The filed complaint alleges that defendants made false statements and/or concealed that: (i) izokibep, the Company's lead product candidate, was less effective in treating Hidradenitis Suppurativa than defendants had led investors to believe; (ii) accordingly, Acelyrin overstated izokibep’s clinical and/or commercial prospects; (iii) as a result, Acelyrin also overstated the Company’s business prospects post-initial public offering; and (iv) as a result, the Company’s public statements were materially false and misleading at all relevant times.