Biggest(20)Losers(9)PHARMA(47)Co(395)Stock(13053)
The pharmaceutical industry has long been a cornerstone of the American economy, with numerous companies contributing significantly to the healthcare sector. However, not all pharmaceutical stocks have seen success. In this article, we delve into the biggest pharma stock losers in the US, analyzing the factors that led to their downfall and the impact on the market.

1. Mylan N.V.
Mylan N.V. has been one of the most notable pharma stock losers in recent years. The company's stock has plummeted due to a combination of factors, including pricing pressures, increased competition, and regulatory challenges. Mylan's acquisition of the generic drug manufacturer, Perrigo, in 2016, was initially seen as a strategic move to expand its product portfolio. However, the deal has proven to be a costly mistake, with Mylan facing numerous legal issues and a decline in its market value.
2. Allergan PLC
Allergan PLC, once a leading player in the pharmaceutical industry, has also experienced significant stock losses. The company's stock has been affected by a variety of factors, including increased competition in its key markets and a regulatory environment that has become increasingly challenging. Allergan's acquisition of Actavis in 2015 was aimed at expanding its product portfolio and market reach. However, the deal has not yielded the expected results, and the company's stock has been on a downward spiral.
3. Gilead Sciences, Inc.
Gilead Sciences, Inc. has been another major pharma stock loser in the US. The company's stock has been affected by a combination of factors, including increased competition in its key markets and a regulatory environment that has become increasingly challenging. Gilead's HIV drug, Truvada, has been a major revenue driver for the company. However, the introduction of generic competition and the emergence of new, more effective HIV treatments have put pressure on the company's market position.
4. Amgen Inc.
Amgen Inc. has also been a significant pharma stock loser in the US. The company's stock has been affected by a variety of factors, including increased competition in its key markets and a regulatory environment that has become increasingly challenging. Amgen's biologic drugs, such as Enbrel and Neupogen, have been major contributors to the company's revenue. However, the introduction of generic competition and the emergence of new, more effective treatments have put pressure on the company's market position.
5. Merck & Co., Inc.
Merck & Co., Inc. has been another major pharma stock loser in the US. The company's stock has been affected by a variety of factors, including increased competition in its key markets and a regulatory environment that has become increasingly challenging. Merck's key drug, Keytruda, has been a major revenue driver for the company. However, the introduction of generic competition and the emergence of new, more effective treatments have put pressure on the company's market position.
In conclusion, the pharmaceutical industry has seen its fair share of stock losers in the US. The factors contributing to these losses include increased competition, regulatory challenges, and a changing healthcare landscape. As the industry continues to evolve, it remains to be seen which companies will rise to the top and which will fall by the wayside.
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