Pharma BD Deal Intelligence

Boehringer Ingelheim International GmbH / T3 Pharmaceuticals AG

2023 · Acquisition/Merger · $508M · Complete

Outcome grade pending — assessed 5 years post-close.

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The coverage arc

Nov 22, 2023 BioPharma Dive Neutral

Boehringer Ingelheim is acquiring T3 Pharmaceuticals, a Swiss developer of engineered bacteria-based cancer therapies, in a deal worth up to about…

Nov 22, 2023 Fierce Biotech Bullish

Boehringer Ingelheim has agreed to buy Swiss biotech T3 Pharmaceuticals in a deal worth up to CHF 450 million (roughly $508 million), expanding the German…

Apr 13, 2026 ClinicalTrials.gov (NCT05120596) Neutral

First-in-human Phase 1/2 study of T3P-Y058-739, a genetically-modified, live attenuated strain of Yersinia enterocolitica, in patients with advanced solid…

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Boehringer Ingelheim acquired Swiss biotech T3 Pharmaceuticals AG for up to CHF 450M (~$508M), gaining T3P-Y058-739, a Phase 1/2 engineered live-bacterial cancer therapy for advanced solid tumors. The asset is a genetically-modified, live attenuated strain of Yersinia enterocolitica that uses the bacterial type III secretion system to micro-inject immunomodulatory proteins (RIG-I CARD and cGAS, driving type I interferon production) directly into the tumor microenvironment while sparing healthy tissue. The buyout, which builds on a research collaboration running since 2018, deepens Boehringer's cancer-immunology portfolio with a non-checkpoint platform modality. Upfront undisclosed; milestone-based portion ~$268M. As of April 2026 the first-in-human study (NCT05120596) remained recruiting, evaluating intratumoral and intravenous monotherapy plus a pembrolizumab combination, with primary completion estimated for early 2027.

Key facts

Related deals — scored

DealYearValueOutcome
Boehringer Ingelheim International GmbH / T3 Pharmaceuticals AG (this deal)2023$508M
Boehringer Ingelheim International GmbH / Sanofi SA (Merial Animal Health)2015$12.4B81
Boehringer Ingelheim International GmbH / Abexxa Biologics Inc.2021
Boehringer Ingelheim International GmbH / Cue Biopharma, Inc.2025$357M
Boehringer Ingelheim International GmbH / Synaffix B.V.2025$1.3B
Boehringer Ingelheim International GmbH / Immunitas Therapeutics, Inc.2026
Boehringer Ingelheim International GmbH / Immunai Inc.2026$15M

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