F5 Networks, a publicly traded provider of application security and delivery tools, announced that it is acquiring Volterra, a distributed cloud services company. Under terms of the deal, Seattle-based F5 said it will pay $440 million in cash and “approximately $60 million in deferred consideration and assumed unvested incentive compensation to founders and employees.” Founded in 2017, Santa Clara, California-based Volterra previously raised $50 million in known venture funding, per Crunchbase data. • Affinivax lands $226M for vaccine program: Cambridge-based Affinivax, a biopharmaceutical company focused on a pipeline of vaccines targeting infectious diseases, closed on a $226 million Series C round of funding co-led by new investors Rock Springs Capital and Foresite Capital. • Jobandtalent raises $108M: Madrid-based Jobandtalent, an online platform for finding and filling gig-type jobs, raised $108 million in an extension to its Series C round led by InfraVia. • Bakkt eyes public debut via SPAC: Cryptocurrency platform Bakkt is in advanced talks to go public through a merger with blank-check firm VPC Impact Acquisition Holdings, according to a Bloomberg report citing people with knowledge of the matter.