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Video: What is a Stock Split?

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Allergan is a specialty pharmaceutical company engaged in the development, manufacturing, marketing, and distribution of brand name pharmaceutical products, medical aesthetics, biosimilar and over-the-counter pharmaceutical products. Co. has three operating segments: U.S. Specialized Therapeutics, which provides branded products within the U.S., including medical aesthetics, medical dermatology, eye care, neurosciences and urology therapeutic products; U.S. General Medicine, which includes Central Nervous System, gastrointestinal women's health, and anti-infectives products within the U.S.; and International, which provides a range of branded and aesthetics products outside of the U.S. According to our AGN split history records, Allergan PLC has had 2 splits.
AGN split history picture
Allergan PLC (AGN) has 2 splits in our AGN split history database. The first split for AGN took place on December 10, 1999. This was a 2 for 1 split, meaning for each share of AGN 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. AGN's second split took place on June 25, 2007. This was a 2 for 1 split, meaning for each share of AGN 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.

When a company such as Allergan PLC 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 AGN split history from start to finish, an original position size of 1000 shares would have turned into 4000 today. Below, we examine the compound annual growth rate — CAGR for short — of an investment into Allergan PLC shares, starting with a $10,000 purchase of AGN, presented on a split-history-adjusted basis factoring in the complete AGN split history. AGN split adjusted history picture

Growth of $10,000.00
With Dividends Reinvested

Start date: 05/22/2008
End date: 05/21/2018
Start price/share: $28.56
End price/share: $154.21
Starting shares: 350.14
Ending shares: 357.93
Dividends reinvested/share: $4.24
Total return: 451.96%
Average Annual Total Return: 18.62%
Starting investment: $10,000.00
Ending investment: $55,180.09
Years: 10.00
Growth of $10,000.00
Without Dividends Reinvested

Start date: 05/22/2008
End date: 05/21/2018
Start price/share: $28.56
End price/share: $154.21
Dividends collected/share: $4.24
Total return: 454.80%
Average Annual Total Return: 18.68%
Starting investment: $10,000.00
Ending investment: $55,459.91
Years: 10.00
Date Ratio
12/10/19992 for 1
06/25/20072 for 1
AGN is categorized under the Healthcare sector; below are some other companies in the same sector that also have a history of stock splits:

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