STACT specifically enriches in many types of solid tumors and not in healthy tissue. Once there, STACT delivers multiplexed immuno-modulatory payloads directly to tumor-resident immune cells. Many of these payload targets are of significant interest to the biopharmaceutical community but are intractable using conventional approaches due to systemic toxicities after intravenous dosing. Furthermore, STACT has been engineered to deliver payload combinations, which facilitates engagement of multiple biological pathways from a single therapy.

In April of 2020, Actym raised $34 million in a Series A financing, co-led by Boehringer-Ingelheim Venture Fund and Panacea Venture Healthcare, with participation from Illumina Ventures, Korea Investment Partners, and JLO Ventures.