1

Nuveen

Select

Tax-Free

Income

Portfolio

Portfolio

of

Investments

June

30,

2024

(Unaudited)

NXP

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

LONG-TERM

INVESTMENTS

-

99.7% 

X

–

MUNICIPAL

BONDS

-

98

.7

%

X

687,493,550

ALABAMA

-

0.2%

$

1,450

Jefferson

County,

Alabama,

Sewer

Revenue

Warrants,

Series

2024,

5.250%,

10/01/49

10/33

at

100.00

$

1,554,321

TOTAL

ALABAMA

1,554,321

ARIZONA

-

3.4%

Arizona

Industrial

Development

Authority,

Arizona,

Education

Facility

Revenue

Bonds,

Basis

Schools,

Inc.

Projects,

Series

2017F

:

255

3.000%,

7/01/26

No

Opt.

Call

250,148

2,350

5.000%,

7/01/47

7/27

at

100.00

2,383,849

1,950

Glendale

Municipal

Property

Corporation,

Arizona,

Excise

Tax

Revenue

Bonds,

Subordinate

Series

2012C,

4.000%,

7/01/38

8/24

at

100.00

1,950,926

1,000

(c)

Maricopa

County

Industrial

Development

Authority,

Arizona,

Education

Revenue

Bonds,

Legacy

Traditional

Schools

Projects,

Series

2021A,

4.000%,

7/01/51

7/31

at

100.00

848,777

1,465

(c)

Maricopa

County

Industrial

Development

Authority,

Arizona,

Education

Revenue

Bonds,

Legacy

Traditional

Schools

Projects,

Taxable

Series

2019B,

5.000%,

7/01/54

7/29

at

100.00

1,467,567

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

2,052,176

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

1,999,062

1,250

Phoenix

Civic

Improvement

Corporation,

Arizona,

Airport

Revenue

Bonds,

Junior

Lien

Series

2015A,

5.000%,

7/01/34

7/25

at

100.00

1,264,288

3,185

Phoenix

Civic

Improvement

Corporation,

Arizona,

Airport

Revenue

Bonds,

Junior

Lien

Series

2019A,

5.000%,

7/01/44

7/29

at

100.00

3,372,438

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

5,129,227

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

2,627,390

TOTAL

ARIZONA

23,345,848

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

2,213,703

500

Pulaski

County,

Arkansas,

Hospital

Revenue

Bonds,

Arkansas

Children's

Hospital,

Series

2023,

5.000%,

3/01/43

3/33

at

100.00

537,383

TOTAL

ARKANSAS

2,751,086

CALIFORNIA

-

16.5%

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

5,632,790

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

3,312,010

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(Unaudited)

2

NXP

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

CALIFORNIA

(continued)

Anaheim

Public

Financing

Authority,

California,

Lease

Revenue

Bonds,

Public

Improvement

Project,

Series

1997C

:

$

2,840

0.000%,

9/01/30

-

AGM

Insured

No

Opt.

Call

$

2,316,120

6,740

(d)

0.000%,

9/01/35

-

AGM

Insured,

(ETM)

No

Opt.

Call

4,665,015

5,760

0.000%,

9/01/35

-

AGM

Insured

No

Opt.

Call

3,893,875

1,175

Burbank-Glendale-Pasadena

Airport

Authority,

California,

Airport

Revenue

Bonds,

Senior

Series

2024B,

5.250%,

7/01/49,

(AMT)

7/34

at

100.00

1,270,092

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

111,232

2,645

Cypress

Elementary

School

District,

Orange

County,

California,

General

Obligation

Bonds,

Series

2009A,

0.000%,

5/01/34

-

AGM

Insured

No

Opt.

Call

1,879,027

2,440

Eureka

Unified

School

District,

Humboldt

County,

California,

General

Obligation

Bonds,

Series

2002,

0.000%,

8/01/27

-

AGM

Insured

No

Opt.

Call

2,195,361

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

3,262,280

2,275

0.000%,

10/01/28

-

NPFG

Insured

No

Opt.

Call

1,969,434

1,000

Fresno,

California,

Airport

Revenue

Bonds,

Series

2023A,

5.000%,

7/01/53

-

BAM

Insured,

(AMT)

7/33

at

100.00

1,045,920

6,080

(d)

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

5,337,301

6,060

Grossmont

Union

High

School

District,

San

Diego

County,

California,

General

Obligation

Bonds,

Series

2006,

0.000%,

8/01/25

-

NPFG

Insured

No

Opt.

