# AMBAC ASSURANCE CORP Ambac Assurance Corp

AMBAC ASSURANCE CORP Ambac Assurance Corp is a security (CUSIP 023138AA8) tracked across SEC portfolio filings. 9 registered fund positions totaling $1.9M via N-PORT as of 2026-04-30.

## Summary

- Issuer: AMBAC ASSURANCE CORP
- Class: Ambac Assurance Corp
- CUSIP: 023138AA8
- Asset category: DBT
- 13F holders: 0
- N-PORT fund positions: 9
- N-PORT value: $1.9M
- N-PORT report: 2026-04-30

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Master Total Return Portfolio](https://search.stillhousedata.com/fund/S000004067) | Master Bond LLC | $669K | 0.35% |
| [BlackRock Total Return Fund](https://search.stillhousedata.com/fund/S000004071) | BlackRock Bond Fund, Inc. | $608K | 0.34% |
| PIMCO Flexible Credit Income Fund | PIMCO Flexible Credit Income Fund | $316K | 0.75% |
| PIMCO Dynamic Income Fund | PIMCO Dynamic Income Fund | $245K | 0.34% |
| BlackRock 2022 Global Income Opportunity Trust | BlackRock 2022 Global Income Opportunity Trust | $32K | 2.79% |
| [MFS Limited Maturity Fund](https://search.stillhousedata.com/fund/S000002495) | MFS Series Trust IX | $31K | 0.09% |
| PIMCO Global StocksPLUS & Income Fund | PIMCO Global StocksPLUS & Income Fund | $17K | 1.70% |
| [BlackRock Balanced Portfolio](https://search.stillhousedata.com/fund/S000003863) | BlackRock Series Fund, Inc. | $6K | 0.14% |
| [Franklin Strategic Mortgage Portfolio](https://search.stillhousedata.com/fund/S000006875) | Franklin Strategic Mortgage Portfolio | $327 | 0.13% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/023138AA8.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.