David Deak

Marbex | ES Minerals

Angel Investor Active United States
Last updated 2026-06-18
Portfolio
1
in our dataset
Rounds participated
1
Rounds led
0
Rounds' value
$27.0M
total disclosed, rounds participated
Stages

About

Marbex | ES Minerals

Portfolio · 1

Investment activity

Portfolio by sector

Energy Tech1

Q&A

What is David Deak's primary investment focus?
David Deak primarily invests in the Energy Tech sector.
Can you name a notable company in David Deak's portfolio?
A notable company in David Deak's portfolio is Addionics, which develops high-performance rechargeable batteries.
When did David Deak make his most recent investment?
David Deak made an investment in January 2022.
What stage of funding does David Deak typically participate in?
David Deak has participated in A Round funding stages.
What was the funding stage and amount for Addionics?
Addionics raised a $73M Series B round.
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Patents

EPO28