Call

5,838,372

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

1,089,432

4,055

Kern

Community

College

District,

California,

General

Obligation

Bonds,

Series

2003A,

0.000%,

3/01/28

-

FGIC

Insured

No

Opt.

Call

3,575,519

3,480

(e)

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

3,415,079

450

M-S-R

Energy

Authority,

California,

Gas

Revenue

Bonds,

Citigroup

Prepay

Contracts,

Series

2009C,

6.500%,

11/01/39

No

Opt.

Call

570,839

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

9,058,141

1,195

Palmdale

School

District,

Los

Angeles

County,

California,

General

Obligation

Bonds,

Series

2003,

0.000%,

8/01/28

-

AGM

Insured

No

Opt.

Call

1,042,816

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

4,603,967

3,000

0.000%,

8/01/25

-

NPFG

Insured

No

Opt.

Call

2,868,552

8,790

Pittsburg

Redevelopment

Agency,

California,

Tax

Allocation

Bonds,

Los

Medanos

Community

Development

Project,

Series

1999,

0.000%,

8/01/29

-

AMBAC

Insured

No

Opt.

Call

7,300,084

12,240

(d)

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

8,675,160

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

1,132,784

3

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

CALIFORNIA

(continued)

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

$

6,075,217

8,000

0.000%,

8/01/33

No

Opt.

Call

5,844,273

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

2,583,527

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

2,668,154

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

3,760,691

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

1,796,842

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

4,898,246

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

927,750

TOTAL

CALIFORNIA

114,615,902

COLORADO

-

9.5%

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

4,225,281

5,625

Colorado

Bridge

and

Tunnel

Enterprise,

Colorado,

Senior

Infrastructure

Revenue

Bonds,

Series

2024A,

5.250%,

12/01/49

-

AGM

Insured

12/34

at

100.00

6,224,963

150

Colorado

Health

Facilities

Authority,

Colorado,

Revenue

Bonds,

CommonSpirit

Health,

Series

2019A-1,

4.000%,

8/01/44

8/29

at

100.00

146,124

Colorado

Health

Facilities

Authority,

Colorado,

Revenue

Bonds,

CommonSpirit

Health,

Series

2019A-2

:

1,600

5.000%,

8/01/44

8/29

at

100.00

1,648,217

540

4.000%,

8/01/49

8/29

at

100.00

512,964

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

5,120,620

2,475

Colorado

State,

Certificates

of

Participation,

Rural

Series

2020A,

4.000%,

12/15/37

12/30

at

100.00

2,521,559

9,000

Denver

City

and

County,

Colorado,

Airport

System

Revenue

Bonds,

Series

2022A,

5.000%,

11/15/47,

(AMT)

11/32

at

100.00

9,405,401

2,275

Denver

City

and

County,

Colorado,

Airport

System

Revenue

Bonds,

Series

2022D,

5.750%,

11/15/45,

(AMT)

11/32

at

100.00

2,559,964

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

4,599,175

E-470

Public

Highway

Authority,

Colorado,

Senior

Revenue

Bonds,

Series

2000B

:

5,140

0.000%,

9/01/24

-

NPFG

Insured

No

Opt.

Call

5,107,037

8,350

0.000%,

9/01/29

-

NPFG

Insured

No

Opt.

Call

6,904,269

1,295

0.000%,

9/01/32

-

NPFG

Insured

No

Opt.

Call

949,655

4,475

0.000%,

9/01/33

-

NPFG

Insured

No

Opt.

Call

3,144,534

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

6,253,378

Park

Creek

Metropolitan

District,

Colorado,

Senior

Limited

Property

Tax

Supported

Revenue

Bonds,

Refunding

Series

2015A

:

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(Unaudited)

4

NXP

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

COLORADO

(continued)

$

1,000

5.000%,

12/01/33

12/25

at

100.00

$

1,016,866

620

5.000%,

12/01/35

12/25

at

100.00

628,829

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

5,334,326

TOTAL

COLORADO

66,303,162

CONNECTICUT

-

2.2%

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

1,309,595

2,500

Connecticut

Health

and

Educational

Facilities

Authority,

Revenue

Bonds,

Fairfield

University,

Series

2022U,

4.000%,

7/01/52

7/32

at

100.00

2,413,996

5,100

Connecticut

State,

General

Obligation

Bonds,

Green

Series

2014G,

5.000%,

11/15/31

11/24

at

100.00

5,119,310

5,390

Connecticut

State,

Special

Tax

Obligation

Bonds,

Transportation

Infrastructure

Purposes,

Series

2021A,

4.000%,

5/01/40

5/31

at

100.00

5,421,327

750

University

of

Connecticut,

General

Obligation

Bonds,

Series

2015A,

5.000%,

3/15/31

3/26

at

100.00

769,308

TOTAL

CONNECTICUT

15,033,536

DISTRICT

OF

COLUMBIA

-

1.8%

1,500

(d)

