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Robert Nelsen

Co-Founder & Managing Director atArch Venture PartnersFirm active Sep 28Illinois
Arch Venture Partners websiteFirm profile

Robert Nelsen co-founded ARCH Venture Partners and has been involved in sourcing and financing over 150 companies, many reaching billion-dollar valuations.

What Robert can write

Writes checks of$25K to $30M+
Comes in atPre-seed, Seed, Series A, Series BCan lead the round
Ownership target7-10%At first check
Pitch pageSubmit on their siteThe firm asks founders to apply here.

Arch Venture Partners writes $25K to $30M+ checks, larger than 1% of firms in the atlas.

Bars: how many firms report each check band. Highlighted: Arch Venture Partners.

Companies founded

ARCH Venture Partners

Investments named in public bios

PrometheusIlluminaAlnylam PharmaceuticalsJuno TherapeuticsImpinjBeam TherapeuticsKaruna TherapeuticsAltos LabsNational ResilienceXaira TherapeuticsInsitroColossal BiosciencesPrime MedicineLyell ImmunopharmaArray BioPharmaHua Medicine

Focus

biotechnologygenomicstherapeuticsplatform technologiesearly-stage investments

Also at Arch Venture Partners

Paul Berns
Paul BernsManaging Director
Keith CrandellCo-Founder & Managing Director
Kristina BurowManaging Director
Mark McDonnellManaging Director
Steve GillisManaging Director
Brian Cuneo
Brian CuneoSenior Partner
Carol Suh
Carol SuhPartner
Corey Ritter
Corey RitterPartner

Partners like Robert

At firms with a similar stage, sector and check size.

Jim Vaughan
Jim VaughanManaging Principal & Co-Founder, VCapital
Ali Tamaseb
Ali TamasebGeneral Partner, DCVC
Jinlin WangPartner, Foothill Ventures
Arunas ChesonisManaging Partner, Safar Partners
Wally WangFounding Partner, SAV (Scale Asia Ventures)
Ann DeWitt
Ann DeWittGeneral Partner, The Engine

Alert me when Arch Venture Partners is active

One email when Robert's firm raises a fund, adds a partner or shows new activity.

Founders and investors at a Mode VC gathering

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Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.

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Questions

Who is Robert Nelsen?

Robert Nelsen co-founded ARCH Venture Partners and has been involved in sourcing and financing over 150 companies, many reaching billion-dollar valuations.

How much does Robert Nelsen invest?

Robert Nelsen invests through Arch Venture Partners, which writes checks of $25K to $30M+ at pre-seed, seed, series a, series b.

How do I pitch Robert Nelsen?

A warm intro from a founder Arch Venture Partners backed works best.

Last updated 2026-10-15. Is this you? Ask for a correction.