Frazier Life Sciences
1001 Page Mill Road Building 4, Suite 200B, Palo Alto, CA, 94304, United States
Overview
Frazier Life Sciences IX is a venture capital fund. Frazier Life Sciences invests in and builds companies developing and commercializing novel therapeutics at all stages, from company formation to public.
- Total investments
- 44
- Lead investments
- 19
- Investments · 12mo
- 17
- Active investors
- 7
Investment portfolio
- Slate Medicines
Led · Equity · Aug 2026
Slate Medicines is advancing a pipeline of migraine antibody therapeutics designed to go beyond existing CGRP-targeted treatments. Its lead candidate, SLTE-1009 (licensed from DartsBio Pharmaceuticals), is a monoclonal antibody that targets both PACAP and VIP, and the company’s second program, SLTE-2100, is a bispecific antibody combining CGRP and PACAP/VIP blockade. Slate plans to report Phase I safety and PK data for SLTE-1009 in mid-2027 and to start a Phase II migraine study in the second half of 2027. The company positions its dual-targeting approach as potentially offering greater efficacy versus PACAP-only therapies in a market where CGRP-targeted products generated roughly $5 billion in 2025 sales. Slate recently secured a $245 million financing via a reverse merger and private placement and had raised $130 million in a Series A earlier the same year, giving it runway into 2029.
- Crystalys Therapeutics
Led · Series B · Jul 2026
Crystalys is advancing dotinurad, a next-generation, once-daily oral URAT1 inhibitor positioned as a second-line therapy to reduce uric acid, gout flares and tophi. Dotinurad was invented by Fuji Yakuhin and has regulatory approvals in Japan, China, the Philippines, Taiwan and Thailand, with supporting clinical data from those markets. The company is conducting the JEWEL clinical research program, which includes the Phase 3 RUBY and TOPAZ trials and the Phase 2 AMETHYST study to evaluate safety and efficacy across a broad spectrum of gout patients. Crystalys aims to position dotinurad as a best-in-class option for safety and efficacy and is preparing for global commercialization. The company is headquartered in San Diego and was co-founded by Catalys Pacific and Novo Holdings. With the announced $130 million Series B, Crystalys has increased its financial runway to support late-stage development and commercial readiness.
- RQ Bio
Led · Series A · Jun 2026
Founded in 2021, RQ Bio is developing long-acting monoclonal antibody therapeutics aimed at providing immediate and durable protection against seasonal influenza. Its lead programme, RQB01, is in IND-enabling studies and is designed to deliver broad strain coverage and extended duration of action via a differentiated dual mechanism targeting conserved epitopes. The company aims to provide season-long protection with a single administration, particularly for immunocompromised and high-risk patients. RQ Bio has an experienced team with prior success in developing long-acting antiviral antibodies and is backed by a syndicate of life sciences investors. The recent $115 million Series A will fund clinical development of RQB01 and further advance the company's antibody discovery platform. Leadership was strengthened with the appointment of Christian S. Schade as Executive Chairman.
- cAMPfield Therapeutics
Participated · Series A · May 2026
cAMPfield Therapeutics is a newly formed biotechnology company backed by Mountainfield Venture Partners and other life-science investors to advance licensed development-stage therapeutic candidates. Its CEO, Bill Gerhart, has more than two decades of experience in pulmonary, fibrosis, and inflammatory diseases and a track record of leading biotech exits. Other senior leaders include CTO Patricia Turney and global head of regulatory affairs Rita Shah. Public filings and reporting link cAMPfield to vTv Therapeutics' HPP737, a PDE4 inhibitor that has been studied in China for psoriasis, COPD, atopic dermatitis, and idiopathic pulmonary fibrosis, including an ongoing Phase 3 psoriasis trial there. The company's explicit pipeline needs are not detailed in the coverage, nor are financial metrics beyond the $180 million Series A. cAMPfield appears positioned to progress licensed candidates through clinical development with capital from its recent financing.
- Sidewinder Therapeutics
Led · Series B · Apr 2026
Sidewinder Therapeutics is focused on engineering next-generation bispecific ADCs that target tumor-specific receptor co-complexes to enhance tumor specificity and internalization. The company’s pipeline targets indications including squamous cell carcinomas of the lung and head and neck and gastrointestinal cancers such as colorectal cancer. Sidewinder was founded in 2023 and is headquartered in San Diego. It has partnered with Lonza to apply Synaffix’s site-specific linker‑payload platform across multiple programs. The company plans to advance its lead program into clinical development in 2027. Financially, Sidewinder has raised a total of $162 million following the $137 million Series B.