2016, 2.875%, 7/01/21   No Opt. Call BB+ 347,900
1,000   Maricopa County Industrial Development Authority, Arizona, Revenue Bonds, Banner Health, Refunding Series 2016A, 5.000%, 1/01/38   1/27 at 100.00 AA- 1,158,920
625   Pima County Industrial Development Authority, Arizona, Revenue Bonds, Tucson Electric Power Company, Series 2010A, 5.250%, 10/01/40   10/20 at 100.00 A- 670,850
7,010   Total Arizona       7,540,416
    Arkansas – 0.8%        
6,555   Arkansas Development Finance Authority, Tobacco Settlement Revenue Bonds, Arkansas Cancer Research Center Project, Series 2006, 0.000%, 7/01/46  –  AMBAC Insured   No Opt. Call Aa2 1,878,925
    California – 18.8%        
2,000   Alameda Corridor Transportation Authority, California, Revenue Bonds, Refunding Subordinate Lien Series 2004A, 5.450%, 10/01/25 (Pre-refunded 10/01/17)  –  AMBAC Insured   10/17 at 100.00 Aaa (4) 2,023,360
4,245   Anaheim City School District, Orange County, California, General Obligation Bonds, Election 2002 Series 2007, 0.000%, 8/01/31  –  AGM Insured   No Opt. Call AA 2,651,172
2,840   Anaheim Public Financing Authority, California, Lease Revenue Bonds, Public Improvement Project, Series 1997C, 0.000%, 9/01/30  –  AGM Insured   No Opt. Call AA 1,758,074
3,000   Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Series 2013S-4, 5.000%, 4/01/38   4/23 at 100.00 AA- 3,425,340
2,310   California Health Facilities Financing Authority, Revenue Bonds, Saint Joseph Health System, Series 2013A, 5.000%, 7/01/33   7/23 at 100.00 AA- 2,636,957
1,630   California State Public Works Board, Lease Revenue Bonds, Various Capital Projects, Series 2013I, 5.000%, 11/01/38   11/23 at 100.00 A+ 1,853,033
2,745   California State, General Obligation Bonds, Various Purpose Series 2009, 5.000%, 10/01/29   10/19 at 100.00 AA- 2,981,866
1,500   California Statewide Community Development Authority, Health Revenue Bonds, Enloe Medical Center, Refunding Series 2008A, 6.250%, 8/15/28 (Pre-refunded 8/15/18)   8/18 at 100.00 AA- (4) 1,590,435
895   California Statewide Community Development Authority, Revenue Bonds, Methodist Hospital Project, Series 2009, 6.750%, 2/01/38 (Pre-refunded 8/01/19)   8/19 at 100.00 N/R (4) 1,000,279

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    California (continued)        
$ 2,645   Cypress Elementary School District, Orange County, California, General Obligation Bonds, Series 2009A, 0.000%, 5/01/34  –  AGM Insured   No Opt. Call AA $1,433,881
800   East Side Union High School District, Santa Clara County, California, General Obligation Bonds, 2008 Election Series 2010B, 5.000%, 8/01/24 (Pre-refunded 8/01/19)  –  AGC Insured   8/19 at 100.00 AA (4) 866,328
2,710   Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement Asset-Backed Revenue Bonds, Series 2005A, 0.000%, 6/01/28  –  AMBAC Insured   No Opt. Call A+ 1,946,376
2,350   Golden Valley Unified School District, Madera County, California, General Obligation Bonds, Election 2006 Series 2007A, 0.000%, 8/01/29  –  AGM Insured   8/17 at 56.07 AA 1,316,117
3,030   Grossmont Union High School District, San Diego County, California, General Obligation Bonds, Series 2006, 0.000%, 8/01/25  –  NPFG Insured   No Opt. Call Aa2 2,526,202
1,000   Moreno Valley Unified School District, Riverside County, California, General Obligation Bonds, Series 2007, 0.000%, 8/01/23  –  NPFG Insured   No Opt. Call A+ 884,420
1,160   Mount San Antonio Community College District, Los Angeles County, California, General Obligation Bonds, Election of 2008, Series 2013A, 0.000%, 8/01/43 (5)   8/35 at 100.00 Aa1 902,608
5,395   Napa Valley Community College District, Napa and Sonoma Counties, California, General Obligation Bonds, Election 2002 Series 2007C, 0.000%, 8/01/32  –  NPFG Insured   8/17 at 46.57 Aa2 2,508,891
