0001752724-24-045210.txt : 20240228 0001752724-24-045210.hdr.sgml : 20240228 20240228105456 ACCESSION NUMBER: 0001752724-24-045210 CONFORMED SUBMISSION TYPE: NPORT-P PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20231231 FILED AS OF DATE: 20240228 DATE AS OF CHANGE: 20240228 PERIOD START: 20240331 FILER: COMPANY DATA: COMPANY CONFORMED NAME: NUVEEN SELECT TAX FREE INCOME PORTFOLIO CENTRAL INDEX KEY: 0000883618 ORGANIZATION NAME: IRS NUMBER: 363806843 FISCAL YEAR END: 0331 FILING VALUES: FORM TYPE: NPORT-P SEC ACT: 1940 Act SEC FILE NUMBER: 811-06548 FILM NUMBER: 24691748 BUSINESS ADDRESS: STREET 1: 333 W WACKER DR CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3129178200 MAIL ADDRESS: STREET 1: 333 W WACKER DR CITY: CHICAGO STATE: IL ZIP: 60606 NPORT-P 1 primary_doc.xml NPORT-P false 0000883618 XXXXXXXX Nuveen Select Tax-Free Income Portfolio 811-06548 0000883618 5493005XMO16VD219F88 333 W. 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Health, Series 2019A-2 19648FKT0 540000.00000000 PA USD 518742.52000000 0.073652173407 Long DBT MUN US N 2 2049-08-01 Fixed 4.00000000 N N N N N N New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2015AA 549300YUVD5TEXR6L889 New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2015AA 646136X48 2000000.00000000 PA USD 2063157.60000000 0.292931532432 Long DBT MUN US N 2 2029-06-15 Fixed 5.25000000 N N N N N N Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Refunding Series 2022 549300NQVL49BTHOW391 Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Refunding Series 2022 46246SAV7 1165000.00000000 PA USD 1216024.90000000 0.172653818318 Long DBT MUN US N 2 2050-12-01 Fixed 5.00000000 N N N N N N Texas Turnpike Authority, Central Texas Turnpike System Revenue Bonds, First Tier Series 2002A N/A Texas Turnpike Authority, Central Texas Turnpike System Revenue Bonds, First Tier Series 2002A 882762AP2 2410000.00000000 PA USD 2285579.41000000 0.324511457130 Long DBT MUN US N 2 2025-08-15 Fixed 0.00000000 N N N N N N Palmdale School District, Los Angeles County, California, General Obligation Bonds, Series 2003 549300YBE1L2RGBY7L18 Palmdale School District, Los Angeles County, California, General Obligation Bonds, Series 2003 696735KE8 1195000.00000000 PA USD 1048590.03000000 0.148881057065 Long DBT MUN US N 2 2028-08-01 Fixed 0.00000000 N N N N N N University of Massachusetts Building Authority, Project Revenue Bonds, Senior Series 2014-1 6ILE2573NPR1XO2TR556 University of Massachusetts Building Authority, Project Revenue Bonds, Senior Series 2014-1 914440SV5 210000.00000000 PA USD 213457.15000000 0.030307103082 Long DBT MUN US N 2 2039-11-01 Fixed 5.00000000 N N N N N N Main Street Natural Gas Inc., Georgia, Gas Supply Revenue Bonds, Series 2023D 549300NY5M0QVZ6X4U26 Main Street Natural Gas Inc., Georgia, Gas Supply Revenue Bonds, Series 2023D 56035DFT4 3775000.00000000 PA USD 4017211.93000000 0.570372349043 Long DBT MUN US N 2 2054-12-01 Fixed 5.00000000 N N N N N N Harris County Cultural Education Facilities Finance Corporation, Texas, Revenue Bonds, Houston Methodist Hospital System, Series 2015 N/A Harris County Cultural Education Facilities Finance Corporation, Texas, Revenue Bonds, Houston Methodist Hospital System, Series 2015 414009KE9 1160000.00000000 PA USD 1176275.50000000 0.167010113419 Long DBT MUN US N 2 2045-12-01 Fixed 5.00000000 N N N N N N Metropolitan Nashville Airport Authority, Tennessee, Airport Revenue Bonds, Subordinate Series 2019B 549300IC0HNF8TDXEE63 Metropolitan Nashville Airport Authority, Tennessee, Airport Revenue Bonds, Subordinate Series 2019B 592190PG1 5000000.00000000 PA USD 5183049.50000000 0.735900462818 Long DBT MUN US N 2 2049-07-01 Fixed 5.00000000 N N N N N N Poway Unified School District, San Diego County, California, General Obligation Bonds, School Facilities Improvement District 2007-1, Election 2008 Se N/A Poway Unified School District, San Diego County, California, General Obligation Bonds, School Facilities Improvement District 2007-1, Election 2008 Se 738850QR0 8000000.00000000 PA USD 5987914.40000000 0.850176904209 Long DBT MUN US N 2 2033-08-01 Fixed 0.01000000 N N N N N N Woodside Elementary School District, San Mateo County, California, General Obligation Bonds, Election of 2005, Series 2007 N/A Woodside Elementary School District, San Mateo County, California, General Obligation Bonds, Election of 2005, Series 2007 980230CV6 1150000.00000000 PA USD 938991.68000000 0.133320048727 Long DBT MUN US N 2 2030-10-01 Fixed 0.01000000 N N N N N N Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, State System of Higher Education, Series 2016AT-1 N/A Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, State System of Higher Education, Series 2016AT-1 70917THT1 4935000.00000000 PA USD 5169655.80000000 0.733998796621 Long DBT MUN US N 2 2031-06-15 Fixed 5.00000000 N N N N N N 2023-12-31 Nuveen Select Tax-Free Income Portfolio Gina Spunder Gina Spunder Director, Fund Financial Reporting XXXX NPORT-EX 2 tiaa_NXP.htm
1
Nuveen
Select
Tax-Free
Income
Portfolio
Portfolio
of
Investments
December
31,
2023
(Unaudited)
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
LONG-TERM
INVESTMENTS
-
98.4% 
X
–
MUNICIPAL
BONDS
-
97
.3
%
X
685,822,805
Arizona
-
3.0%
$
255
Arizona
Industrial
Development
Authority,
Arizona,
Education
Facility
Revenue
Bonds,
Basis
Schools,
Inc.
Projects,
Series
2017F,
3.000%,
7/01/26
No
Opt.
Call
$
252,488
1,950
Glendale
Municipal
Property
Corporation,
Arizona,
Excise
Tax
Revenue
Bonds,
Subordinate
Series
2012C,
4.000%,
7/01/38
1/24
at
100.00
1,950,460
1,000
Maricopa
County
Industrial
Development
Authority,
Arizona,
Education
Revenue
Bonds,
Legacy
Traditional
Schools
Projects,
Series
2021A,
4.000%,
7/01/51,
144A
7/31
at
100.00
781,538
1,465
Maricopa
County
Industrial
Development
Authority,
Arizona,
Education
Revenue
Bonds,
Legacy
Traditional
Schools
Projects,
Taxable
Series
2019B,
5.000%,
7/01/54,
144A
7/29
at
100.00
1,359,311
2,000
Maricopa
County
Industrial
Development
Authority,
Arizona,
Revenue
Bonds,
Banner
Health,
Refunding
Series
2016A,
5.000%,
1/01/38
1/27
at
100.00
2,084,072
1,950
McAllister
Academic
Village
LLC,
Arizona,
Revenue
Bonds,
Arizona
State
University
Hassayampa
Academic
Village
Project,
Refunding
Series
2016,
5.000%,
7/01/37
7/26
at
100.00
2,026,374
1,250
Phoenix
Civic
Improvement
Corporation,
Arizona,
Airport
Revenue
Bonds,
Junior
Lien
Series
2015A,
5.000%,
7/01/34
7/25
at
100.00
1,280,545
3,185
Phoenix
Civic
Improvement
Corporation,
Arizona,
Airport
Revenue
Bonds,
Junior
Lien
Series
2019A,
5.000%,
7/01/44
7/29
at
100.00
3,448,102
5,000
Phoenix
Civic
Improvement
Corporation,
Arizona,
Airport
Revenue
Bonds,
Junior
Lien
Series
2019B,
5.000%,
7/01/49,
(AMT)
7/29
at
100.00
5,207,668
2,410
Salt
Verde
Financial
Corporation,
Arizona,
Senior
Gas
Revenue
Bonds,
Citigroup
Energy
Inc
Prepay
Contract
Obligations,
Series
2007,
5.000%,
12/01/37
No
Opt.
