1
Nuveen
Senior
Income
Fund
Portfolio
of
Investments
April
30,
2023
(Unaudited)
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
LONG-TERM
INVESTMENTS
-
165.9%  
(100.0%
of
Total
Investments) 
X
277,218,832
VARIABLE
RATE
SENIOR
LOAN
INTERESTS
-
135.8%
(81.9%
of
Total
Investments)
(2)
X
277,218,832
Aerospace
&
Defense
-
1.1%
(0.7%
of
Total
Investments)
$
676
TransDigm,
Inc.,
Term
Loan
H
8.148%
SOFR90A
3.250%
2/22/27
Ba3
$
677,885
1,588
TransDigm,
Inc.,
Term
Loan
I
8.148%
SOFR90A
3.250%
8/24/28
Ba3
1,588,504
Total
Aerospace
&
Defense
2,266,389
Automobile
Components
-
1.0%
(0.6%
of
Total
Investments)
78
Adient
US
LLC,
Term
Loan
B
8.268%
1-Month
LIBOR
3.250%
4/08/28
BB+
78,426
515
Clarios
Global
LP,
Term
Loan
,
(WI/DD)
TBD
TBD
TBD
TBD
B+
514,784
1,268
Clarios
Global
LP,
Term
Loan
B
8.275%
1-Month
LIBOR
3.250%
4/30/26
B+
1,266,886
137
DexKo
Global
Inc.,
Term
Loan
B
8.909%
3-Month
LIBOR
3.750%
10/04/28
B2
130,491
Total
Automobile
Components
1,990,587
Beverages
-
1.9%
(1.1%
of
Total
Investments)
606
Arterra
Wines
Canada,
Inc.,
Term
Loan
8.659%
3-Month
LIBOR
3.500%
11/25/27
B
593,235
671
City
Brewing
Company,
LLC,
Term
Loan
8.760%
3-Month
LIBOR
3.500%
4/05/28
CCC
278,848
843
Naked
Juice
LLC,
Term
Loan
8.248%
SOFR90A
3.250%
1/20/29
B2
753,747
82
Naked
Juice
LLC,
Term
Loan,
Second
Lien
10.998%
SOFR90A
6.000%
1/20/30
CCC
63,330
1,122
Sunshine
Investments
B.V.,
Term
Loan
9.011%
SOFR90A
4.250%
5/05/29
B+
1,115,875
1,077
Triton
Water
Holdings,
Inc,
Term
Loan
8.659%
3-Month
LIBOR
3.500%
3/31/28
B
1,023,278
Total
Beverages
3,828,313
Biotechnology
-
1.1%
(0.7%
of
Total
Investments)
2,269
Grifols
Worldwide
Operations
USA,
Inc.,
Term
Loan
B
7.025%
1-Month
LIBOR
2.000%
11/15/27
BB+
2,211,793
Total
Biotechnology
2,211,793
Broadline
Retail
-
0.2%
(0.1%
of
Total
Investments)
247
Belk,
Inc.,
Term
Loan
12.458%
1-Month
LIBOR
7.500%
7/31/25
CCC
210,412
1,217
Belk,
Inc.,
Term
Loan
,
(cash
5.000%,
PIK
8.000%)
13.000%
3-Month
LIBOR
13.000%
7/31/25
C
200,731
Total
Broadline
Retail
411,143
Building
Products
-
1.7%
(1.0%
of
Total
Investments)
1,704
Chamberlain
Group
Inc,
Term
Loan
B
8.275%
1-Month
LIBOR
3.250%
10/22/28
B
1,657,153
229
Cornerstone
Building
Brands,
Inc.,
Term
Loan
B
8.240%
TSFR1M
3.250%
4/12/28
B
207,890
1,041
Quikrete
Holdings,
Inc.,
Term
Loan,
First
Lien
7.650%
1-Month
LIBOR
2.625%
1/31/27
Ba2
1,036,439
330
Standard
Industries
Inc.,
Term
Loan
B
7.329%
TSFR1M
2.250%
9/22/28
BBB-
329,122
177
Zurn
Holdings,
Inc.,
Term
Loan
B
7.025%
1-Month
LIBOR
2.000%
10/04/28
BB+
177,399
Total
Building
Products
3,408,003
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
2
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Capital
Markets
-
0.4%
(0.2%
of
Total
Investments)
$
770
Motion
Finco
Sarl,
Term
Loan
B1
,
(DD1)
8.409%
3-Month
LIBOR
3.250%
11/04/26
B
$
760,618
Total
Capital
Markets
760,618
Chemicals
-
3.1%
(1.9%
of
Total
Investments)
317
ASP
Unifrax
Holdings
Inc,
Term
Loan
B
8.909%
3-Month
LIBOR
3.750%
12/12/25
BB
293,031
94
Avient
Corporation,
Term
Loan
B
8.295%
SOFR90A
3.250%
8/29/29
BB+
94,788
712
Axalta
Coating
Systems
Dutch
Holding
B
B.V,
Term
Loan
B
8.068%
SOFR90A
3.000%
12/08/29
BBB-
715,507
299
Diamond
(BC)
B.V.,
Term
Loan
B
7.952%
SOFR30A
+
SOFR90A
2.750%
9/29/28
Ba3
299,370
843
Discovery
Purchaser
Corporation,
Term
Loan
9.284%
TSFR3M
4.375%
8/03/29
B-
809,088
500
H.B.
Fuller
Company,
Term
Loan
B
7.482%
SOFR30A
2.500%
2/08/30
BBB-
503,283
250
INEOS
Quattro
Holdings
UK
Ltd,
Term
Loan
8.832%
SOFR30A
3.750%
3/03/30
BB
250,000
391
INEOS
Styrolution
US
Holding
LLC,
Term
Loan
B
7.847%
1-Month
LIBOR
2.750%
1/29/26
BB+
389,457
900
Ineos
US
Finance
LLC,
Term
Loan
B
8.568%
SOFR90A
3.500%
2/09/30
BB
899,249
84
Kraton
Corporation,
Term
Loan
8.544%
SOFR90A
3.250%
3/15/29
BB
84,158
110
Starfruit
Finco
B.V,
Term
Loan
8.990%
SOFR90A
4.000%
3/03/28
B+
109,862
733
Starfruit
Finco
B.V,
Term
Loan
B
7.895%
SOFR90A
2.750%
10/01/25
BB-
731,474
1,114
Trinseo
Materials
Operating
S.C.A.,
Term
Loan
,
(DD1)
7.025%
1-Month
LIBOR
2.000%
9/09/24
Ba2
1,100,626
Total
Chemicals
6,279,893
Commercial
Services
&
Supplies
-
3.0%
(1.8%
of
Total
Investments)
714
Amentum
Government
Services
Holdings
LLC,
Term
Loan
8.764%
SOFR90A
4.000%
2/07/29
B
687,803
339
Anticimex
International
AB,
Term
Loan
B1
8.453%
3-Month
LIBOR
3.500%
11/16/28
B
336,315
662
Covanta
Holding
Corporation,
Term
Loan
B
7.496%
SOFR30A
2.500%
11/30/28
Ba1
660,215
50
Covanta
Holding
Corporation,
Term
Loan
C
7.496%
SOFR30A
2.500%
11/30/28
Ba1
49,479
433
Garda
World
Security
Corporation,
Term
Loan
B
9.296%
SOFR30A
4.250%
10/30/26
BB+
432,672
1,019
GFL
Environmental
Inc.,
Term
Loan
8.145%
SOFR30A
3.000%
5/31/27
BB-
1,020,689
1,312
Prime
Security
Services
Borrower,
LLC,
Term
Loan
,
(DD1)
7.608%
3-Month
LIBOR
2.750%
9/23/26
BB-
1,311,546
298
Vertical
US
Newco
Inc,
Term
Loan
B
8.602%
6-Month
LIBOR
3.500%
7/31/27
B+
290,970
947
West
Corporation,
Term
Loan
B3
9.068%
SOFR90A
4.000%
4/10/27
B1
855,340
481
WIN
Waste
Innovations
Holdings,
Inc.,
Term
Loan
B
7.847%
SOFR30A
2.750%
3/25/28
B
458,576
Total
Commercial
Services
&
Supplies
6,103,605
3
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Communications
Equipment
-
2.0%
(1.2%
of
Total
Investments)
$
161
Avaya,
Inc.,
Term
Loan
B
(5)
9.090%
1-Month
LIBOR
4.250%
12/15/27
D
$
38,640
1,247
CommScope,
Inc.,
Term
Loan
B
,
(DD1)
8.275%
1-Month
LIBOR
3.250%
4/04/26
B1
1,158,839
1,227
Delta
TopCo,
Inc.,
Term
Loan
B
8.656%
TSFR3M
3.750%
12/01/27
B2
1,176,688
258
EOS
Finco
Sarl,
Term
Loan
10.909%
TSFR3M
6.000%
8/03/29
B
256,975
856
MLN
US
HoldCo
LLC,
Term
Loan
11.782%
TSFR3M
6.700%
10/18/27
CCC+
491,875
1,473
MLN
US
HoldCo
LLC,
Term
Loan,
First
Lien
9.557%
3-Month
LIBOR
4.500%
11/30/25
CCC-
406,826
1,004
Riverbed
Technology,
Inc.,
Exit
Term
Loan
,
(cash
7.000%,
PIK
2.000%)
1.000%
3
+
12
Month
LIBOR
1.000%
12/07/26
Caa3
313,913
248
ViaSat,
Inc.,
Term
Loan
9.597%
SOFR30A
4.500%
3/04/29
BB+
241,519
Total
Communications
Equipment
4,085,275
Construction
&
Engineering
-
0.6%
(0.4%
of
Total
Investments)
107
Aegion
Corporation,
Term
Loan
9.775%
1-Month
LIBOR
4.750%
5/17/28
B
104,992
613
Centuri
Group,
Inc,
Term
Loan
B
7.489%
1
+
3
Month
LIBOR
2.500%
8/27/28
Ba2
609,249
358
Osmose
Utilities
Services,
Inc.,
Term
Loan
8.275%
1-Month
LIBOR
3.250%
6/22/28
B
347,595
216
Pike
Corporation,
Term
Loan
B
8.097%
1-Month
LIBOR
3.000%
1/21/28
Ba3
215,647
Total
Construction
&
Engineering
1,277,483
Consumer
Finance
-
0.8%
(0.5%
of
Total
Investments)
1,722
Fleetcor
Technologies
Operating
Company,
LLC,
Term
Loan
B4
6.775%
1-Month
LIBOR
1.750%
4/30/28
BB+
1,706,566
Total
Consumer
Finance
1,706,566
Consumer
Staples
Distribution
&
Retail
-
0.6%
(0.4%
of
Total
Investments)
949
US
Foods,
Inc.,
Term
Loan
B
,
(DD1)
7.025%
1-Month
LIBOR
2.000%
9/13/26
BB
947,772
370
US
Foods,
Inc.,
Term
Loan
B
7.775%
1-Month
LIBOR
2.750%
11/22/28
BB
370,708
Total
Consumer
Staples
Distribution
&
Retail
1,318,480
Containers
&
Packaging
-
2.5%
(1.5%
of
Total
Investments)
867
Berry
Global,
Inc.,
Term
Loan
Z
6.640%
1-Month
LIBOR
1.750%
7/01/26
BBB-
866,497
611
Charter
NEX
US,
Inc.,
Term
Loan
8.847%
SOFR30A
3.750%
12/01/27
B
603,921
1,104
Clydesdale
Acquisition
Holdings
Inc,
Term
Loan
B
9.257%
SOFR30A
4.175%
3/30/29
B
1,080,607
41
Klockner-Pentaplast
of
America,
Inc.,
Term
Loan
B
10.129%
SOFR180A
4.750%
2/09/26
B2
37,491
492
Reynolds
Group
Holdings
Inc.
