Marathon Petroleum Corp
Held by 14 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 56585A102 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
In plain English: 14 of the investors we track own this stock. In the latest quarter, 7 of them bought more of it and 6 sold some or all of theirs (1 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Managers holding
14
0 vs last quarter (like-for-like)
Total value held
$2.62B
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.2%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
-$959.47M
-32.6% vs last quarter
Net shares bought
-4.3M
Est. net flow -$1.11B
Quarter activity
7 bought · 6 sold
1 new · 1 sold out
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns MPC?
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Who owns MPC? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Boston Partners | Boston Partners Global Investors | 3.52M | $905.82M | 0.8% | Reduced | -2.1M | -37.8% | -$549.82M |
| 4 | Two Sigma | Two Sigma Investments | 1.24M | $316.84M | 0.2% | Reduced | -285.0K | -18.7% | -$72.88M |
| 8 | Bill Nygren | Harris Associates (Oakmark Funds) | 229.01K | $58.55M | 0.1% | Reduced | -2.6M | -91.8% | -$658.85M |
| 11 | Ken Fisher | Fisher Asset Management | 17.37K | $4.44M | 0.0% | Reduced | -1.0K | -5.4% | -$255.93K |
| 12 | Mario Gabelli | GAMCO Investors | 6.96K | $1.78M | 0.0% | Reduced | -16 | -0.2% | -$4.09K |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| John Ciampaglia & Eric Sprott | Sprott Inc | -922 | $225.13K |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| David J. Taylor Politician | Sep 22, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Schwab Joint Brokerage #1 (Home Grown) | Oct 1, 2026 | 9 days | PTR ↗ |
| David J. Taylor Politician | Sep 22, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Sardinia Ready Mix 401(k) - Dave | Oct 1, 2026 | 9 days | PTR ↗ |
| David J. Taylor Politician | Jul 24, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Schwab Joint Brokerage #1 (Home Grown) | Aug 6, 2026 | 13 days | PTR ↗ |
| David J. Taylor Politician | Jul 24, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Sardinia Ready Mix 401(k) - Dave | Aug 6, 2026 | 13 days | PTR ↗ |
| Dan Newhouse Politician | Jul 10, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Edward Jones IRA | Jul 17, 2026 | 7 days | PTR ↗ |
| David J. Taylor Politician | Mar 11, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Schwab Joint Brokerage #1 (Home Grown) | Mar 20, 2026 | 9 days | PTR ↗ |
| David J. Taylor Politician | Mar 11, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Sardinia Ready Mix 401(k) - Dave | Mar 20, 2026 | 9 days | PTR ↗ |
| David J. Taylor Politician | Feb 26, 2026 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Sardinia Ready Mix 401(k) - Dave | Mar 6, 2026 | 8 days | PTR ↗ |
| David J. Taylor Politician | Jul 18, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Schwab Joint Brokerage #1 (Home Grown) | Sep 2, 2025 | 46 days Late | PTR ↗ |
| David J. Taylor Politician | Jul 18, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Sardinia Ready Mix 401(k) - Dave | Sep 2, 2025 | 46 days Late | PTR ↗ |
| David J. Taylor Politician | Aug 14, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | David Taylor Trust > Sardinia Ready Mix 401(k) - Dave | Sep 2, 2025 | 19 days | PTR ↗ |
| Jefferson Shreve Politician | May 12, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Self | CRT - Standard Unit Trust | Jun 22, 2025 | 41 days | PTR ↗ |
| Robert P. Bresnahan, Jr. Politician | May 15, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | JP Morgan Brokerage Account | May 31, 2025 | 16 days | PTR ↗ |
| Dan Newhouse Politician | Apr 11, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Edward Jones IRA | May 16, 2025 | 35 days | PTR ↗ |
| Julie Johnson Politician | Apr 1, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Joint | Merrill Lynch Tax Efficient Core | May 14, 2025 | 43 days | PTR ↗ |
| Robert P. Bresnahan, Jr. Politician | Apr 8, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | JP Morgan Brokerage Account | May 8, 2025 | 30 days | PTR ↗ |
| Jefferson Shreve Politician | Mar 5, 2025 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Purchase | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Self | CRT - Standard Unit Trust | Apr 11, 2025 | 37 days | PTR ↗ |
| Dan Newhouse Politician | Apr 10, 2024 | MPC | Marathon Petroleum Corporation Common Stock (MPC) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Edward Jones IRA | Apr 25, 2024 | 15 days | PTR ↗ |