Call
2,687,642
Total
Arizona
21,078,200
Arkansas
-
0.4%
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
2,311,458
500
Pulaski
County,
Arkansas,
Hospital
Revenue
Bonds,
Arkansas
Children's
Hospital,
Series
2023,
5.000%,
3/01/43
3/33
at
100.00
550,824
Total
Arkansas
2,862,282
California
-
16.8%
11,000
Alhambra
Unified
School
District,
Los
Angeles
County,
California,
General
Obligation
Bonds,
Capital
Appreciation
Series
2009B,
0.000%,
8/01/41
-
AGC
Insured
No
Opt.
Call
5,621,397
4,245
Anaheim
City
School
District,
Orange
County,
California,
General
Obligation
Bonds,
Election
2002
Series
2007,
0.010%,
8/01/31
-
AGM
Insured
No
Opt.
Call
3,419,667
Anaheim
Public
Financing
Authority,
California,
Lease
Revenue
Bonds,
Public
Improvement
Project,
Series
1997C
:
2,840
0.010%,
9/01/30
-
AGM
Insured
No
Opt.
Call
2,308,516
6,740
(c)
0.000%,
9/01/35
-
AGM
Insured,
(ETM)
No
Opt.
Call
4,787,452
5,760
0.000%,
9/01/35
-
AGM
Insured
No
Opt.
Call
3,879,437
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
2
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
California
(continued)
$
120
California
County
Tobacco
Securitization
Agency,
Tobacco
Settlement
Asset-Backed
Bonds,
Los
Angeles
County
Securitization
Corporation,
Series
2020A,
4.000%,
6/01/49
6/30
at
100.00
$
113,506
2,645
Cypress
Elementary
School
District,
Orange
County,
California,
General
Obligation
Bonds,
Series
2009A,
0.010%,
5/01/34
-
AGM
Insured
No
Opt.
Call
1,916,326
2,440
Eureka
Unified
School
District,
Humboldt
County,
California,
General
Obligation
Bonds,
Series
2002,
0.000%,
8/01/27
-
AGM
Insured
No
Opt.
Call
2,186,966
Folsom
Cordova
Unified
School
District,
Sacramento
County,
California,
General
Obligation
Bonds,
School
Facilities
Improvement
District
4,
Series
2007A
:
3,290
0.000%,
10/01/24
-
NPFG
Insured
No
Opt.
Call
3,215,670
2,275
0.000%,
10/01/28
-
NPFG
Insured
No
Opt.
Call
1,981,264
1,000
Fresno,
California,
Airport
Revenue
Bonds,
Series
2023A,
5.000%,
7/01/53
-
BAM
Insured,
(AMT)
7/33
at
100.00
1,064,173
6,080
(c)
Golden
State
Tobacco
Securitization
Corporation,
California,
Enhanced
Tobacco
Settlement
Asset-Backed
Revenue
Bonds,
Series
2005A,
0.000%,
6/01/28
-
AMBAC
Insured,
(ETM)
No
Opt.
Call
5,439,843
6,060
Grossmont
Union
High
School
District,
San
Diego
County,
California,
General
Obligation
Bonds,
Series
2006,
0.010%,
8/01/25
-
NPFG
Insured
No
Opt.
Call
5,767,159
1,495
Huntington
Beach
Union
High
School
District,
Orange
County,
California,
General
Obligation
Bonds,
Series
2007,
0.000%,
8/01/33
-
FGIC
Insured
No
Opt.
Call
1,118,640
4,055
Kern
Community
College
District,
California,
General
Obligation
Bonds,
Series
2003A,
0.000%,
3/01/28
-
FGIC
Insured
No
Opt.
Call
3,585,882
3,480
(d)
Mount
San
Antonio
Community
College
District,
Los
Angeles
County,
California,
General
Obligation
Bonds,
Election
of
2008,
Series
2013A,
0.000%,
8/01/43
8/35
at
100.00
3,472,147
450
M-S-R
Energy
Authority,
California,
Gas
Revenue
Bonds,
Citigroup
Prepay
Contracts,
Series
2009C,
6.500%,
11/01/39
No
Opt.
Call
579,864
11,985
Norwalk
La
Mirada
Unified
School
District,
Los
Angeles
County,
California,
General
Obligation
Bonds,
Election
2002,
Series
2007C,
0.000%,
8/01/32
-
AGM
Insured
No
Opt.
Call
9,231,968
1,195
Palmdale
School
District,
Los
Angeles
County,
California,
General
Obligation
Bonds,
Series
2003,
0.000%,
8/01/28
-
AGM
Insured
No
Opt.
Call
1,048,590
Palomar
Pomerado
Health,
California,
General
Obligation
Bonds,
Capital
Appreciation,
Election
of
2004,
Series
2007A
:
4,620
0.000%,
8/01/24
-
NPFG
Insured
No
Opt.
Call
4,533,624
3,000
0.000%,
8/01/25
-
NPFG
Insured
No
Opt.
Call
2,851,485
8,790
Pittsburg
Redevelopment
Agency,
California,
Tax
Allocation
Bonds,
Los
Medanos
Community
Development
Project,
Series
1999,
0.010%,
8/01/29
-
AMBAC
Insured
No
Opt.
Call
7,356,218
12,240
(c)
Placentia-Yorba
Linda
Unified
School
District,
Orange
County,
California,
Certificates
of
Participation,
Series
2006,
0.000%,
10/01/34
-
FGIC
Insured,
(ETM)
No
Opt.
Call
9,060,654
1,500
Placer
Union
High
School
District,
Placer
County,
California,
General
Obligation
Bonds,
Series
2004C,
0.000%,
8/01/32
-
AGM
Insured
No
Opt.
Call
1,166,231
Poway
Unified
School
District,
San
Diego
County,
California,
General
Obligation
Bonds,
School
Facilities
Improvement
District
2007-1,
Election
2008
Series
2009A
:
8,000
0.000%,
8/01/32
No
Opt.
Call
6,193,651
8,000
0.010%,
8/01/33
No
Opt.
Call
5,987,914
3
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
California
(continued)
$
3,940
Rancho
Mirage
Redevelopment
Agency,
California,
Tax
Allocation
Bonds,
Combined
Whitewater
and
1984
Project
Areas,
Series
2003A,
0.000%,
4/01/35
-
NPFG
Insured
No
Opt.
Call
$
2,641,595
2,755
Sacramento
City
Unified
School
District,
Sacramento
County,
California,
General
Obligation
Bonds,
Series
2007,
0.000%,
7/01/25
-
AGM
Insured
No
Opt.
Call
2,639,713
3,510
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
3,674,555
3,570
San
Diego
County
Regional
Airport
Authority,
California,
Airport
Revenue
Bonds,
International
Senior
Series
2023B,
5.000%,
7/01/48,
(AMT)
7/33
at
100.00
3,821,993
2,110
Sierra
Sands
Unified
School
District,
Kern
County,
California,
General
Obligation
Bonds,
Election
of
2006,
Series
2006A,
0.010%,
11/01/28
-
FGIC
Insured
No
Opt.
Call
1,808,886
6,025
Simi
Valley
Unified
School
District,
Ventura
County,
California,
General
Obligation
Bonds,
Election
of
2004
Series
2007C,
0.000%,
8/01/30
No
Opt.
