Thornburg Investment Income Builder Fund

S000011851THORNBURG INVESTMENT TRUSTCIK 0000816153

Share classes

7 classes of this one portfolio · 0 exchange-listed

Class ID	Symbol	Status	Security in the master	Type
C000032380	TIBAX	NOT_LISTED	not exchange-listed	—
C000032381	TIBCX	NOT_LISTED	not exchange-listed	—
C000058461	TIBGX	NOT_LISTED	not exchange-listed	—
C000032382	TIBIX	NOT_LISTED	not exchange-listed	—
C000047041	TIBMX	NOT_LISTED	not exchange-listed	—
C000177479	TIBOX	NOT_LISTED	not exchange-listed	—
C000042675	TIBRX	NOT_LISTED	not exchange-listed	—

The share-class bridge is a snapshot, not history. The SEC's fund share-class file says what each class trades as today, not what it traded as at a past report date. A fund that changed ticker or converted from a mutual fund resolves to its present-day symbol for every historical month shown.

Share classes

Report period

1 period filed. Holdings below describe the selected month only.

2026-03-31

Filing

NPORT-P · filed 2026-05-26

Report date: 2026-03-31
Net assets: $21,096,933,665.91
Total assets: $21,186,318,957.52
Total liabilities: $89,385,291.61
Assets invested: $0
Cash not reported in C or D: $3,140,681.95
Amendment: No
Accession: 0001410368-26-051176

By asset category

N-PORT Item C.4.a

ECEquity - common$19.65B93.3%

DBTDebt$836.09M4.0%

ABS-MBSAsset-backed: mortgage-ba…$267.88M1.3%

ABS-OAsset-backed: other$197.40M0.9%

EPEquity - preferred$56.18M0.3%

LONLoan$53.29M0.3%

STIVShort-term investment veh…$555.630.0%

DFEDerivative - foreign exch…-$5.95M-0.0%

By asset category

By issuer category

N-PORT Item C.4.b

CORPCorporate$19.72B93.7%

RFRegistered fund$1.21B5.7%

OTHEROther; the filer describe…$75.07M0.4%

USGAUS government agency$34.97M0.2%

By issuer category

By investment country

as filed

USUS$6.23B31.4%

FRFR$3.40B17.2%

GBGB$2.50B12.6%

NLNL$1.32B6.7%

DEDE$1.29B6.5%

TWTW$1.02B5.1%

ITIT$1.01B5.1%

CHCH$723.09M3.6%

KRKR$646.70M3.3%

CACA$618.52M3.1%

ESES$551.19M2.8%

IEIE$505.61M2.6%

By country

Classification look-through

Positions resolved to the master through ISIN, then rolled up through the taxonomy. 27.8% of reported value reaches a classification.

Not resolved to the master(310)$15.19B72.2%

Equity · Financials(6)$1.54B7.3%

Equity · Energy(4)$1.34B6.4%

Equity · Health Care(5)$1.04B4.9%

Equity · Information Technology(2)$830.91M3.9%

Equity · Communication Services(1)$782.81M3.7%

Equity · Consumer Discretionary(1)$166.25M0.8%

Equity · Materials(1)$72.03M0.3%

Equity · Real Estate(1)$65.23M0.3%

Equity · Industrials(1)$29.45M0.1%

Classification covers part of the master. 5,771 of 13,106 active securities are classified. Anything unclassified is shown as its own band rather than dropped, so a look-through total that falls short of 100% is telling you about coverage, not about the fund.

Percentages are of the reported value of positions above ($21.05B), not of the fund’s net assets ($21.10B). The two differ by cash, derivatives filed with no market value, and rounding.