Metropolitan

Washington

Airports

Authority,

District

of

Columbia,

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

1,605,636

2,000

Metropolitan

Washington

Airports

Authority,

District

of

Columbia,

Dulles

Toll

Road

Revenue

Bonds,

Dulles

Metrorail

Capital

Appreciation,

Second

Senior

Lien

Series

2010B,

6.500%,

10/01/44

10/28

at

100.00

2,191,037

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

5,324,064

2,450

Metropolitan

Washington

D.C.

Airports

Authority,

Airport

System

Revenue

Bonds,

Refunding

Series

2024A,

5.250%,

10/01/49,

(AMT),

(WI/DD)

10/33

at

100.00

2,631,628

1,070

Washington

Metropolitan

Area

Transit

Authority,

District

of

Columbia,

Dedicated

Revenue

Bonds,

Green

Series

2021A,

4.000%,

7/15/46

7/31

at

100.00

1,044,308

TOTAL

DISTRICT

OF

COLUMBIA

12,796,673

FLORIDA

-

2.9%

Florida

Development

Finance

Corporation,

Revenue

Bonds,

Brightline

Florida

Passenger

Rail

Expansion

Project,

Brightline

Trains

Florida

LLC

Issue,

Series

2024

:

1,000

5.000%,

7/01/41,

(AMT)

7/32

at

100.00

1,036,715

1,700

5.000%,

7/01/44

-

AGM

Insured,

(AMT)

7/32

at

100.00

1,791,608

6,775

(c)

Florida

Development

Finance

Corporation,

Revenue

Bonds,

Brightline

Florida

Passenger

Rail

Expansion

Project,

Series

2023C,

8.250%,

7/01/57,

(AMT),

(Mandatory

Put

8/15/24)

7/24

at

104.50

7,025,210

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

2,044,144

1,545

5.000%,

10/01/47,

(AMT)

10/27

at

100.00

1,569,338

1,500

Lakeland,

Florida,

Hospital

System

Revenue

Bonds,

Lakeland

Regional

Health,

Series

2015,

5.000%,

11/15/45

11/24

at

100.00

1,503,788

5,000

Miami-Dade

County,

Florida,

Aviation

Revenue

Bonds,

Refunding

Series

2017B,

5.000%,

10/01/40,

(AMT)

10/27

at

100.00

5,087,967

TOTAL

FLORIDA

20,058,770

5

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

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

$

3,542,179

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

4,001,047

TOTAL

GEORGIA

7,543,226

GUAM

-

1.3%

7,250

Government

of

Guam,

Business

Privilege

Tax

Bonds,

Refunding

Series

2015D,

5.000%,

11/15/39

11/25

at

100.00

7,292,572

1,460

Guam

Government

Waterworks

Authority,

Water

and

Wastewater

System

Revenue

Bonds,

Series

2016,

5.000%,

1/01/46

7/26

at

100.00

1,484,264

TOTAL

GUAM

8,776,836

HAWAII

-

1.0%

6,895

Hawaii

State,

Airport

System

Revenue

Bonds,

Series

2015A,

5.000%,

7/01/41,

(AMT)

7/25

at

100.00

6,930,387

TOTAL

HAWAII

6,930,387

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

5,374,719

1,600

Boise

State

University,

Idaho,

General

Revenue

Bonds,

Series

2023A,

5.000%,

4/01/48

4/33

at

100.00

1,730,720

10,000

Idaho

Health

Facilities

Authority,

Revenue

Bonds,

Saint

Luke's

Health

System

Project,

Series

2014A,

5.000%,

3/01/44

7/24

at

100.00

10,000,204

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

1,346,468

Idaho

Housing

and

Finance

Association,

Nonprofit

Facilities

Revenue

Bonds,

The

College

of

Idaho

Project,

Series

2023

:

2,000

(c)

5.625%,

11/01/43

11/33

at

100.00

2,065,919

6,000

(c)

5.875%,

11/01/53

11/33

at

100.00

6,167,661

TOTAL

IDAHO

26,685,691

ILLINOIS

-

8.2%

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

2,147,990

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

1,837,368

725

Chicago

Board

of

Education,

Illinois,

General

Obligation

Bonds,

Dedicated

Revenues,

Series

2016B,

6.500%,

12/01/46

12/26

at

100.00

753,731

3,900

Chicago

Board

of

Education,

Illinois,

General

Obligation

Bonds,

Series

1999A,

0.000%,

12/01/28

-

FGIC

Insured

No

Opt.

