It fell to Bayer AG and CSL Limited to wrap up the big pharma earnings season. They faced a less desirable shared challenge – lingering impacts from past deals.
Stock Watch: Bad Deals Backfire On Bayer And CSL
Acquisition Woes Hit Stocks After Earnings Announcements
As the pharma earnings season wrapped up, it seemed like a contest to see which company's stock price dropped the most after their announcement and which made the poorest acquisition.

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Supply chain disruption fears at the start of the COVID-19 pandemic caused drug over-ordering. Imminent tariffs on drugs may have had a similar effect on pharma sales in Q1 earnings season.
The promise of innovative therapies seems to have been constrained not by efficacy or safety concerns, but because the high price of treatments is incongruous with the reimbursement of short-course therapies.
After lowering its full-year earnings guidance just six weeks before the end of 2024, Bayer, by talking up of the prospects for its new drug launches and a major clinical trial result in 2025, might risk damaging its integrity further.
CSL’s US influenza vaccine sales were a window into wider issues for vaccine manufacturers that had already impacted the fourth-quarter results of Merck, Pfizer and GSK. There could also be a correlation between lower vaccine sales and the measles outbreak in Texas.