2 Headwinds Facing Pfizer Stock Going Into 2026

Group 1 - Pfizer has faced significant challenges since achieving $100 billion in annual sales in 2022, with obstacles expected to impact its long-term prospects heading into 2026 [1] - The company's COVID vaccine, Comirnaty, generated $2.1 billion in revenue through the first nine months of 2023, reflecting a 6% increase compared to the same period in the previous fiscal year [2] - Stricter FDA requirements for vaccine eligibility and updated vaccine approvals could negatively affect Comirnaty's sales, which accounted for 4.7% of Pfizer's total revenue through September 30 [4][5] Group 2 - Pfizer is facing a wave of patent cliffs starting in 2026, with the loss of patent exclusivity for several products, including Xeljanz, which is set to lose U.S. patent protection next year [6] - Xeljanz's sales have already declined by 7% year over year to $763 million through the first nine months of 2025, indicating that the impact of patent loss may not be significant for this product [6]