Call

3,217,329

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

45,451

880

Chicago,

Illinois,

General

Obligation

Bonds,

Project

&

Refunding

Series

2017A,

6.000%,

1/01/38

1/27

at

100.00

915,745

1,500

Chicago,

Illinois,

Midway

Airport

Revenue

Bonds,

Refunding

Senior

Lien

Series

2023C,

5.000%,

1/01/41

1/34

at

100.00

1,590,854

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

5,402,867

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(Unaudited)

6

NXP

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

ILLINOIS

(continued)

$

1,190

Chicago,

Illinois,

Water

Revenue

Bonds,

Second

Lien

Series

2023A,

5.250%,

11/01/53

-

AGM

Insured

5/33

at

100.00

$

1,291,666

2,500

Illinois

Toll

Highway

Authority,

Toll

Highway

Revenue

Bonds,

Senior

Lien

Series

2021A,

4.000%,

1/01/46

1/32

at

100.00

2,417,322

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

1,381,610

765

0.000%,

6/15/30

9/23

at

67.44

600,985

45

(d)

0.000%,

6/15/30,

(ETM)

No

Opt.

Call

36,676

2,500

0.000%,

12/15/30

-

NPFG

Insured

No

Opt.

Call

1,924,088

17,195

0.000%,

12/15/31

-

NPFG

Insured

No

Opt.

Call

12,712,172

1,350

0.000%,

6/15/35

-

NPFG

Insured

No

Opt.

Call

864,981

15,000

0.000%,

12/15/36

-

NPFG

Insured

No

Opt.

Call

8,972,304

2,000

0.000%,

6/15/37

-

NPFG

Insured

No

Opt.

Call

1,168,504

9,370

0.000%,

6/15/39

-

NPFG

Insured

No

Opt.

Call

4,923,244

5,000

Springfield,

Illinois,

Electric

Revenue

Bonds,

Refunding

Senior

Lien

Series

2015,

5.000%,

3/01/28

3/25

at

100.00

5,043,000

TOTAL

ILLINOIS

57,247,887

INDIANA

-

1.4%

1,600

Indiana

Bond

Bank,

Special

Program

Bonds,

Carmel

Junior

Waterworks

Project,

Series

2008B,

0.000%,

6/01/30

-

AGM

Insured

No

Opt.

Call

1,269,132

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

2,055,967

5,060

Indiana

Finance

Authority,

Hospital

Revenue

Bonds,

Marion

General

Hospital

Project,

Series

2020A,

4.000%,

7/01/45

7/30

at

100.00

4,701,749

500

Northern

Indiana

Commuter

Transportation

District,

Indiana,

Limited

Obligation

Revenue

Bonds,

Series

2024,

5.250%,

1/01/49

7/34

at

100.00

547,720

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

862,085

TOTAL

INDIANA

9,436,653

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

1,231,285

TOTAL

IOWA

1,231,285

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

939,867

TOTAL

KENTUCKY

939,867

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

1,925,884

TOTAL

LOUISIANA

1,925,884

MASSACHUSETTS

-

4.6%

Massachusetts

Development

Finance

Agency,

Revenue

Bonds,

Boston

University,

Series

2016BB-1

:

10,000

4.000%,

10/01/46

10/26

at

100.00

9,790,094

2,230

5.000%,

10/01/46

10/26

at

100.00

2,278,210

7

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

MASSACHUSETTS

(continued)

$

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

$

6,599,164

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

537,562

3,000

Massachusetts

State,

General

Obligation

Bonds,

Consolidated

Loan,

Series

2015B,

4.000%,

5/01/45

5/23

at

100.00

2,972,368

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

2,480,680

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

5,319,174

1,000

Newburyport,

Massachusetts,

General

Obligation

Bonds,

Municipal

Purpose

Loan,

Refunding

Series

2013,

4.000%,

1/15/30

7/24

at

100.00

1,000,063

University

of

Massachusetts

Building

Authority,

Project

Revenue

Bonds,

Senior

Series

2014-1

:

480

5.000%,

11/01/39

11/24

at

100.00

481,495

255

(d)

5.000%,

11/01/39,

(Pre-refunded

11/01/24)

11/24

at

100.00

256,267

220

(d)

5.000%,

11/01/39,

(Pre-refunded

11/01/24)

11/24

at

100.00

221,093

210

(d)