,
Term
Loan
B
,
(DD1)
8.347%
SOFR30A
3.250%
9/24/28
B+
488,284
599
Reynolds
Group
Holdings
Inc.
,
Term
Loan
B2
8.347%
SOFR30A
3.250%
2/05/26
B+
598,118
1,493
TricorBraun
Holdings,
Inc.,
Term
Loan
8.275%
1-Month
LIBOR
3.250%
3/03/28
B2
1,459,556
Total
Containers
&
Packaging
5,134,474
Diversified
Consumer
Services
-
0.6%
(0.4%
of
Total
Investments)
333
GT
Polaris,
Inc.,
Term
Loan
9.023%
1-Month
LIBOR
3.750%
9/24/27
BB-
309,673
1,073
Spin
Holdco
Inc.,
Term
Loan
8.986%
3-Month
LIBOR
4.000%
3/04/28
B-
888,606
Total
Diversified
Consumer
Services
1,198,279
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
4
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Diversified
Financial
Services
-
0.0%
(0.0%
of
Total
Investments)
$
894
Ditech
Holding
Corporation,
Term
Loan
(5)
0.000%
N/A
N/A
12/19/22
N/R
$
53,656
Total
Diversified
Financial
Services
53,656
Diversified
Telecommunication
Services
-
3.3%
(2.0%
of
Total
Investments)
581
Altice
France
S.A.,
Term
Loan
B12
8.948%
3-Month
LIBOR
3.688%
1/31/26
B2
561,406
2,874
Altice
France
S.A.,
Term
Loan
B13
8.864%
3-Month
LIBOR
4.000%
8/14/26
B2
2,795,658
865
CenturyLink,
Inc.,
Term
Loan
B
7.347%
SOFR30A
2.250%
3/15/27
BB
591,494
634
Connect
Finco
Sarl,
Term
Loan
B
8.530%
1-Month
LIBOR
3.500%
12/12/26
B+
632,207
422
Cyxtera
DC
Holdings,
Inc.,
Term
Loan
B
8.068%
3-Month
LIBOR
3.000%
5/01/24
CCC+
316,525
1,718
Frontier
Communications
Corp.,
Term
Loan
B
8.813%
1-Month
LIBOR
3.750%
10/08/27
BB+
1,645,861
195
Zayo
Group
Holdings,
Inc.,
Term
Loan
,
(WI/DD)
TBD
TBD
TBD
TBD
B2
159,142
Total
Diversified
Telecommunication
Services
6,702,293
Electric
Utilities
-
0.9%
(0.5%
of
Total
Investments)
530
ExGen
Renewables
IV,
LLC,
Term
Loan
7.460%
3-Month
LIBOR
2.500%
12/15/27
BB-
528,930
294
Pacific
Gas
&
Electric
Company,
Term
Loan
8.025%
1-Month
LIBOR
3.000%
6/23/25
BB+
293,701
970
Talen
Energy
Supply,
LLC,
Term
Loan
B
(5)
8.775%
1-Month
LIBOR
3.750%
7/08/26
N/R
988,706
Total
Electric
Utilities
1,811,337
Electronic
Equipment,
Instruments
&
Components
-
1.2%
(0.7%
of
Total
Investments)
669
II-VI
Incorporated,
Term
Loan
B
7.847%
SOFR30A
2.750%
7/01/29
BBB-
667,538
998
Ingram
Micro
Inc.,
Term
Loan
B
8.659%
3-Month
LIBOR
3.500%
7/02/28
BB+
979,136
759
TTM
Technologies,
Inc.,
Term
Loan
7.348%
1-Month
LIBOR
2.500%
9/28/24
BB+
760,157
Total
Electronic
Equipment,
Instruments
&
Components
2,406,831
Entertainment
-
1.5%
(0.9%
of
Total
Investments)
871
AMC
Entertainment
Holdings,
Inc.
,
Term
Loan
B
7.946%
1-Month
LIBOR
3.000%
4/22/26
B-
670,196
2,552
Crown
Finance
US,
Inc.,
Term
Loan
,
(DD1)(5)
0.000%
N/A
N/A
2/28/25
D
471,158
294
Crown
Finance
US,
Inc.,
Term
Loan
(5)
0.000%
N/A
N/A
9/20/26
D
54,299
758
Diamond
Sports
Group,
LLC,
Term
Loan,
Second
Lien
(5)
8.167%
SOFR90A
3.250%
8/24/26
N/R
49,710
323
Lions
Gate
Capital
Holdings
LLC,
Term
Loan
B
7.275%
1-Month
LIBOR
2.250%
3/24/25
Ba2
319,066
639
Springer
Nature
Deutschland
GmbH,
Term
Loan
B18
8.159%
3-Month
LIBOR
3.000%
8/14/26
BB+
639,725
167
Univision
Communications
Inc.,
Term
Loan
C5
7.775%
1-Month
LIBOR
2.750%
3/15/24
B+
167,483
630
Virgin
Media
Bristol
LLC,
Term
Loan
Q
8.198%
1-Month
LIBOR
3.250%
1/31/29
BB+
624,664
Total
Entertainment
2,996,301
5
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Financial
Services
-
1.7%
(1.1%
of
Total
Investments)
$
817
Avaya,
Inc.,
Term
Loan
B2
(5)
8.840%
1-Month
LIBOR
4.000%
12/15/27
D
$
206,294
1,002
Avolon
TLB
Borrower
1
(US)
LLC,
Term
Loan
B3
6.703%
1-Month
LIBOR
1.750%
1/15/25
Baa2
1,000,004
1,888
Avolon
TLB
Borrower
1
(US)
LLC,
Term
Loan
B4
6.453%
1-Month
LIBOR
1.500%
2/12/27
Baa2
1,860,394
489
Trans
Union,
LLC,
Term
Loan
B6
7.275%
1-Month
LIBOR
2.250%
12/01/28
BBB-
489,045
Total
Financial
Services
3,555,737
Food
Products
-
1.1%
(0.6%
of
Total
Investments)
745
8th
Avenue
Food
&
Provisions,
Inc.,
Term
Loan,
First
Lien
,
(DD1)
8.775%
1-Month
LIBOR
3.750%
10/01/25
CCC+
660,907
411
CHG
PPC
Parent
LLC,
Term
Loan
8.063%
1-Month
LIBOR
3.000%
12/08/28
B1
408,282
170
Froneri
International
Ltd.,
Term
Loan
7.409%
3-Month
LIBOR
2.250%
1/31/27
B+
168,419
137
H
Food
Holdings
LLC,
Term
Loan
B
8.712%
1-Month
LIBOR
3.688%
5/31/25
B2
108,985
403
Sycamore
Buyer
LLC,
Term
Loan
B
7.347%
SOFR30A
2.250%
7/22/29
BB+
391,138
434
UTZ
Quality
Foods,
LLC,
Term
Loan
B
8.097%
SOFR30A
3.000%
1/20/28
B1
433,271
Total
Food
Products
2,171,002
Ground
Transportation
-
2.2%
(1.4%
of
Total
Investments)
228
Genesee
&
Wyoming
Inc.
(New),
Term
Loan
6.998%
SOFR90A
2.000%
12/30/26
BB+
227,281
921
Hertz
Corporation,
(The),
Term
Loan
B
,
(DD1)
8.275%
1-Month
LIBOR
3.250%
6/30/28
BB+
919,818
176
Hertz
Corporation,
(The),
Term
Loan
C
,
(DD1)
8.275%
1-Month
LIBOR
3.250%
6/30/28
BB+
176,083
2,195
Uber
Technologies,
Inc.,
Term
Loan
B
7.870%
TSFR3M
2.750%
3/03/30
Ba2
2,190,265
1,083
XPO
Logistics,
Inc.,
Term
Loan
B
6.621%
1-Month
LIBOR
1.750%
2/24/25
BBB-
1,082,626
Total
Ground
Transportation
4,596,073
Health
Care
Equipment
&
Supplies
-
6.7%
(4.0%
of
Total
Investments)
3,913
Bausch
&
Lomb,
Inc.,
Term
Loan
8.457%
SOFR90A
3.250%
5/05/27
BB-
3,814,130
1,377
Carestream
Health,
Inc.,
Term
Loan
12.498%
SOFR90A
7.500%
9/30/27
B-
995,760
1,180
CNT
Holdings
I
Corp,
Term
Loan
8.459%
SOFR90A
3.500%
11/08/27
B
1,169,819
204
Embecta
Corp,
Term
Loan
B
7.791%
SOFR180A
3.000%
1/27/29
Ba3
201,882
396
ICU
Medical,
Inc.,
Term
Loan
B
7.548%
SOFR90A
2.500%
12/14/28
BBB-
392,905
6,013
Medline
Borrower,
LP,
Term
Loan
B
8.275%
SOFR30A
3.250%
10/21/28
BB-
5,844,806
934
Viant
Medical
Holdings,
Inc.,
Term
Loan,
First
Lien
8.775%
1-Month
LIBOR
3.750%
7/02/25
B3
879,910
446
Vyaire
Medical,
Inc.,
Term
Loan
B
9.943%
3-Month
LIBOR
4.750%
4/16/25
Caa1
322,773
Total
Health
Care
Equipment
&
Supplies
13,621,985
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
6
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Health
Care
Providers
&
Services
-
9.1%
(5.5%
of
Total
Investments)
$
1,231
AHP
Health
Partners,
Inc.,
Term
Loan
B
8.525%
1-Month
LIBOR
3.500%
8/23/28
B1
$
1,230,480
710
DaVita,
Inc.
