# MPLX LP COM UNIT REP LTD

MPLX LP COM UNIT REP LTD is a security (CUSIP 55336V100) tracked across SEC portfolio filings. 669 institutional managers reported $10.6B on Form 13F as of 2026-06-30; 55 registered fund positions totaling $1.4B via N-PORT as of 2026-05-31.

## Summary

- Issuer: MPLX LP
- Class: COM UNIT REP LTD
- CUSIP: 55336V100
- Asset category: EC
- 13F holders: 669
- 13F value: $10.6B
- 13F period: 2026-06-30
- N-PORT fund positions: 55
- N-PORT value: $1.4B
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 669 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [ALPS ADVISORS INC](https://search.stillhousedata.com/firm/134340) | Denver, CO | $1.6B | 28,601,592 |
| Blackstone Inc. | NEW YORK, NY | $876.1M | 15,350,683 |
| TORTOISE CAPITAL ADVISORS, L.L.C. | OVERLAND PARK, KS | $756.8M | 13,260,584 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $713.8M | 12,507,539 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | CENTRAL, K3 | $417.7M | 7,319,250 |
| [KAYNE ANDERSON CAPITAL ADVISORS LP](https://search.stillhousedata.com/firm/104536) | LOS ANGELES, CA | $389.6M | 6,826,567 |
| UBS Group AG | Zurich, V8 | $298.7M | 5,233,512 |
| [Energy Income Partners, LLC](https://search.stillhousedata.com/firm/140799) | Westport, CT | $294.3M | 5,157,478 |
| MORGAN STANLEY | NEW YORK, NY | $283.3M | 4,964,199 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $238.4M | 4,133,666 |
| BANK OF MONTREAL /CAN/ | TORONTO, A6 | $229.8M | 4,027,427 |
| FMR LLC | BOSTON, MA | $191.8M | 3,360,863 |
| [Brave Warrior Advisors, LLC](https://search.stillhousedata.com/firm/108894) | New York, NY | $185.7M | 3,253,524 |
| CIBC Bancorp USA Inc. | CHICAGO, IL | $148.3M | 2,642,104 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $146.9M | 2,573,276 |

## Top fund holders (N-PORT)

_Showing 15 of 55 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [KAYNE ANDERSON ENERGY INFRASTRUCTURE FUND, INC](https://search.stillhousedata.com/fund/S001293613) | Kayne Anderson Energy Infrastructure Fund, Inc. | $263.8M | 993.29% |
| [MainGate MLP Fund](https://search.stillhousedata.com/fund/S000031058) | MainGate Trust | $106.6M | 1271.98% |
| ClearBridge Energy Midstream Opportunity Fund Inc. | ClearBridge Energy Midstream Opportunity Fund Inc. | $106.4M | 949.09% |
| Tortoise Energy Infrastructure Corp | Tortoise Energy Infrastructure Corp | $92.9M | 937.16% |
| DNP Select Income Fund Inc | DNP Select Income Fund Inc | $73.1M | 186.31% |
| [Fidelity Capital Appreciation Fund](https://search.stillhousedata.com/fund/S000005450) | Fidelity Capital Trust | $69.5M | 91.25% |
| [NYLI Cushing MLP Premier Fund](https://search.stillhousedata.com/fund/S000045768) | NEW YORK LIFE INVESTMENTS FUNDS TRUST | $60.7M | 507.52% |
| [Invesco SteelPath MLP Alpha Plus Fund](https://search.stillhousedata.com/fund/S000064701) | AIM Investment Funds (Invesco Investment Funds) | $56.9M | 1734.30% |
| PIMCO Dynamic Income Strategy Fund | PIMCO Dynamic Income Strategy Fund | $47.3M | 441.17% |
| ClearBridge MLP & Midstream Fund Inc. | ClearBridge MLP & Midstream Fund Inc. | $44.4M | 1118.43% |
| COHEN & STEERS INFRASTRUCTURE FUND INC | COHEN & STEERS INFRASTRUCTURE FUND INC | $42.2M | 134.19% |
| Reaves Utility Income Fund | Reaves Utility Income Fund | $37.7M | 93.09% |
| Nuveen Energy MLP Total Return Fund | Nuveen Energy MLP Total Return Fund | $36.0M | 1559.76% |
| Tortoise Midstream Energy Fund, Inc. | Tortoise Midstream Energy Fund, Inc. | $32.6M | 962.97% |
| [Salient MLP & Energy Infrastructure Fund](https://search.stillhousedata.com/fund/S000037231) | SALIENT MF TRUST | $27.0M | 281.91% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/55336v100.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

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.