Call
4,968,871
1,150
Woodside
Elementary
School
District,
San
Mateo
County,
California,
General
Obligation
Bonds,
Election
of
2005,
Series
2007,
0.010%,
10/01/30
-
AMBAC
Insured
No
Opt.
Call
938,992
Total
California
118,382,849
Colorado
-
8.3%
4,150
Arkansas
River
Power
Authority,
Colorado,
Power
Supply
System
Revenue
Bonds,
Refunding
Series
2018A,
5.000%,
10/01/43
10/28
at
100.00
4,273,318
150
Colorado
Health
Facilities
Authority,
Colorado,
Revenue
Bonds,
CommonSpirit
Health,
Series
2019A-1,
4.000%,
8/01/44
8/29
at
100.00
148,125
Colorado
Health
Facilities
Authority,
Colorado,
Revenue
Bonds,
CommonSpirit
Health,
Series
2019A-2
:
1,600
5.000%,
8/01/44
8/29
at
100.00
1,667,029
540
4.000%,
8/01/49
8/29
at
100.00
518,742
5,000
Colorado
School
of
Mines
Board
of
Trustees,
Golden,
Colorado,
Institutional
Enterprise
Revenue
Bonds,
Series
2017B,
5.000%,
12/01/47
12/27
at
100.00
5,220,423
2,475
Colorado
State,
Certificates
of
Participation,
Rural
Series
2020A,
4.000%,
12/15/37
12/30
at
100.00
2,586,181
1,500
Denver
City
and
County,
Colorado,
Airport
System
Revenue
Bonds,
Series
2022A,
5.000%,
11/15/47,
(AMT)
11/32
at
100.00
1,606,389
2,275
Denver
City
and
County,
Colorado,
Airport
System
Revenue
Bonds,
Series
2022D,
5.750%,
11/15/45,
(AMT)
11/32
at
100.00
2,599,031
5,805
(c)
Denver
City
and
County,
Colorado,
Airport
System
Revenue
Bonds,
Subordinate
Lien
Series
2013B,
5.000%,
11/15/43,
(Pre-refunded
2/16/24)
2/24
at
100.00
5,815,404
4,400
Denver
City
and
County,
Colorado,
Airport
System
Revenue
Bonds,
Subordinate
Lien
Series
2018B,
5.000%,
12/01/43
12/28
at
100.00
4,666,879
E-470
Public
Highway
Authority,
Colorado,
Senior
Revenue
Bonds,
Series
2000B
:
5,140
0.000%,
9/01/24
-
NPFG
Insured
No
Opt.
Call
5,029,125
8,350
0.000%,
9/01/29
-
NPFG
Insured
No
Opt.
Call
7,053,864
1,295
0.000%,
9/01/32
-
NPFG
Insured
No
Opt.
Call
984,805
4,475
0.000%,
9/01/33
-
NPFG
Insured
No
Opt.
Call
3,277,751
12,500
E-470
Public
Highway
Authority,
Colorado,
Senior
Revenue
Bonds,
Series
2006A,
0.010%,
9/01/38
-
NPFG
Insured
9/26
at
54.77
6,187,371
Park
Creek
Metropolitan
District,
Colorado,
Senior
Limited
Property
Tax
Supported
Revenue
Bonds,
Refunding
Series
2015A
:
1,000
5.000%,
12/01/33
12/25
at
100.00
1,028,693
620
5.000%,
12/01/35
12/25
at
100.00
635,132
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
4
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Colorado
(continued)
$
5,000
Windy
Gap
Firming
Project
Water
Activity
Enterprise,
Colorado,
Senior
Revenue
Bonds,
Series
2021,
5.000%,
7/15/51
7/31
at
100.00
$
5,411,306
Total
Colorado
58,709,568
Connecticut
-
4.2%
2,000
Connecticut
Health
and
Educational
Facilities
Authority,
Revenue
Bonds,
Avon
Old
Farms
School,
Series
2021D-1,
2.625%,
7/01/51
7/31
at
100.00
1,381,377
2,500
Connecticut
Health
and
Educational
Facilities
Authority,
Revenue
Bonds,
Fairfield
University,
Series
2022U,
4.000%,
7/01/52
7/32
at
100.00
2,429,287
1,175
Connecticut
Health
and
Educational
Facilities
Authority,
Revenue
Bonds,
Trinity
College,
Series
2021S,
4.000%,
6/01/51
12/31
at
100.00
1,174,104
5,100
Connecticut
State,
General
Obligation
Bonds,
Green
Series
2014G,
5.000%,
11/15/31
11/24
at
100.00
5,172,467
3,500
Connecticut
State,
General
Obligation
Bonds,
Series
2018C,
5.000%,
6/15/26
No
Opt.
Call
3,705,564
Connecticut
State,
Special
Tax
Obligation
Bonds,
Transportation
Infrastructure
Purposes
Series
2013A
:
3,475
5.000%,
10/01/30
1/24
at
100.00
3,479,006
2,490
(c)
5.000%,
10/01/33,
(Pre-refunded
1/29/24)
1/24
at
100.00
2,492,870
5,390
Connecticut
State,
Special
Tax
Obligation
Bonds,
Transportation
Infrastructure
Purposes,
Series
2021A,
4.000%,
5/01/40
5/31
at
100.00
5,573,996
3,000
(c)
Hartford
County
Metropolitan
District,
Connecticut,
Clean
Water
Project
Revenue
Bonds,
Refunding
Green
Bond
Series
2014A,
5.000%,
11/01/42,
(Pre-refunded
11/01/24)
11/24
at
100.00
3,051,861
750
University
of
Connecticut,
General
Obligation
Bonds,
Series
2015A,
5.000%,
3/15/31
3/26
at
100.00
784,595
Total
Connecticut
29,245,127
District
of
Columbia
-
1.8%
2,710
Metropolitan
Washington
Airports
Authority,
Virginia,
Dulles
Toll
Road
Revenue
Bonds,
Dulles
Metrorail
&
Capital
improvement
Projects,
Refunding
&
Subordinate
Lien
Series
2019B,
4.000%,
10/01/44
10/29
at
100.00
2,649,349
1,500
(c)
Metropolitan
Washington
Airports
Authority,
Virginia,
Dulles
Toll
Road
Revenue
Bonds,
Dulles
Metrorail
&
Capital
improvement
Projects,
Second
Senior
Lien
Series
2009C,
6.500%,
10/01/41,
(Pre-refunded
10/01/26)
-
AGC
Insured
10/26
at
100.00
1,653,849
2,000
Metropolitan
Washington
Airports
Authority,
Virginia,
Dulles
Toll
Road
Revenue
Bonds,
Dulles
Metrorail
Capital
Appreciation,
Second
Senior
Lien
Series
2010B,
6.500%,
10/01/44
10/28
at
100.00
2,222,938
5,000
Metropolitan
Washington
D.C.
Airports
Authority,
Airport
System
Revenue
Bonds,
Refunding
Series
2023A,
5.250%,
10/01/53,
(AMT)
10/32
at
100.00
5,401,721
1,070
Washington
Metropolitan
Area
Transit
Authority,
Dedicated
Revenue
Bonds,
Green
Series
2021A,
4.000%,
7/15/46
7/31
at
100.00
1,072,173
Total
District
of
Columbia
13,000,030
Florida
-
2.9%
3,690
Florida
Development
Finance
Corporation,
Florida,
Surface
Transportation
Facility
Revenue
Bonds,
Brightline
Passenger
Rail
Project,
Series
2019A-2,
6.250%,
1/01/49,
(AMT),
(Mandatory
Put
12/18/24),
144A
2/24
at
100.00
3,689,676
7,000
Florida
Development
Finance
Corporation,
Revenue
Bonds,
Brightline
Passenger
Rail
Expansion
Project,
Series
2023C,
8.000%,
7/01/57,
(AMT),
(Mandatory
Put
4/01/24),
144A
1/24
at
103.00
7,145,517
5
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Florida
(continued)
Greater
Orlando
Aviation
Authority,
Florida,
Orlando
Airport
Facilities
Revenue
Bonds,
Priority
Subordinated
Series
2017A
:
$
2,000
5.000%,
10/01/42,
(AMT)
10/27
at
100.00
$
2,064,975
1,545
5.000%,
10/01/47,
(AMT)
10/27
at
100.00
1,588,412
1,500
Lakeland,
Florida,
Hospital
System
Revenue
Bonds,
Lakeland
Regional
Health,
Series
2015,
5.000%,
11/15/45
11/24
at
100.00
1,507,466
2,000
Miami-Dade
County,
Florida,
General
Obligation
Bonds,
Build
Better
Communities
Program,
Series
2013A,
5.000%,
7/01/30
7/25
at
100.00
2,061,435
2,395
Tampa,
Florida,
Hospital
Revenue
Bonds,
H.
