Parabilis Medicines (Nasdaq: PBLS) opened June 10 at $33.35 and closed at $31.60 on its Nasdaq debut, a 58% first-day gain after pricing an upsized $670 million IPO at $20 per share — above the previously announced $17-19 range and well past the $476 million initial target Parabilis set on June 4. The 33.5 million-share offering breaks the venture-backed biotech IPO record. Proceeds extend runway for the lead asset zolucatetide, a cell-penetrating helical peptide targeting Wnt/β-catenin in cancer, with a Phase 3 in desmoid tumors expected in the first half of 2027.
Parabilis Medicines (formerly FogPharma) set terms June 4 for a Nasdaq IPO under ticker PBLS: 25 million shares at $17-19, raising about $413 million, or up to $476 million if underwriters exercise the overallotment. Proceeds fund its lead asset zolucatetide, a cell-penetrating helical peptide that blocks beta-catenin, through dose expansion and into Phase 3 for desmoid tumors, plus studies in familial adenomatous polyposis and hepatocellular carcinoma. The offering follows a $75 million Regeneron investment tied to a collaboration worth up to $2.3 billion for antibody-helicon conjugates.
Parabilis Medicines (formerly FogPharma) filed its S-1 on May 19 to list on Nasdaq under ticker PBLS, seeking ~$100M to fund Phase 3 of zolucatetide (FOG-001), a stabilized helical peptide and the first direct inhibitor of the β-catenin:TCF interaction. As of February 16, 38 desmoid-tumor patients were dosed; 25 had sufficient follow-up to be response-evaluable, all showed tumor reduction, and 74% of the 19 patients with ≥2 post-baseline scans hit RECIST 1.1 objective response. The IPO follows a $305M Series F in January and a Regeneron research deal worth up to $2B. FDA granted fast track designation for desmoid tumors.
Obesity biotech Kailera Therapeutics priced an upsized IPO of 39.06 million shares at $16, raising $625 million — the largest venture-backed biopharmaceutical IPO since Acelyrin in 2023. Lead candidate ribupatide (a GLP-1/GIP peptide dual agonist) drove 18% body weight loss at 48 weeks in a late-stage Chinese study; global Phase 3 readout expected in 2028.