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Video: What is a Stock Split?
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Amarin Corporation PLC is a pharmaceutical company. Co. is focused on the commercialization and development of therapeutics to improve cardiovascular (CV), health and reduce CV risk. Co. operates through the development and commercialization of VASCEPA. Its lead product, Vascepa (icosapent ethyl) capsule is used as an adjunct to diet to reduce triglyceride levels in adult patients with severe hypertriglyceridemia. This indication for Vascepa, known as the MARINE indication, is based primarily on the results from the MARINE study of Vascepa in this approved patient population. According to our AMRN split history records, Amarin has had 2 splits. | |
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Amarin (AMRN) has 2 splits in our AMRN split history database. The first split for AMRN took place on October 19, 1998. This was a 1 for 10
reverse split, meaning for each 10
shares of AMRN owned pre-split, the shareholder now owned 1 share. For example, a 1000 share position pre-split, became a 100 share position following the split. AMRN's second split took place on April 11, 2025. This was a 1 for 20 reverse split, meaning for each 20 shares of AMRN owned pre-split, the shareholder now owned 1 share. For example, a 100 share position pre-split, became a 5 share position following the split.
When a company such as Amarin conducts a reverse share split, it is usually because shares have fallen to a lower per-share pricepoint than the company would like. This can be important because, for example, certain types of mutual funds might have a limit governing which stocks they may buy, based upon per-share price. The $5 and $10 pricepoints tend to be important in this regard. Stock exchanges also tend to look at per-share price, setting a lower limit for listing eligibility. So when a company does a reverse split, it is looking mathematically at the market capitalization before and after the reverse split takes place, and concluding that if the market capitilization remains stable, the reduced share count should result in a higher price per share.
Looking at the AMRN split history from start to finish, an original position size of 1000 shares would have turned into 5 today. Below, we examine the compound annual growth rate — CAGR for short — of an investment into Amarin shares, starting with a $10,000 purchase of AMRN, presented on a split-history-adjusted basis factoring in the complete AMRN split history.

Growth of $10,000.00
Without Dividends Reinvested
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Start date: |
04/30/2015 |
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End date: |
04/28/2025 |
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Start price/share: |
$38.40 |
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End price/share: |
$10.32 |
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Dividends collected/share: |
$0.00 |
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Total return: |
-73.12% |
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Average Annual Total Return: |
-12.31% |
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Starting investment: |
$10,000.00 |
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Ending investment: |
$2,687.47 |
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Years: |
10.00 |
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Date |
Ratio |
10/19/1998 | 1 for 10
| 04/11/2025 | 1 for 20 |
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