Lee
Moffitt
Cancer
Center
Project,
Series
2020B,
4.000%,
7/01/45
7/30
at
100.00
2,382,833
Total
Florida
20,440,314
Georgia
-
1.1%
3,665
Brookhaven
Development
Authority,
Georgia,
Revenue
Bonds,
Children's
Healthcare
of
Atlanta,
Inc.
Project,
Series
2019A,
4.000%,
7/01/49
7/29
at
100.00
3,572,707
3,775
Main
Street
Natural
Gas
Inc.,
Georgia,
Gas
Supply
Revenue
Bonds,
Series
2023D,
5.000%,
12/01/54,
(Mandatory
Put
12/01/30)
9/30
at
100.08
4,017,212
Total
Georgia
7,589,919
Guam
-
1.5%
7,250
Government
of
Guam,
Business
Privilege
Tax
Bonds,
Refunding
Series
2015D,
5.000%,
11/15/39
11/25
at
100.00
7,307,662
1,740
Guam
Government
Waterworks
Authority,
Water
and
Wastewater
System
Revenue
Bonds,
Series
2013,
5.250%,
7/01/25
1/24
at
100.00
1,742,006
1,460
Guam
Government
Waterworks
Authority,
Water
and
Wastewater
System
Revenue
Bonds,
Series
2016,
5.000%,
1/01/46
7/26
at
100.00
1,483,135
Total
Guam
10,532,803
Hawaii
-
1.0%
6,895
Hawaii
State,
Airport
System
Revenue
Bonds,
Series
2015A,
5.000%,
7/01/41,
(AMT)
7/25
at
100.00
6,966,374
Total
Hawaii
6,966,374
Idaho
-
3.8%
5,000
Boise
City
Water
Renewal
System,
Idaho,
Revenue
Bonds,
Refunding
Series
2022,
5.000%,
9/01/47
9/32
at
100.00
5,501,965
1,600
Boise
State
University,
Idaho,
General
Revenue
Bonds,
Series
2023A,
5.000%,
4/01/48
4/33
at
100.00
1,779,368
10,000
Idaho
Health
Facilities
Authority,
Revenue
Bonds,
Saint
Luke's
Health
System
Project,
Series
2014A,
5.000%,
3/01/44
3/24
at
100.00
10,006,587
1,220
Idaho
Housing
&
Finance
Association,
Idaho,
Sales
Tax
Revenue
Bonds,
Transportation
Expansion
&
Congestion
Mitigation
Fund,
Series
2023A,
5.250%,
8/15/48
8/33
at
100.00
1,386,060
Idaho
Housing
and
Finance
Association,
Nonprofit
Facilities
Revenue
Bonds,
The
College
of
Idaho
Project,
Series
2023
:
2,000
5.625%,
11/01/43,
144A
11/33
at
100.00
2,072,485
6,000
5.875%,
11/01/53,
144A
11/33
at
100.00
6,175,713
Total
Idaho
26,922,178
Illinois
-
8.5%
2,050
Chicago
Board
of
Education,
Illinois,
Dedicated
Capital
Improvement
Tax
Revenue
Bonds,
Series
2016,
6.000%,
4/01/46
4/27
at
100.00
2,131,276
1,790
Chicago
Board
of
Education,
Illinois,
General
Obligation
Bonds,
Dedicated
Revenues,
Refunding
Series
2017C,
5.000%,
12/01/30
12/27
at
100.00
1,834,386
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
6
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Illinois
(continued)
$
725
Chicago
Board
of
Education,
Illinois,
General
Obligation
Bonds,
Dedicated
Revenues,
Series
2016B,
6.500%,
12/01/46
12/26
at
100.00
$
759,077
3,900
Chicago
Board
of
Education,
Illinois,
General
Obligation
Bonds,
Series
1999A,
0.000%,
12/01/28
-
FGIC
Insured
No
Opt.
Call
3,230,386
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
45,557
880
Chicago,
Illinois,
General
Obligation
Bonds,
Project
&
Refunding
Series
2017A,
6.000%,
1/01/38
1/27
at
100.00
924,368
1,500
Chicago,
Illinois,
Midway
Airport
Revenue
Bonds,
Refunding
Senior
Lien
Series
2023C,
5.000%,
1/01/41
1/34
at
100.00
1,630,615
5,000
Chicago,
Illinois,
Wastewater
Transmission
Revenue
Bonds,
Second
Lien
Project,
Series
2023A,
5.250%,
1/01/53
-
AGM
Insured
7/33
at
100.00
5,521,149
1,190
Chicago,
Illinois,
Water
Revenue
Bonds,
Second
Lien
Series
2023A,
5.250%,
11/01/53
-
AGM
Insured
5/33
at
100.00
1,312,162
2,500
Illinois
Toll
Highway
Authority,
Toll
Highway
Revenue
Bonds,
Senior
Lien
Series
2021A,
4.000%,
1/01/46
1/32
at
100.00
2,482,220
1,000
Kendall,
Kane,
and
Will
Counties
Community
Unit
School
District
308
Oswego,  Illinois,
General
Obligation
Bonds,
Series
2008,
0.010%,
2/01/24
-
AGM
Insured
No
Opt.
Call
997,310
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
1,417,832
765
0.000%,
6/15/30
9/23
at
67.44
618,665
45
(c)
0.000%,
6/15/30,
(ETM)
No
Opt.
Call
37,568
2,500
0.000%,
12/15/30
-
NPFG
Insured
No
Opt.
Call
1,988,014
17,195
0.010%,
12/15/31
-
NPFG
Insured
No
Opt.
Call
13,214,352
1,350
0.000%,
6/15/35
-
NPFG
Insured
No
Opt.
Call
913,840
15,000
0.010%,
12/15/36
-
NPFG
Insured
No
Opt.
Call
9,418,466
2,000
0.000%,
6/15/37
-
NPFG
Insured
No
Opt.
Call
1,222,360
9,370
0.000%,
6/15/39
-
NPFG
Insured
No
Opt.
Call
5,075,634
5,000
Springfield,
Illinois,
Electric
Revenue
Bonds,
Refunding
Senior
Lien
Series
2015,
5.000%,
3/01/28
3/25
at
100.00
5,088,672
Total
Illinois
59,863,909
Indiana
-
1.3%
1,600
Indiana
Bond
Bank,
Special
Program
Bonds,
Carmel
Junior
Waterworks
Project,
Series
2008B,
0.000%,
6/01/30
-
AGM
Insured
No
Opt.
Call
1,296,455
2,040
Indiana
Finance
Authority,
Hospital
Revenue
Bonds,
Indiana
Unversity
Health
Obligation
Group,
Refunding
2015A,
5.000%,
12/01/40
6/25
at
100.00
2,080,231
5,060
Indiana
Finance
Authority,
Hospital
Revenue
Bonds,
Marion
General
Hospital
Project,
Series
2020A,
4.000%,
7/01/45
7/30
at
100.00
4,817,322
1,000
Zionsville
Community
Schools
Building
Corporation,
Boone
County,
Indiana,
First
Mortgage
Bonds,
Series
2005Z,
0.000%,
7/15/28
-
AGM
Insured
No
Opt.