,
Term
Loan
B
,
(DD1)
6.847%
1-Month
LIBOR
1.750%
8/12/26
BBB-
704,428
137
Element
Materials
Technology
Group
US
Holdings
Inc.,
Term
Loan
9.248%
SOFR90A
4.250%
4/12/29
B1
135,093
63
Element
Materials
Technology
Group
US
Holdings
Inc.,
Term
Loan
9.248%
SOFR90A
4.250%
4/12/29
B1
62,350
320
Gainwell
Acquisition
Corp.,
Term
Loan
B
8.998%
SOFR90A
4.000%
10/01/27
BB-
308,752
300
Global
Medical
Response,
Inc.,
Term
Loan
,
(DD1)
9.203%
2-Month
LIBOR
4.250%
3/14/25
B3
186,267
2,063
Global
Medical
Response,
Inc.,
Term
Loan
B
9.236%
3-Month
LIBOR
4.250%
10/02/25
B3
1,287,656
1,898
ICON
Luxembourg
S.A.R.L.,
Term
Loan
7.410%
SOFR90A
2.250%
7/01/28
BB+
1,899,416
396
Medical
Solutions
Holdings,
Inc.,
Term
Loan,
First
Lien
8.240%
TSFR3M
3.250%
11/01/28
B1
382,537
629
National
Mentor
Holdings,
Inc.,
Term
Loan
8.790%
SOFR30A
+
SOFR90A
3.750%
3/02/28
B-
484,557
12
National
Mentor
Holdings,
Inc.,
Term
Loan
C
8.748%
SOFR90A
3.750%
3/02/28
B-
9,452
968
Onex
TSG
Intermediate
Corp.,
Term
Loan
B
10.057%
3-Month
LIBOR
4.750%
2/26/28
B
870,081
3,531
Parexel
International
Corporation,
Term
Loan,
First
Lien
8.275%
1-Month
LIBOR
3.250%
11/15/28
B1
3,475,941
1,051
Phoenix
Guarantor
Inc,
Term
Loan
B
8.275%
1-Month
LIBOR
3.250%
3/05/26
B1
1,036,523
980
Phoenix
Guarantor
Inc,
Term
Loan
B3
8.525%
1-Month
LIBOR
3.500%
3/05/26
B1
967,750
408
RegionalCare
Hospital
Partners
Holdings,
Inc.,
Term
Loan
B
9.023%
3-Month
LIBOR
3.750%
11/16/25
B1
385,091
1,253
Select
Medical
Corporation,
Term
Loan
B
7.530%
1-Month
LIBOR
2.500%
3/06/25
Ba2
1,251,805
2,418
Surgery
Center
Holdings,
Inc.,
Term
Loan
8.698%
1-Month
LIBOR
3.750%
8/31/26
B1
2,415,330
511
Team
Health
Holdings,
Inc.,
Term
Loan
B
10.232%
SOFR30A
5.250%
2/02/27
B-
335,945
766
Team
Health
Holdings,
Inc.,
Term
Loan,
First
Lien
7.775%
1-Month
LIBOR
2.750%
2/06/24
B-
649,115
470
US
Radiology
Specialists,
Inc.,
Term
Loan
10.332%
SOFR30A
5.250%
12/15/27
B-
435,795
Total
Health
Care
Providers
&
Services
18,514,364
Health
Care
Technology
-
0.0%
(0.0%
of
Total
Investments)
3
Athenahealth,
Inc.,
Term
Loan
8.464%
SOFR30A
3.500%
1/27/29
B+
2,563
22
Athenahealth,
Inc.,
Term
Loan
B
8.464%
SOFR30A
3.500%
1/27/29
B+
20,860
Total
Health
Care
Technology
23,423
7
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Hotels,
Restaurants
&
Leisure
-
19.5%
(11.8%
of
Total
Investments)
$
113
24
Hour
Fitness
Worldwide,
Inc.,
Exit
Term
Loan
18.953%
3-Month
LIBOR
14.000%
9/29/26
Caa3
$
59,465
252
24
Hour
Fitness
Worldwide,
Inc.,
Term
Loan
,
(cash
0.220%,
PIK
5.000%)
10.143%
3-Month
LIBOR
5.000%
12/29/25
CCC-
22,393
293
Alterra
Mountain
Company,
Term
Loan
8.525%
1-Month
LIBOR
3.500%
8/17/28
B+
293,149
51
Alterra
Mountain
Company,
Term
Loan
B1
,
(DD1)
7.775%
1-Month
LIBOR
2.750%
7/31/24
B+
51,475
399
Aramark
Services,
Inc.,
Term
Loan
B3
6.775%
1-Month
LIBOR
1.750%
3/11/25
BB+
398,022
5,276
B.C.
Unlimited
Liability
Company,
Term
Loan
B4
6.775%
1-Month
LIBOR
1.750%
11/19/26
BB+
5,240,570
2,020
Caesars
Entertainment
Corp,
Term
Loan
B
8.332%
SOFR30A
3.250%
1/25/30
Ba3
2,015,647
2,161
Carnival
Corporation,
Term
Loan
B
,
(DD1)
8.025%
1-Month
LIBOR
3.000%
6/30/25
Ba2
2,152,772
478
Carnival
Corporation,
Term
Loan
B
8.275%
1-Month
LIBOR
3.250%
10/18/28
BB-
470,300
1,170
Churchill
Downs
Incorporated,
Term
Loan
B1
7.082%
1-Month
LIBOR
2.000%
3/17/28
BBB-
1,169,548
3,175
ClubCorp
Holdings,
Inc.,
Term
Loan
B
7.775%
1-Month
LIBOR
2.750%
9/18/24
B2
3,008,872
2,116
Crown
Finance
US,
Inc.,
Term
Loan
,
(DD1)
14.924%
SOFR90A
+
TSFR3M
10.000%
9/09/23
N/R
2,158,126
574
Crown
Finance
US,
Inc.,
Term
Loan
(6)
6.642%
3-Month
LIBOR
3.000%
8/31/23
CCC+
105,714
1,559
Equinox
Holdings,
Inc.,
Term
Loan,
First
Lien
8.159%
3-Month
LIBOR
3.000%
3/08/24
Caa2
1,415,392
2,814
Fertitta
Entertainment,
LLC,
Term
Loan
B
8.982%
SOFR30A
4.000%
1/27/29
B
2,743,498
465
Four
Seasons
Hotels
Ltd,
Term
Loan
,
(WI/DD)
TBD
TBD
TBD
TBD
BB+
466,533
1,002
GVC
Holdings
(Gibraltar)
Limited,
Term
Loan
B
8.299%
SOFR90A
+
SOFR180A
+
TSFR3M
3.500%
10/31/29
Ba1
1,007,625
493
Hilton
Grand
Vacations
Borrower
LLC,
Term
Loan
B
8.025%
1-Month
LIBOR
3.000%
8/02/28
BB+
491,050
1,234
Hilton
Worldwide
Finance,
LLC,
Term
Loan
B2
6.821%
TSFR1M
1.750%
6/21/26
BBB-
1,233,931
3,360
IRB
Holding
Corp,
Term
Loan
B
8.082%
SOFR30A
3.000%
12/15/27
B+
3,311,321
628
Life
Time
Fitness
Inc
,
Term
Loan
B
9.775%
1-Month
LIBOR
4.750%
12/15/24
B+
628,415
109
Motion
Finco
Sarl,
Term
Loan
B2
,
(DD1)
8.409%
3-Month
LIBOR
3.250%
11/04/26
B
107,905
445
NASCAR
Holdings,
Inc,
Term
Loan
B
7.525%
1-Month
LIBOR
2.500%
10/18/26
BBB-
446,260
548
PCI
Gaming
Authority,
Term
Loan
7.525%
1-Month
LIBOR
2.500%
5/31/26
BBB-
547,462
435
Penn
National
Gaming,
Inc.,
Term
Loan
B
7.732%
SOFR30A
2.750%
4/20/29
BB
434,153
507
Scientific
Games
Holdings
LP,
Term
Loan
B
8.421%
SOFR90A
3.500%
2/04/29
BB-
500,790
1,701
Scientific
Games
International,
Inc.,
Term
Loan
7.981%
SOFR30A
3.000%
4/07/29
BBB-
1,699,316
985
SeaWorld
Parks
&
Entertainment,
Inc.,
Term
Loan
B
8.063%
1-Month
LIBOR
3.000%
8/25/28
BB
982,538
3,270
Stars
Group
Holdings
B.V.
(The),
Term
Loan
7.409%
3-Month
LIBOR
2.250%
7/10/25
BBB
3,271,844
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
8
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Hotels,
Restaurants
&
Leisure
(continued)
$
811
Stars
Group
Holdings
B.V.
