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, 2018

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, 2018
(Unaudited)
Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    LONG-TERM INVESTMENTS – 98.1%        
    MUNICIPAL BONDS – 98.0%        
    Alaska – 0.3%        
$ 775   Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds, Series 2006A, 5.000%, 6/01/46   8/18 at 100.00 B3 $ 775,000
    Arizona – 2.2%        
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 2,678,525
280   Arizona Industrial Development Authority, Arizona, Education Facility Revenue Bonds, Basis Schools, Inc. Projects, Series 2017D, 3.000%, 7/01/22, 144A   No Opt. Call BB 273,087
255   Arizona Industrial Development Authority, Arizona, Education Facility Revenue Bonds, Basis Schools, Inc. Projects, Series 2017F, 3.000%, 7/01/26   No Opt. Call AA- 250,015
350   Arizona Industrial Development Authority, Arizona, Education Revenue Bonds, Academies of Math & Science Projects, Series 2018A, 4.000%, 7/01/22   No Opt. Call AA- 367,797
270   Maricopa County Industrial Development Authority, Arizona, Education Revenue Bonds, Paradise Schools Projects, Series 2016, 2.875%, 7/01/21, 144A   No Opt. Call BB+ 268,809
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- 1,136,940
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- 666,644
5,280   Total Arizona       5,641,817
    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 1,947,687
    California – 17.1%        
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 2,693,113
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 1,835,861
3,000   Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Series 2013S-4, 5.000%, 4/01/38 (Pre-refunded 4/01/23)   4/23 at 100.00 AA- (4) 3,441,960
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- 2,591,104
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+ 1,825,991
2,745   California State, General Obligation Bonds, Various Purpose Series 2009, 5.000%, 10/01/29   10/19 at 100.00 AA- 2,861,553
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) 1,508,700
1

NXP Nuveen Select Tax-Free Income Portfolio (continued)
  Portfolio of Investments June 30, 2018
  (Unaudited)
Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    California (continued)        
$ 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) $946,024
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 1,510,745
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) 830,688
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+ 2,005,644
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 2,493,902
1,000   Moreno Valley Unified School District, Riverside County, California, General Obligation Bonds, Refunding Series 2007, 0.000%, 8/01/23  –  NPFG Insured   No Opt. Call A+ 884,580
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 959,250
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 N/R (4) 630,958
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- 2,998,853
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) 1,059,848
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- 4,706,160
1,350   San Diego Association of Governments, California, South Bay Expressway Toll Revenue Bonds, First Senior Lien Series 2017A, 5.000%, 7/01/42   7/27 at 100.00 A 1,559,155
1,800   San Francisco City and County Public Utilities Commission, California, Water Revenue Bonds, Non-WSIP, Series 2017A., 5.000%, 11/01/42   11/24 at 100.00 AA- 2,033,676
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 1,509,389
1,195   Tobacco Securitization Authority of Northern California, Tobacco Settlement Asset-Backed Bonds, Series 2005A-1, 5.500%, 6/01/45   8/18 at 100.00 B- 1,196,589
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 791,925
52,795   Total California       42,875,668
    Colorado – 6.2%        
500   Centerra Metropolitan District 1, Loveland, Colorado, Special Revenue Bonds, Refunding & Improvement Series 2017, 5.000%, 12/01/21, 144A   No Opt. Call N/R 536,210
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+ 1,901,627
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- 1,040,190
2,630   Colorado School of Mines Board of Trustees, Golden, Colorado, Institutional Enterprise Revenue Bonds, Series 2017B, 5.000%, 12/01/42   12/27 at 100.00 A+ 3,000,514
2

