MPC
Marathon Petro (MPC)
NYSE
$396.30+$0.37 (+0.09%)
Price as of Sep 11, 2026 7:59 PM EDT
  • $111.2B
    Market Cap
  • 123.29%
    1-Year Change
  • Oil & Gas Refining & Marketing
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
13.12%
38.3M
-52,760 (-0.14%)
Dec 31, 2025
BLACKROCK INC.
9.65%
28.2M
-1.8M (-6.49%)
Jun 30, 2024
BLACKROCK, INC.
8.91%
26.0M
+1.6M (+6.20%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
8.48%
24.8M
-613,848 (-2.48%)
Dec 31, 2024
VANGUARD CAPITAL MANAGEMENT LLC
6.53%
19.1M
-95,805 (-0.50%)
Jun 30, 2026
STATE STREET CORP
6.33%
18.5M
-553,115 (-2.99%)
Jun 30, 2026
BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A.
5.65%
16.5M
+253,905 (+1.54%)
Dec 31, 2016

Current Ownership Distribution

  • Institutions5.6B (59.43%)
  • Mutual Funds3.4B (36.73%)
  • Insiders360.4M (3.84%)
  • Other0 (0.00%)

Insider Transactions

  • 3.84% (360.4M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 4
    Number of InsiderSelling (last 12 months)
  • $32.2M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Brzezinski Erin M
VP and Controller
Sell
Aug 27, 2026
$206,790.30
570
$362.79
1,576
Benson Molly R
Chief Legal Ofc & Corp Sec
Exempt
Aug 17, 2026
$0.00
7,196
$0.00
10,000
Benson Molly R
Chief Legal Ofc & Corp Sec
Exempt
Aug 17, 2026
$0.00
5,000
$0.00
5,000
Benson Molly R
Chief Legal Ofc & Corp Sec
Exempt
Aug 17, 2026
$0.00
5,000
$0.00
0
Benson Molly R
Chief Legal Ofc & Corp Sec
Exempt
Aug 17, 2026
$343,465.08
7,196
$47.73
37,530
Benson Molly R
Chief Legal Ofc & Corp Sec
Sell
Aug 17, 2026
$2.6M
7,196
$358.57
30,334
Benson Molly R
Chief Legal Ofc & Corp Sec
Exempt
Aug 17, 2026
$238,650.00
5,000
$47.73
35,334
Benson Molly R
Chief Legal Ofc & Corp Sec
Sell
Aug 17, 2026
$1.8M
5,000
$358.57
30,334
Benson Molly R
Chief Legal Ofc & Corp Sec
Exempt
Aug 17, 2026
$238,650.00
5,000
$47.73
35,334
Benson Molly R
Chief Legal Ofc & Corp Sec
Sell
Aug 17, 2026
$1.8M
5,000
$358.57
30,334
Henschen Michael A II
Ex VP, Refining
Sell
Aug 12, 2026
$2.1M
6,011
$341.56
10,889
Mannen Maryann T.
Chairman, President & CEO
In Kind
Aug 03, 2026
$283,096.24
908
$311.78
110,939
Hessling Ricky D.
Chief Commercial Officer
Sell
Mar 13, 2026
$371,020.68
1,626
$228.18
7,525
Lyon Shawn M
SVP Log & Storage, MPLX GP LLC
Gift
Mar 11, 2026
$0.00
1,186
$0.00
15,119
Brzezinski Erin M
VP and Controller
In Kind
Mar 02, 2026
$10,108.70
49
$206.30
2,247
Floerke Gregory Scott
Ex VP & COO, MPLX GP LLC
In Kind
Mar 02, 2026
$57,351.40
278
$206.30
31,560
Brzezinski Erin M
VP and Controller
In Kind
Mar 02, 2026
$8,664.60
42
$206.30
2,205
Benson Molly R
Chief Legal Ofc & Corp Sec
In Kind
Mar 02, 2026
$35,277.30
171
$206.30
30,966
Brzezinski Erin M
VP and Controller
In Kind
Mar 02, 2026
$12,171.70
59
$206.30
2,146
Floerke Gregory Scott
Ex VP & COO, MPLX GP LLC
In Kind
Mar 02, 2026
$51,781.30
251
$206.30
31,309
Lyon Shawn M
SVP Log & Storage, MPLX GP LLC
In Kind
Mar 02, 2026
$53,019.10
257
$206.30
16,821
Henschen Michael A II
Ex VP, Refining
In Kind
Mar 02, 2026
$34,452.10
167
$206.30
18,586
Lyon Shawn M
SVP Log & Storage, MPLX GP LLC
In Kind
Mar 02, 2026
$48,893.10
237
$206.30
16,584
Floerke Gregory Scott
Ex VP & COO, MPLX GP LLC
In Kind
Mar 02, 2026
$57,351.40
278
$206.30
31,031
Lyon Shawn M
SVP Log & Storage, MPLX GP LLC
In Kind
Mar 02, 2026
$57,557.70
279
$206.30
16,305
Benson Molly R
Chief Legal Ofc & Corp Sec
In Kind
Mar 02, 2026
$58,589.20
284
$206.30
30,682
Henschen Michael A II
Ex VP, Refining
In Kind
Mar 02, 2026
$25,374.90
123
$206.30
18,463
Benson Molly R
Chief Legal Ofc & Corp Sec
In Kind
Mar 02, 2026
$71,792.40
348
$206.30
30,334
Henschen Michael A II
Ex VP, Refining
In Kind
Mar 02, 2026
$39,403.30
191
$206.30
18,272
Khoury Maria A
Exec VP & Chief Fin Ofc
Award
Mar 01, 2026
$0.00
2,443
$0.00
4,017