About Alexander Hartz
Alex Hartz is a general partner at Shine Capital, which led Antares's $96 million Series B in December 2025.
Antares's announcement of the round quoted him as saying that no nuclear startup had turned on a fission reactor this century.
Experience
This experience comes from official bios and from SEC filings. For roles taken from filings, the years are when the filings name Alexander Hartz in the role, so the role may have started earlier or lasted longer.
SC
Shine Capital Current
General Partner
Antares Nuclear, Inc.
Director
2025 – 2026 · Torrance, CA
Antares designs and builds small nuclear reactors in Torrance, California, to give U.S. military bases and space missions years of power without refueling.
Key Colleagues at Startups
The people Alexander Hartz works with at each company, as listed on that company's latest Form D.
Antares Nuclear, Inc. · Form D, Aug 18, 2026
JA
Jack Altman
Director
JD
Julia DeWahl
Co-founder and director
JB
Jordan Bramble
CEO & Co-Founder, director
AP
Alana Palmedo
Director