Fundraising Fox
/People
Sign in

Robert Nelsen

InvestorFounder

Co-founder & Managing Director at ARCH Venture Partners · Co-Founder & Board Chair at RIPPL Care

New York, New York

Writes $50K – $150M checks · typically $75M

FoundedRIPPL Care

Midas 2025 · #92Midas 2024 · #92Midas 2023 · #99Midas 2022 · #72Midas 2021 · #48Midas 2020 · #28Midas 2019 · #33Midas 2018 · #5Midas 2017 · #16Midas 2016 · #16

Find your path to Robert

Sign up to see every warm intro you have to Robert

  • Paths you didn't know you had: your email and LinkedIn already hold routes to Robert. We find them for you
  • 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
  • Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Sign up with GoogleAlready have an account? Log in

About

Robert Nelsen identifies nascent university and national-lab deep-science ideas with a biology and economics background, getting involved extremely early to build companies from the lab bench up with repeat executives.

Contact· self-published, not guessed

Invests in

AI & Machine LearningBiotechDeep TechHardwareHealthtechMedical Devices

Co-Founder & Board Chair at RIPPL Care

Intro paths

→

In turn, Robert can intro founders to RIPPL Care's investors below.

RIPPL Care's investors · 9

1843 CapitalWashington · since 2024ARCH Venture PartnersChicago · $50K – $250M checks · since 2024City LightNew York · $1M – $6M checks · since 2024Equitage Ventures, L.L.C.Denver · $250K – $2.5M checks · since 2024F-Prime CapitalCambridge · $3M – $10M checks · since 2024General CatalystSan Francisco · $30M checks · since 2024GV (Google Ventures)Mountain View · $250K – $50M checks · since 2024Kin VenturesSeattle · since 2024Mass General Brigham VenturesBoston · since 2022

Co-founders at RIPPL Care

KEKris Engskov
Kris EngskovCo-founder & CEO

Deals · 11

High Plains Partners, LLCBoard seat

via ARCH Venture Partners · filed Oct 2022 · $230M raise

Apex Neuro Holdings, Inc.Board seat

via ARCH Venture Partners · filed Mar 2022 · $10M raise

Nutcracker TherapeuticsBoard seat

via ARCH Venture Partners · filed Sep 2021 · $200M raise

XtremityBoard seat

via ARCH Venture Partners · filed Jun 2021 · $15M raise

InsitroBoard seat

via ARCH Venture Partners · filed May 2020 · $143.2M raise

GrailBoard seat

via ARCH Venture Partners · filed May 2020 · $425M raise

Beam TherapeuticsBoard seat

via ARCH Venture Partners · filed Mar 2019 · $83.6M raise

Gossamer BioBoard seat

via ARCH Venture Partners · filed Jan 2018 · $80M raise

ArivaleBoard seat

via ARCH Venture Partners · filed Jun 2017 · $30M raise

Sienna BiopharmaceuticalsBoard seat

via ARCH Venture Partners · filed May 2017 · $40.5M raise

Sapphire EnergyBoard seat

via ARCH Venture Partners · filed Dec 2015 · $92M raise

Attribution from SEC filings, press coverage, and firm rosters.

Other disclosed investments

Sources: SEC Form D filings · curated public sources.

Colleagues at ARCH Venture Partners

Ari Nowacek
Partner at ARCH Venture Partners
Ari Nowacek, M.D, Ph.D.
Partner at ARCH Venture Partners
Axel Bouchon
Venture Partner at ARCH Venture Partners
Axel Bouchon, Ph.D.
Venture Partner at ARCH Venture Partners
Brian Cuneo
Senior Partner at ARCH Venture Partners
Carol Suh
Partner at ARCH Venture Partners
Clinton Bybee
Co-founder & Managing Director, Emeritus at ARCH Venture Partners
Corey Ritter
Partner at ARCH Venture Partners

Network5

Bilal ZuberiScout
Founder and Managing Partner at Red Glass Ventures
Brad ZionsScout
General Partner at Pitbull Ventures
Brett CookScout
Partner at F-Prime Capital Partners
Dana SettleScout
Co-Founder & Managing Partner at Greycroft
Glen TullmanScout
Partner at 7wire Ventures

Investors connected to Robert in public investor directories — a warm-intro map.

Frequently asked questions

Who is Robert Nelsen?
Robert Nelsen identifies nascent university and national-lab deep-science ideas with a biology and economics background, getting involved extremely early to build companies from the lab bench up with repeat executives.
Where does Robert Nelsen work?
Robert Nelsen is Co-Founder & Board Chair of RIPPL Care and Co-founder & Managing Director at ARCH Venture Partners.
What does Robert Nelsen invest in?
Robert Nelsen invests in AI & Machine Learning, Biotech, Deep Tech, Hardware, Healthtech, Medical Devices.
What check size does Robert Nelsen write?
Robert Nelsen typically writes checks of $50K – $150M.
What companies did Robert Nelsen found?
Robert Nelsen founded RIPPL Care.
What boards does Robert Nelsen sit on?
Robert Nelsen holds tracked board seats at Apex Neuro Holdings, Inc., Arivale, Beam Therapeutics, Gossamer Bio, Grail, High Plains Partners, LLC, Insitro, Juno Therapeutics, Neumora Therapeutics, Nutcracker Therapeutics.
What companies has Robert Nelsen invested in?
Investments tracked here include Aera Therapeutics, Agios Pharmaceuticals, Akamis Bio, Arivale, Astromech, BE Biopharma, Brii Biosciences, City Therapeutics, Colossal Biosciences, Denali Therapeutics, Dispatch Bio, Elixir Pharmaceuticals, and 43 more.

Founder mafias

About this profile. Compiled from public sources — ARCH Venture Partners's own website, regulatory filings and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights