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Of the 4 tracked institutions holding MPLX, 2 have a 3-year clone track record — 2 of them beat the S&P. Average holder's clone alpha: +8.6pt. It's a gauge of who owns the name, not just how many.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Among the 4 tracked institutional investors we monitor, MPLX (MPLX LP) is held with a combined value of $228.84M across 4,009,808 shares. The largest holder is FMR LLC with a position worth $191.80M (0.01% of their portfolio). 1 fund increased its holdings. 3 funds reduced their position.
Total Institutional Value
$228.84M
Total Shares Held
4,009,808
Institutional Holders
4
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $191.80M | 0.01% | +101.4% |
| 2 | Appaloosa LP | $28.68M | 0.48% | -19.9% |
| 3 | BlackRock, Inc. | $8.06M | 0.00% | -0.3% |
| 4 | CITADEL ADVISORS LLC | $299.39K | 0.00% | -97.8% |
| Member | Type | Date |
|---|---|---|
| David A Perdue , Jr | Sell | Apr 15, 2020 |
| David A Perdue , Jr | Sell | Feb 19, 2020 |
| Patrick J Toomey | Sell | Jun 28, 2019 |
| David A Perdue , Jr | Buy |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of MPLX with a position worth $191.80M, representing 0.01% of their portfolio. In total, 4 institutional investors hold MPLX with a combined value of $228.84M.
Institutional investors hold $228.84M worth of MPLX stock across 4 positions. The largest institutional holder is FMR LLC with $191.80M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MPLX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their MPLX positions.
| Mar 19, 2019 |
| David A Perdue , Jr | Buy | Feb 4, 2019 |
| David A Perdue , Jr | Buy | Jan 31, 2019 |
| David A Perdue , Jr | Sell | Jul 6, 2016 |
| David A Perdue , Jr | Buy | Apr 22, 2016 |
Showing 8 of 9. STOCK Act disclosures lag up to 45 days.
Last Close
$58.63
2026-07-27
YTD
+13.1%
100% of 52-week range