Call
874,044
Total
Indiana
9,068,052
Iowa
-
0.2%
1,165
Iowa
Finance
Authority,
Iowa,
Midwestern
Disaster
Area
Revenue
Bonds,
Iowa
Fertilizer
Company
Project,
Refunding
Series
2022,
5.000%,
12/01/50,
(Mandatory
Put
12/01/42)
12/29
at
103.00
1,216,025
Total
Iowa
1,216,025
7
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Kentucky
-
0.1%
$
805
Kentucky
Public
Transportation
Infrastructure
Authority,
Toll
Revenue
Bonds,
Downtown
Crossing
Project,
Convertible
Capital
Appreciation
First
Tier
Series
2013C,
6.750%,
7/01/43
7/31
at
100.00
$
921,805
Total
Kentucky
921,805
Louisiana
-
0.3%
1,870
Jefferson
Sales
Tax
District,
Jefferson
Parish,
Louisiana,
Special
Sales
Tax
Revenue
Bonds,
Series
2017B,
5.000%,
12/01/42
-
AGM
Insured
12/27
at
100.00
1,957,876
Total
Louisiana
1,957,876
Massachusetts
-
4.7%
Massachusetts
Development
Finance
Agency,
Revenue
Bonds,
Boston
University,
Series
2016BB-1
:
10,000
4.000%,
10/01/46
10/26
at
100.00
10,040,906
2,230
5.000%,
10/01/46
10/26
at
100.00
2,299,186
3,000
Massachusetts
Development
Finance
Agency,
Revenue
Bonds,
CareGroup
Issue,
Series
2018J-2,
5.000%,
7/01/43
7/28
at
100.00
3,136,463
6,500
Massachusetts
Development
Finance
Agency,
Revenue
Bonds,
Dana-
Farber
Cancer
Institute
Issue,
Series
2016N,
5.000%,
12/01/46
12/26
at
100.00
6,662,580
600
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
568,287
2,415
Massachusetts
State,
Transportation
Fund
Revenue
Bonds,
Rail
Enhancement
&
Accelerated
Bridge
Programs,
Series
2017A,
5.000%,
6/01/47
6/27
at
100.00
2,520,204
5,000
Massachusetts
State,
Transportation
Fund
Revenue
Bonds,
Rail
Enhancement
Program,
Sustainability  Green
Series
2022A,
5.000%,
6/01/50
6/31
at
100.00
5,446,099
1,000
Newburyport,
Massachusetts,
General
Obligation
Bonds,
Municipal
Purpose
Loan,
Refunding
Series
2013,
4.000%,
1/15/30
1/24
at
100.00
1,000,453
University
of
Massachusetts
Building
Authority,
Project
Revenue
Bonds,
Senior
Series
2014-1
:
480
5.000%,
11/01/39
11/24
at
100.00
485,221
255
(c)
5.000%,
11/01/39,
(Pre-refunded
11/01/24)
11/24
at
100.00
259,198
220
(c)
5.000%,
11/01/39,
(Pre-refunded
11/01/24)
11/24
at
100.00
223,622
210
(c)
5.000%,
11/01/39,
(Pre-refunded
11/01/24)
11/24
at
100.00
213,457
Total
Massachusetts
32,855,676
Michigan
-
0.8%
385
Michigan
State
Building
Authority,
Revenue
Bonds,
Facilities
Program,
Refunding
Series
2015-I,
5.000%,
4/15/38
10/25
at
100.00
395,581
4,000
Michigan
State
Building
Authority,
Revenue
Bonds,
Facilities
Program,
Refunding
Series
2016-I,
5.000%,
4/15/35
10/26
at
100.00
4,210,193
1,000
Wayne
County
Airport
Authority,
Michigan,
Revenue
Bonds,
Detroit
Metropolitan
Wayne
County
Airport,
Series
2023B,
5.500%,
12/01/48
-
AGM
Insured,
(AMT)
12/33
at
100.00
1,116,055
Total
Michigan
5,721,829
Missouri
-
2.7%
5,000
Jackson
County,
Missouri,
Special
Obligation
Bonds,
Series
2023A,
5.250%,
12/01/47
12/33
at
100.00
5,589,697
7,000
Kansas
City
Industrial
Development
Authority,
Missouri,
Airport
Special
Obligation
Bonds,
Kansas
City
International
Airport
Terminal
Modernization
Project,
Series
2019B,
5.000%,
3/01/54,
(AMT)
3/29
at
100.00
7,151,303
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
8
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Missouri
(continued)
$
5,000
Kansas
City
Municipal
Assistance
Corporation,
Missouri,
Leasehold
Revenue
Bonds,
Improvement
Series
2004B-1,
0.000%,
4/15/30
-
AMBAC
Insured
No
Opt.
Call
$
4,114,340
2,000
Missouri
Health
and
Educational
Facilities
Authority,
Health
Facilities
Revenue
Bonds,
CoxHealth,
Series
2013A,
5.000%,
11/15/38
1/24
at
100.00
2,001,508
Total
Missouri
18,856,848
Nebraska
-
1.3%
3,550
Central
Plains
Energy
Project,
Nebraska,
Gas
Project
4
Revenue
Bonds,
Refunding
Series
2023A-1,
5.000%,
5/01/54,
(Mandatory
Put
11/01/29)
8/29
at
100.13
3,765,060
Douglas
County
Hospital
Authority
3,
Nebraska,
Health
Facilities
Revenue
Bonds,
Nebraska
Methodist
Health
System,
Refunding
Series
2015
:
545
4.125%,
11/01/36
11/25
at
100.00
550,862
2,700
5.000%,
11/01/45
11/25
at
100.00
2,746,526
Madison
County
Hospital
Authority
1,
Nebraska,
Hospital
Revenue
Bonds,
Faith
Regional
Health
Services
Project,
Series
2018
:
250
5.000%,
7/01/26
7/25
at
100.00
255,211
305
5.000%,
7/01/27
7/25
at
100.00
311,476
500
(c)
Platte
County
School
District
001,
Columbus
Public
Schools,
Nebraska,
General
Obligation
Bonds,
School
Building
Series
2014,
5.000%,
12/15/39,
(Pre-refunded
6/15/24)
6/24
at
100.00
504,564
1,000
University
of
Nebraska
Facilities
Corporation,
Nebraska,
Facilities
Program
Bonds,
Green
Series
2021B,
5.000%,
7/15/51
7/31
at
100.00
1,084,995
Total
Nebraska
9,218,694
Nevada
-
0.7%
1,710
Carson
City,
Nevada,
Hospital
Revenue
Bonds,
Carson
Tahoe
Regional
Healthcare
Project,
Series
2017A,
5.000%,
9/01/37
9/27
at
100.00
1,757,452
3,000
Las
Vegas
Valley
Water
District,
Nevada,
General
Obligation
Bonds,
Refunding
Series
2015,
5.000%,
6/01/34
12/24
at
100.00
3,051,874
Total
Nevada
4,809,326
New
Hampshire
-
0.3%
2,250
New
Hampshire
Business
Finance
Authority,
Solid
Waste
Disposal
Revenue
Bonds,
Waste
Management
Inc.
Project,
Series
2003,
3.125%,
8/01/24,
(AMT)
No
Opt.
