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Video: What is a Stock Split?
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Merck & Co., Inc. is a global health care company. It offers health solutions through its prescription medicines, including biologic therapies, vaccines and animal health products. Its Pharmaceutical segment includes human health pharmaceuticals and vaccine products. Human health pharmaceutical products include therapeutic and preventive agents, sold by prescription, for the treatment of human disorders. Its Animal Health segment discovers, develops, manufactures and markets a range of veterinary pharmaceutical and vaccine products and health management solutions and services, for the prevention, treatment and control of disease in all livestock and companion animal species. According to our Merck and stock split history records, Merck and has had 6 splits. | |
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Merck and (MRK) has 6 splits in our Merck and stock split history database. The first split for MRK took place on June 01, 1972. This was a 2 for 1
split, meaning for each share of MRK owned pre-split, the shareholder now owned 2 shares. For example, a 1000 share position pre-split, became a 2000 share position following the split. MRK's second split took place on May 27, 1986. This was a 2 for 1
split, meaning for each share of MRK owned pre-split, the shareholder now owned 2 shares. For example, a 2000 share position pre-split, became a 4000 share position following the split. MRK's third split took place on May 26, 1988. This was a 3 for 1
split, meaning for each share of MRK owned pre-split, the shareholder now owned 3 shares. For example, a 4000 share position pre-split, became a 12000 share position following the split. MRK's 4th split took place on May 26, 1992. This was a 3 for 1
split, meaning for each share of MRK owned pre-split, the shareholder now owned 3 shares. For example, a 12000 share position pre-split, became a 36000 share position following the split. MRK's 5th split took place on February 17, 1999. This was a 2 for 1
split, meaning for each share of MRK owned pre-split, the shareholder now owned 2 shares. For example, a 36000 share position pre-split, became a 72000 share position following the split. MRK's 6th split took place on June 03, 2021. This was a 1048 for 1000 split, meaning for each 1000 shares of MRK owned pre-split, the shareholder now owned 1048 shares. For example, a 72000 share position pre-split, became a 75456 share position following the split.
When a company such as Merck and splits its shares, the market capitalization before and after the split takes place remains stable, meaning the shareholder now owns more shares but each are valued at a lower price per share. Often, however, a lower priced stock on a per-share basis can attract a wider range of buyers. If that increased demand causes the share price to appreciate, then the total market capitalization rises post-split. This does not always happen, however, often depending on the underlying fundamentals of the business.
Looking at the Merck and stock split history from start to finish, an original position size of 1000 shares would have turned into 75456 today. Below, we examine the compound annual growth rate — CAGR for short — of an investment into Merck and shares, starting with a $10,000 purchase of MRK, presented on a split-history-adjusted basis factoring in the complete Merck and stock split history.

Growth of $10,000.00
With Dividends Reinvested
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Start date: |
03/25/2015 |
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End date: |
03/21/2025 |
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Start price/share: |
$55.59 |
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End price/share: |
$93.11 |
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Starting shares: |
179.89 |
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Ending shares: |
244.14 |
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Dividends reinvested/share: |
$23.59 |
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Total return: |
127.32% |
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Average Annual Total Return: |
8.56% |
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Starting investment: |
$10,000.00 |
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Ending investment: |
$22,730.06 |
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Years: |
10.00 |
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Growth of $10,000.00
Without Dividends Reinvested
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Start date: |
03/25/2015 |
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End date: |
03/21/2025 |
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Start price/share: |
$55.59 |
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End price/share: |
$93.11 |
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Dividends collected/share: |
$23.59 |
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Total return: |
109.93% |
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Average Annual Total Return: |
7.70% |
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Starting investment: |
$10,000.00 |
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Ending investment: |
$20,992.72 |
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Years: |
10.00 |
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Date |
Ratio |
06/01/1972 | 2 for 1
| 05/27/1986 | 2 for 1
| 05/26/1988 | 3 for 1
| 05/26/1992 | 3 for 1
| 02/17/1999 | 2 for 1
| 06/03/2021 | 1048 for 1000 |
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