Marathon Petroleum (MPC) stock split history
Marathon Petroleum has split its stock once since 2015. The latest was a 2-for-1 split on 11 Jun 2015: each share held before became 2 shares. The close on 10 Jun 2015 was $101.79 and the first close on or after the effective date, 11 Jun 2015, was $52.03 (prices as traded). Below: every split, what it did to the share count, and the chart with splits marked.
All MPC stock splits
| Effective date | Split | Close before | First close after | Shares today per 1 held before |
|---|---|---|---|---|
| 11 Jun 2015 | 2-for-1 | $101.79 | $52.03 | 2 |
Split is new shares for old shares: in a 10-for-1 split one share becomes ten. Close before is the last close before the effective date and first close after is the first close on or after it, both as traded in MPC's own history (not adjusted), so the two differ by about the split ratio plus that day's market move. Shares today shows how many shares one share held just before that split has become after it and every later split. Dates and ratios: EODHD.
MPC price chart with splits marked
The chart shows split-adjusted prices, so the price does not jump on a split date; each split is marked on the date axis. Use the buttons to change the range.
How to read MPC's split history
A stock split changes the number of shares and the price per share by the same factor, so the value of a holding stays the same on the day. Marathon Petroleum's 2-for-1 split on 11 Jun 2015 is the latest in our data: each share held before became 2 shares.
A split does not change what a company earns or what it is worth. Per-share figures such as earnings and dividends per share are restated by the ratio, which is why old prices look different in an adjusted chart than in the newspaper of the day. The MPC stock page has the current score and fair value range, and the MPC price history lists daily prices with both as-traded and adjusted closes.
Recent splits in the same sector: Energy
| Company | Latest split | Date |
|---|---|---|
| TPL Texas Pacific Land | 3-for-1 | 23 Dec 2025 |
| EOG Eog Resources | 2-for-1 | 1 Apr 2014 |
| OKE Oneok | 2-for-1 | 4 Jun 2012 |
| EXE EXPAND ENERGY | 2-for-1 | 26 Mar 2008 |
| OXY Occidental Petroleum | 2-for-1 | 16 Aug 2006 |
| HAL Halliburton | 2-for-1 | 17 Jul 2006 |
| SLB Slb | 2-for-1 | 10 Apr 2006 |
| VLO Valero Energy | 2-for-1 | 16 Dec 2005 |
Frequently asked questions
When did Marathon Petroleum last split its stock?
The last MPC stock split in our data took effect on 11 Jun 2015. It was a 2-for-1 split: each share held before became 2 shares. The close on 10 Jun 2015 was $101.79 and the first close on or after the effective date, 11 Jun 2015, was $52.03 (prices as traded).
How many times has Marathon Petroleum split its stock?
Marathon Petroleum (MPC) has had 1 stock split since 11 Jun 2015 in our data, which goes back to 1990. One share held just before it is 2 shares today.
Has Marathon Petroleum announced a new stock split?
Our data lists no split for MPC after 11 Jun 2015 and no announced future one as of 22 Oct 2026. A company announces a split first, usually together with earnings or in a filing, and the split takes effect weeks later. The company's 8-K filings and press releases are the primary source.
What does a 2-for-1 split mean for shareholders?
In a 2-for-1 split the number of shares goes up and the price per share goes down by the same factor: each share held before became 2 shares. The total value of a holding is not changed by the split itself; it only changes with the market price afterwards.
Does a stock split change what a company is worth?
No. A split cuts the same company into more (or fewer) pieces, so market value, earnings and dividends per share are all restated by the ratio. Charts and per-share figures in our data are adjusted for splits so that past and present prices can be compared.
Where does this split data come from?
Split dates and ratios come from EODHD. The closing prices around each split are the as-traded closes in our database. Feed entries that are only price-adjustment factors for spin-offs or special distributions are not counted as splits.
Related
Educational information, not financial advice. Split data to 22 Oct 2026; a company can announce a split at any time.