(The),
Term
Loan
B
8.410%
SOFR90A
3.250%
7/04/28
BBB
$
813,143
1,430
Station
Casinos
LLC,
Term
Loan
B
7.280%
1-Month
LIBOR
2.250%
2/08/27
BB-
1,417,821
491
Twin
River
Worldwide
Holdings,
Inc.,
Term
Loan
B
8.198%
1-Month
LIBOR
3.250%
10/01/28
BB+
473,784
41
William
Morris
Endeavor
Entertainment,
LLC,
Term
Loan,
First
Lien
7.780%
1-Month
LIBOR
2.750%
5/16/25
B+
41,706
715
Wyndham
Hotels
&
Resorts,
Inc.,
Term
Loan
B
6.775%
1-Month
LIBOR
1.750%
5/30/25
BBB-
715,000
Total
Hotels,
Restaurants
&
Leisure
39,895,540
Household
Durables
-
0.8%
(0.5%
of
Total
Investments)
1,167
AI
Aqua
Merger
Sub,
Inc.,
Term
Loan
B,
First
Lien
8.616%
SOFR30A
+
SOFR90A
3.750%
7/30/28
B
1,138,310
560
Weber-Stephen
Products
LLC,
Term
Loan
B
8.332%
SOFR30A
+
1
Month
LIBOR
3.250%
10/30/27
CCC+
501,992
Total
Household
Durables
1,640,302
Household
Products
-
0.1%
(0.1%
of
Total
Investments)
319
Reynolds
Consumer
Products
LLC,
Term
Loan
6.832%
SOFR30A
1.750%
2/04/27
BBB-
316,549
Total
Household
Products
316,549
Independent
Power
and
Renewable
Electricity
Producers
-
0.3%
(0.2%
of
Total
Investments)
590
Vistra
Operations
Company
LLC,
Term
Loan
B3,
First
Lien
6.736%
1-Month
LIBOR
1.750%
12/31/25
BBB-
588,868
Total
Independent
Power
and
Renewable
Electricity
Producers
588,868
Insurance
-
5.5%
(3.3%
of
Total
Investments)
2,047
Acrisure,
LLC,
Term
Loan
B
8.525%
1-Month
LIBOR
3.500%
2/15/27
B
1,961,746
573
Alliant
Holdings
Intermediate,
LLC,
Term
Loan
B4
,
(DD1)
8.510%
1-Month
LIBOR
3.500%
11/06/27
B
569,142
1,383
Alliant
Holdings
Intermediate,
LLC,
Term
Loan
B5
8.376%
SOFR30A
3.500%
2/08/27
B
1,373,645
386
AmWINS
Group,
Inc.,
Term
Loan
B
7.721%
SOFR30A
2.750%
2/19/28
Ba3
385,252
156
Asurion
LLC,
Term
Loan
B4,
Second
Lien
10.275%
1-Month
LIBOR
5.250%
1/20/29
B
129,984
216
Asurion
LLC,
Term
Loan
B7
8.025%
1-Month
LIBOR
3.000%
11/03/24
Ba3
215,679
1,302
Asurion
LLC,
Term
Loan
B8
8.275%
1-Month
LIBOR
3.250%
12/23/26
Ba3
1,220,200
655
Asurion
LLC,
Term
Loan
B9
8.275%
1-Month
LIBOR
3.250%
7/31/27
Ba3
607,202
380
Broadstreet
Partners,
Inc.,
Term
Loan
B
,
(DD1)
8.025%
1-Month
LIBOR
3.000%
1/27/27
B
377,725
345
Broadstreet
Partners,
Inc.,
Term
Loan
B2
8.275%
1-Month
LIBOR
3.250%
1/27/27
B
339,005
529
Hub
International
Limited,
Term
Loan
B
8.445%
3-Month
LIBOR
3.250%
4/25/25
B
528,643
1,580
Hub
International
Limited,
Term
Loan
B
8.145%
1
+
3
Month
LIBOR
3.000%
4/25/25
B
1,578,707
190
Hub
International
Limited,
Term
Loan
B
8.765%
SOFR90A
4.000%
11/10/29
B
189,386
268
Ryan
Specialty
Group,
LLC,
Term
Loan
8.082%
SOFR30A
3.000%
9/01/27
BB-
268,069
1,577
USI,
Inc.,
Term
Loan
8.648%
SOFR90A
3.750%
11/16/29
B1
1,575,648
Total
Insurance
11,320,033
9
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Interactive
Media
&
Services
-
0.4%
(0.3%
of
Total
Investments)
$
2,170
Rackspace
Technology
Global,
Inc.,
Term
Loan
B
7.595%
3-Month
LIBOR
2.750%
2/09/28
B-
$
915,369
Total
Interactive
Media
&
Services
915,369
IT
Services
-
2.9%
(1.8%
of
Total
Investments)
709
Ahead
DB
Holdings,
LLC,
Term
Loan
B
8.909%
3-Month
LIBOR
3.750%
10/16/27
B+
689,650
154
iQor
US
Inc.,
Exit
Term
Loan
12.525%
1-Month
LIBOR
7.500%
11/19/24
B1
152,470
722
Peraton
Corp.,
Term
Loan
B
8.832%
1-Month
LIBOR
3.750%
2/01/28
BB-
708,278
675
Perforce
Software,
Inc.,
Term
Loan
B
8.775%
1-Month
LIBOR
3.750%
7/01/26
B2
631,433
1,866
Syniverse
Holdings,
Inc.,
Term
Loan
11.898%
SOFR90A
7.000%
5/10/29
B-
1,638,056
1,038
Tempo
Acquisition
LLC,
Term
Loan
B
7.982%
SOFR30A
3.000%
8/31/28
BB-
1,038,980
717
WEX
Inc.,
Term
Loan
7.275%
1-Month
LIBOR
2.250%
4/01/28
Ba2
716,435
375
World
Wide
Technology
Holding
Co.
LLC,
Term
Loan
8.153%
TSFR1M
3.250%
2/23/30
BB
372,656
Total
IT
Services
5,947,958
Leisure
Products
-
0.9%
(0.5%
of
Total
Investments)
275
Hayward
Industries,
Inc.,
Term
Loan
7.525%
1-Month
LIBOR
2.500%
5/28/28
BB
267,831
339
SRAM,
LLC
,
Term
Loan
B
7.775%
1-Month
LIBOR
2.750%
5/18/28
BB-
334,139
1,170
Topgolf
Callaway
Brands
Corp.,
Term
Loan
B
,
(DD1)
8.582%
SOFR30A
3.500%
3/09/30
B+
1,170,550
Total
Leisure
Products
1,772,520
Life
Sciences
Tools
&
Services
-
0.7%
(0.4%
of
Total
Investments)
191
Avantor
Funding,
Inc.,
Term
Loan
B5
7.332%
1-Month
LIBOR
2.250%
11/06/27
BB+
191,606
870
Curia
Global,
Inc.,
Term
Loan
8.848%
SOFR30A
+
SOFR90A
3.750%
8/30/26
B3
760,085
473
ICON
Luxembourg
S.A.R.L.,
Term
Loan
7.126%
SOFR90A
2.250%
7/01/28
BB+
473,104
Total
Life
Sciences
Tools
&
Services
1,424,795
Machinery
-
2.4%
(1.4%
of
Total
Investments)
1,155
Ali
Group
North
America
Corporation,
Term
Loan
B
7.097%
SOFR30A
2.000%
10/13/28
Baa3
1,152,112
725
Alliance
Laundry
Systems
LLC,
Term
Loan
B
8.559%
3-Month
LIBOR
3.500%
10/08/27
B
721,917
375
Chart
Industries,
Inc.,
Term
Loan
B
8.740%
TSFR1M
3.750%
12/08/29
Ba3
375,705
823
Gardner
Denver,
Inc.,
Term
Loan
B2
6.832%
SOFR30A
1.750%
2/28/27
BBB-
820,638
1,019
Gates
Global
LLC,
Term
Loan
B3
7.582%
SOFR30A
2.500%
3/31/27
Ba3
1,016,873
260
Grinding
Media
Inc.,
Term
Loan
B
9.075%
SOFR90A
+
1
Month
LIBOR
4.000%
10/12/28
B
246,908
491
Madison
IAQ
LLC,
Term
Loan
8.302%
6-Month
LIBOR
3.250%
6/21/28
B2
473,806
Total
Machinery
4,807,959
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
10
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Media
-
10.8%
(6.5%
of
Total
Investments)
$
993
ABG
Intermediate
Holdings
2
LLC,
Term
Loan
B1
8.582%
SOFR30A
3.500%
12/21/28
B1
$
980,218
160
ABG
Intermediate
Holdings
2
LLC,
Term
Loan,
Second
Lien
11.082%
SOFR30A
6.000%
12/20/29
CCC+
148,800
229
Altice
Financing
SA,
Term
Loan
9.986%
TSFR3M
5.000%
10/31/27
B
225,327
246
Cable
One,
Inc.,
Term
Loan
B4
7.025%
1-Month
LIBOR
2.000%
5/03/28
BB+
240,252
1,448
Cengage
Learning,
Inc.,
Term
Loan
B
9.880%
3-Month
LIBOR
4.750%
7/14/26
B
1,416,175
653
Charter
Communications
Operating,
LLC,
Term
Loan
B2
6.721%
SOFR30A
1.750%
2/01/27
BBB-
645,216
194
Checkout
Holding
Corp.,
First
Out
Term
Loan
14.525%
1-Month
LIBOR
7.500%
2/15/24
N/R
117,924
390
Checkout
Holding
Corp.,
Last
Out
Term
Loan
,
(cash
2.000,
PIK
9.500%)
8.762%
1-Month
LIBOR
6.250%
8/15/23
N/R
24,189
3,782
Clear
Channel
Outdoor
Holdings,
Inc.,
Term
Loan
B
8.807%
3-Month
LIBOR
3.500%
8/21/26
B1
3,569,547
501
CSC
Holdings,
LLC,
Term
Loan
7.198%
1-Month
LIBOR
2.250%
1/15/26
B1
473,953
291
CSC
Holdings,
LLC,
Term
Loan
B1
7.198%
1-Month
LIBOR
2.250%
7/17/25
B1
278,815
307
CSC
Holdings,
LLC,
Term
Loan
B5
7.448%
1-Month
LIBOR
2.500%
4/15/27
B1
272,505
2,137
CSC
Holdings,
LLC,
Term
Loan
B6
9.390%
TSFR1M
4.500%
1/18/28
B1
1,970,818
214
Cumulus
Media
New
Holdings
Inc.,
Term
Loan
B
8.775%
1-Month
LIBOR
3.750%
3/31/26
B
190,919
2,504
DirecTV
Financing,
LLC,
Term
Loan
10.025%
1-Month
LIBOR
5.000%
8/02/27
BBB-
2,410,268
350
Dotdash
Meredith
Inc,
Term
Loan
B
8.903%
SOFR30A
4.000%
12/01/28
B+
322,298
480
E.W.
