Marathon Petroleum has retired 58.3% of its shares since 2018, from 673,619,190 to 280,824,763.
The 2018 peak comes after shares issued to buy Andeavor in 2018. In 2017 the count was 476,059,729, so the retirement is measured from after that issuance.
| Fiscal year | Date | Shares outstanding | Filing | |
|---|---|---|---|---|
| 2012 | 2013-02-15 | 662,867,852 | 10-K | |
| 2013 | 2014-02-14 | 589,128,462 | 10-K | |
| 2014 | 2015-02-13 | 546,125,760 | 10-K | |
| 2015 | 2016-02-12 | 529,227,453 | 10-K | |
| 2016 | 2017-02-13 | 527,782,929 | 10-K | |
| 2017 | 2018-02-16 | 476,059,729 | 10-K | |
| 2018 | 2019-02-15 | 673,619,190 | 10-K | review share change, capital issuance |
| 2019 | 2020-02-17 | 649,503,967 | 10-K | |
| 2020 | 2021-02-12 | 651,274,842 | 10-K | |
| 2021 | 2022-02-15 | 565,212,958 | 10-K | |
| 2022 | 2023-02-16 | 445,546,907 | 10-K | |
| 2023 | 2024-02-23 | 361,358,732 | 10-K | |
| 2024 | 2025-02-21 | 312,575,833 | 10-K | |
| 2025 | 2026-02-20 | 294,740,164 | 10-K |
Source: all 10-K filings of Marathon Petroleum on EDGAR. Download this series as CSV. Licence CC BY 4.0, credit Buyback Radar.
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Yes. Marathon Petroleum has 6.6% fewer shares outstanding than twelve months ago, 280,824,763 as of July 30, 2026. Over five years the share count is down 54.4%.
Net of every new share it issued, Marathon Petroleum has 392.8 million fewer shares than at its 2018 peak. That is 58.3% of the company. Since fiscal 2019 alone it bought back about 404.0 million shares, while the count fell by 368.7 million. The difference went to employees and other new shares.
280,824,763 shares, as of July 30, 2026, from the cover page of its latest 10-Q. At the 2018 peak it had 673,619,190.
Each share is a bigger slice of the company. Someone who held Marathon Petroleum stock in 2018 owns 2.4 times as much of the business today without buying another share. Whether that was a good use of cash depends on the price paid.
Marathon Petroleum ranks No. 22 of 65 companies on Buyback Radar by share of the company retired since its peak. Close to it on the list: Arrow Electronics (58.6%), Western Union (58.4%), CF Industries (57.5%), Best Buy (57.3%).
Every answer is computed from Marathon Petroleum's own SEC filings and rebuilt every Monday. Latest count: 10-Q on EDGAR.
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