590   Palomar Pomerado Health Care District, California, Certificates of Participation, Series 2009, 6.750%, 11/01/39 (Pre-refunded 11/01/19)   11/19 at 100.00 Ba1 (4) 668,128
4,390   Pittsburg Redevelopment Agency, California, Tax Allocation Bonds, Los Medanos Community Development Project, Series 1999, 0.000%, 8/01/29  –  AMBAC Insured   No Opt. Call AA- 2,874,045
1,700   Placentia-Yorba Linda Unified School District, Orange County, California, Certificates of Participation, Series 2006, 0.000%, 10/01/34  –  NPFG Insured (ETM)   No Opt. Call A+ (4) 1,064,829
2,480   Port of Oakland, California, Revenue Bonds, Refunding Inter Lien Series 2007B, 5.000%, 11/01/19 (Pre-refunded 11/01/17)  –  NPFG Insured   11/17 at 100.00 A (4) 2,514,670
8,000   Poway Unified School District, San Diego County, California, General Obligation Bonds, School Facilities Improvement District 2007-1, Election 2008 Series 2009A, 0.000%, 8/01/33   No Opt. Call AA- 4,442,720
2,110   Sierra Sands Unified School District, Kern County, California, General Obligation Bonds, Election of 2006, Series 2006A, 0.000%, 11/01/28  –  FGIC Insured   No Opt. Call AA 1,514,199
1,195   Tobacco Securitization Authority of Northern California, Tobacco Settlement Asset-Backed Bonds, Series 2005A-1, 5.500%, 6/01/45   9/17 at 100.00 B- 1,187,687
1,150   Woodside Elementary School District, San Mateo County, California, General Obligation Bonds, Election of 2005, Series 2007, 0.000%, 10/01/30  –  AMBAC Insured   No Opt. Call AAA 771,742
61,870   Total California       47,343,359
    Colorado – 4.8%        
500   Centerra Metropolitan District 1, Loveland, Colorado, Special Revenue Bonds, Refunding & Improvement Series 2017, 5.000%, 12/01/21   No Opt. Call N/R 543,335
1,780   Colorado Health Facilities Authority, Colorado, Revenue Bonds, Catholic Health Initiatives, Series 2013A, 5.250%, 1/01/45   1/23 at 100.00 BBB+ 1,880,819
1,000   Colorado Health Facilities Authority, Colorado, Revenue Bonds, Sisters of Charity of Leavenworth Health Services Corporation, Series 2010A, 5.000%, 1/01/40   1/20 at 100.00 AA- 1,070,350
1,935   Denver City and County, Colorado, Airport System Revenue Bonds, Subordinate Lien Series 2013B, 5.000%, 11/15/43   11/23 at 100.00 A 2,161,550
250   E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%, 9/01/29  –  NPFG Insured   No Opt. Call A 167,627

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Colorado (continued)        
$ 12,500   E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2006A, 0.000%, 9/01/38  –  NPFG Insured   9/26 at 54.77 A $4,750,875
2,000   E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, Series 2004B, 0.000%, 9/01/32  –  NPFG Insured   9/20 at 50.83 A 926,840
620   Park Creek Metropolitan District, Colorado, Senior Limited Property Tax Supported Revenue Bonds, Refunding Series 2015A, 5.000%, 12/01/35   12/25 at 100.00 BBB 681,839
20,585   Total Colorado       12,183,235
    Guam – 1.4%        
1,500   Government of Guam, Business Privilege Tax Bonds, Refunding Series 2015D, 5.000%, 11/15/39   11/25 at 100.00 A 1,617,975
1,740   Guam Government Waterworks Authority, Water and Wastewater System Revenue Bonds, Series 2013, 5.250%, 7/01/25   7/23 at 100.00 A- 1,992,700
3,240   Total Guam       3,610,675
    Illinois – 10.6%        
    Board of Trustees of Southern Illinois University, Housing and Auxiliary Facilities System Revenue Bonds, Series 1999A:        
2,565   0.000%, 4/01/20  –  NPFG Insured   No Opt. Call A 2,405,560
2,000   0.000%, 4/01/23  –  NPFG Insured   No Opt. Call A 1,693,780
725   Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Capital Improvement Revenues, Series 2016, 6.000%, 4/01/46   4/27 at 100.00 A 764,324
