# Thornburg Income Builder Opportunities Trust

Thornburg Income Builder Opportunities Trust (CIK 1820378) is an SEC-registered fund company and $726.5M in net assets as of 2026-03-31.

## Registrant

- CIK: 1820378
- File number: 811-23600
- LEI: 5493002O2SJJPEDP7413
- Address: 2300 NORTH RIDGETOP ROAD, Santa Fe, US-NM, 87506
- Phone: 505-984-0200
- Net assets: $726.5M
- Total assets: $728.5M
- Latest report: 2026-03-31

## Fund series (1)

| Series | Net assets |
| --- | --- |
| Thornburg Income Builder Opportunities Trust | $726.5M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| [Thornburg Capital Management Fund](https://search.stillhousedata.com/security/885216739) | $42.3M |
| Orange SA | $40.7M |
| [AT&T Inc](https://search.stillhousedata.com/security/00206R102) | $28.5M |
| [Taiwan Semiconductor Manufacturing Co Ltd](https://search.stillhousedata.com/security/874039100) | $22.3M |
| Enel SpA | $20.7M |
| Samsung Electronics Co Ltd | $20.4M |
| Roche Holding AG | $19.6M |
| Endesa SA | $17.3M |
| NN Group NV | $17.2M |
| TotalEnergies SE | $16.9M |
| Snam SpA | $15.5M |
| [CME Group Inc](https://search.stillhousedata.com/security/12572Q105) | $14.5M |
| [Enbridge Inc](https://search.stillhousedata.com/security/29250N105) | $13.6M |
| [Cisco Systems Inc](https://search.stillhousedata.com/security/17275R102) | $13.5M |
| BHP Group Ltd | $13.4M |

## More

- [CIK 1820378 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1820378&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/1820378.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.