Investing Profile

Robert Nelsen

VCInvestorAngel
Co-founder and a Managing Director of ARCH Venture Partners
archventure.com/team/robert-t...New York, New York
Photo of Robert Nelsen, Managing Director at ARCH Venture Partners
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Current Investing Position
ARCH Venture Partners Managing Director
Investment Range
$50K - $150.0M
Sweet Spot
$75.0M
Investments On Record
100
Current Fund Size
$635.8M

Robert Nelsen is on these Sector & Stage Rankings

Robert Nelsen's Investments On Record (55)

CompanyStageDateRound SizeTotal Raised
Moonwalk Biosciences
Series BSep 2026$70M
Series AJan 2024$57M
$130M
Co-investors: Anthony Philippakis (GV (Google Ventures))
Astromech
SeedAug 2026$20M
$20M
LifeMine Therapeutics
Series EAug 2026$190M
Series CMar 2022$180M
Series ASep 2017$70M
$560M
Co-investors: Krishna Yeshwant (GV (Google Ventures)), Jim Tananbaum (Foresite Capital Management)
Trase
SeedJun 2026$110M
$110M
City Therapeutics
Series BJun 2026$100M
Series AOct 2024$140M
$240M
Co-investors: Ari Nowacek (ARCH Venture Partners)
Paradigm
Series BDec 2025$78M
Series AJan 2023$200M
$320M
Co-investors: David Schenkein (GV (Google Ventures)), Hemant Taneja (General Catalyst), Balaji Srinivasan (Andreessen Horowitz), Niko Bonatsos (General Catalyst), Elena Viboch (General Catalyst), Max Rimpel (General Catalyst), Bilal Zuberi (Lux Capital), Stephen Knight (F-Prime Capital Partners), Brett Cook (F-Prime Capital Partners), Ramnik Arora (Original Capital), Arash Ferdowsi (Dropbox), Eoghan McCabe (Spark-Local, Inc), Jay Markowitz (ARCH Venture Partners), Alaa Halawa (Mubadala), Justin Kao (DFJ Growth), Jared Friedman (Y Combinator), Scott Belsky (A24), Karim Atiyeh
SciNeuro
Series UnknownDec 2025$53M
Series ADec 2020$100M
$150M
Synchron
Series DNov 2025$200M
Series CDec 2022$75M
$320M
Co-investors: Alex Morgan (Khosla Ventures), Christian Angermayer (Presight Capital), Thomas Reardon (WestView Capital Partners), Ari Nowacek (ARCH Venture Partners), Chris Sklarin (Castor Ventures)

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