5.000%,

11/01/39,

(Pre-refunded

11/01/24)

11/24

at

100.00

211,044

TOTAL

MASSACHUSETTS

32,147,214

MICHIGAN

-

1.6%

5,000

Lansing

Board

of

Water

and

Light,

Michigan,

Utility

System

Revenue

Bonds,

Refunding

Series

2024A,

5.250%,

7/01/54

7/34

at

100.00

5,543,077

385

Michigan

State

Building

Authority,

Revenue

Bonds,

Facilities

Program,

Refunding

Series

2015-I,

5.000%,

4/15/38

10/25

at

100.00

390,208

4,000

Michigan

State

Building

Authority,

Revenue

Bonds,

Facilities

Program,

Refunding

Series

2016-I,

5.000%,

4/15/35

10/26

at

100.00

4,124,185

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

1,104,417

TOTAL

MICHIGAN

11,161,887

MINNESOTA

-

0.8%

1,500

Minnesota

Agricultural

and

Economic

Development

Board,

Health

Care

Facilities

Revenue

Bonds,

Essentia

Health

Obligated

Group,

Series

2024A,

5.250%,

1/01/54

1/34

at

100.00

1,619,080

3,850

Saint

Paul

Housing

&

Redevelopment

Authority,

Minnesota,

Charter

School

Lease

Revenue

Bonds,

Hmong

College

Prep

Academy

Project,

Series

2016A,

6.000%,

9/01/51

9/26

at

100.00

3,923,861

TOTAL

MINNESOTA

5,542,941

MISSOURI

-

2.7%

5,000

Jackson

County,

Missouri,

Special

Obligation

Bonds,

Series

2023A,

5.250%,

12/01/47

12/33

at

100.00

5,440,570

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

7,111,192

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

4,026,135

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(Unaudited)

8

NXP

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

MISSOURI

(continued)

$

2,000

Missouri

Health

and

Educational

Facilities

Authority,

Health

Facilities

Revenue

Bonds,

CoxHealth,

Series

2013A,

5.000%,

11/15/38

7/24

at

100.00

$

2,001,087

TOTAL

MISSOURI

18,578,984

NEBRASKA

-

1.5%

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

3,741,090

3,000

Douglas

County

Hospital

Authority

2,

Nebraska,

Health

Facilities

Revenue

Bonds,

Children's

Hospital

Obligated

Group,

Series

2017,

5.000%,

11/15/47

5/27

at

100.00

3,038,068

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

541,081

2,700

5.000%,

11/01/45

11/25

at

100.00

2,722,249

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

251,672

305

5.000%,

7/01/27

7/25

at

100.00

307,010

TOTAL

NEBRASKA

10,601,170

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

1,750,630

3,000

Las

Vegas

Valley

Water

District,

Nevada,

General

Obligation

Bonds,

Refunding

Series

2015,

5.000%,

6/01/34

12/24

at

100.00

3,018,991

TOTAL

NEVADA

4,769,621

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

2,247,814

TOTAL

NEW

HAMPSHIRE

2,247,814

NEW

JERSEY

-

5.3%

3,495

Delaware

River

Port

Authority,

New

Jersey

and

Pennsylvania,

Revenue

Bonds,  Series

2013,

5.000%,

1/01/37

7/24

at

100.00

3,503,637

940

New

Jersey

Economic

Development

Authority,

Private

Activity

Bonds,

The

Goethals

Bridge

Replacement

Project,

Series

2013,

5.125%,

1/01/39

-

AGM

Insured,

(AMT)

7/24

at

100.00

940,823

2,000

(d)

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

2,111,558

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

308,552

260

5.000%,

7/01/29

-

AGM

Insured

7/25

at

100.00

263,057

New

Jersey

Transportation

Trust

Fund

Authority,

Transportation

System

Bonds,

Refunding

Series

2006C

:

4,900

0.000%,

12/15/28

-

AMBAC

Insured

No

Opt.

Call

4,164,811

35,000

0.000%,

12/15/34

-

AGM

Insured

No

Opt.

