Primrose Bio is a San Diego, CA-based biotechnology company that develops and commercializes manufacturing technologies for biologics, mRNA and vaccine production. Its offerings include Pfenex Expression Technology, a microbial protein-production platform used in six approved products with up to 20x higher yields; Prima RNApols, RNA polymerase enzymes for scalable mRNA manufacturing; and PeliCRM197, a carrier protein used in conjugate vaccines. Several of the world's leading pharmaceutical companies, including Merck, Jazz Pharmaceuticals, Alvogen and Serum Institute of India, use Primrose's technologies in marketed products.
1
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Sep 22, 2026
Latest raise
Funding activity · 1 round
Sep 22, 2026
$-1
Series C+
Led by Signet Healthcare Partners
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