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Colorado (continued)        
$ 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 $2,125,443
250   E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%, 9/01/29  –  NPFG Insured   No Opt. Call A 170,288
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 5,080,125
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 957,020
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 A 697,010
23,215   Total Colorado       15,508,427
    Connecticut – 3.1%        
2,500   Connecticut State, General Obligation Bonds, Green Series 2014G, 5.000%, 11/15/31   11/24 at 100.00 A1 2,739,150
1,000   Connecticut State, General Obligation Bonds, Refunding Series 2018C, 5.000%, 6/15/26   No Opt. Call A1 1,129,190
1,890   Connecticut State, Special Tax Obligation Bonds, Transportation Infrastructure Purposes Series 2013A, 5.000%, 10/01/32   10/23 at 100.00 AA 2,060,591
1,625   Connecticut State, Special Tax Obligation Bonds, Transportation Infrastructure Purposes, Series 2014A, 5.000%, 9/01/34   9/24 at 100.00 AA 1,767,415
7,015   Total Connecticut       7,696,346
    Guam – 2.1%        
1,500   Government of Guam, Business Privilege Tax Bonds, Refunding Series 2015D, 5.000%, 11/15/39   11/25 at 100.00 A 1,633,755
1,650   Government of Guam, Hotel Occupancy Tax Revenue Bonds, Series 2011A, 6.000%, 11/01/26   5/21 at 100.00 A- 1,789,227
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- 1,927,137
4,890   Total Guam       5,350,119
    Idaho – 1.3%        
3,000   Idaho Health Facilities Authority, Revenue Bonds, Saint Luke's Health System Project, Series 2014A, 5.000%, 3/01/44   3/24 at 100.00 A- 3,229,140
    Illinois – 12.1%        
    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 Baa2 2,445,240
2,000   0.000%, 4/01/23  –  NPFG Insured   No Opt. Call Baa2 1,716,340
725   Chicago Board of Education, Illinois, Dedicated Capital Improvement Tax Revenue Bonds, Series 2016, 6.000%, 4/01/46   4/27 at 100.00 A 850,041
735   Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues Series 2011A, 5.000%, 12/01/41   12/21 at 100.00 BB- 738,168
735   Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues, Refunding Series 2017C, 5.000%, 12/01/30   12/27 at 100.00 BB- 769,236
3

NXP Nuveen Select Tax-Free Income Portfolio (continued)
  Portfolio of Investments June 30, 2018
  (Unaudited)
Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Illinois (continued)        
$ 360   Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues, Series 2016B, 6.500%, 12/01/46   12/26 at 100.00 BB- $412,924
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 Baa2 34,536
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 675,199
880   Chicago, Illinois, General Obligation Bonds, Project & Refunding Series 2017A, 6.000%, 1/01/38   1/27 at 100.00 BBB+ 992,860
    Illinois Finance Authority, Revenue Bonds, Northwestern Memorial HealthCare, Series 2013:        
2,100   4.000%, 8/15/33   8/22 at 100.00 AA+ 2,167,536
2,245   5.000%, 8/15/43   8/22 at 100.00 AA+ 2,430,257
260   Illinois Finance Authority, Revenue Bonds, Rehabilitation Institute of Chicago, Series 2013A, 6.000%, 7/01/43   7/23 at 100.00 A- 289,169
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+ 2,106,384
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) 1,058,010
1,270   Illinois State, General Obligation Bonds, October Series 2016, 5.000%, 2/01/19   No Opt. Call BBB 1,289,025
2,190   Illinois State, General Obligation Bonds, Refunding Series 2012, 5.000%, 8/01/23   No Opt. Call BBB 2,322,714
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 842,330
    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 Baa2 1,049,664
6,070   0.000%, 12/15/31  –  NPFG Insured   No Opt. Call Baa2 3,362,598
5,000   0.000%, 12/15/36  –  NPFG Insured   No Opt. Call Baa2 2,125,750
    Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion Project, Series 2002A.:        
45   0.000%, 6/15/30   No Opt. Call N/R 31,937
765   0.000%, 6/15/30   No Opt. Call BB+ 455,297
1,775   Springfield, Illinois, Electric Revenue Bonds, Senior Lien Series 2015, 5.000%, 3/01/28   3/25 at 100.00 A 1,986,687
310   University of Illinois, Health Services Facilities System Revenue Bonds, Series 2013, 6.000%, 10/01/42   10/23 at 100.00 A- 349,668
36,550   Total Illinois       30,501,570
    Indiana – 1.5%        
2,855   Boone County Hospital Association, Indiana, Lease Revenue Bonds, Series 2010, 5.250%, 7/15/25 (Pre-refunded 1/15/20)   1/20 at 100.00 AA+ (4) 3,007,742
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 (4) 763,223
3,605   Total Indiana       3,770,965
4