Call
2,239,073
Total
New
Hampshire
2,239,073
New
Jersey
-
5.4%
3,495
Delaware
River
Port
Authority,
New
Jersey
and
Pennsylvania,
Revenue
Bonds,  Series
2013,
5.000%,
1/01/37
1/24
at
100.00
3,504,206
940
New
Jersey
Economic
Development
Authority,
Private
Activity
Bonds,
The
Goethals
Bridge
Replacement
Project,
Series
2013,
5.125%,
1/01/39
-
AGM
Insured,
(AMT)
1/24
at
100.00
939,934
2,000
(c)
New
Jersey
Economic
Development
Authority,
School
Facilities
Construction
Bonds,
Refunding
Series
2016BBB,
5.500%,
6/15/31,
(Pre-
refunded
12/15/26)
12/26
at
100.00
2,173,604
New
Jersey
Health
Care
Facilities
Financing
Authority,
Revenue
Bonds,
University
Hospital
Issue,
Refunding
Series
2015A
:
305
5.000%,
7/01/28
-
AGM
Insured
7/25
at
100.00
313,173
260
5.000%,
7/01/29
-
AGM
Insured
7/25
at
100.00
266,939
New
Jersey
Transportation
Trust
Fund
Authority,
Transportation
System
Bonds,
Refunding
Series
2006C
:
4,900
0.010%,
12/15/28
-
AMBAC
Insured
No
Opt.
Call
4,203,628
9
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
New
Jersey
(continued)
$
35,000
0.010%,
12/15/34
-
AGM
Insured
No
Opt.
Call
$
24,786,293
2,000
New
Jersey
Transportation
Trust
Fund
Authority,
Transportation
System
Bonds,
Series
2015AA,
5.250%,
6/15/29
6/25
at
100.00
2,063,158
Total
New
Jersey
38,250,935
New
Mexico
-
0.7%
1,000
Farmington
Municipal
School
District
5,
San
Juan
County,
New
Mexico,
General
Obligation
Bonds,
School
Building
Series
2015,
5.000%,
9/01/28
9/25
at
100.00
1,033,817
3,000
New
Mexico
Mortgage
Finance
Authority,
Multifamily
Housing
Revenue
Bonds,
St
Anthony,
Series
2007A,
5.250%,
9/01/42,
(AMT)
1/24
at
100.00
3,007,213
1,035
University
of
New
Mexico,
Revenue
Bonds,
Refunding
&
Improvement
Subordinate
Lien
Series
2016A,
4.500%,
6/01/36
6/26
at
100.00
1,057,375
Total
New
Mexico
5,098,405
New
York
-
2.4%
2,000
Metropolitan
Transportation
Authority,
New
York,
Transportation
Revenue
Bonds,
Green
Climate
Bond
Certified
Series
2019A-1,
5.000%,
11/15/48,
(Mandatory
Put
11/15/24)
No
Opt.
Call
2,014,215
1,260
New
York
City
Municipal
Water
Finance
Authority,
New
York,
Water
and
Sewer
System
Second
General
Resolution
Revenue
Bonds,
Fiscal
2015
Series
HH,
5.000%,
6/15/37
6/25
at
100.00
1,284,111
10,000
New
York
State
Urban
Development
Corporation,
State
Personal
Income
Tax
Revenue
Bonds,
General
Purpose,
Series
2020A,
4.000%,
3/15/45
9/30
at
100.00
10,114,577
2,500
Port
Authority
of
New
York
and
New
Jersey,
Consolidated
Revenue
Bonds,
Two
Hundred
Thirty-Four
Series
2022,
5.250%,
8/01/47,
(AMT)
8/32
at
100.00
2,702,375
1,000
TSASC
Inc.,
New
York,
Tobacco
Settlement
Asset-Backed
Bonds,
Fiscal
2017
Series
B,
5.000%,
6/01/24
No
Opt.
Call
1,002,531
Total
New
York
17,117,809
North
Carolina
-
0.2%
1,000
Charlotte,
North
Carolina,
Airport
Revenue
Bonds,
Charlotte
Douglas
International,
Series
2023B,
5.000%,
7/01/48,
(AMT)
7/33
at
100.00
1,073,027
Total
North
Carolina
1,073,027
Ohio
-
0.2%
1,000
Buckeye
Tobacco
Settlement
Financing
Authority,
Ohio,
Tobacco
Settlement
Asset-Backed
Revenue
Bonds,
Refunding
Senior
Lien
Series
2020B-2
Class
2,
5.000%,
6/01/55
6/30
at
100.00
941,193
250
Ohio
Air
Quality
Development
Authority,
Ohio,
Pollution
Control
Revenue
Bonds,
FirstEnergy
Generation
Corporation
Project,
Refunding
Series
2009D,
3.375%,
8/01/29,
(Mandatory
Put
9/15/21)
No
Opt.
Call
227,676
Total
Ohio
1,168,869
Oklahoma
-
1.0%
1,230
Oklahoma
Development
Finance
Authority,
Health
System
Revenue
Bonds,
OU
Medicine
Project,
Series
2018B,
5.000%,
8/15/38
8/28
at
100.00
1,208,600
5,000
Oklahoma
State
Turnpike
Authority,
Turnpike
System
Revenue
Bonds,
Second
Senior
Series
2023,
5.500%,
1/01/53
1/32
at
100.00
5,652,798
Total
Oklahoma
6,861,398
Oregon
-
3.2%
1,505
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
1,608,198
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
10
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Oregon
(continued)
$
60
Clackamas
Community
College
District,
Oregon,
General
Obligation
Bonds,
Deferred
Interest
Series
2017A,
5.000%,
6/15/40
6/27
at
100.00
$
63,426
500
Clackamas
County
Hospital
Facility
Authority,
Oregon,
Senior
Living
Revenue
Bonds,
Willamette
View
Project,
Series
2017A,
5.000%,
11/15/52
11/25
at
102.00
450,685
2,000
Clackamas
County
School
District
12,
North
Clackamas,
Oregon,
General
Obligation
Bonds,
Deferred
Interest
Series
2017A,
0.000%,
6/15/41
6/27
at
53.27
917,974
2,130
Medford
Hospital
Facilities
Authority,
Oregon,
Hospital
Revenue
Bonds,
Asante
Health
System,
Refunding
Series
2020A,
5.000%,
8/15/50
8/30
at
100.00
2,241,390
3,000
(c)
Oregon
Facilities
Authority,
Revenue
Bonds,
Reed
College,
Series
2017A,
4.000%,
7/01/41,
(Pre-refunded
7/01/27)
7/27
at
100.00
3,146,732
2,000
Oregon
Facilities
Authority,
Revenue
Bonds,
Willamette
University,
Refunding
Series
2016B,
5.000%,
10/01/40
10/26
at
100.00
2,038,453
5,000
Oregon
Health
and
Science
University,
Revenue
Bonds,
Green
Series
2021A,
4.000%,
7/01/44
1/32
at
100.00
5,032,044
2,500
Salem
Hospital
Facility
Authority,
Oregon,
Revenue
Bonds,
Salem
Health
Projects,
Refunding
Series
2016A,
5.000%,
5/15/46
5/26
at
100.00
2,548,476
750
Washington
and
Clackamas
Counties
School
District
23J
Tigard-Tualatin,
Oregon,
General
Obligation
Bonds,
Series
2017,
5.000%,
6/15/30
6/27
at
100.00
811,943
Yamhill
County,
Oregon,
Revenue
Bonds,
George
Fox
University
Project,
Refunding
Series
2021
:
1,500
4.000%,
12/01/36
12/31
at
100.00
1,509,169
1,875
4.000%,
12/01/41
12/31
at
100.00
1,866,982
Total
Oregon
22,235,472
Pennsylvania
-
0.9%
1,500
Beaver
County
Industrial
Development
Authority,
Pennsylvania,
Pollution
Control
Revenue
Refunding
Bonds,
FirstEnergy
Generation
Project,
Series
2008B,
3.750%,
10/01/47
4/31
at
100.00
1,090,288
Pennsylvania
Higher
Educational
Facilities
Authority,
Revenue
Bonds,
State
System
of
Higher
Education,
Series
2016AT-1
:
4,935
5.000%,
6/15/31
6/26
at
100.00
5,169,656
65
(c)
5.000%,
6/15/31,
(Pre-refunded
6/15/26)
6/26
at
100.00
68,489
Total
Pennsylvania
6,328,433
Puerto
Rico
-
2.4%
Puerto
Rico
Sales
Tax
Financing
Corporation,
Sales
Tax
Revenue
Bonds,
Restructured
2018A-1
:
21,600
0.000%,
7/01/46
7/28
at
41.38
6,799,112
2,550
4.750%,
7/01/53
7/28
at
100.00
2,529,986
Puerto
Rico
Sales
Tax
Financing
Corporation,
Sales
Tax
Revenue
Bonds,
Taxable
Restructured
Cofina
Project
Series
2019A-2
:
4,000
4.329%,
7/01/40
7/28
at
100.00
3,980,856
3,624
4.784%,
7/01/58
7/28
at
100.00
3,581,199
536
Puerto
Rico,
General
Obligation
Bonds,
Clawback
Highway
Transportation
Authority
Claims
Taxable
Series
2022,
0.000%,
11/01/51
No
Opt.