735   Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues Series 2011A, 5.000%, 12/01/41   12/21 at 100.00 B+ 579,209
360   Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues, Series 2016B, 6.500%, 12/01/46   12/26 at 100.00 B+ 335,966
55   Chicago Board of Education, Illinois, Unlimited Tax General Obligation Bonds, Dedicated Tax Revenues, Series 1998B-1, 0.000%, 12/01/28  –  FGIC Insured   No Opt. Call A 32,072
645   Chicago, Illinois, General Airport Revenue Bonds, O'Hare International Airport, Senior Lien Refunding Series 2016C, 5.000%, 1/01/20   No Opt. Call A 704,082
880   Chicago, Illinois, General Obligation Bonds, Project & Refunding Series 2017A, 6.000%, 1/01/38   1/27 at 100.00 BBB+ 906,321
2,100   Illinois Finance Authority, Revenue Bonds, Northwestern Memorial HealthCare, Series 2013, 4.000%, 8/15/33   8/22 at 100.00 AA+ 2,183,811
260   Illinois Finance Authority, Revenue Bonds, Rehabilitation Institute of Chicago, Series 2013A, 6.000%, 7/01/43   7/23 at 100.00 A- 300,087
2,100   Illinois Finance Authority, Revenue Bonds, Silver Cross Hospital and Medical Centers, Refunding Series 2008A, 5.500%, 8/15/30   8/18 at 100.00 BBB+ 2,160,669
1,000   Illinois Finance Authority, Revenue Bonds, Silver Cross Hospital and Medical Centers, Series 2009, 6.875%, 8/15/38 (Pre-refunded 8/15/19)   8/19 at 100.00 N/R (4) 1,119,880
1,270   Illinois State, General Obligation Bonds, October Series 2016, 5.000%, 2/01/19   No Opt. Call BBB 1,308,087
2,190   Illinois State, General Obligation Bonds, Refunding Series 2012, 5.000%, 8/01/23   No Opt. Call BBB 2,288,156
1,000   Kendall, Kane, and Will Counties Community Unit School District 308 Oswego, Illinois, General Obligation Bonds, Series 2008, 0.000%, 2/01/24  –  AGM Insured   No Opt. Call Aa3 844,320

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Illinois (continued)        
    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 A $996,224
810   0.000%, 6/15/30  –  NPFG Insured   No Opt. Call A 455,690
6,070   0.000%, 12/15/31  –  NPFG Insured   No Opt. Call A 3,160,588
5,000   0.000%, 12/15/36  –  NPFG Insured   No Opt. Call A 1,966,050
1,775   Springfield, Illinois, Electric Revenue Bonds, Senior Lien Series 2015, 5.000%, 3/01/28   3/25 at 100.00 A 2,049,415
310   University of Illinois, Health Services Facilities System Revenue Bonds, Series 2013, 6.000%, 10/01/42   10/23 at 100.00 A 355,415
33,570   Total Illinois       26,609,706
    Indiana – 1.7%        
2,855   Boone County Hospital Association, Indiana, Lease Revenue Bonds, Series 2010, 5.250%, 7/15/25   1/20 at 100.00 AA+ 3,129,765
270   Indiana Finance Authority, Tax-Exempt Private Activity Revenue Bonds, I-69 Section 5 Project, Series 2014, 5.250%, 9/01/34 (Alternative Minimum Tax)   9/24 at 100.00 CCC- 287,499
750   Purdue University, Indiana, University Revenue Bonds, Student Facility System Series 2009A, 5.000%, 7/01/23 (Pre-refunded 1/01/19)   1/19 at 100.00 AAA 794,175
3,875   Total Indiana       4,211,439
    Iowa – 2.6%        
830   Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Series 2013, 5.000%, 12/01/19   No Opt. Call B 851,671
710   Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Series 2016, 5.875%, 12/01/26   6/18 at 105.00 B 730,377
1,000   Iowa Tobacco Settlement Authority, Asset Backed Settlement Revenue Bonds, Series 2005C, 5.375%, 6/01/38   9/17 at 100.00 B+ 1,000,060
4,000   Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B, 5.600%, 6/01/34   9/17 at 100.00 B+ 4,000,200
6,540   Total Iowa       6,582,308
    Kentucky – 1.1%        
2,500   Kentucky Economic Development Finance Authority, Hospital Revenue Bonds, Baptist Healthcare System Obligated Group, Series 2011, 5.250%, 8/15/46   8/21 at 100.00 A 2,663,625
    Massachusetts – 1.6%        
1,625   Massachusetts Development Finance Agency, Revenue Bonds, Olin College, Series 2013E, 5.000%, 11/01/43   11/23 at 100.00 A+ 1,837,225