Issuer↕	In master	CUSIP / ISIN	Asset	Balance↕	Value↕	Weight▼	Country
Orange SA	—	000000000 FR0000133308	EC CORP	72,111,380 NS	$1.48B EUR	7.008%	FR
Thornburg Capital Management Fund	—	885216739 US8852167399	EC RF	120,949,115.02 NS	$1.21B	5.733%	US
Taiwan Semiconductor Manufacturing Co Ltd	—	000000000 TW0002330008	EC CORP	17,649,261 NS	$1.02B TWD	4.838%	TW
Citigroup Inc	C	172967424 US1729674242	EC CORP	6,986,967 NS	$792.39M	3.756%	US
AT&T Inc	T	00206R102 US00206R1023	EC CORP	27,002,773 NS	$782.81M	3.711%	US
TotalEnergies SE	TTE	000000000 FR0000120271	EC CORP	8,285,200 NS	$760.37M EUR	3.604%	FR
BNP Paribas SA	—	000000000 FR0000131104	EC CORP	7,892,300 NS	$751.85M EUR	3.564%	FR
NN Group NV	—	000000000 NL0010773842	EC CORP	9,581,916 NS	$748.31M EUR	3.547%	NL
Samsung Electronics Co Ltd	—	000000000 KR7005930003	EC CORP	5,529,200 NS	$646.70M KRW	3.065%	KR
Broadcom Inc	AVGO	11135F101 US11135F1012	EC CORP	2,029,364 NS	$628.11M	2.977%	US
Zegona Communications plc	—	000000000 GB00BVGBY890	EC CORP	27,593,000 NS	$607.10M GBP	2.878%	GB
Enel SpA	—	000000000 IT0003128367	EC CORP	54,735,431 NS	$598.41M EUR	2.836%	IT
Deutsche Telekom AG	—	000000000 DE0005557508	EC CORP	15,821,300 NS	$590.50M EUR	2.799%	DE
Tesco PLC	—	000000000 GB00BLGZ9862	EC CORP	83,026,330 NS	$521.82M GBP	2.473%	GB
Vodafone Group PLC	—	000000000 GB00BH4HKS39	EC CORP	327,785,324 NS	$494.42M GBP	2.344%	GB
Endesa SA	—	000000000 ES0130670112	EC CORP	10,955,857 NS	$456.89M EUR	2.166%	ES
Merck & Co Inc	MRK	58933Y105 US58933Y1055	EC CORP	3,559,942 NS	$428.23M	2.030%	US
Bank of Ireland Group PLC	—	000000000 IE00BD1RP616	EC CORP	19,129,250 NS	$347.07M EUR	1.645%	IE
BAE Systems PLC	—	000000000 GB0002634946	EC CORP	11,749,400 NS	$344.47M GBP	1.633%	GB
Koninklijke KPN NV	—	000000000 NL0000009082	EC CORP	59,231,000 NS	$330.13M EUR	1.565%	NL
CME Group Inc	CME	12572Q105 US12572Q1058	EC CORP	1,063,223 NS	$314.02M	1.488%	US
AstraZeneca PLC	AZN	000000000 GB0009895292	EC CORP	1,545,700 NS	$302.25M GBP	1.433%	GB
AXA SA	—	000000000 FR0000120628	EC CORP	6,551,100 NS	$301.03M EUR	1.427%	FR
TC Energy Corp	TRP	87807B107 CA87807B1076	EC CORP	4,549,089 NS	$284.86M CAD	1.350%	CA
Deutsche Post AG	—	000000000 DE0005552004	EC CORP	5,217,600 NS	$275.00M EUR	1.304%	DE
Singapore Telecommunications Ltd	—	000000000 SG1T75931496	EC CORP	65,130,000 NS	$250.78M SGD	1.189%	SG
BHP Group Ltd	—	000000000 AU000000BHP4	EC CORP	6,902,000 NS	$249.73M AUD	1.184%	AU
Roche Holding AG	—	000000000 CH1499059983	EC CORP	618,500 NS	$246.84M CHF	1.170%	CH
Novartis AG	—	000000000 CH0012005267	EC CORP	1,390,208 NS	$213.39M CHF	1.011%	CH
Cisco Systems Inc	CSCO	17275R102 US17275R1023	EC CORP	2,613,737 NS	$202.80M	0.961%	US
Generali	—	000000000 IT0000062072	EC CORP	4,639,547 NS	$186.66M EUR	0.885%	IT
CK Hutchison Holdings Ltd	—	000000000 KYG217651051	EC CORP	23,928,000 NS	$183.67M HKD	0.871%	KY
Enbridge Inc	ENB	29250N105 CA29250N1050	EC CORP	3,309,521 NS	$179.41M CAD	0.850%	CA
Equitable Holdings Inc	EQH	29452E101 US29452E1010	EC CORP	4,814,078 NS	$178.65M	0.847%	US
E.ON SE	—	000000000 DE000ENAG999	EC CORP	8,053,300 NS	$176.38M EUR	0.836%	DE
Home Depot Inc/The	HD	437076102 US4370761029	EC CORP	505,482 NS	$166.25M	0.788%	US
Glencore PLC	—	000000000 JE00B4T3BW64	EC CORP	21,342,700 NS	$161.65M GBP	0.766%	JE
Medtronic PLC	MDT	000000000 IE00BTN1Y115	EC CORP	1,829,695 NS	$158.54M	0.751%	IE
Regions Financial Corp	RF	7591EP100 US7591EP1005	EC CORP	5,862,414 NS	$153.13M	0.726%	US
Nestle SA	—	000000000 CH0038863350	EC CORP	1,451,300 NS	$142.36M CHF	0.675%	CH
Daimler Truck Holding AG	—	000000000 DE000DTR0CK8	EC CORP	2,629,400 NS	$129.49M EUR	0.614%	DE
Shell PLC	—	000000000 GB00BP6MXD84	EC CORP	2,735,600 NS	$126.70M GBP	0.601%	GB
Swisscom AG	—	000000000 CH0008742519	EC CORP	143,600 NS	$120.50M CHF	0.571%	CH
Snam SpA	—	000000000 IT0003153415	EC CORP	15,827,000 NS	$119.90M EUR	0.568%	IT
Mercedes-Benz Group AG	—	000000000 DE0007100000	EC CORP	1,903,100 NS	$116.97M EUR	0.554%	DE
ASR Nederland NV	—	000000000 NL0011872643	EC CORP	1,670,500 NS	$115.01M EUR	0.545%	NL
South Bow Corp	SOBO	83671M105 CA83671M1059	EC CORP	3,421,560 NS	$113.83M CAD	0.540%	CA
Eni SpA	—	000000000 IT0003132476	EC CORP	3,846,400 NS	$109.37M EUR	0.518%	IT
AbbVie Inc	ABBV	00287Y109 US00287Y1091	EC CORP	476,780 NS	$103.69M	0.492%	US
Midea Group Co Ltd	—	000000000 CNE100001QQ5	EC CORP	9,034,630 NS	$100.64M CNY	0.477%	CN