# MPLX LP

MPLX LP is a security (CUSIP 55336VBX7) tracked across SEC portfolio filings. 12 registered fund positions totaling $38.5M via N-PORT as of 2026-05-31.

## Summary

- Issuer: MPLX LP
- CUSIP: 55336VBX7
- Asset category: DBT
- 13F holders: 0
- N-PORT fund positions: 12
- N-PORT value: $38.5M
- N-PORT report: 2026-05-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD INTERMEDIATE-TERM BOND INDEX FUND](https://search.stillhousedata.com/fund/S000002561) | VANGUARD BOND INDEX FUNDS | $8.8M | 1.71% |
| [Pioneer Bond Fund](https://search.stillhousedata.com/fund/S000003927) | Pioneer Bond Fund /DE/ | $7.8M | 15.72% |
| [College Retirement Equities Fund - Responsible Balanced Account](https://search.stillhousedata.com/fund/S000005086) | College Retirement Equities Fund | $6.9M | 3.37% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $5.2M | 0.88% |
| [Federated Hermes Total Return Bond Fund](https://search.stillhousedata.com/fund/S000010897) | Federated Hermes Total Return Series, Inc. | $4.7M | 3.10% |
| [PGIM Core Bond Fund](https://search.stillhousedata.com/fund/S000004691) | Target Portfolio Trust | $3.4M | 14.00% |
| [Six Circles Global Bond Fund](https://search.stillhousedata.com/fund/S000068181) | SIX CIRCLES TRUST | $730K | 0.43% |
| [BlackRock Total Return Fund](https://search.stillhousedata.com/fund/S000004071) | BlackRock Bond Fund, Inc. | $365K | 0.21% |
| [Pioneer Balanced ESG Fund](https://search.stillhousedata.com/fund/S000010109) | Pioneer Series Trust IV | $242K | 5.78% |
| [Pioneer Bond VCT Portfolio](https://search.stillhousedata.com/fund/S000010172) | PIONEER VARIABLE CONTRACTS TRUST /MA/ | $222K | 17.26% |
| [State Farm Balanced Fund](https://search.stillhousedata.com/fund/S000071158) | Advisers Investment Trust | $101K | 0.39% |
| [VOYA BALANCED PORTFOLIO](https://search.stillhousedata.com/fund/S000008663) | Voya BALANCED PORTFOLIO INC | $15K | 0.48% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/55336VBX7.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.