Scripps
Company
(The),
Term
Loan
B2
7.659%
SOFR30A
2.563%
5/01/26
BB
466,962
1,322
Formula
One
Holdings
Limited.,
Term
Loan
B
8.232%
SOFR30A
3.250%
1/15/30
BB+
1,325,801
2,248
iHeartCommunications,
Inc.,
Term
Loan
8.025%
1-Month
LIBOR
3.000%
5/01/26
BB-
1,948,108
9
LCPR
Loan
Financing
LLC,
Term
Loan
B
8.698%
1-Month
LIBOR
3.750%
10/15/28
BB+
8,759
1,259
McGraw-Hill
Global
Education
Holdings,
LLC,
Term
Loan
9.797%
3
+
6
Month
LIBOR
4.750%
7/30/28
BB+
1,216,488
84
Mission
Broadcasting,
Inc.,
Term
Loan
B
7.348%
1-Month
LIBOR
2.500%
6/03/28
BBB-
83,434
182
Outfront
Media
Capital
LLC,
Term
Loan
B
6.775%
1-Month
LIBOR
1.750%
11/18/26
Ba1
180,427
250
Radiate
Holdco,
LLC,
Term
Loan
B
,
(WI/DD)
TBD
TBD
TBD
TBD
B3
207,657
422
Red
Ventures
LLC,
Term
Loan
B
7.982%
SOFR30A
3.000%
2/23/30
BB-
417,409
150
Virgin
Media
Bristol
LLC,
Term
Loan
Y
8.113%
SOFR180A
3.250%
3/06/31
BB-
147,787
528
WideOpenWest
Finance
LLC,
Term
Loan
B
7.898%
SOFR90A
3.000%
12/20/28
BB
523,029
2,274
Ziggo
Financing
Partnership,
Term
Loan
I
,
(DD1)
7.448%
1-Month
LIBOR
2.500%
4/30/28
BB
2,236,089
Total
Media
22,049,174
11
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Oil,
Gas
&
Consumable
Fuels
-
4.1%
(2.5%
of
Total
Investments)
$
635
BCP
Renaissance
Parent
LLC,
Term
Loan
B3
8.398%
SOFR90A
3.500%
10/31/26
B+
$
631,574
600
Buckeye
Partners,
L.P.,
Term
Loan
B
7.090%
1-Month
LIBOR
2.250%
11/01/26
BBB-
599,515
217
EG
America
LLC,
Term
Loan
9.025%
1-Month
LIBOR
4.000%
2/05/25
B-
210,727
1,355
Freeport
LNG
Investments,
LLLP,
Term
Loan
A
8.250%
3-Month
LIBOR
3.000%
11/16/26
N/R
1,313,466
1,402
Gulf
Finance,
LLC,
Term
Loan
11.770%
SOFR30A
+
TSFR1M
6.750%
8/25/26
B
1,361,600
205
M6
ETX
Holdings
II
Midco
LLC,
Term
Loan
B
9.546%
SOFR30A
4.500%
8/11/29
BB
203,834
645
Oryx
Midstream
Services
Permian
Basin
LLC,
Term
Loan
8.193%
SOFR30A
3.250%
10/05/28
BB
639,066
1,334
QuarterNorth
Energy
Holding
Inc.,
Exit
Term
Loan,
Second
Lien
13.025%
1-Month
LIBOR
8.000%
8/27/26
B
1,331,216
657
TransMontaigne
Operating
Company
L.P.,
Term
Loan
B
8.517%
1-Month
LIBOR
3.500%
11/05/28
BB-
651,506
1,056
Traverse
Midstream
Partners
LLC,
Term
Loan
8.865%
SOFR90A
+
TSFR3M
4.000%
9/27/24
B+
1,046,648
350
Whitewater
Whistler
Holdings,
LLC,
Term
Loan
B
8.148%
SOFR90A
3.250%
1/25/30
BB+
350,087
Total
Oil,
Gas
&
Consumable
Fuels
8,339,239
Paper
&
Forest
Products
-
0.1%
(0.0%
of
Total
Investments)
141
Asplundh
Tree
Expert,
LLC,
Term
Loan
B
6.775%
1-Month
LIBOR
1.750%
9/04/27
BBB-
140,867
Total
Paper
&
Forest
Products
140,867
Passenger
Airlines
-
5.2%
(3.1%
of
Total
Investments)
1,117
AAdvantage
Loyalty
IP
Ltd.,
Term
Loan
10.000%
3-Month
LIBOR
4.750%
4/20/28
Ba2
1,126,381
423
Air
Canada,
Term
Loan
B
8.369%
3-Month
LIBOR
3.500%
8/11/28
Ba2
422,673
1,965
American
Airlines,
Inc.,
Term
Loan
B
,
(DD1)
8.154%
SOFR180A
2.750%
2/06/28
Ba3
1,914,784
744
American
Airlines,
Inc.,
Term
Loan,
First
Lien
8.260%
SOFR90A
+
6
Month
LIBOR
2.625%
1/29/27
Ba3
725,594
2,157
Kestrel
Bidco
Inc.,
Term
Loan
B
8.064%
TSFR1M
3.000%
12/11/26
B+
2,046,639
492
Mileage
Plus
Holdings
LLC,
Term
Loan
B
10.213%
3-Month
LIBOR
5.250%
6/20/27
Baa3
512,894
2,286
SkyMiles
IP
Ltd.,
Term
Loan
B
8.798%
SOFR90A
3.750%
10/20/27
Baa1
2,371,885
1,470
United
Airlines,
Inc.,
Term
Loan
B
8.770%
1-Month
LIBOR
3.750%
4/21/28
Ba1
1,467,700
Total
Passenger
Airlines
10,588,550
Personal
Care
Products
-
0.6%
(0.3%
of
Total
Investments)
284
Conair
Holdings,
LLC,
Term
Loan
B
8.909%
3-Month
LIBOR
3.750%
5/17/28
B-
265,957
69
Coty
Inc.,
Term
Loan
B
7.197%
1-Month
LIBOR
2.250%
4/05/25
BB
68,881
563
Kronos
Acquisition
Holdings
Inc.,
Term
Loan
B
,
(DD1)
8.703%
3-Month
LIBOR
3.750%
12/22/26
B2
550,417
289
Kronos
Acquisition
Holdings
Inc.,
Term
Loan,
First
Lien
11.023%
SOFR90A
6.000%
12/22/26
B2
285,652
Total
Personal
Care
Products
1,170,907
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
12
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Pharmaceuticals
-
4.1%
(2.4%
of
Total
Investments)
$
449
Catalent
Pharma
Solutions
Inc.,
Term
Loan
B3
7.063%
1-Month
LIBOR
2.000%
2/22/28
BBB-
$
446,419
443
Elanco
Animal
Health
Incorporated,
Term
Loan
B
6.653%
TSFR1M
1.750%
8/01/27
BB+
431,586
3,221
Jazz
Financing
Lux
S.a.r.l.,
Term
Loan
8.525%
1-Month
LIBOR
3.500%
5/05/28
BB+
3,220,458
751
Mallinckrodt
International
Finance
S.A.,
Term
Loan
,
(WI/DD)
TBD
TBD
TBD
TBD
B3
538,422
2,497
Mallinckrodt
International
Finance
S.A.,
Term
Loan
,
(DD1)
10.198%
1-Month
LIBOR
5.250%
9/30/27
B3
1,789,121
12
Mallinckrodt
International
Finance
S.A.,
Term
Loan
B
,
(DD1)(5)
10.198%
1-Month
LIBOR
5.250%
9/24/24
B3
8,328
1,476
Organon
&
Co,
Term
Loan
7.986%
3-Month
LIBOR
3.000%
6/02/28
BB
1,475,804
388
Perrigo
Investments,
LLC,
Term
Loan
B
7.332%
SOFR30A
2.350%
4/05/29
BB+
386,775
Total
Pharmaceuticals
8,296,913
Professional
Services
-
2.9%
(1.8%
of
Total
Investments)
281
CHG
Healthcare
Services
Inc.,
Term
Loan
8.275%
1-Month
LIBOR
3.250%
9/30/28
B1
279,427
903
Creative
Artists
Agency,
LLC
,
Term
Loan
B
,
(DD1)
8.482%
SOFR30A
3.500%
11/16/28
B+
902,251
1,269
Dun
&
Bradstreet
Corporation
(The),
Term
Loan
8.268%
1-Month
LIBOR
3.250%
2/08/26
BB+
1,268,553
718
EAB
Global,
Inc.,
Term
Loan
8.723%
1
+
3
Month
LIBOR
3.500%
8/16/28
B2
703,779
326
Physician
Partners
LLC,
Term
Loan
9.048%
SOFR90A
4.000%
2/01/29
B
309,449
1,023
Travelport
Finance
(Luxembourg)
S.a.r.l.,
Term
Loan
,
(cash
3.500%,
PIK
6.500%)
6.525%
1-Month
LIBOR
1.500%
2/28/25
B-
1,037,373
1,478
Verscend
Holding
Corp.,
Term
Loan
B
9.025%
1-Month
LIBOR
4.000%
8/27/25
BB-
1,478,824
Total
Professional
Services
5,979,656
Real
Estate
Management
&
Development
-
0.5%
(0.3%
of
Total
Investments)
556
Cushman
&
Wakefield
U.S.
Borrower,
LLC,
Term
Loan
8.332%
SOFR30A
3.250%
1/31/30
BB
539,268
441
Cushman
&
Wakefield
U.S.
Borrower,
LLC,
Term
Loan
B
7.775%
1-Month
LIBOR
2.750%
8/21/25
BB
433,635
Total
Real
Estate
Management
&
Development
972,903
Semiconductors
&
Semiconductor
Equipment
-
0.2%
(0.1%
of
Total
Investments)
562
Bright
Bidco
B.V.,
Term
Loan
6.068%
SOFR90A
1.000%
10/31/27
B-
357,720
Total
Semiconductors
&
Semiconductor
Equipment
357,720
Software
-
17.5%
(10.5%
of
Total
Investments)
263
Apttus
Corporation,
Term
Loan
9.523%
3-Month
LIBOR
4.250%
5/06/28
BB
257,139
1,223
Avaya,
Inc.,
Term
Loan
12.890%
TSFR1M
8.000%
8/15/23
N/R
1,266,059
319
Avaya,
Inc.,
Term
Loan
12.528%
TSFR3M
7.500%
8/01/28
N/R
318,839
165
Avaya,
Inc.,
Term
Loan
14.827%
SOFR30A
10.000%
12/15/27
D
40,662
2,563
Banff
Merger
Sub
Inc,
Term
Loan
8.775%
1-Month
LIBOR
3.750%
10/02/25
B2
2,535,772
13
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Software
(continued)
$
376
Camelot
U.S.
Acquisition
LLC,
Term
Loan
B
8.025%
1-Month
LIBOR
3.000%
10/31/26
B+
$
375,914
318
Camelot
U.S.
Acquisition
LLC,
Term
Loan
B
8.025%
1-Month
LIBOR
3.000%
10/31/26
B+
318,367
247
CCC
Intelligent
Solutions
Inc.,
Term
Loan
B
7.275%
1-Month
LIBOR
2.250%
9/21/28
B+
246,165
1,112
CDK
Global,
Inc.,
Term
Loan
B
9.148%
SOFR90A
4.250%
6/09/29
B+
1,112,507
1,139
Ceridian
HCM
Holding
Inc.,
Term
Loan
B
7.525%
1-Month
LIBOR
2.500%
4/30/25
Ba3
1,138,308
1,493
DTI
Holdco,
Inc.,
Term
Loan
9.795%
SOFR90A
4.750%
4/21/29
B2
1,386,159
2,900
Epicor
Software
Corporation,
Term
Loan
,
(DD1)
8.275%
1-Month
LIBOR
3.250%
7/31/27
B2
2,867,945
2,581
Finastra
USA,
Inc.,
Term
Loan,
First
Lien
8.655%
2-Month
LIBOR
3.500%
6/13/24
B
2,466,382
2,349
Greeneden
U.S.
