About William Leszinske, Jr.
William Leszinske, Jr. is a director of Numem Inc. of Sunnyvale, California, which makes MRAM memory cores and chiplets for chip designers.
Experience
This experience comes from official bios and from SEC filings. For roles taken from filings, the years are when the filings name William Leszinske, Jr. in the role, so the role may have started earlier or lasted longer.
Numem Inc. Current
Director
2023 – Present · Sunnyvale, CA
Numem builds MRAM memory cores and chiplets that serve as an alternative to SRAM and Flash, for products from wearables to data centers.
Key Colleagues at Startups
The people William Leszinske, Jr. works with at each company, as listed on that company's latest Form D.
Numem Inc. · Form D, Oct 28, 2026