Pfizer PFE stock has risen 6.9% since it announced second-quarter 2026 results on Aug. 4. Pfizer delivered a solid second quarter, beating estimates for both earnings and revenues. While earnings growth was flat year over year, revenues rose 1% on an operational basis. Strength in non-COVID products continued to offset declining sales of its COVID products, Comirnaty (COVID-19 vaccine - in partnership with BioNTech [BNTX]) and Paxlovid (oral antiviral). Excluding sales from BioNTech-partnered Comirnaty and Paxlovid, revenues increased 5% operationally.
Pfizer also raised the lower end of its 2026 revenue guidance, backed by continued strong performance of its new and acquired products. The company now expects revenues between $60.5 billion and $62.5 billion, compared with the previous range of $59.5 billion to $62.5 billion. The adjusted earnings guidance was reaffirmed at $2.80-$3.00 per share. However, the guidance now absorbs a 10 cents per share charge related to its licensing deal with Chinese biotech Innovent Biologics that will be recorded in the third quarter of 2026.
However, a single quarter’s results are not so important for long-term investors. To make an informed decision on whether to buy, sell or hold the stock, it is important to evaluate the company’s fundamentals by examining its key strengths and weaknesses.
First, let’s understand the negatives.
Declining Sales of PFE’s COVID Products
During the pandemic, Pfizer generated extraordinary COVID-related sales from Comirnaty and Paxlovid. Those revenues have fallen sharply as the pandemic faded.
Sales of Pfizer’s COVID products, Comirnaty and Paxlovid, came down to around $11 billion in 2024 and $6.7 billion in 2025 from $56.7 billion in 2022. Sales of Comirnaty are declining due to a narrow recommendation for COVID vaccines in the United States, while Paxlovid is experiencing reduced demand from lower infection rates.
In 2026, Pfizer expects COVID-related revenues of approximately $4 billion, down from its previous forecast of $5 billion and below $6.7 billion generated in 2025. The decline reflects the continued normalization of COVID-19 infection rates and lower demand for COVID products. Consistent with this trend, sales of both Comirnaty and Paxlovid declined significantly during the first half of 2026.
PFE’s LOE Headwinds
Pfizer faces a significant patent cliff later this decade. Pfizer expects a significant negative impact on revenues from the loss of exclusivity (“LOE”) cliff in the 2026-2030 period as several of its key products, including Eliquis, Ibrance, Xeljanz and Xtandi, face patent expirations. The LOE cliff is expected to hurt sales by approximately $1.1 billion in 2026, which is slightly lower than the prior expectation of $1.5 billion.
PFE’s 2026 Financial Outlook Dull
Pfizer’s revenue and earnings guidance for 2026 indicates mostly flat to slightly negative year-over-year growth.
Pfizer expects total revenues for 2026 to be between $60.5 billion and $62.5 billion. The range represents a slight decline from 2025 revenues of $62.6 billion due to lower revenues from COVID products, Comirnaty and Paxlovid, and loss of revenues from the upcoming patent cliff.
In 2026, Pfizer expects adjusted earnings per share in the range of $2.80-$3.00, which represents a decline from the 2025 EPS of $3.22 due to the dilutive impact of 3SBio and Metsera deals, lower COVID revenues and higher taxes.
However, not everything is going wrong at Pfizer. Let’s see the positives.
PFE’s Non-COVID Portfolio Driving Its Next Phase of Growth
Pfizer's business mix has changed significantly over the past few years. During the pandemic, the company became heavily dependent on COVID-19 products. However, the company is gradually diversifying its portfolio through a combination of internal product launches like Abrysvo, Zavzpret, Elrexfio, Hympavzi, Litfulo and others, strategic acquisitions like Seagen, Metsera and Biohaven and the continued growth of several established brands like Vyndaqel, Padcev and Eliquis.
Pfizer expects its recently launched and acquired products to record continued double-digit growth. Reflecting this trend, sales from these products increased 22% operationally in the first quarter of 2026 and 18% in the second quarter.
PFE Enjoys a Strong Position in Oncology
Pfizer is one of the world’s leading oncology drugmakers with a broad portfolio of marketed cancer therapies as well as a deep oncology pipeline spanning multiple treatment modalities, including small molecules, antibody-drug conjugates (ADCs) and immuno-oncology biologics.
Oncology sales comprise around 27% of its total revenues. Its oncology revenues grew 5% in the first half of 2026, driven by drugs like Xtandi, Lorbrena, the Braftovi-Mektovi combination and Padcev. Pfizer considers Padcev to be a potential growth driver in the oncology segment and plans to invest in this asset.