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Iowa – 2.7%        
$ 710   Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Series 2016, 5.875%, 12/01/26, 144A   12/19 at 104.00 B $746,089
830   Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Series 2018B, 5.250%, 12/01/50 (Mandatory Put 12/01/22)   12/22 at 105.00 B 884,199
1,000   Iowa Tobacco Settlement Authority, Asset Backed Settlement Revenue Bonds, Series 2005C, 5.375%, 6/01/38   9/18 at 100.00 B+ 1,002,370
4,000   Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B, 5.600%, 6/01/34   9/18 at 100.00 BB- 4,038,760
6,540   Total Iowa       6,671,418
    Kentucky – 1.0%        
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 2,627,275
    Massachusetts – 1.5%        
1,625   Massachusetts Development Finance Agency, Revenue Bonds, Olin College, Series 2013E, 5.000%, 11/01/43   11/23 at 100.00 A+ 1,789,742
400   Massachusetts Development Finance Agency, Revenue Bonds, UMass Memorial Health Care Obligated Group Issue, Series 2017L, 3.625%, 7/01/37   7/27 at 100.00 A- 390,060
1,510   Massachusetts Housing Finance Agency, Housing Bonds, Series 2009F, 5.700%, 6/01/40 (Alternative Minimum Tax)   12/18 at 100.00 AA 1,525,659
3,535   Total Massachusetts       3,705,461
    Michigan – 1.8%        
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 381,810
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) 4,043,800
4,355   Total Michigan       4,425,610
    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 2,418,672
    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+ 363,204
    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 1,032,015
5,000   0.000%, 4/15/30  –  AMBAC Insured   No Opt. Call AA- 3,341,350
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 2,168,960
8,525   Total Missouri       6,905,529
5

NXP Nuveen Select Tax-Free Income Portfolio (continued)
  Portfolio of Investments June 30, 2018
  (Unaudited)
Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Nebraska – 0.2%        
$ 500   Southeast Community College Area, Nebraska, Certificates of Participation, Series 2018, 3.500%, 12/15/42   6/28 at 100.00 Aa1 $ 487,140
    Nevada – 1.6%        
275   Carson City, Nevada, Hospital Revenue Bonds, Carson Tahoe Regional Healthcare Project, Series 2017A, 5.000%, 9/01/37   9/27 at 100.00 BBB+ 305,487
750   Clark County, Nevada, Airport Revenue Bonds, Tender Option Bond Trust 2016-XG0028, 16.163%, 7/01/42, 144A (IF)   1/20 at 100.00 Aa3 932,662
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 1,313,500
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) 1,588,800
3,775   Total Nevada       4,140,449
    New Hampshire – 0.5%        
1,250   New Hampshire Business Finance Authority, Solid Waste Disposal Revenue Bonds, Waste Management Inc. Project, Series 2003., 3.125%, 8/01/24 (Alternative Minimum Tax)   No Opt. Call A- 1,250,688
    New Jersey – 8.7%        
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 1,031,499
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- 1,094,326
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- 1,507,802
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 293,465
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 17,952,200
38,615   Total New Jersey       21,879,292
    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)   9/18 at 100.00 N/R 1,000,570
    New York – 2.2%        
    Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Senior Fiscal 2012 Series 2011A:        
25   5.250%, 2/15/47 (Pre-refunded 2/15/21)   2/21 at 100.00 Aa3 (4) 27,235
475   5.250%, 2/15/47   2/21 at 100.00 AA- 510,501
1,100   Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Refunding Series 2002D-1, 5.000%, 11/01/27   11/22 at 100.00 AA- 1,220,208
2,875   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 2,883,280
6

Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    New York (continued)        
$ 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 $ 855,005
5,255   Total New York       5,496,229
    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 (4) 1,025,970
    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) 2,309,558
    Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue Bonds, Senior Lien, Series 2007A-2:        
1,670   6.000%, 6/01/42   8/18 at 100.00 B- 1,669,983
1,000   6.500%, 6/01/47   8/18 at 100.00 B- 1,025,630
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- 2,064,290
1,500   Montgomery County, Ohio, Revenue Bonds, Miami Valley Hospital, Series 2011A, 5.750%, 11/15/21   11/20 at 100.00 A+ 1,628,265
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 Aa3 1,201,566
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) (6)   No Opt. Call N/R 500,000
10,500   Total Ohio       10,399,292
    Oklahoma – 0.2%        
435   Oklahoma Development Finance Authority, Health System Revenue Bonds, OU Medicine Project, Series 2018B, 5.000%, 8/15/38   8/28 at 100.00 Baa3 485,069
    Oregon – 2.1%        
590   Beaverton School District 48J, Washington and Multnomah Counties, Oregon, General Obligation Bonds, Convertible Deferred Interest Series 2017D, 5.000%, 6/15/36   6/27 at 100.00 AA+ 685,527
515   Clackamas County Hospital Facility Authority, Oregon, Senior Living Revenue Bonds, Willamette View Project, Series 2017A, 4.000%, 11/15/23   No Opt. Call N/R 550,355
500   Lake Oswego, Oregon, General Obligation Bonds, Series 2013, 5.000%, 6/01/26   6/23 at 100.00 AAA 566,820
750   Multnomah County Hospital Facilities Authority, Oregon, Revenue Bond, Terwilliger Plaza, Inc., Refunding Series 2012, 5.000%, 12/01/22   No Opt. Call BBB 819,630
1,365   Oregon Facilities Authority, Revenue Bonds, Reed College, Series 2017A, 4.000%, 7/01/41   7/27 at 100.00 Aa2 1,432,322
1,000   Oregon Facilities Authority, Revenue Bonds, Willamette University, Refunding Series 2016B, 5.000%, 10/01/40   10/26 at 100.00 A 1,137,250
4,720   Total Oregon       5,191,904
    Pennsylvania – 2.0%        
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 1,351,518
7

NXP Nuveen Select Tax-Free Income Portfolio (continued)
  Portfolio of Investments June 30, 2018
  (Unaudited)
Principal Amount (000)   Description (1)   Optional Call Provisions (2) Ratings (3) Value
    Pennsylvania (continued)        
$ 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 $2,129,940
    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) 597,124
295   5.000%, 12/01/30 (Pre-refunded 12/01/20)   12/20 at 100.00 N/R (4) 316,302
640   5.000%, 12/01/30 (Pre-refunded 12/01/20)   12/20 at 100.00 A2 (4) 688,576
4,805   Total Pennsylvania       5,083,460
    Tennessee – 1.3%        
3,000   Metropolitan Nashville Airport Authority, Tennessee, Airport Revenue Bonds, Improvement Series 2015A, 5.000%, 7/01/45   7/25 at 100.00 A+ 3,365,970
    Texas – 9.8%        
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) 274,535
110   Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien, Series 2015A, 5.000%, 1/01/33   7/25 at 100.00 BBB+ 122,030
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) 1,015,710
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 A- 6,235,193
1,250   Harris County Flood Control District, Texas, Contract Tax Bonds, Refunding Series 2017A, 4.000%, 10/01/35   10/27 at 100.00 AAA 1,324,287
3,415   Harris County-Houston Sports Authority, Texas, Revenue Bonds, Junior Lien Series 2001H, 0.000%, 11/15/30  –  NPFG Insured   No Opt. Call Baa2 2,128,399
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 Baa2 1,738,826
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 1,556,816
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 2,406,493
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 2,414,220
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 5,472,500
29,095   Total Texas       24,689,009
    Virginia – 2.4%        
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+ 2,531,060
8

