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Theriva Biologics sells SYN-004 antibiotic enzyme portfolio to Biossil Labs for $350K upfront plus milestones.

Company Fundamentals
02 Nov 2026, 15:00 WIB
GlobeNewsWire
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Bullish
Theriva Biologics sells SYN-004 antibiotic enzyme portfolio to Biossil Labs for $350K upfront plus milestones.

Theriva Biologics has sold its antibiotic-degrading enzyme portfolio, including SYN-004 (ribaxamase), to Biossil Labs for an upfront payment of $350,000 and potential milestones up to $91 million plus royalties. Biossil Labs will take over all development and commercialization responsibilities. SYN-004 aims to protect the gut microbiome during antibiotic treatment and reduce infections like C. difficile and antibiotic-resistant bacteria. The sale allows Theriva to focus on its cancer therapeutics while Biossil advances ongoing clinical trials, including a Phase 1b/2a study on preventing complications in transplant patients.

Theriva Biologics' recent sale of its SYN-004 enzyme portfolio comes as a backdrop to the health sector's activity on Pluang. For readers following health stocks, here is Pluang's market snapshot as of Nov 02, 2026 19:21 WIB: out of 150 priced US health-sector stocks, 82 rose and 47 fell. Notable movers include RLAY at USD 18.75 (+2.18%), TWST at USD 156.06 (+2.15%), and NTRA at USD 423.00 (+2.13%), with typical hold times ranging from 18 to 27 days on Pluang.

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