500   Massachusetts Health and Educational Facilities Authority, Revenue Bonds, CareGroup Inc., Series 2008E-1 &2, 5.000%, 7/01/28 (Pre-refunded 7/01/18)   7/18 at 100.00 A- (4) 520,470
1,540   Massachusetts Housing Finance Agency, Housing Bonds, Series 2009F, 5.700%, 6/01/40 (Alternative Minimum Tax)   12/18 at 100.00 AA 1,582,150
3,665   Total Massachusetts       3,939,845
    Michigan – 3.3%        
355   Detroit Water and Sewerage Department, Michigan, Sewage Disposal System Revenue Bonds, Refunding Senior Lien Series 2012A, 5.250%, 7/01/39   7/22 at 100.00 A 394,462
1,500   Detroit, Michigan, Sewer Disposal System Revenue Bonds, Second Lien, Series 2001E, 5.750%, 7/01/31 (Pre-refunded 7/01/18)  –  BHAC Insured   7/18 at 100.00 AA+ (4) 1,571,535

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Michigan (continued)        
$ 2,000   Portage Public Schools, Kalamazoo County, Michigan, General Obligation Bonds, School Building & Site Series 2008, 5.000%, 5/01/21 (Pre-refunded 5/01/18)  –  AGM Insured   5/18 at 100.00 AA (4) $2,068,480
4,000   Royal Oak Hospital Finance Authority, Michigan, Hospital Revenue Bonds, William Beaumont Hospital, Refunding Series 2009V, 8.250%, 9/01/39 (Pre-refunded 9/01/18)   9/18 at 100.00 Aaa 4,338,360
7,855   Total Michigan       8,372,837
    Minnesota – 0.7%        
1,725   Saint Paul Housing and Redevelopment Authority, Minnesota, Health Care Revenue Bonds, Allina Health System, Series 2007A, 5.000%, 11/15/19  –  NPFG Insured   11/17 at 100.00 AA- 1,751,151
    Mississippi – 1.0%        
2,400   Warren County, Mississippi, Gulf Opportunity Zone Revenue Bonds, International Paper Company Project, Series 2008A, 6.500%, 9/01/32   9/18 at 100.00 BBB 2,537,232
    Missouri – 2.7%        
360   Bi-State Development Agency of the Missouri-Illinois Metropolitan District, Mass Transit Sales Tax Appropriation Bonds, Refunding Combined Lien Series 2013A, 5.000%, 10/01/28   10/18 at 100.00 AA+ 377,669
    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 1,035,580
5,000   0.000%, 4/15/30  –  AMBAC Insured   No Opt. Call AA- 3,271,600
2,000   Missouri Health and Educational Facilities Authority, Health Facilities Revenue Bonds, CoxHealth, Series 2013A, 5.000%, 11/15/38   11/23 at 100.00 A2 2,214,560
8,525   Total Missouri       6,899,409
    Nevada – 1.6%        
750   Clark County, Nevada, Airport Revenue Bonds, Tender Option Bond Trust 2016-XG0028, 17.813%, 7/01/42 (IF)   1/20 at 100.00 A+ 1,083,990
1,250   Clark County, Nevada, Passenger Facility Charge Revenue Bonds, Las Vegas-McCarran International Airport, Series 2010A, 5.250%, 7/01/42   1/20 at 100.00 Aa3 1,351,238
1,500   Las Vegas Redevelopment Agency, Nevada, Tax Increment Revenue Bonds, Series 2009A, 8.000%, 6/15/30 (Pre-refunded 6/15/19)   6/19 at 100.00 BBB+ (4) 1,698,555
3,500   Total Nevada       4,133,783
    New Jersey – 10.0%        
940   New Jersey Economic Development Authority, Private Activity Bonds, The Goethals Bridge Replacement Project, Series 2013, 5.125%, 1/01/39  –  AGM Insured (Alternative Minimum Tax)   1/24 at 100.00 AA 1,044,133
2,550   New Jersey Economic Development Authority, Revenue Bonds, Motor Vehicle Surcharge, Series 2004A, 5.250%, 7/01/33  –  NPFG Insured   9/17 at 100.00 A 2,604,417
1,035   New Jersey Economic Development Authority, School Facilities Construction Financing Program Bonds, Refunding Series 2011GG, 5.000%, 9/01/22   3/21 at 100.00 A- 1,088,095
1,380   New Jersey Economic Development Authority, Sublease Revenue Bonds, New Jersey Transit Corporation Projects, Refunding Series 2017B, 5.000%, 11/01/23   No Opt. Call A- 1,483,376