Call

23,687,114

2,000

New

Jersey

Transportation

Trust

Fund

Authority,

Transportation

System

Bonds,

Series

2015AA,

5.250%,

6/15/29

6/25

at

100.00

2,029,912

TOTAL

NEW

JERSEY

37,009,464

9

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

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

$

1,017,200

3,000

New

Mexico

Mortgage

Finance

Authority,

Multifamily

Housing

Revenue

Bonds,

St

Anthony,

Series

2007A,

5.250%,

9/01/42,

(AMT)

7/24

at

100.00

3,006,935

1,035

University

of

New

Mexico,

Revenue

Bonds,

Refunding

&

Improvement

Subordinate

Lien

Series

2016A,

4.500%,

6/01/36

6/26

at

100.00

1,049,041

TOTAL

NEW

MEXICO

5,073,176

NEW

YORK

-

3.7%

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

2,007,412

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

1,275,046

3,775

New

York

City

Municipal

Water

Finance

Authority,

New

York,

Water

and

Sewer

System

Second

General

Resolution

Revenue

Bonds,

Fiscal

2024

Series

BB-2,

5.250%,

6/15/47

12/33

at

100.00

4,209,012

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

9,825,926

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

2,669,157

5,000

Triborough

Bridge

and

Tunnel

Authority,

New

York,

Sales

Tax

Revenue

Bonds,

MTA

Bridges

&

Tunnels,

TBTA

Capital

Lockbox-City

Sales

Tax,

Series

2024A-1,

5.250%,

5/15/59

5/34

at

100.00

5,507,024

TOTAL

NEW

YORK

25,493,577

NORTH

CAROLINA

-

0.1%

1,000

Charlotte,

North

Carolina,

Airport

Revenue

Bonds,

Charlotte

Douglas

International,

Series

2023B,

5.000%,

7/01/48,

(AMT)

7/33

at

100.00

1,055,709

TOTAL

NORTH

CAROLINA

1,055,709

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

923,246

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

241,575

TOTAL

OHIO

1,164,821

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

1,258,708

5,000

Oklahoma

State

Turnpike

Authority,

Turnpike

System

Revenue

Bonds,

Second

Senior

Series

2023,

5.500%,

1/01/53

1/32

at

100.00

5,523,120

TOTAL

OKLAHOMA

6,781,828

OREGON

-

2.8%

500

Astoria

Hospital

Facilities

Authority,

Oregon,

Hospital

Revenue

Bonds,

Columbia

Memorial

Hospital

Project,

Series

2024,

5.250%,

8/01/54

2/34

at

100.00

529,463

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

1,563,467

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(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

$

61,804

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

469,720

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

917,430

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

2,203,790

2,000

Oregon

Facilities

Authority,

Revenue

Bonds,

Willamette

University,

Refunding

Series

2016B,

5.000%,

10/01/40

10/26

at

100.00

2,012,918

5,000

Oregon

Health

and

Science

University,

Revenue

Bonds,

Green

Series

2021A,

4.000%,

7/01/44

1/32

at

100.00

4,898,591

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

2,527,293

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

787,081

Yamhill

County,

Oregon,

Revenue

Bonds,

George

Fox

University

Project,

Refunding

Series

2021

:

1,500

4.000%,

12/01/36

12/31

at

100.00

1,509,567

1,875

4.000%,

12/01/41

12/31

at

100.00

1,837,152

TOTAL

OREGON

19,318,276

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

1,293,657

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

5,053,693

65

(d)

5.000%,

6/15/31,

(Pre-refunded

6/15/26)

6/26

at

100.00

66,869

TOTAL

PENNSYLVANIA

6,414,219

PUERTO

RICO

-

2.5%

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

6,984,921

2,550

4.750%,

7/01/53

7/28

at

100.00

2,524,632

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

3,959,920

3,624

4.784%,

7/01/58

7/28

at

100.00

3,584,353

536

Puerto

Rico,

General

Obligation

Bonds,

Clawback

Highway

Transportation

Authority

Claims

Taxable

Series

2022,

0.000%,

11/01/51

No

Opt.

Call

338,691

TOTAL

PUERTO

RICO

17,392,517

SOUTH

CAROLINA

-

0.3%

1,940

South

Carolina

State

Ports

Authority,

Revenue

Bonds,

Series

2018,

5.000%,

7/01/48,

(AMT)

7/28

at

100.00

1,973,823

TOTAL

SOUTH

CAROLINA

1,973,823

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

1,016,022

TOTAL

SOUTH

DAKOTA

1,016,022

11

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

TENNESSEE

-

1.1%

$

2,195

Metropolitan

Government

of

Nashville

and

Davidson

County

Sports

Authority,

Tennessee,

Revenue

Bonds,

Stadium

Project,

Subordinate

Senior

Series

2023A,

5.250%,

7/01/56

-

AGM

Insured

1/34

at

100.00

$

2,372,909

5,000

Metropolitan

Nashville

Airport

Authority,

Tennessee,

Airport

Revenue

Bonds,

Subordinate

Series

2019B,

5.000%,

7/01/49,

(AMT)

