BioNTech slides as Q1 revenue miss and wider loss outweigh planned $1B buyback

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BioNTech shares fell after it posted Q1 2026 revenue of €118.1 million, well below the €185.6 million consensus, alongside a net loss of €531.9 million as R&D spending stayed elevated. The company reaffirmed full-year 2026 revenue guidance of €2.0–€2.3 billion and disclosed plans for up to a $1.0 billion ADS buyback over 12 months.

1) What’s moving the stock today (May 5, 2026)

BioNTech (BNTX) is trading lower after reporting first-quarter 2026 results that came in meaningfully below top-line expectations. Revenue was €118.1 million versus a €185.6 million consensus figure highlighted by earnings feeds, while losses widened as the company continued to fund late-stage oncology and antibody-drug conjugate programs. (streetinsider.com)

2) Key numbers that pressured sentiment

BioNTech reported a Q1 2026 net loss of €531.9 million (adjusted net loss €494.6 million) with diluted loss per share of €2.10 (adjusted €1.95). Management attributed the year-over-year revenue decline primarily to lower COVID-19 vaccine revenues, while R&D expense rose to €557.0 million as development work expanded across immuno-oncology and ADC programs and as acquired entities were integrated. (globenewswire.com)

3) Guidance and capital return: support, but not enough to offset the miss

BioNTech reaffirmed its full-year 2026 revenue guidance range of €2.0–€2.3 billion, keeping the near-term financial trajectory anchored to a lower-COVID baseline while spending remains heavy. The company also said it plans a share repurchase program of up to $1.0 billion in ADSs over the next 12 months, but the market reaction suggests investors are prioritizing the near-term revenue reset and loss profile over the buyback headline. (globenewswire.com)

4) What to watch next

Investors are likely to focus on whether upcoming late-stage oncology data readouts can de-risk the pipeline and improve the visibility of a path from R&D-heavy quarters to commercialization. BioNTech described 2026 as a catalyst-rich year with multiple expected late-stage readouts across immunomodulators, ADCs, and mRNA cancer immunotherapies, making upcoming clinical updates the next major driver for the stock. (globenewswire.com)