Holdings
II,
LLC,
Term
Loan
B4
9.025%
1-Month
LIBOR
4.000%
12/01/27
B2
2,330,998
232
Greenway
Health,
LLC,
Term
Loan,
First
Lien
8.960%
3-Month
LIBOR
3.750%
2/16/24
Caa1
174,449
2,178
Informatica
LLC,
Term
Loan
B
7.813%
1-Month
LIBOR
2.750%
10/14/28
BB-
2,175,822
427
iQor
US
Inc.,
Second
Out
Term
Loan
12.525%
1-Month
LIBOR
7.500%
11/19/25
CCC+
320,866
880
McAfee,
LLC,
Term
Loan
B
8.653%
SOFR30A
3.750%
2/03/29
BB+
831,680
2,223
NortonLifeLock
Inc.,
Term
Loan
B
7.082%
SOFR30A
2.000%
1/28/29
BBB-
2,201,909
3,117
Open
Text
Corporation,
Term
Loan
B
,
(DD1)
8.582%
SOFR30A
3.500%
8/25/29
BBB-
3,119,136
245
Project
Ruby
Ultimate
Parent
Corp.,
Term
Loan
8.347%
1-Month
LIBOR
3.250%
3/10/28
B
237,879
690
Proofpoint,
Inc.,
Term
Loan,
First
Lien
8.275%
1-Month
LIBOR
3.250%
8/31/28
BB-
676,316
405
Quartz
Acquireco
LLC,
Term
Loan
,
(WI/DD)
TBD
TBD
TBD
TBD
BB+
403,734
59
RealPage,
Inc,
Term
Loan,
First
Lien
8.025%
1-Month
LIBOR
3.000%
4/22/28
B+
57,716
1,251
Sophia,
L.P.,
Term
Loan
B
8.659%
3-Month
LIBOR
3.500%
10/07/27
B2
1,236,754
790
SS&C
European
Holdings
Sarl,
Term
Loan
B4
6.775%
1-Month
LIBOR
1.750%
4/16/25
BB+
789,554
890
SS&C
Technologies
Inc.,
Term
Loan
B3
6.775%
1-Month
LIBOR
1.750%
4/16/25
BB+
889,574
163
SS&C
Technologies
Inc.,
Term
Loan
B6
7.332%
SOFR30A
2.250%
3/22/29
BB+
162,855
246
SS&C
Technologies
Inc.,
Term
Loan
B7
7.332%
SOFR30A
2.250%
3/22/29
BB+
245,419
1,111
Ultimate
Software
Group
Inc
(The),
Term
Loan
8.271%
SOFR90A
3.250%
5/03/26
B1
1,083,294
483
Ultimate
Software
Group
Inc
(The),
Term
Loan
B
8.895%
SOFR90A
3.750%
5/03/26
B1
475,427
560
Vision
Solutions,
Inc.,
Term
Loan
9.255%
3-Month
LIBOR
4.000%
5/28/28
B2
499,697
2,196
Zelis
Healthcare
Corporation,
Term
Loan
8.525%
1-Month
LIBOR
3.500%
9/30/26
B
2,188,935
1,261
ZoomInfo
LLC,
Term
Loan
B
7.832%
SOFR30A
2.750%
2/01/30
Ba1
1,264,884
Total
Software
35,697,116
Specialty
Retail
-
4.8%
(2.9%
of
Total
Investments)
243
Academy,
Ltd.,
Term
Loan
8.598%
1-Month
LIBOR
3.750%
11/06/27
BB
242,955
1,141
Avis
Budget
Car
Rental,
LLC,
Term
Loan
B
6.847%
SOFR30A
1.750%
8/06/27
BB+
1,133,408
614
Avis
Budget
Car
Rental,
LLC,
Term
Loan
C
8.582%
SOFR30A
3.500%
3/15/29
BB+
615,439
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
14
NSL
Principal
Amount
(000)
Description
(1)
Coupon
(2)
Reference
Rate
(2)
Spread
(2)
Maturity
(3)
Ratings
(4)
Value
Specialty
Retail
(continued)
$
390
Belron
Finance
US
LLC,
Term
Loan
7.832%
SOFR90A
2.750%
4/06/29
Ba2
$
389,756
168
Driven
Holdings,
LLC,
Term
Loan
B
7.953%
1-Month
LIBOR
3.000%
12/17/28
B3
165,355
906
Jo-Ann
Stores,
Inc.,
Term
Loan
B1
10.018%
3-Month
LIBOR
4.750%
6/30/28
CCC+
500,034
867
LBM
Acquisition
LLC,
Term
Loan
B
8.775%
1-Month
LIBOR
3.750%
12/18/27
B+
807,650
321
Les
Schwab
Tire
Centers,
Term
Loan
B
8.064%
3-Month
LIBOR
3.250%
11/02/27
B
320,281
3,930
PetSmart,
Inc.,
Term
Loan
B
8.832%
SOFR30A
3.750%
2/12/28
BB
3,917,719
888
Restoration
Hardware,
Inc.,
Term
Loan
B
7.525%
1-Month
LIBOR
2.500%
10/15/28
BB-
825,370
212
SRS
Distribution
Inc.,
Term
Loan
8.471%
SOFR30A
3.500%
6/04/28
B-
203,113
302
Staples,
Inc.,
Term
Loan
9.814%
3-Month
LIBOR
5.000%
4/12/26
B
273,665
509
Wand
NewCo
3,
Inc.,
Term
Loan
7.775%
1-Month
LIBOR
2.750%
2/05/26
B2
499,716
Total
Specialty
Retail
9,894,461
Technology
Hardware,
Storage
&
Peripherals
-
0.2%
(0.1%
of
Total
Investments)
479
NCR
Corporation,
Term
Loan
7.780%
3-Month
LIBOR
2.500%
8/28/26
BB+
472,751
Total
Technology
Hardware,
Storage
&
Peripherals
472,751
Textiles,
Apparel
&
Luxury
Goods
-
0.4%
(0.3%
of
Total
Investments)
761
Birkenstock
GmbH
&
Co.
KG,
Term
Loan
B
8.064%
3-Month
LIBOR
3.250%
4/28/28
BB-
755,727
149
New
Trojan
Parent,
Inc.,
Term
Loan,
First
Lien
8.236%
1-Month
LIBOR
3.250%
1/06/28
B-
101,298
Total
Textiles,
Apparel
&
Luxury
Goods
857,025
Trading
Companies
&
Distributors
-
0.8%
(0.5%
of
Total
Investments)
983
Core
&
Main
LP,
Term
Loan
B
7.644%
SOFR30A
+
SOFR90A
2.500%
6/10/28
B+
977,956
578
Resideo
Funding
Inc.,
Term
Loan
7.180%
1
+
2
+
3
Month
LIBOR
2.250%
2/12/28
BBB-
577,570
Total
Trading
Companies
&
Distributors
1,555,526
Transportation
Infrastructure
-
0.7%
(0.4%
of
Total
Investments)
1,103
Brown
Group
Holding,
LLC,
Term
Loan
B
7.582%
SOFR30A
2.500%
4/22/28
B+
1,081,590
398
Brown
Group
Holding,
LLC,
Term
Loan
B2
8.764%
SOFR30A
3.750%
6/09/29
B+
396,617
Total
Transportation
Infrastructure
1,478,207
Wireless
Telecommunication
Services
-
1.1%
(0.7%
of
Total
Investments)
737
GOGO
Intermediate
Holdings
LLC,
Term
Loan
B
8.847%
SOFR30A
3.750%
4/30/28
B+
731,743
1,590
Intelsat
Jackson
Holdings
S.A.,
Term
Loan
B
9.082%
SOFR90A
4.250%
1/27/29
BB+
1,572,278
Total
Wireless
Telecommunication
Services
2,304,021
Total
Variable
Rate
Senior
Loan
Interests
(cost
$291,741,414)
277,218,832
15
Principal
Amount
(000)
Description
(1)
Coupon
Maturity
Ratings
(4)
Value
X
49,384,481
CORPORATE
BONDS
-
24.2%
(14.6%
of
Total
Investments)
X
49,384,481
Aerospace
&
Defense
-
0.3%
(0.2%
of
Total
Investments)
$
757
TransDigm
Inc
4.625%
1/15/29
B-
$
685,085
Total
Aerospace
&
Defense
685,085
Automobile
Components
-
0.5%
(0.3%
of
Total
Investments)
1,105
Adient
Global
Holdings
Ltd,
144A
4.875%
8/15/26
BB-
1,061,725
Total
Automobile
Components
1,061,725
Chemicals
-
1.1%
(0.7%
of
Total
Investments)
1,000
Celanese
US
Holdings
LLC
5.900%
7/05/24
BBB-
1,001,102
522
Rayonier
AM
Products
Inc,
144A
7.625%
1/15/26
B+
464,580
899
Trinseo
Materials
Operating
SCA
/
Trinseo
Materials
Finance
Inc,
144A
5.375%
9/01/25
B2
753,470
Total
Chemicals
2,219,152
Commercial
Services
&
Supplies
-
1.0%
(0.6%
of
Total
Investments)
780
Prime
Security
Services
Borrower
LLC
/
Prime
Finance
Inc,
144A
6.250%
1/15/28
B-
730,498
575
Prime
Security
Services
Borrower
LLC
/
Prime
Finance
Inc,
144A
5.750%
4/15/26
BB-
570,666
750
Prime
Security
Services
Borrower
LLC
/
Prime
Finance
Inc,
144A
3.375%
8/31/27
BB-
670,234
Total
Commercial
Services
&
Supplies
1,971,398
Communications
Equipment
-
1.4%
(0.8%
of
Total
Investments)
4,785
Avaya
Inc,
144A
(5),(7)
6.125%
9/15/28
D
1,268,025
485
Commscope
Inc,
144A
7.125%
7/01/28
CCC+
347,987
505
Commscope
Inc,
144A
4.750%
9/01/29
B1
407,811
750
Commscope
Inc,
144A
8.250%
3/01/27
CCC+
579,838
400
CommScope
Technologies
LLC,
144A
5.000%
3/15/27
CCC+
276,344
Total
Communications
Equipment
2,880,005
Containers
&
Packaging
-
0.1%
(0.1%
of
Total
Investments)
300
Pactiv
Evergreen
Group
Issuer
Inc/Pactiv
Evergreen
Group
Issuer
LLC,
144A
4.375%
9/30/28
B+
264,183
Total
Containers
&
Packaging
264,183
Diversified
Telecommunication
Services
-
1.1%
(0.7%
of
Total
Investments)
1,540
Frontier
Communications
Holdings
LLC,
144A
5.875%
10/15/27
BB+
1,417,546
506
Frontier
Communications
Holdings
LLC,
144A
6.000%
1/15/30
BB-
387,046
340
Frontier
Communications
Holdings
LLC,
144A
5.000%
5/01/28
BB+
298,558
250
Frontier
Communications
Holdings
LLC
5.875%
11/01/29
CCC+
190,150
Total
Diversified
Telecommunication
Services
2,293,300
Electric
Utilities
-
1.2%
(0.7%
of
Total
Investments)
1,735
Bruce
Mansfield
Unit
1
2007
Pass
Through
Trust
(5)
6.850%
6/01/34
N/R
17
490
Pacific
Gas
and
Electric
Co
4.550%
7/01/30
BBB
455,366
1,191
PG&E
Corp
5.000%
7/01/28
BB+
1,120,693
800
Talen
Energy
Supply
LLC,
144A
(5)
7.250%
5/15/27
N/R
832,000
Total
Electric
Utilities
2,408,076
Energy
Equipment
&
Services
-
1.5%
(0.9%
of
Total
Investments)
1,000
Shelf
Drilling
Holdings
Ltd,
144A
8.875%
11/15/24
B1
1,000,000
500
Shelf
Drilling
Holdings
Ltd,
144A
8.250%
2/15/25
CCC+
455,000
500
Transocean
Inc,
144A
11.500%
1/30/27
CCC+
511,740
1,000
Weatherford
International
Ltd,
144A
8.625%
4/30/30
B
1,018,620
Total
Energy
Equipment
&
Services
2,985,360
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
16
NSL
Principal
Amount
(000)  
Description
(1)
Coupon