7/30

at

100.00

5,151,854

TOTAL

TENNESSEE

7,524,763

TEXAS

-

7.0%

Central

Texas

Regional

Mobility

Authority,

Revenue

Bonds,

Senior

Lien,

Series

2015A

:

110

(d)

5.000%,

1/01/33,

(Pre-refunded

7/01/25)

7/25

at

100.00

111,842

85

(d)

5.000%,

1/01/34,

(Pre-refunded

7/01/25)

7/25

at

100.00

86,424

240

(d)

5.000%,

1/01/35,

(Pre-refunded

7/01/25)

7/25

at

100.00

244,019

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

1,167,048

Harris

County-Houston

Sports

Authority,

Texas,

Revenue

Bonds,

Junior

Lien

Series

2001H

:

520

0.000%,

11/15/24

-

NPFG

Insured

No

Opt.

Call

511,791

110

(d)

0.000%,

11/15/24

-

NPFG

Insured,

(ETM)

No

Opt.

Call

108,314

2,935

0.000%,

11/15/30

-

NPFG

Insured

No

Opt.

Call

2,246,690

480

(d)

0.000%,

11/15/30

-

NPFG

Insured,

(ETM)

No

Opt.

Call

378,606

1,405

0.000%,

11/15/32

-

NPFG

Insured

11/31

at

94.05

963,214

2,510

0.000%,

11/15/36

-

NPFG

Insured

11/31

at

73.51

1,324,775

12,480

0.000%,

11/15/41

-

NPFG

Insured

11/31

at

53.78

4,660,318

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

1,377,390

4,230

0.000%,

11/15/35

-

NPFG

Insured

11/24

at

52.47

2,180,218

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

1,875,226

8,110

0.000%,

11/15/38

-

NPFG

Insured

11/30

at

61.17

3,832,574

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

571,114

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

5,876,635

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

14,398,391

1,500

Midland

Independent

School

District,

Midland

County,

Texas,

General

Obligation

Bonds,

School

Building

Series

2024,

5.000%,

2/15/50

2/28

at

100.00

1,553,826

430

(c)

Mission

Economic

Development

Corporation,

Texas,

Revenue

Bonds,

Natgasoline

Project,

Senior

Lien

Series

2018,

4.625%,

10/01/31,

(AMT)

7/24

at

103.00

426,707

North

Texas

Tollway

Authority,

System

Revenue

Bonds,

Refunding

First

Tier

Capital

Appreciation

Series

2008I

:

290

(d)

6.200%,

1/01/42,

(Pre-refunded

1/01/25)

-

AGC

Insured

1/25

at

100.00

294,010

2,000

(d)

6.500%,

1/01/43,

(Pre-refunded

1/01/25)

1/25

at

100.00

2,030,106

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

194,432

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

2,308,665

TOTAL

TEXAS

48,722,335

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(Unaudited)

12

NXP

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

Principal

Amount

(000)

Description

(a)

Optional

Call

Provisions

(b)

Value

UTAH

-

0.3%

$

2,095

Millard

School

District,

Lease

Revenue

Bonds,

Local

Building

Authority

Series

2024,

5.000%,

5/15/49

-

BAM

Insured

5/34

at

100.00

$

2,263,343

TOTAL

UTAH

2,263,343

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

1,702,197

TOTAL

VIRGIN

ISLANDS

1,702,197

WASHINGTON

-

5.0%

5,000

Port

of

Seattle,

Washington,

Revenue

Bonds,

Intermediate

Lien

Series

2019,

5.000%,

4/01/44,

(AMT)

4/29

at

100.00

5,116,997

3,485

Port

of

Seattle,

Washington,

Revenue

Bonds,

Refunding

Intermediate

Lien

Series

2021C,

5.000%,

8/01/46,

(AMT)

8/31

at

100.00

3,649,632

4,000

Washington

Health

Care

Facilities

Authority,

Revenue

Bonds,

Providence

Health

&

Services,

Refunding

Series

2012A,

5.000%,

10/01/32

7/24

at

100.00

4,007,776

5,000

Washington

Health

Care

Facilities

Authority,

Revenue

Bonds,

Providence

Health

&

Services,

Series

2014D,

5.000%,

10/01/38

10/24

at

100.00

4,999,987

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

7,627,547

5,710

Washington

State,

General

Obligation

Bonds,

Various

Purpose

Series

2015B,

5.000%,

2/01/37

2/25

at

100.00

5,753,764

2,060

Washington

State,

General

Obligation

Bonds,

Various

Purpose

Series

2016A-1,

5.000%,

8/01/39

8/25

at

100.00

2,085,180

2,115

Washington

State,

Motor

Vehicle

Fuel

Tax

General

Obligation

Bonds,

Series

2003F,

0.000%,

12/01/27

-

NPFG

Insured

No

Opt.

