Arthrosi’s $153 million Series E to take pozdeutinurad through late-stage development

9 October 2025

San Diego-based Arthrosi Therapeutics, a biotech developing highly potent and selective next generation URAT1 inhibitor to reduce serum urate (sUA) levels, flares, and dissolve tophi in gout and tophaceous gout patients, has announced the closing of its $153 million Series E financing.

Arthrosi plans to use the proceeds from this financing to complete the clinical development of its lead program, pozdeutinurad, through its replicate Phase III REDUCE 1 and REDUCE 2 studies in gout and tophaceous gout.

The commitment from both new and existing investors provides further validation for pozdeutinurad

This article is accessible to registered users, to continue reading please register for free. A free trial will give you access to exclusive features, interviews, round-ups and commentary from the sharpest minds in the pharmaceutical and biotechnology space for a week. If you are already a registered user please login. If your trial has come to an end, you can subscribe here.

Try before you buy

Free

7 day trial access

Take a Free Trial

All the news that moves the needle in pharma and biotech
Exclusive features, podcasts, interviews, data analyses and commentary from our global network of life sciences reporters.
Receive The Pharma Letter daily news bulletin, free forever.

Become a subscriber

£820

Or £77 per month

Subscribe Now

Unfettered access to industry-leading news, commentary and analysis in pharma and biotech.
Updates from clinical trials, conferences, M&A, licensing, financing, regulation, patents & legal, executive appointments, commercial strategy and financial results.
Daily roundup of key events in pharma and biotech.
Monthly in-depth briefings on Boardroom appointments and M&A news.
Choose from a cost-effective annual package or a flexible monthly subscription

The Pharma Letter is an extremely useful and valuable Life Sciences service that brings together a daily update on performance people and products. It’s part of the key information for keeping me informed

Chairman, Sanofi Aventis UK