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 $1,080,970
1,205   6.000%, 1/01/37 (Alternative Minimum Tax)   7/22 at 100.00 BBB 1,334,863
1,010   5.500%, 1/01/42 (Alternative Minimum Tax)   7/22 at 100.00 BBB 1,092,911
5,215   Total Virginia       6,039,804
    Washington – 2.5%        
1,280   Port of Seattle, Washington, Revenue Bonds, Refunding First Lien Series 2016A, 5.000%, 10/01/18   No Opt. Call Aa2 1,291,494
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+ 1,055,449
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+ 2,193,424
2,115   Washington State, Motor Vehicle Fuel Tax General Obligation Bonds, Series 2003F, 0.000%, 12/01/27  –  NPFG Insured   No Opt. Call AA+ 1,620,492
6,500   Total Washington       6,160,859
    West Virginia – 0.7%        
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 1,656,315
    Wisconsin – 1.5%        
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- 1,683,135
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 1,745,542
420   Wisconsin, General Obligation Refunding Bonds, Series 2003-3, 5.000%, 11/01/26   9/18 at 100.00 AA+ 421,218
3,565   Total Wisconsin       3,849,895
$ 292,265   Total Municipal Bonds (cost $222,652,630)       246,252,619
    
Principal Amount (000)   Description (1) Coupon Maturity Ratings (3) Value
    CORPORATE BONDS – 0.1%        
    Transportation – 0.1%        
$ 202   Las Vegas Monorail Company, Senior Interest Bonds (7), (8) 5.500% 7/15/19 N/R $130,383
56   Las Vegas Monorail Company, Senior Interest Bonds (7), (8) 5.500% 7/15/55 N/R 28,042
$ 258   Total Corporate Bonds (cost $15,682)       158,425
 
    Total Long-Term Investments (cost $222,668,312)       246,411,044
    Other Assets Less Liabilities – 1.9%       4,875,975
    Net Assets – 100%       $ 251,287,019
9

NXP Nuveen Select Tax-Free Income Portfolio (continued)
  Portfolio of Investments June 30, 2018
  (Unaudited)
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 $ — $246,252,619 $  — $246,252,619
Corporate Bonds  —  — 158,425 158,425
Total $ — $246,252,619 $158,425 $246,411,044
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.
The table below presents the cost and unrealized appreciation (depreciation) of the Fund's investment portfolio, as determined on a federal income tax basis, as of June 30, 2018.
Tax cost of investments $220,926,930
Gross unrealized:  
Appreciation $ 26,358,986
Depreciation (874,872)
Net unrealized appreciation (depreciation) of investments $ 25,484,114
10

(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.  
(5) Step-up coupon bond, a bond with a coupon that increases ("steps up"), usually at regular intervals, while the bond is outstanding. The rate shown is the coupon as of the end of the reporting period.  
(6) As of, or subsequent to, the end of the reporting period, this security is non-income producing. Non-income producing, in the case of a fixed-income security, generally denotes that the issuer has (1) defaulted on the payment of principal or interest, (2) is under the protection of the Federal Bankruptcy Court or (3) the Fund’s Adviser has concluded that the issue is not likely to meet its future interest payment obligations and has ceased accruing additional income on the Fund’s records.  
(7) During January 2010, Las Vegas Monorail Company (“Las Vegas Monorail”) filed for federal bankruptcy protection. During March 2012, Las Vegas Monorail emerged from federal bankruptcy with the acceptance of a reorganization plan assigned by the Federal Bankruptcy Court. Under the reorganization plan, the Fund surrendered its Las Vegas Monorail Project Revenue Bonds, First Tier, Series 2000 and in turn received two senior interest corporate bonds: the first with an annual coupon rate of 5.500% maturing on July 15, 2019 and the second with an annual coupon rate of 3.000% (5.500% after December 31, 2015) maturing on July 15, 2055. The Fund 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.  
(8) 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.  
144A Investment is exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These investments may only be resold in transactions exempt from registration, which are normally those transactions with qualified institutional buyers.  
ETM Escrowed to maturity.  
IF Inverse floating rate security issued by a tender option bond (“TOB”) trust, the interest rate on which varies inversely with the Securities Industry Financial Markets Association (SIFMA) short-term rate, which resets weekly, or a similar short-term rate, and is reduced by the expenses related to the TOB trust.  
11

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, 2018

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, 2018      
By (Signature and Title)    /s/ Stephen D. Foy                                                                    
   Stephen D. Foy   
   Vice President and Controller (principal financial officer)   
Date: August 29, 2018