The Zurich-based developer is increasingly focusing its pipeline on radiopharmaceutical cancer therapies. A recent development agreement with isotope specialist Eckert & Ziegler marks another step in that direction. The collaboration aims to develop and manufacture so-called Radio-DARPin therapeutics, in which targeted protein molecules deliver radioactive isotopes directly to tumours. Early clinical data on the DARPin molecules in combination with radioisotopes suggest targeted tumour localisation. Proof of efficacy, however, is still pending.
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Zurich-based oncology biotech Araris Biotech AG has entered into a research collaboration with an option to license with Japan’s Chugai Pharmaceutical, a subsidiary of Roche. The aim of the partnership is to develop next-generation antibody–drug conjugates (ADCs). While Araris itself is now Japanese-owned – a wholly owned subsidiary of Taiho Pharmaceutical, part of the Otsuka Group – its research activities remain firmly rooted in Zurich. That presence was highlighted last year when the Strüngmann brothers, German billionaire twins, awarded a prize to the company’s founders.
Just over a year and a half ago, Swiss biotech Numab AG, based in Horgen on Lake Zurich, made the headlines when it sold a single antibody to Johnson & Johnson for US$1.25 billion via a spin-out vehicle. No back-loaded milestones, no future contingencies — but cash up front, as one might say, straight into the pocket.
The Dutch-Swiss company with operations also in Zurich, Switzerland, has raised US$73m in a Series B and will continue to expand its AI research, sales, and operations teams. The new announcement comes around a year after raising €21.92m in a Series A funding round.


Molecular Partners AG & NuMeRI, presentation Feb. 2026
Araris Biotech AG
Freepik.com
Cradle.bio