Call

1,881,489

TOTAL

WASHINGTON

35,122,372

WISCONSIN

-

1.0%

3,290

Wisconsin

Health

and

Educational

Facilities

Authority,

Revenue

Bonds,

Mercy

Alliance,

Inc.,

Series

2012,

5.000%,

6/01/39

7/24

at

100.00

3,291,164

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

3,947,299

TOTAL

WISCONSIN

7,238,463

TOTAL

MUNICIPAL

BONDS

(cost

$646,581,386)

687,493,550

Shares

Description

(a)

Value

X

–

COMMON

STOCKS

-

1

.0

%

X

7,014,096

UTILITIES

-

1.0%

2,770

(f),(g),(h)

Vistra

Vision

Corporation

Private

Equity

$

7,014,096

TOTAL

UTILITIES

7,014,096

TOTAL

COMMON

STOCKS

(cost

$2,699,742)

7,014,096

TOTAL

LONG-TERM

INVESTMENTS

(cost

$649,281,128)

694,507,646

OTHER

ASSETS

&

LIABILITIES,

NET

-  0.3%

1,759,559

NET

ASSETS

APPLICABLE

TO

COMMON

SHARES

-

100%

$

696,267,205

13

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:

The

following

is

a

reconciliation

of

the

Fund’s

Level

3

investments

held

at

the

beginning

and

end

of

the

measurement

period:

The

valuation

techniques

and

significant

unobservable

inputs

used

in

recurring

Level

3

fair

value

measurements

of

assets

as

of

the

end

of

the

report-

ing

period,

were

as

follows:

Level

1

Level

2

Level

3

Total

Long-Term

Investments:

Municipal

Bonds

$

–

$

687,493,550

$

–

$

687,493,550

Common

Stocks

–

–

7,014,096

7,014,096

Total

$

–

$

687,493,550

$

7,014,096

$

694,507,646

NXP

Level

3

Common

Stocks

Balance

at

the

beginning

of

period

$6,149,799

Gains

(losses):

Net

realized

gains

(losses)

-

Change

in

net

unrealized

appreciation

(depreciation)

864,297

Purchases

at

cost

-

Sales

at

proceeds

-

Net

discounts

(premiums)

-

Transfers

into

-

Transfers

(out

of)

-

Balance

at

the

end

of

period

$7,014,096

Change

in

net

unrealized

appreciation

(depreciation)

during

the

period

of

Level

3

securities

held

as

of

period

end

$864,297

Fund

Asset

Class

Market

Value

Techniques

Unobservable

Inputs

Range

Weighted

Average

NXP

Common

Stocks

$7,014,096

Enterprise

Value

EBITDA

Multiples

10.50-12.50

N/A

(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)

Security

is

exempt

from

registration

under

Rule

144A

of

the

Securities

Act

of

1933,

as

amended.

These

securities

are

deemed

liquid

and

may

be

resold

in

transactions

exempt

from

registration,

which

are

normally

those

transactions

with

qualified

institutional

buyers.

As

of

the

end

of

the

reporting

period,

the

aggregate

value

of

these

securities

is

$18,001,841

or

2.6%

of

Total

Investments.

(d)

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.

(e)

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.

(f)

For

fair

value

measurement

disclosure

purposes,

investment

classified

as

Level

3.

Nuveen

Select

Tax-Free

Income

Portfolio

(continued)

Portfolio

of

Investments

June

30,

2024

(Unaudited)

14

NXP

(g)

On

March

1,

2024,

Vistra

Corp.

(“Vistra”)

completed

its

acquisition

of

Energy

Harbor

Corp

(“ENGH”).  ENGH

has

been

merged

into

a

newly

formed

subsidiary

of

Vistra,

Vistra

Vision.  In

connection

with

the

transaction,

holders

of

ENGH

common

stock

received

a

combination

of

cash

and

membership

interests

in

Vistra

Vision.  

These

Vistra

Vision

interests

were

issued

in

a

private

transaction

and

may

have

reduced

secondary

market

liquidity.

(h)

Non-income

producing;

issuer

has

not

declared

an

ex-dividend

date

within

the

past

twelve

months.

AMT

Alternative

Minimum

Tax

ETM

Escrowed

to

maturity

WI/DD

When-issued

or

delayed

delivery

security.