BlackRock's passive 7.9% stake is consistent with index fund positioning. No change in control intent. Monitor for any future conversion to Schedule 13D, which would signal an activist shift, but this filing shows no such intent.
Price Chart
Executive Summary
BlackRock filed an amended Schedule 13G for Marathon Petroleum Corp, reporting beneficial ownership of 22,115,488 shares (7.9% of common stock) as of September 30, 2026. This is a routine passive stake update by a large index/asset manager; no change in investment intent or activist posture is indicated.
Key Financial Metrics
Key Facts
- BlackRock, Inc. filed an amendment to Schedule 13G for Marathon Petroleum Corp (MPC) on October 27, 2026.
- BlackRock reported beneficial ownership of 22,115,488 shares of MPC common stock, representing 7.9% of shares outstanding as of September 30, 2026.
- The filing is made under Rule 13d-1(b), confirming passive investment intent.
- BlackRock disclaims beneficial ownership of securities held by certain business units per SEC Release No. 34-39538.
- Exhibit 99 lists 19 BlackRock subsidiaries, one of which (marked with an asterisk) beneficially owns 5% or more of the class.
Financial Impact
BlackRock holds 22,115,488 shares (7.9% of MPC) as of September 30, 2026. Based on the market cap of $128.4B, the stake value is approximately $10.1B.
Risk Factors
- No material risks identified from this routine passive stake amendment.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 5 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| SC 13G/A Filing (Primary) | 0002012383-26-003815 |
| Document: Item_7.txt | 0002012383-26-003815 |
| Document: 0002012383-26-003815-index-headers.html | 0002012383-26-003815 |
| Document: 0002012383-26-003815-index.html | 0002012383-26-003815 |
| Document: 0002012383-26-003815.txt | 0002012383-26-003815 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 28, 2026 today | Press Release | $440.77 | awaiting T+60 | awaiting T+60 | $435.98 (−1.09%) |
Oct 27, 2026 1d ago | SC 13G/A | $434.22 | awaiting T+60 | awaiting T+60 | $435.98 (+0.41%) |
Oct 16, 2026 12d ago | Institutional Cluster | $473.69 | awaiting T+60 | awaiting T+60 | $435.98 (−7.96%) |
Sep 17, 2026 5w ago | Press Release | $424.89 | awaiting T+60 | awaiting T+60 | $435.98 (+2.61%) |
Sep 1, 2026 8w ago | Insider Cluster | $387.00 | awaiting T+60 | awaiting T+60 | $435.98 (+12.66%) |
Aug 19, 2026 10w ago | Insider Cluster | $358.23 | awaiting T+60 | awaiting T+60 | $435.98 (+21.70%) |
Aug 17, 2026 10w ago | Insider Cluster | $365.21 | awaiting T+60 | awaiting T+60 | $435.98 (+19.38%) |
Aug 4, 2026 12w ago | 8-K | $312.61 $435.98 | ▲ +39.46% | ▲ +39.68% | $435.98 (+39.46%) |
Jun 29, 2026 17w ago | 8-K | $259.22 $389.68 | ▲ +50.33% | ▲ +45.94% | $435.98 (+68.19%) |
May 6, 2026 25w ago | S-3ASR | $242.17 $316.47 | ▲ +30.68% | ▲ +28.57% | $435.98 (+80.03%) |
US Market Status
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