Maturity
Ratings
(4)
Value
Entertainment
-
0.9%
(0.6%
of
Total
Investments)
$
2,586
AMC
Entertainment
Holdings
Inc,
(cash
10.000%,
PIK
12.000%),
144A
,
(cash
10.000%,
PIK
12.000%)
10.000%
6/15/26
CCC-
$
1,746,261
1,285
Diamond
Sports
Group
LLC
/
Diamond
Sports
Finance
Co,
144A
(5)
5.375%
8/15/26
N/R
86,738
1,775
Diamond
Sports
Group
LLC
/
Diamond
Sports
Finance
Co,
144A
(5)
6.625%
8/15/27
N/R
53,250
Total
Entertainment
1,886,249
Health
Care
Equipment
&
Supplies
-
0.2%
(0.1%
of
Total
Investments)
505
Mozart
Debt
Merger
Sub
Inc,
144A
3.875%
4/01/29
BB-
441,851
Total
Health
Care
Equipment
&
Supplies
441,851
Health
Care
Providers
&
Services
-
1.1%
(0.7%
of
Total
Investments)
65
HCA
Inc
5.375%
2/01/25
BBB-
65,032
830
Select
Medical
Corp,
144A
6.250%
8/15/26
B-
812,930
1,100
Tenet
Healthcare
Corp
6.125%
10/01/28
B+
1,067,229
302
Tenet
Healthcare
Corp
4.875%
1/01/26
BB-
297,427
Total
Health
Care
Providers
&
Services
2,242,618
Hotels,
Restaurants
&
Leisure
-
1.7%
(1.0%
of
Total
Investments)
302
1011778
BC
ULC
/
New
Red
Finance
Inc,
144A
3.500%
2/15/29
BB+
271,469
1,562
BC
ULC
/
New
Red
Finance
Inc,
144A
4.000%
10/15/30
B+
1,363,597
398
Caesars
Entertainment
Inc,
144A
6.250%
7/01/25
Ba3
398,486
500
Carnival
Corp,
144A
10.500%
2/01/26
BB-
521,962
495
Carnival
Holdings
Bermuda
Ltd,
144A
10.375%
5/01/28
B+
532,167
302
Life
Time
Inc,
144A
5.750%
1/15/26
B+
294,913
Total
Hotels,
Restaurants
&
Leisure
3,382,594
Independent
Power
Producers
&
Energy
Traders
-
0.7%
(0.4%
of
Total
Investments)
984
Talen
Energy
Supply
LLC,
144A
(5)
7.625%
6/01/28
N/R
1,028,280
450
Ziggo
Bond
Co
BV,
144A
6.000%
1/15/27
B-
426,923
Total
Independent
Power
Producers
&
Energy
Traders
1,455,203
Insurance
-
0.2%
(0.1%
of
Total
Investments)
305
Alliant
Holdings
Intermediate
LLC
/
Alliant
Holdings
Co-
Issuer,
144A
6.750%
4/15/28
B2
304,614
155
Alliant
Holdings
Intermediate
LLC
/
Alliant
Holdings
Co-
Issuer,
144A
4.250%
10/15/27
B
141,910
Total
Insurance
446,524
Interactive
Media
&
Services
-
0.2%
(0.1%
of
Total
Investments)
1,107
Rackspace
Technology
Global
Inc,
144A
3.500%
2/15/28
B-
459,405
Total
Interactive
Media
&
Services
459,405
Internet
Software
&
Services
-
0.3%
(0.2%
of
Total
Investments)
2,638
Rackspace
Technology
Global
Inc,
144A
5.375%
12/01/28
CCC+
625,998
Total
Internet
Software
&
Services
625,998
Media
-
3.0%
(1.8%
of
Total
Investments)
2,200
Charter
Communications
Operating
LLC
/
Charter
Communications
Operating
Capital
3.500%
3/01/42
BBB-
1,485,618
2,123
CSC
Holdings
LLC,
144A
3.375%
2/15/31
B1
1,458,937
1,380
iHeartCommunications
Inc,
144A
5.250%
8/15/27
BB-
1,089,964
4
iHeartCommunications
Inc
6.375%
5/01/26
BB-
3,312
230
LCPR
Senior
Secured
Financing
DAC,
144A
5.125%
7/15/29
BB+
196,997
691
McGraw-Hill
Education
Inc,
144A
5.750%
8/01/28
BB+
613,758
1,508
VZ
Secured
Financing
BV,
144A
5.000%
1/15/32
BB
1,258,454
Total
Media
6,107,040
17
Principal
Amount
(000)  
Description
(1)
Coupon
Maturity
Ratings
(4)
Value
Metals
&
Mining
-
0.2%
(0.1%
of
Total
Investments)
$
485
First
Quantum
Minerals
Ltd,
144A
6.875%
10/15/27
B+
$
470,862
Total
Metals
&
Mining
470,862
Oil,
Gas
&
Consumable
Fuels
-
3.1%
(1.8%
of
Total
Investments)
500
Calumet
Specialty
Products
Partners
LP
/
Calumet
Finance
Corp,
144A
8.125%
1/15/27
B-
483,910
1,715
Citgo
Holding
Inc,
144A
9.250%
8/01/24
B+
1,727,400
595
Citgo
Petroleum
Corp,
144A
7.000%
6/15/25
BB
592,025
302
Hilcorp
Energy
I
LP
/
Hilcorp
Finance
Co,
144A
6.250%
11/01/28
BB+
289,241
302
MEG
Energy
Corp,
144A
5.875%
2/01/29
BB-
289,955
1,417
NGL
Energy
Operating
LLC
/
NGL
Energy
Finance
Corp,
144A
7.500%
2/01/26
B+
1,358,634
250
NGL
Energy
Partners
LP
/
NGL
Energy
Finance
Corp
6.125%
3/01/25
CCC
230,920
250
NGL
Energy
Partners
LP
/
NGL
Energy
Finance
Corp
7.500%
4/15/26
CCC
224,520
1,125
PBF
Holding
Co
LLC
/
PBF
Finance
Corp
6.000%
2/15/28
BB
1,034,831
Total
Oil,
Gas
&
Consumable
Fuels
6,231,436
Passenger
Airlines
-
1.0%
(0.6%
of
Total
Investments)
750
American
Airlines
Inc,
144A
11.750%
7/15/25
Ba3
825,044
505
Delta
Air
Lines
Inc
3.750%
10/28/29
Baa3
451,714
302
United
Airlines
Inc,
144A
4.375%
4/15/26
Ba1
288,416
398
United
Airlines
Inc,
144A
4.625%
4/15/29
Ba1
360,201
Total
Passenger
Airlines
1,925,375
Pharmaceuticals
-
0.2%
(0.1%
of
Total
Investments)
430
ORGANON
&
CO/ORG,
144A
5.125%
4/30/31
BB-
383,149
Total
Pharmaceuticals
383,149
Specialized
Reits
-
0.5%
(0.3%
of
Total
Investments)
1,650
American
Tower
Corp
2.950%
1/15/51
BBB+
1,062,864
Total
Specialized
Reits
1,062,864
Specialty
Retail
-
1.6%
(1.0%
of
Total
Investments)
2,410
Hertz
Corp/The,
144A
4.625%
12/01/26
B+
2,170,591
1,010
Michaels
Cos
Inc/The,
144A
7.875%
5/01/29
CCC
677,064
290
PetSmart
Inc
/
PetSmart
Finance
Corp,
144A
4.750%
2/15/28
BB
274,093
125
PetSmart
Inc
/
PetSmart
Finance
Corp,
144A
7.750%
2/15/29
B-
123,266
Total
Specialty
Retail
3,245,014
Wireless
Telecommunication
Services
-
1.1%
(0.7%
of
Total
Investments)
1,305
Vmed
O2
UK
Financing
I
PLC,
144A
4.250%
1/31/31
BB+
1,081,734
1,371
Vmed
O2
UK
Financing
I
PLC,
144A
4.750%
7/15/31
BB+
1,168,281
Total
Wireless
Telecommunication
Services
2,250,015
Total
Corporate
Bonds
(cost
$55,773,434)
49,384,481
Shares
Description
(1)
Value
X
9,587,211
COMMON
STOCKS
-
4.7%
(2.8%
of
Total
Investments)
X
9,587,211
Banks
-
0.0%
(0.0%
of
Total
Investments)
15,167
iQor
US
Inc
(8)
$
5,688
Total
Banks
5,688
Broadline
Retail
-
0.0%
(0.0%
of
Total
Investments)
148
Belk
Inc
(7),(8)
1,184
Total
Broadline
Retail
1,184
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
18
NSL
Shares
Description
(1)
Value
Chemicals
-
0.0%
(0.0%
of
Total
Investments)
20
LyondellBasell
Industries
NV,
Class
A
$
1,892
Total
Chemicals
1,892
Communications
Equipment
-
0.1%
(0.0%
of
Total
Investments)
9,071
Windstream
Services
PE
LLC
(8)
92,978
Total
Communications
Equipment
92,978
Construction
&
Engineering
-
0.0%
(0.0%
of
Total
Investments)
1,797
TNT
Crane
&
Rigging
Inc
(8)
359
1,013
TNT
Crane
&
Rigging
Inc
(8)
6,754
Total
Construction
&
Engineering
7,113
Diversified
Consumer
Services
-
0.1%
(0.0%
of
Total
Investments)
12,578
Cengage
Learning
Holdings
II
Inc
(8)
135,214
Total
Diversified
Consumer
Services
135,214
Diversified
Telecommunication
Services
-
0.0%
(0.0%
of
Total
Investments)
8,135
Windstream
Services
PE
LLC
(8)
83,384
Total
Diversified
Telecommunication
Services
83,384
Energy
Equipment
&
Services
-
2.4%
(1.5%
of
Total
Investments)
33,080
Quarternorth
Energy
Holding
Inc
(8)
4,576,056
40,007
Transocean
Ltd
(8)
236,041
5,623
Vantage
Drilling
International
(8)
92,077
Total
Energy
Equipment
&
Services
4,904,174
Health
Care
Equipment
&
Supplies
-
0.1%
(0.0%
of
Total
Investments)
28,622
Onex
Carestream
Finance
LP
(8)
100,177
Total
Health
Care
Equipment
&
Supplies
100,177
Health
Care
Providers
&
Services
-
0.0%
(0.0%
of
Total
Investments)
35,750
Millennium
Health
LLC
(7),(8)
5,112
33,563
Millennium
Health
LLC
(7),(8)
1,443
Total
Health
Care
Providers
&
Services
6,555
Hotels,
Restaurants
&
Leisure
-
0.0%
(0.0%
of
Total
Investments)
55,426
24
Hour
Fitness
Worldwide
Inc
(8)
277
116,526
24
Hour
Fitness
Worldwide
Inc
(8)
699
Total
Hotels,
Restaurants
&
Leisure
976
Independent
Power
and
Renewable
Electricity
Producers
-
1.4%
(0.9%
of
Total
Investments)
37,457
Energy
Harbor
Corp
(8),(9)
2,906,026
Total
Independent
Power
and
Renewable
Electricity
Producers
2,906,026
Marine
Transportation
-
0.0%
(0.0%
of
Total
Investments)
430
American
Commercial
Barge
Line
Holding
Corp
(8)
12,040
Total
Marine
Transportation
12,040
Media
-
0.0%
(0.0%
of
Total
Investments)
5,388
Catalina
Marketing
Corp
(7),(8)
5
4
Cumulus
Media
Inc,
Class
A
(8)
14
775,233
Hibu
plc
(7),(8)
–
Total
Media
19
19
Shares
Description
(1)
Value
Oil,
Gas
&
Consumable
Fuels
-
0.6%