Call
293,085
Total
Puerto
Rico
17,184,238
South
Carolina
-
0.2%
1,270
South
Carolina
Transportation
Infrastructure
Bank,
Revenue
Bonds,
Refunding
Series
2015A,
2.900%,
10/01/25
10/24
at
100.00
1,270,048
Total
South
Carolina
1,270,048
11
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
South
Dakota
-
0.1%
$
1,000
South
Dakota
Health
and
Educational
Facilities
Authority,
Revenue
Bonds,
Sanford
Health,
Series
2015,
5.000%,
11/01/35
11/25
at
100.00
$
1,031,946
Total
South
Dakota
1,031,946
Tennessee
-
0.7%
5,000
Metropolitan
Nashville
Airport
Authority,
Tennessee,
Airport
Revenue
Bonds,
Subordinate
Series
2019B,
5.000%,
7/01/49,
(AMT)
7/30
at
100.00
5,183,049
Total
Tennessee
5,183,049
Texas
-
7.8%
4,675
(c)
Alamo
Regional
Mobility
Authority,
Texas,
Vehicle
Registration
Fee
Revenue
Bonds,
Senior
Lien
Series
2016,
5.000%,
6/15/46,
(Pre-refunded
6/15/25)
6/25
at
100.00
4,819,674
Central
Texas
Regional
Mobility
Authority,
Revenue
Bonds,
Senior
Lien,
Series
2015A
:
110
(c)
5.000%,
1/01/33,
(Pre-refunded
7/01/25)
7/25
at
100.00
113,453
85
(c)
5.000%,
1/01/34,
(Pre-refunded
7/01/25)
7/25
at
100.00
87,668
240
(c)
5.000%,
1/01/35,
(Pre-refunded
7/01/25)
7/25
at
100.00
247,533
1,160
Harris
County
Cultural
Education
Facilities
Finance
Corporation,
Texas,
Revenue
Bonds,
Houston
Methodist
Hospital
System,
Series
2015,
5.000%,
12/01/45
6/25
at
100.00
1,176,275
2,500
Harris
County
Flood
Control
District,
Texas,
Contract
Tax
Bonds,
Refunding
Series
2017A,
4.000%,
10/01/35
10/27
at
100.00
2,583,814
Harris
County-Houston
Sports
Authority,
Texas,
Revenue
Bonds,
Junior
Lien
Series
2001H
:
520
0.000%,
11/15/24
-
NPFG
Insured
No
Opt.
Call
503,910
110
(c)
0.000%,
11/15/24
-
NPFG
Insured,
(ETM)
No
Opt.
Call
106,708
2,935
0.000%,
11/15/30
-
NPFG
Insured
No
Opt.
Call
2,296,679
480
(c)
0.000%,
11/15/30
-
NPFG
Insured,
(ETM)
No
Opt.
Call
387,994
1,405
0.000%,
11/15/32
-
NPFG
Insured
11/31
at
94.05
988,143
2,510
0.000%,
11/15/36
-
NPFG
Insured
11/31
at
73.51
1,340,171
12,480
0.000%,
11/15/41
-
NPFG
Insured
11/31
at
53.78
4,672,370
Harris
County-Houston
Sports
Authority,
Texas,
Revenue
Bonds,
Third
Lien
Series
2004A-3
:
2,235
0.000%,
11/15/32
-
NPFG
Insured
11/24
at
62.71
1,353,154
4,230
0.000%,
11/15/35
-
NPFG
Insured
11/24
at
52.47
2,138,668
Harris
County-Houston
Sports
Authority,
Texas,
Special
Revenue
Bonds,
Refunding
Senior
Lien
Series
2001A
:
3,045
0.000%,
11/15/34
-
NPFG
Insured
11/30
at
78.27
1,912,195
8,110
0.000%,
11/15/38
-
NPFG
Insured
11/30
at
61.17
3,840,883
575
Houston,
Texas,
Hotel
Occupancy
Tax
and
Special
Revenue
Bonds,
Convention
and
Entertainment
Project,
Series
2001B,
0.000%,
9/01/24
-
AMBAC
Insured
No
Opt.
Call
562,304
5,325
Irving
Independent
School
District,
Dallas
County,
Texas,
General
Obligation
Bonds,
School
Building
Series
2023,
5.000%,
2/15/41
8/32
at
100.00
6,052,064
13,410
Lamar
Consolidated
Independent
School
District,
Fort
Bend
County,
Texas,
General
Obligation
Bonds,
Schoolhouse
Series
2023A,
5.000%,
2/15/53
2/33
at
100.00
14,837,761
430
Mission
Economic
Development
Corporation,
Texas,
Revenue
Bonds,
Natgasoline
Project,
Senior
Lien
Series
2018,
4.625%,
10/01/31,
(AMT),
144A
1/24
at
103.00
424,877
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
12
NXP
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
Texas
(continued)
North
Texas
Tollway
Authority,
System
Revenue
Bonds,
Refunding
First
Tier
Capital
Appreciation
Series
2008I
:
$
290
(c)
6.200%,
1/01/42,
(Pre-refunded
1/01/25)
-
AGC
Insured
1/25
at
100.00
$
299,120
2,000
(c)
6.500%,
1/01/43,
(Pre-refunded
1/01/25)
1/25
at
100.00
2,067,738
200
Tarrant
County
Cultural
Education
Facilities
Finance
Corporation,
Texas,
Hospital
Revenue
Bonds,
Scott
&
White
Healthcare
Project,
Series
2016A,
4.000%,
11/15/42
5/26
at
100.00
198,549
2,410
Texas
Turnpike
Authority,
Central
Texas
Turnpike
System
Revenue
Bonds,
First
Tier
Series
2002A,
0.000%,
8/15/25
-
AMBAC
Insured
No
Opt.
Call
2,285,579
Total
Texas
55,297,284
Virgin
Islands
-
0.2%
1,645
Matching
Fund
Special
Purpose
Securitization
Corporation,
Virgin
Islands,
Revenue
Bonds,
Series
2022A,
5.000%,
10/01/39
10/32
at
100.00
1,654,136
Total
Virgin
Islands
1,654,136
Washington
-
5.2%
5,000
Port
of
Seattle,
Washington,
Revenue
Bonds,
Intermediate
Lien
Series
2019,
5.000%,
4/01/44,
(AMT)
4/29
at
100.00
5,237,055
3,485
Port
of
Seattle,
Washington,
Revenue
Bonds,
Refunding
Intermediate
Lien
Series
2021C,
5.000%,
8/01/46,
(AMT)
8/31
at
100.00
3,692,876
860
Snohomish
County
School
District
306
Lakewood,
Washington,
General
Obligation
Bonds,
Series
2014,
5.000%,
12/01/28
6/24
at
100.00
866,523
4,000
Washington
Health
Care
Facilities
Authority,
Revenue
Bonds,
Providence
Health
&
Services,
Refunding
Series
2012A,
5.000%,
10/01/32
1/24
at
100.00
4,001,358
5,000
Washington
Health
Care
Facilities
Authority,
Revenue
Bonds,
Providence
Health
&
Services,
Series
2014D,
5.000%,
10/01/38
10/24
at
100.00
5,001,224
8,390
Washington
State
Convention
Center
Public
Facilities
District,
Lodging
Tax
Revenue
Bonds,
Refunding
Series2021B.