260   New Jersey Health Care Facilities Financing Authority, Revenue Bonds, University Hospital Issue, Refunding Series 2015A, 5.000%, 7/01/29  –  AGM Insured   7/25 at 100.00 AA 297,651
35,000   New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Refunding Series 2006C, 0.000%, 12/15/34  –  AGM Insured   No Opt. Call AA 16,301,250

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    New Jersey (continued)        
$ 2,500   Tobacco Settlement Financing Corporation, New Jersey, Tobacco Settlement Asset-Backed Bonds, Series 2007-1A, 5.000%, 6/01/41   9/17 at 100.00 B $ 2,466,925
43,665   Total New Jersey       25,285,847
    New Mexico – 0.4%        
1,000   New Mexico Mortgage Finance Authority, Multifamily Housing Revenue Bonds, St Anthony, Series 2007A, 5.250%, 9/01/42 (Alternative Minimum Tax)   9/17 at 100.00 N/R 1,001,440
    New York – 3.0%        
500   Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Senior Fiscal 2012 Series 2011A, 5.250%, 2/15/47   2/21 at 100.00 AA- 557,075
2,285   New York City Municipal Water Finance Authority, New York, Water and Sewer System Revenue Bonds, Fiscal 2009 Series 2008A, 5.750%, 6/15/40   6/18 at 100.00 AAA 2,393,423
3,625   New York City Transitional Finance Authority, New York, Building Aid Revenue Bonds, Fiscal Series 2009-S1, 5.500%, 7/15/31   7/18 at 100.00 AA 3,797,550
780   Port Authority of New York and New Jersey, Special Project Bonds, JFK International Air Terminal LLC Project, Eighth Series 2010, 6.000%, 12/01/42   12/20 at 100.00 Baa1 877,243
7,190   Total New York       7,625,291
    North Carolina – 0.4%        
1,000   North Carolina Eastern Municipal Power Agency, Power System Revenue Bonds, Series 2008C, 6.750%, 1/01/24 (Pre-refunded 1/01/19)   1/19 at 100.00 AAA 1,085,550
    Ohio – 4.1%        
2,250   American Municipal Power Ohio Inc., Prairie State Energy Campus Project Revenue Bonds, Series 2009A, 5.750%, 2/15/39 (Pre-refunded 2/15/19)  –  AGC Insured   2/19 at 100.00 AA (4) 2,422,012
    Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue Bonds, Senior Lien, Series 2007A-2:        
1,670   6.000%, 6/01/42   9/17 at 100.00 B- 1,650,127
1,000   6.500%, 6/01/47   9/17 at 100.00 B- 999,860
1,975   Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue Bonds, Senior Lien, Series 2007A-3, 6.250%, 6/01/37   6/22 at 100.00 B- 1,992,558
1,500   Montgomery County, Ohio, Revenue Bonds, Miami Valley Hospital, Series 2011A, 5.750%, 11/15/21   11/20 at 100.00 A+ 1,707,945
1,105   Ohio Turnpike Commission, Turnpike Revenue Bonds, Infrastructure Project, Junior Lien Series 2013A-1, 5.000%, 2/15/48   2/23 at 100.00 A+ 1,236,738
1,000   Ohio Water Development Authority, Pollution Control Revenue Refunding Bonds, FirstEnergy Nuclear Generating Corporation Project, Series 2005B, 4.000%, 1/01/34 (Mandatory Put 7/01/21)   No Opt. Call Caa1 425,000
10,500   Total Ohio       10,434,240
    Oregon – 1.3%        
885   Beaverton School District 48J, Washington and Multnomah Counties, Oregon, General Obligation Bonds, Convertible Deferred Interest Series 2017D, 0.000%, 6/15/36   6/27 at 100.00 AA+ 993,908
580   Oregon Facilities Authority, Revenue Bonds, Legacy Health Project, Refunding Series 2016A, 5.000%, 6/01/46   6/26 at 100.00 AA- 657,071
1,500   Oregon Facilities Authority, Revenue Bonds, Willamette University, Refunding Series 2016B, 5.000%, 10/01/40   10/26 at 100.00 A 1,730,265
2,965   Total Oregon       3,381,244

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Pennsylvania – 3.2%        
$ 1,225   Delaware River Port Authority, New Jersey and Pennsylvania, Revenue Bonds, Series 2013, 5.000%, 1/01/37   1/24 at 100.00 A $1,383,429
2,090   Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, Carnegie Mellon University, Series 2009, 5.000%, 8/01/21   2/19 at 100.00 AA 2,218,180