(0.4%
of
Total
Investments)
4,261
California
Resources
Corp
$
172,571
7,189
Chord
Energy
Corp
1,023,210
160
Quarternorth
Energy
Holding
Inc
(8)
22,133
Total
Oil,
Gas
&
Consumable
Fuels
1,217,914
Professional
Services
-
0.0%
(0.0%
of
Total
Investments)
48,296
Skillsoft
Corp
(8)
59,404
Total
Professional
Services
59,404
Semiconductors
&
Semiconductor
Equipment
-
0.0%
(0.0%
of
Total
Investments)
10,899
Bright
Bidco
BV
(7),(8)
28,535
7,979
Bright
Bidco
BV
(8)
23,938
Total
Semiconductors
&
Semiconductor
Equipment
52,473
Total
Common
Stocks
(cost
$14,178,899)
9,587,211
Shares
Description
(1)
Value
X
2,395,798
WARRANTS
-
1.2%
(0.7%
of
Total
Investments)
X
2,395,798
Energy
Equipment
&
Services
-
1.1%
(0.7%
of
Total
Investments)
14,599
Quarternorth
Energy
Holding
Inc
$
2,019,523
22,626
Quarternorth
Energy
Holding
Inc
158,382
11,748
Quarternorth
Energy
Holding
Inc
105,732
Total
Energy
Equipment
&
Services
2,283,637
Entertainment
-
0.0%
(0.0%
of
Total
Investments)
102,295
Cineworld
Warrant
–
Total
Entertainment
–
Marine
Transportation
-
0.1%
(0.0%
of
Total
Investments)
1,682
American
Commercial
Barge
Line
Holding
Corp
37,004
1,279
American
Commercial
Barge
Line
Holding
Corp
51,160
452
American
Commercial
Barge
Line
Holding
Corp
12,656
18,502
American
Commercial
Barge
Line
LLC
(7)
4,626
14,069
American
Commercial
Barge
Line
LLC
(7)
4,924
Total
Marine
Transportation
110,370
Oil,
Gas
&
Consumable
Fuels
-
0.0%
(0.0%
of
Total
Investments)
188
California
Resources
Corp
1,790
Total
Oil,
Gas
&
Consumable
Fuels
1,790
Wireless
Telecommunication
Services
-
0.0%
(0.0%
of
Total
Investments)
1
Intelsat
SA/Luxembourg
1
Total
Wireless
Telecommunication
Services
1
Total
Warrants
(cost
$419,825)
2,395,798
Shares
Description
(1)
Coupon
Ratings
(4)
Value
108,127
CONVERTIBLE
PREFERRED
SECURITIES
-
0.0%
(0.0%
of
Total
Investments)
X
108,127
Communications
Equipment
-
0.0%
(0.0%
of
Total
Investments)
8,660
Riverbed
Technology
Inc
0.000%
N/R
$
87
Total
Communications
Equipment
87
Nuveen
Senior
Income
Fund
(continued)
Portfolio
of
Investments
April
30,
2023
(Unaudited)
20
NSL
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
(1)
Coupon
Ratings
(4)
Value
Marine
Transportation
-
0.0%
(0.0%
of
Total
Investments)
1,821
American
Commercial
Barge
Line
Holding
Corp
0.000%
N/R
$
72,840
1,600
American
Commercial
Barge
Line
Holding
Corp
0.000%
N/R
35,200
Total
Marine
Transportation
108,040
Total
Convertible
Preferred
Securities
(cost
$247,327)
108,127
Total
Long-Term
Investments
(cost
$362,360,899)
338,694,449
Borrowings
-
(44.0)%
(10),(11)
(
89,800,000
)
TFP
Shares,
Net
-
(19.4)%(12)
(
39,650,208
)
Other
Assets
&
Liabilities,
Net
-  (2.5)%
(
5,149,289
)
Net
Assets
Applicable
to
Common
Shares
-
100%
$
204,094,952
Level
1
Level
2
Level
3
Total
Long-Term
Investments:
Variable
Rate
Senior
Loan
Interests
$
–
$
277,218,832
$
–
$
277,218,832
Corporate
Bonds
–
48,116,456
1,268,025
49,384,481
Common
Stocks
1,493,132
8,057,800
36,279
9,587,211
Warrants
1,790
2,384,458
9,550
2,395,798
Convertible
Preferred
Securities
–
108,127
–
108,127
Total
$
1,494,922
$
335,885,673
$
1,313,854
$
338,694,449
For
Fund
portfolio
compliance
purposes,
the
Fund’s
industry
classifications
refer
to
any
one
or
more
of
the
industry
sub-classifications
used
by
one
or
more
widely
recognized
market
indexes
or
ratings
group
indexes,
and/or
as
defined
by
Fund
management.
This
definition
may
not
apply
for
purposes
of
this
report,
which
may
combine
industry
sub-classifications
into
sectors
for
reporting
ease.
(1)
All
percentages
shown
in
the
Portfolio
of
Investments
are
based
on
net
assets
applicable
to
common
shares
unless
otherwise
noted.
(2)
Senior
loans
generally
pay
interest
at
rates
which
are
periodically
adjusted
by
reference
to
a
base
short-term,
floating
lending
rate
(Reference
Rate)
plus
an
assigned
fixed
rate
(Spread).
These
floating
lending
rates
are
generally
(i)
the
lending
rate
referenced
by
the
London
Inter-Bank
Offered
Rate
("LIBOR"),
or
(ii)
the
prime
rate
offered
by
one
or
more
major
United
States
banks.
Senior
loans
may
be
considered
restricted
in
that
the
Fund
ordinarily
is
contractually
obligated
to
receive
approval
from
the
agent
bank
and/or
borrower
prior
to
the
disposition
of
a
senior
loan.
The
rate
shown
is
the
coupon
as
of
the
end
of
the
reporting
period.
(3)
Senior
loans
generally
are
subject
to
mandatory
and/or
optional
prepayment.
Because
of
these
mandatory
prepayment
conditions
and
because
there
may
be
significant
economic
incentives
for
a
borrower
to
prepay,
prepayments
of
senior
loans
may
occur.
As
a
result,
the
actual
remaining
maturity
of
senior
loans
held
may
be
substantially
less
than
the
stated
maturities
shown.
(4)
For
financial
reporting
purposes,
the
ratings
disclosed
are
the
highest
of
Standard
&
Poor’s
Group
(“Standard
&
Poor’s”),
Moody’s
Investors
Service,
Inc.
(“Moody’s”)
or
Fitch,
Inc.
(“Fitch”)
rating.
This
treatment
of
split-rated
securities
may
differ
from
that
used
for
other
purposes,
such
as
for
Fund
investment
policies.
Ratings
below
BBB
by
Standard
&
Poor’s,
Baa
by
Moody’s
or
BBB
by
Fitch
are
considered
to
be
below
investment
grade.
Holdings
designated
N/R
are
not
rated
by
any
of
these
national
rating
agencies.
21
(5)
Defaulted
security.
A
security
whose
issuer
has
failed
to
fully
pay
principal
and/or
interest
when
due,
or
is
under
the
protection
of
bankruptcy.
(6)
Investment,
or
portion
of
investment,
represents
an
outstanding
unfunded
senior
loan
commitment.
(7)
For
fair
value
measurement
disclosure
purposes,
investment
classified
as
Level
3.
(8)
Non-income
producing;
issuer
has
not
declared
an
ex-dividend
date
within
the
past
twelve
months.
(9)
Energy
Harbor
Corp
(ENGH)
common
stock
received
as
part
of
the
bankruptcy
settlements
during
February
2020
for
Bruce
Mansfield
Unit
1
2007
Pass-Through
Trust.
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.  The
companies
anticipate
closing
the
transaction
in
the
second
half
of
2023.  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.
(10)
Borrowings
as
a
percentage
of
Total
Investments
is
26.5%.
(11)
The
Fund
segregates
100%
of
its
eligible
investments
(excluding
any
investments
separately
pledged
as
collateral
for
specific
investments
in
derivatives,
when
applicable)
in
the
Portfolio
of
Investments
as
collateral
for
borrowings.
(12)
TFP
Shares,
Net
as
a
percentage
of
Total
Investments
is
11.7%.
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.
DD1
Portion
of
investment
purchased
on
a
delayed
delivery
basis.
LIBOR
London
Inter-Bank
Offered
Rate
N/A
Not
Applicable.
PIK
Payment-in-kind
(“PIK”)
security.  Depending
on
the
terms
of
the
security,
income
may
be
received
in
the
form
of
cash,
securities,
or
a
combination
of
both.  The
PIK
rate
shown,
where
applicable,
represents
the
annualized
rate
of
the
last
PIK
payment
made
by
the
issuer
as
of
the
end
of
the
reporting
period.
REIT
Real
Estate
Investment
Trust
SOFR
180A
180
Day
Average
Secured
Overnight
Financing
Rate
SOFR
30A
30
Day
Average
Secured
Overnight
Financing
Rate
SOFR
90A
90
Day
Average
Secured
Overnight
Financing
Rate
TBD
Senior
loan
purchased
on
a
when-issued
or
delayed-delivery
basis.
Certain
details
associated
with
this
purchase
are
not
known
prior
to
the
settlement
date
of
the
transaction.
In
addition,
senior
loans
typically
trade
without
accrued
interest
and
therefore
a
coupon
rate
is
not
available
prior
to
settlement.
At
settlement,
if
still
unknown,
the
borrower
or
counterparty
will
provide
the
Fund
with
the
final
coupon
rate
and
maturity
date.
TSFR
1M
CME
Term
SOFR
1
Month
TSFR
3M
CME
Term
SOFR
3
Month
WI/DD
Purchased
on
a
when-issued
or
delayed
delivery
basis.
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