Exchange
Purchase,
4.000%,
7/01/58
7/31
at
100.00
7,707,580
5,710
Washington
State,
General
Obligation
Bonds,
Various
Purpose
Series
2015B,
5.000%,
2/01/37
2/25
at
100.00
5,812,365
2,060
Washington
State,
General
Obligation
Bonds,
Various
Purpose
Series
2016A-1,
5.000%,
8/01/39
8/25
at
100.00
2,103,994
2,115
Washington
State,
Motor
Vehicle
Fuel
Tax
General
Obligation
Bonds,
Series
2003F,
0.010%,
12/01/27
-
NPFG
Insured
No
Opt.
Call
1,891,525
Total
Washington
36,314,500
Wisconsin
-
1.0%
3,290
Wisconsin
Health
and
Educational
Facilities
Authority,
Revenue
Bonds,
Mercy
Alliance,
Inc.,
Series
2012,
5.000%,
6/01/39
1/24
at
100.00
3,291,978
3,855
Wisconsin
Health
and
Educational
Facilities
Authority,
Wisconsin,
Revenue
Bonds,
Medical
College
of
Wisconsin,
Inc.,
Series
2016,
5.000%,
12/01/41
11/26
at
100.00
4,002,521
Total
Wisconsin
7,294,499
Total
Municipal
Bonds
(cost
$632,502,472)
685,822,805
13
Part
F
of
Form
N-PORT
was
prepared
in
accordance
with
U.S.
generally
accepted
accounting
principles
(“U.S.
GAAP”)
and
in
conformity
with
the
applicable
rules
and
regulations
of
the
U.S.
Securities
and
Exchange
Commission
(“SEC”)
related
to
interim
filings.
Part
F
of
Form
N-PORT
does
not
include
all
information
and
footnotes
required
by
U.S.
GAAP
for
complete
financial
statements.
Certain
footnote
disclosures
normally
included
in
financial
statements
prepared
in
accordance
with
U.S.
GAAP
have
been
condensed
or
omitted
from
this
report
pursuant
to
the
rules
of
the
SEC.
For
a
full
set
of
the
Fund’s
notes
to
financial
statements,
please
refer
to
the
Fund’s
most
recently
filed
annual
or
semi-annual
report.
Fair
Value
Measurements
The
Fund’s
investments
in
securities
are
recorded
at
their
estimated
fair
value
utilizing
valuation
methods
approved
by
the
Board
of
Directors/
Trustees.
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.
U.S.
GAAP
establishes
the
three-tier
hierarchy
which
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
management’s
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,
credit
spreads,
etc.).
Level
3
–
Prices
are
determined
using
significant
unobservable
inputs
(including
management’s
assumptions
in
determining
the
fair
value
of
investments).
The
following
table
summarizes
the
market
value
of
the
Fund's
investments
as
of
the
end
of
the
reporting
period,
based
on
the
inputs
used
to
value
them:
Shares
Description
(a)
Value
X
–
COMMON
STOCKS
-
1
.1
%
X
7,746,759
Utilities
-
1.1%
96,774
(e),(f)
Energy
Harbor
Corp
$
7,746,759
Total
Utilities
7,746,759
Total
Common
Stocks
(cost
$2,699,742)
7,746,759
Total
Long-Term
Investments
(cost
$635,202,214)
693,569,564
Principal
Amount
(000)
Description
(a)
Optional
Call
Provisions
(b)
Value
SHORT-TERM
INVESTMENTS
-
1.0% 
–
MUNICIPAL
BONDS
-
1
.0
%
X
7,000,000
New
Mexico
-
1.0%
$
7,000
(g)
New
Mexico
Hospital
Equipment
Loan
Council,
Hospital
Revenue
Bonds,
Presbyterian
Healthcare
Services,
Series
2008B,
4.050%,
8/01/34,
(Mandatory
Put
12/29/2023)
12/23
at
100.00
$
7,000,000
Total
New
Mexico
7,000,000
Total
Municipal
Bonds
(cost
$7,000,000)
7,000,000
Total
Short-Term
Investments
(cost
$7,000,000)
7,000,000
Total
Investments
(cost
$
642,202,214
)
-
99
.4
%
700,569,564
Borrowings
-
(0.3)%
(h)
(
2,378,211
)
Other
Assets
&
Liabilities,
Net
-  0.9%
6,337,014
Net
Assets
Applicable
to
Common
Shares
-
100%
$
704,528,367
Level
1
Level
2
Level
3
Total
Long-Term
Investments:
Municipal
Bonds
$
–
$
685,822,805
$
–
$
685,822,805
Common
Stocks
–
7,746,759
–
7,746,759
Short-Term
Investments:
Municipal
Bonds
–
7,000,000
–
7,000,000
Total
$
–
$
700,569,564
$
–
$
700,569,564
Nuveen
Select
Tax-Free
Income
Portfolio
(continued)
Portfolio
of
Investments
December
31,
2023
(Unaudited)
14
NXP
(a)
All
percentages
shown
in
the
Portfolio
of
Investments
are
based
on
net
assets
applicable
to
common
shares
unless
otherwise
noted.
(b)
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.
(c)
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.
(d)
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.
(e)
Energy
Harbor
Corp
(ENGH)
common
stock
received
as
part
of
the
bankruptcy
settlement
during
February
2020
for
Ohio
Water
Development
Authority,
Pollution
Control
Revenue
Refunding
Bonds,FirstEnergy
Nuclear
Generating
Corporation
Project,
Series
2005B,
0.000%,
1/01/34.
Various
funds
and
accounts
managed
by
Nuveen,
including
the
Fund,
collectively
are
a
substantial
minority
holder
of
ENGH’s
outstanding
shares
of
common
stock,
and
possess
certain
other
rights
with
respect
to
the
corporate
governance
of
ENGH.
Due
to
these
facts,
under
the
federal
securities
laws,
the
securities
of
ENGH
held
by
Nuveen
funds
and
accounts,
including
the
Fund,
cannot
be
sold
except
under
limited
conditions
(which
are
not  currently
satisfied).
The
Fund
is
therefore
unable
to
sell
such
shares
in
ordinary
secondary
market
transactions
at
this
time.
On
March
6,
2023
Vistra
Corp.
(“Vistra”)
announced
that
it
has
executed
a
definitive
agreement
with
Energy
Harbor
Corp.,
pursuant
to
which
Energy
Harbor
will
merge
with
and
into
a
newly-formed
subsidiary
of
Vistra.  In
connection
with
the
transaction,
Nuveen
funds
and
accounts
expect
to
receive
a
combination
of
cash
and
shares
in
a
newly
formed
entity.
Nuveen
expects
these
shares
to
be
issued
in
a
private
transaction
and
may
have
reduced
secondary
market
liquidity.  The
transaction
is
subject
to
certain
regulatory
approvals
and
there
can
be
no
assurance
that
the
transaction
will
close.
(f)
Non-income
producing;
issuer
has
not
declared
an
ex-dividend
date
within
the
past
twelve
months.
(g)
Investment
has
a
maturity
of
greater
than
one
year,
but
has
variable
rate
and/or
demand
features
which
qualify
it
as
a
short-term
investment.
The
rate
disclosed,
as
well
as
the
reference
rate
and
spread,
where
applicable,
is
that
in
effect
as
of
the
end
of
the
reporting
period.
This
rate
changes
periodically
based
on
market
conditions
or
a
specified
market
index.
(h)
Borrowings
as
a
percentage
of
Total
Investments
is
0.3%.
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.
AMT
Alternative
Minimum
Tax
ETM
Escrowed
to
maturity