    Pennsylvania Turnpike Commission, Motor License Fund-Enhanced Subordinate Special Revenue Bonds, Series 2010B-2:        
555   5.000%, 12/01/30 (Pre-refunded 12/01/20)   12/20 at 100.00 N/R (4) 626,673
935   5.000%, 12/01/30   12/20 at 100.00 AA- 1,019,066
2,460   Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Senior Lien Series 2012A, 5.000%, 12/01/42   12/22 at 100.00 A1 2,750,870
7,265   Total Pennsylvania       7,998,218
    Texas – 9.4%        
250   Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2011, 6.000%, 1/01/41 (Pre-refunded 1/01/21)   1/21 at 100.00 BBB+ (4) 290,480
110   Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien, Series 2015A, 5.000%, 1/01/33   7/25 at 100.00 BBB+ 126,223
1,000   Dallas Area Rapid Transit, Texas, Sales Tax Revenue Bonds, Senior Lien Series 2008, 5.250%, 12/01/48 (Pre-refunded 12/01/18)   12/18 at 100.00 AA+ (4) 1,060,300
5,565   Grand Parkway Transportation Corporation, Texas, System Toll Revenue Bonds, First Tier Series 2013A, 5.500%, 4/01/53   10/23 at 100.00 BBB+ 6,352,559
3,415   Harris County-Houston Sports Authority, Texas, Revenue Bonds, Junior Lien Series 2001H, 0.000%, 11/15/30  –  NPFG Insured   No Opt. Call A 2,007,678
4,230   Harris County-Houston Sports Authority, Texas, Revenue Bonds, Third Lien Series 2004A-3, 0.000%, 11/15/35  –  NPFG Insured   11/24 at 52.47 A 1,674,699
4,015   Harris County-Houston Sports Authority, Texas, Special Revenue Bonds, Refunding Senior Lien Series 2001A, 0.000%, 11/15/38  –  NPFG Insured   11/30 at 61.17 AA 1,493,138
2,260   Love Field Airport Modernization Corporation, Texas, Special Facilities Revenue Bonds, Southwest Airlines Company, Series 2010, 5.250%, 11/01/40   11/20 at 100.00 A3 2,475,514
2,000   North Texas Tollway Authority, System Revenue Bonds, Refunding First Tier Capital Appreciation Series 2008I, 6.500%, 1/01/43   1/25 at 100.00 A1 2,494,580
5,000   Texas Municipal Gas Acquisition and Supply Corporation III, Gas Supply Revenue Bonds, Series 2012, 5.000%, 12/15/26   12/22 at 100.00 A3 5,628,600
27,845   Total Texas       23,603,771
    Virginia – 3.9%        
1,000   Fairfax County Economic Development Authority, Virginia, Residential Care Facilities Mortgage Revenue Bonds, Goodwin House, Inc., Series 2007A, 5.125%, 10/01/42 (Pre-refunded 10/01/17)   10/17 at 100.00 BBB (4) 1,010,960
2,000   Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Revenue Bonds, Dulles Metrorail Capital Appreciation, Second Senior Lien Series 2010B, 0.000%, 10/01/44 (5)   10/28 at 100.00 BBB+ 2,324,300
1,500   Virginia Public Building Authority, Public Facilities Revenue Bonds, Series 2009B, 5.000%, 8/01/17   No Opt. Call AA+ 1,505,520

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Virginia (continued)        
    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 $1,087,570
1,205   6.000%, 1/01/37 (Alternative Minimum Tax)   7/22 at 100.00 BBB 1,360,722
1,010   5.500%, 1/01/42 (Alternative Minimum Tax)   7/22 at 100.00 BBB 1,109,798
1,390   Virginia Small Business Financing Authority, Wellmont Health System Project Revenue Bonds, Series 2007A, 5.250%, 9/01/37   9/17 at 100.00 BBB+ 1,396,283
9,105   Total Virginia       9,795,153
    Washington – 2.9%        
1,280   Port of Seattle, Washington, Revenue Bonds, Refunding First Lien Series 2016A, 5.000%, 10/01/18   No Opt. Call Aa2 1,344,218
990   Washington Health Care Facilities Authority, Revenue Bonds, Fred Hutchinson Cancer Research Center, Series 2011A, 5.625%, 1/01/35   1/21 at 100.00 A 1,079,932
2,115   Washington State Health Care Facilities Authority, Revenue Bonds, PeaceHealth, Refunding Series 2009, 5.000%, 11/01/28   11/19 at 100.00 A+ 2,253,892
1,000   Washington State, General Obligation Motor Vehicle Fuel Tax Bonds, Series 2008D, 5.000%, 1/01/33 (Pre-refunded 1/01/18)   1/18 at 100.00 AA+ (4) 1,021,030