Pfizer has ventured into the oncology biosimilars space and markets six biosimilars for cancer. It is also advancing its oncology clinical pipeline across areas such as breast, thoracic, gastrointestinal and blood cancers. Several oncology candidates have entered late-stage development, such as atirmociclib and sigvotatug vedotin. A regulatory application seeking approval of sasanlimab is also under review in the EU.
A key candidate in its oncology pipeline is PF-08634404, a dual PD-1/VEGF inhibitor in-licensed from Chinese biotech 3SBio in 2025. Pfizer has initiated nine studies, including two pivotal phase III studies for PF-08634404 in first-line metastatic colorectal cancer and first-line NSCLC. Pfizer aims to establish PF-08634404 as a potential backbone therapy across multiple tumor types. By 2030, Pfizer expects to have eight or more blockbuster oncology medicines in its portfolio.
Pfizer’s Fast Progressing Obesity Pipeline
The company is rebuilding its pipeline in oncology and obesity, which it believes can drive growth in 2028 and beyond. Pfizer plans an extensive phase III program for berobenatide, its monthly GLP-1 receptor agonist added from last year’s Metsera acquisition, in 2026. Pfizer plans to start more than 20 obesity studies in 2026, including 10 phase III studies for berobenatide for obesity and obesity-related comorbidities, including knee osteoarthritis and obstructive sleep apnea. Three phase III studies on berobenatide have already begun. Pfizer is targeting the first of a series of potential approvals for berobenatide in 2028. Pfizer is also evaluating berobenatide in combination with an amylin-based therapy, PF'3945, in phase II studies. However, in the obesity space, Pfizer lags far behind leaders like Eli Lilly LLY and Novo Nordisk NVO.
PFE Stock’s Price, Estimates & Valuation
Pfizer’s stock has risen 7.5% so far this year compared with an increase of 11.4% for the industry.
PFE Stock Underperforms Industry
Image Source: Zacks Investment Research
From a valuation standpoint, Pfizer appears attractive relative to the industry and is trading below its five-year mean. Going by the price/earnings ratio, Pfizer’s shares currently trade at 9.08 forward earnings, significantly lower than 18.53 for the industry and slightly lower than the stock’s five-year mean of 9.28. The stock is also trading below most large drugmakers like Lilly, Novo Nordisk, AstraZeneca, AbbVie, J&J and others.
PFE Stock Valuation
Image Source: Zacks Investment Research
The Zacks Consensus Estimate for 2026 earnings is stable at $2.97 per share, while that for 2027 has risen from $2.86 per share to $2.93 per share over the past 30 days.
PFE Estimate Movement
Image Source: Zacks Investment Research
Stay Invested in PFE Stock
Pfizer is navigating a difficult transition following the sharp decline in COVID-related sales from Comirnaty and Paxlovid. The market is concerned about Pfizer’s ability to replace declining COVID-related revenues and offset upcoming patent expirations through new product launches, pipeline development and contributions from acquisitions.
Although Pfizer’s 2026 sales guidance indicates minimal growth, the company expects a high single-digit revenue CAGR for five years, starting from year-end 2028. Pfizer expects its recently launched and acquired products, along with a strong pipeline, to help it return to growth from 2029 onward.
Pfizer's valuation is relatively inexpensive compared with many large pharmaceutical peers, and the stock offers one of the highest dividend yields in the sector. Pfizer’s dividend yield stands at around 6.4%
Pfizer’s significant cost reduction and efforts to improve R&D productivity measures are also driving profit growth. Pfizer expects approximately $9.7 billion in total net savings from its productivity enhancement initiative through 2029.
Long-term investors may consider retaining this Zacks Rank #3 (Hold) stock and can wait and see if Pfizer can successfully execute on its strategy and generate meaningful growth from its newer assets and restore revenue growth. You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.
Zacks' Research Chief Names "Stock Most Likely to Double"
Our team of experts has just released the 5 stocks with the greatest probability of gaining +100% or more in the coming months. Of those 5, Director of Research Sheraz Mian highlights the one stock set to climb highest.
This top pick is a little-known satellite-based communications firm. Space is projected to become a trillion dollar industry, and this company's customer base is growing fast. Analysts have forecasted a major revenue breakout in 2025. Of course, all our elite picks aren't winners but this one could far surpass earlier Zacks' Stocks Set to Double like Hims & Hers Health, which shot up +209%.
Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report

(0) comments
Welcome to the discussion.
Log In
Keep it Clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language.
PLEASE TURN OFF YOUR CAPS LOCK.
Don't Threaten. Threats of harming another person will not be tolerated.
Be Truthful. Don't knowingly lie about anyone or anything.
Be Nice. No racism, sexism or any sort of -ism that is degrading to another person.
Be Proactive. Use the 'Report' link on each comment to let us know of abusive posts.
Share with Us. We'd love to hear eyewitness accounts, the history behind an article.