Thomas Sohmers

Companies founded

Positron

CEO · CTO · Founder · 2023 – present

$5B valuation (2026)Unicorn

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REX Computing

CEO · Founder · 2013 – 2017

$7.8M valuation (2015)

Work history

Past roles by Dealroom records.

Groq

Director · 2021 – 2023

$3.5B valuation (2026)Unicorn

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Lambda

Principal Hardware Architect · 2020 – 2021

$9B valuation (2025)Unicorn

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Atomic

Founder in Residence · 2012 – 2019

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The Thiel Foundation

Talks 1

Interviews and talks Dealroom has written up, with the key moments.

Positron's Thomas Sohmers: AI inference's real bottleneck is memory, not compute

20VC · Sept 2026

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