2,115   Washington State, Motor Vehicle Fuel Tax General Obligation Bonds, Series 2003F, 0.000%, 12/01/27  –  NPFG Insured   No Opt. Call AA+ 1,642,572
7,500   Total Washington       7,341,644
    West Virginia – 1.3%        
1,500   West Virginia Hospital Finance Authority, Hospital Revenue Bonds, West Virginia United Health System Obligated Group, Refunding & Improvement Series 2013A, 5.500%, 6/01/44   6/23 at 100.00 A 1,697,625
1,500   West Virginia State School Building Authority, Capital Improvement Revenue Bonds, Series 2007A, 5.000%, 7/01/20  –  NPFG Insured   7/17 at 100.00 Aa3 1,505,415
3,000   Total West Virginia       3,203,040
    Wisconsin – 1.6%        
1,500   Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Medical College of Wisconsin, Inc., Series 2016, 5.000%, 12/01/41   11/26 at 100.00 AA- 1,715,055
1,645   Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Mercy Alliance, Inc., Series 2012, 5.000%, 6/01/39   6/22 at 100.00 A3 1,763,259
490   Wisconsin, General Obligation Refunding Bonds, Series 2003-3, 5.000%, 11/01/26   9/17 at 100.00 AA 491,666
3,635   Total Wisconsin       3,969,980
$ 300,760   Total Municipal Bonds (cost $221,668,520)       247,577,123
    

Principal Amount (000)   Description (1) Coupon Maturity Ratings (3) Value
    CORPORATE BONDS – 0.0%        
    Transportation – 0.0%        
$ 208   Las Vegas Monorail Company, Senior Interest Bonds (6), (7) 5.500% 7/15/19 N/R $130,514
56   Las Vegas Monorail Company, Senior Interest Bonds (6), (7) 5.500% 7/15/55 N/R 28,172
$ 264   Total Corporate Bonds (cost $22,194)       158,686
    Total Long-Term Investments (cost $221,690,714)       247,735,809
    Other Assets Less Liabilities – 1.8%       4,423,076
    Net Assets – 100%       $ 252,158,885
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 $ — $247,577,123 $  — $247,577,123
Corporate Bonds  —  — 158,686 158,686
Total $ — $247,577,123 $158,686 $247,735,809
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, 2017, the cost of investments was $219,958,554.
Gross unrealized appreciation and gross unrealized depreciation of investments as of June 30, 2017, were as follows:
Gross unrealized:  
Appreciation $28,530,472
Depreciation (753,217)
Net unrealized appreciation (depreciation) of investments $27,777,255

(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) For financial reporting purposes, the ratings disclosed are the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service, Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. 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) Step-up coupon. The rate shown is the coupon as of the end of the reporting period.  
(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 was not accruing income for either senior interest corporate bond. On January 18, 2017, the Fund's Adviser determined it was likely that this senior interest corporate bond would fulfill its obligation on the security maturing on July 15, 2019, and therefore began accruing income on the Fund's records.  
(7) 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.  
(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/ Gifford R. Zimmerman                                                       
   Gifford R. Zimmerman   
   Vice President and Secretary   

Date: August 29, 2017

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/ Cedric H. Antosiewicz                                                        
   Cedric H. Antosiewicz   
   Chief Administrative Officer (principal executive officer)   
Date: August 29, 2017      
By (Signature and Title)    /s/ Stephen D. Foy                                                                    
   Stephen D. Foy   
   Vice President and Controller (principal financial officer)   
Date: August 29, 2017