Where does Robert Nelsen work?

Robert Nelsen is Co-Founder & Board Chair of RIPPL Care and Co-founder & Managing Director at ARCH Venture Partners and Board director at Seaport Therapeutics and Board director at Neumora Therapeutics.

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, Medical Creations, National Resilience, Inc..

Robert Nelsen

InvestorFounder

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

New York, New York

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

FoundedRIPPL Care

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

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

r•••@archventure.comreveal

Invests in

AI & Machine LearningBiotechDeep TechHardwareHealthtechMedical Devices

Board director at Seaport Therapeutics

Intro paths

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In turn, Robert can intro founders to Seaport Therapeutics's investors below.

Seaport Therapeutics's investors · 5

ARCH Venture PartnersChicago · $50K – $250M checks · since 2024 Foresite CapitalWest Hollywood · since 2024 HAWKTAILSan Francisco · since 2024 PureTech HealthBoston · since 2024 Sofinnova VenturesMenlo Park · $100K – $15M checks · since 2024

Co-founders at Seaport Therapeutics

Daphne ZoharFounder, CEO and Board Member

Co-Founder & Board Chair at RIPPL Care

Intro paths

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

RIPPL Care's investors · 6

1843 CapitalWashington · since 2024 ARCH Venture PartnersChicago · $50K – $250M checks · since 2024 City LightNew York · $1M – $6M checks · since 2024 Equitage Ventures, L.L.C.Denver · $250K – $2.5M checks · since 2024 General CatalystSan Francisco · $30M checks · since 2024 GV (Google Ventures)Mountain View · $250K – $50M checks · since 2024

Co-founders at RIPPL Care

Kris EngskovCo-founder & CEO

Board director at Neumora Therapeutics

Intro paths

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In turn, Robert can intro founders to Neumora Therapeutics's investors below.

Neumora Therapeutics's investors · 8

ARCH Venture PartnersChicago · $50K – $250M checks · since 2023 Catalio Capital Management, LPNew York · since 2020 F-Prime CapitalCambridge · $3M – $10M checks · since 2023 K2 HealthVenturesBoston · $10M – $100M checks · since 2020 Mercury FundHouston · $250K – $4M checks · since 2020 Newpath PartnersBoston · $50K – $10M checks · since 2020 Premier PartnersSeoul · since 2020 SoftBank Vision FundLondon · since 2020

Deals · 15

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

Medical CreationsBoard seat

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

National Resilience, Inc.Board seat

via ARCH Venture Partners · filed Jan 2021 · $755M raise

InsitroBoard seat

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

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GRAILBoard seat

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

Beam TherapeuticsBoard seat

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

Vir BiotechnologyBoard seat

via ARCH Venture Partners · filed Jun 2018

Syros Pharmaceuticals, Inc.Board seat

via ARCH Venture Partners · filed Feb 2018 · $11.4M raise

Gossamer BioBoard seat

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

Juno TherapeuticsBoard seat

via ARCH Venture Partners · filed Jun 2017

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

Board seats

Neumora Therapeutics RIPPL Care Sana Biotechnology Seaport Therapeutics Unity Biotechnology

Per SEC Form D filings.

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 and Board director at Seaport Therapeutics and Board director at Neumora Therapeutics.
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, Medical Creations, National Resilience, Inc..