# MPLX LP

MPLX LP is a security (CUSIP 55336VBW9) tracked across SEC portfolio filings. 4 registered fund positions totaling $2.3M via N-PORT as of 2026-05-31.

## Summary

- Issuer: MPLX LP
- CUSIP: 55336VBW9
- Asset category: DBT
- 13F holders: 0
- N-PORT fund positions: 4
- N-PORT value: $2.3M
- N-PORT report: 2026-05-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [T. Rowe Price QM U.S. Bond Index Fund](https://search.stillhousedata.com/fund/S000002166) | T. ROWE PRICE QM U.S. BOND INDEX FUND, INC. | $1.5M | 6.16% |
| BlackRock Credit Allocation Income Trust | BlackRock Credit Allocation Income Trust | $808K | 7.89% |
| Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust | Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust | $47K | 1.16% |
| Invesco Bond Fund | Invesco Bond Fund | $11K | 0.60% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/55336VBW9.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.