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Transgene jumps 20% on positive cancer vaccine data in early trial

By Thomson Reuters Sep 3, 2026 | 3:22 AM

Sept 3 (Reuters) – Transgene shares surged 20% in early Paris trading on Thursday, after the French biotechnology ​company reported positive Phase 1 ‌trial data on its vaccine candidate for head and neck cancer.

Investors have rewarded encouraging data from other personalised cancer-vaccine programmes as well: Moderna shares ‌more ​than doubled after its ⁠melanoma vaccine data ⁠showed a reduction in the risk of recurrence or death.

• TG4050 is an individualised vaccine developed with Japan’s NEC Corp, ​whose AI technology selects patient-specific tumour targets, for patients with high-risk ⁠head and neck cancer ⁠after surgery and chemoradiotherapy.

• All ​16 patients treated with TG4050 remained disease-free, ​versus three relapses among 16 patients ‌in the control arm, Transgene said on Wednesday.

• Kempen analyst Chiara Montironi said the longer follow-up provided a “robust ⁠dataset” supporting TG4050’s potential to prevent relapse, which would support the stock.

• The study’s authors ⁠noted that the ‌small number of patients ⁠and events is insufficient to ​establish ‌a statistically significant benefit.

• Transgene ​expects Phase ⁠2 immunological data in the second half of 2026 and two-year efficacy data in the first quarter of 2028.

(Reporting by Lucie Barbier in Gdansk, editing by ​Milla Nissi-Prussak)