Attralus’ $116 Million Series B Financing

Wilson Sonsini Goodrich & Rosati advised Logos Capital on the deal while Sidley represented Attralus, Inc.

Attralus, Inc., a clinical stage biopharmaceutical company developing transformative medicines to improve the lives of patients with systemic amyloidosis, has closed a $116 million Series B financing. The financing round was led by Logos Capital and included participation from Janus Henderson Investors, Redmile Group, Samsara BioCapital, Sarissa Capital Management, Surveyor Capital (a Citadel company), and Vivo Capital. Founding investor, venBio Partners, also participated in the financing.

Proceeds from the financing will be used to prepare the advancement of Attralus’ PAR therapeutics into clinical trials. The first PAR therapeutic, AT-03, is expected to begin a Phase 1 biodistribution study in systemic amyloidosis patients. Additionally, the company plans to advance the AT-01 clinical program, an amyloid-specific imaging radiotracer for the diagnosis of systemic amyloidosis. The funding will also enable the company to expand its team and infrastructure to support future growth.

The Wilson Sonsini team that represented Logos Capital in the transaction included: Dan Koeppen (Picture), Meg Burton, Tim Conroy, Mike Hostetler and Katherine Fisk.

The Sidley deal team was led by Mehdi Khodadad and included Mark Castiglia, Anthony Friedman, Ryan Hicks, Max Chaffetz, and Jin Choi (paralegal) with support from Eric Kauffman (Employment), Stacy Crosnicker (Employee Benefits and Executive Compensation), Torrey Cope (Food, Drug, and Medical Device Regulatory), as well as Dusan Clark and Kim Littlejohn (paralegal) (both Technology and IP Transactions).

Involved fees earner: Mark Castiglia – Sidley Austin LLP; Max Chaffetz – Sidley Austin LLP; Dusan Clark – Sidley Austin LLP; Torrey Cope – Sidley Austin LLP; Stacy Crosnicker – Sidley Austin LLP; Anthony James Friedman – Sidley Austin LLP; Ryan Hicks – Sidley Austin LLP; Eric Kauffman – Sidley Austin LLP; Mehdi Khodadad – Sidley Austin LLP; Meghan Burton – Wilson Sonsini Goodrich & Rosati; Tim Conroy – Wilson Sonsini Goodrich & Rosati; Katherine Fisk – Wilson Sonsini Goodrich & Rosati; Michael Hostetler – Wilson Sonsini Goodrich & Rosati; Dan Koeppen – Wilson Sonsini Goodrich & Rosati;

Law Firms: Sidley Austin LLP; Wilson Sonsini Goodrich & Rosati;

Clients: Attralus; Logos Capital;

Author: Martina Bellini