 Vaxxinity Inc. VAXX, 19.23 started its public life with a big rally, as the Texas-based biotechnology companys stock was trading more 21.2 above its initial public offering price. The company said overnight that its IPO of 6.0 million shares, down from previous expectations of a 6.7-million share offering, priced at 13 a share, below the expected range of between 14 and 16 a share. 