TIER IV, Inc. (Ticker: 593A JP) is a Japanese software company developing autonomous driving systems and intelligent vehicle platforms based on open-source Autoware software. The company is domiciled in Japan and headquartered in Tokyo. TIER IV plans to list on the Tokyo Stock Exchange Growth Market on July 22, 2026, offering 21.42 million shares at JPY 1,085 per share to raise approximately JPY 23.24 billion, or about $145 million. The estimated market capitalization at offer is approximately $430 million.

According to published terms, 17.45 million shares, or 81.47% of the offering, are primary shares, while 3.97 million shares, or 18.53%, are secondary shares sold by private investors. The offering also includes a 15% greenshoe facility of 3.21 million shares. TIER IV was founded in December 2015 by Shinpei Kato, its founder and CEO, and operates through subsidiaries and affiliated companies including Tier IV North America, Human Dataware Lab., MAP IV, AI driving school, and eve autonomy. Managers include Mitsubishi UFJ Morgan Stanley Securities, Morgan Stanley, and SMBC Nikko Securities.