Public ownership evidence

MPLX LP (MPLX) Ownership Disclosures

Read MPLX insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Recent Form 4 activity

2026-08-192026-08-14Peiffer Garry L.A1,232.17Not reported
2026-08-192026-08-14Walker Ray N JRA81.94Not reported
2026-08-192026-08-14SURMA JOHN PA1,563.43Not reported
2026-08-192026-08-14STICE J MICHAELA982.72Not reported
2026-08-192026-08-14SEMPLE FRANK MA1,072.72Not reported
2026-08-192026-08-14HELMS CHRISTOPHER AA1,336.96Not reported
2026-08-192026-08-14Breves Christine SA218.82Not reported
2026-08-062026-04-30Walker Ray N JRA2,696.39Not reported
2026-08-062026-04-30SURMA JOHN PA3,028.94Not reported
2026-08-062026-04-30STICE J MICHAELA3,028.94Not reported
2026-08-062026-04-30SEMPLE FRANK MA3,028.94Not reported
2026-08-062026-04-30Peiffer Garry L.A2,696.39Not reported
2026-08-062026-04-30HELMS CHRISTOPHER AA2,696.39Not reported
2026-08-062026-04-30Breves Christine SA2,696.39Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

B. Riley Wealth Advisors, Inc.2025-03-312026-08-2921,555$1,153,610None
Advisors Asset Management, Inc.2021-12-312026-08-2892,207$2,728,405None
Advisors Asset Management, Inc.2022-12-312026-08-2884,333$2,769,496None
Advisors Asset Management, Inc.2020-06-302026-08-2853$916None
Advisors Asset Management, Inc.2020-06-302026-08-28111,808$1,932,042None
Advisors Asset Management, Inc.2022-06-302026-08-2888,350$2,575,000None
Advisors Asset Management, Inc.2021-09-302026-08-28102,894$2,929,000None
Corient Private Wealth LP2026-06-302026-08-28348,098$19,608,390None
VELA Investment Management, LLC2026-06-302026-08-2818,164$1,023,178None
VELA Investment Management, LLC2026-03-312026-08-2816,513$942,397None
VELA Investment Management, LLC2025-12-312026-08-2819,100$1,019,367Put
VELA Investment Management, LLC2025-12-312026-08-2835,346$1,886,416None
Wellington Grp LLC2026-06-302026-08-2715,589$878,128None
Advisors Asset Management, Inc.2024-03-312026-08-2760,485$2,513,757None
Advisors Asset Management, Inc.2025-03-312026-08-27111,882$5,987,925None
Advisors Asset Management, Inc.2022-09-302026-08-2782,246$2,468,000None
Advisors Asset Management, Inc.2020-12-312026-08-27109,452$2,370,000None
Advisors Asset Management, Inc.2022-03-312026-08-2787,582$2,905,971None
Advisors Asset Management, Inc.2023-06-302026-08-2778,226$2,654,990None
Advisors Asset Management, Inc.2023-09-302026-08-2766,993$2,382,941None
Advisors Asset Management, Inc.2023-03-312026-08-2776,526$2,636,321None
Advisors Asset Management, Inc.2021-03-312026-08-27106,751$2,736,028None
Advisors Asset Management, Inc.2021-06-302026-08-27107,151$3,173,000None
Advisors Asset Management, Inc.2020-09-302026-08-27111,060$1,748,084None
Advisors Asset Management, Inc.2025-09-302026-08-27149,367$7,460,882None
Advisors Asset Management, Inc.2023-12-312026-08-2768,191$2,503,974None
WILLIAM JOHN SEMPOLINSKI2026-03-312026-08-275,539$316,111None
WILLIAM JOHN SEMPOLINSKI2025-12-312026-08-274,839$258,257None
Advus Financial Partners, LLC2026-06-302026-08-266,191$348,739None
Advus Financial Partners, LLC2026-03-312026-08-266,000$342,420None
Advus Financial Partners, LLC2025-12-312026-08-266,000$320,220None
Advus Financial Partners, LLC2025-09-302026-08-266,000$299,700None
Advus Financial Partners, LLC2025-06-302026-08-266,000$309,060None
Advus Financial Partners, LLC2025-03-312026-08-266,000$321,120None
Advus Financial Partners, LLC2024-12-312026-08-266,000$287,160None
Advus Financial Partners, LLC2024-09-302026-08-266,000$266,760None
Advus Financial Partners, LLC2024-06-302026-08-265,481$233,436None
Advus Financial Partners, LLC2024-03-312026-08-265,481$227,790None
Advus Financial Partners, LLC2023-12-312026-08-265,481$201,262None
Advus Financial Partners, LLC2022-03-312026-08-266,376$211,556None
Advisors Asset Management, Inc.2019-12-312026-08-2653$1,349None
Advisors Asset Management, Inc.2019-12-312026-08-2695,738$2,437,489None
Advisors Asset Management, Inc.2025-06-302026-08-25128,590$6,623,671None
Advisors Asset Management, Inc.2024-09-302026-08-2260,517$2,690,586None
Advisors Asset Management, Inc.2024-06-302026-08-2262,676$2,669,371None
Advisors Asset Management, Inc.2024-12-312026-08-2287,484$4,186,984None
Advisors Asset Management, Inc.2025-12-312026-08-22157,932$8,428,831None
Advisors Asset Management, Inc.2020-03-312026-08-22115,090$1,337,346None
Rehmann Capital Advisory Group2026-06-302026-08-2115,173$854,695None
Archer Investment Corp2026-06-302026-08-20361$20,342None

90-day public filing window, up to 50 source positions.

B. Riley Wealth Advisors, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Corient Private Wealth LP ↗VELA Investment Management, LLC ↗VELA Investment Management, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.