Fundraising Fox

Rick Grinnell

Investor

Managing Partner at Glasswing Ventures

Cambridge, Massachusetts

Writes $100K – $5M checks · typically $1.5M

About

Rick Grinnell combines deep engineering expertise—co-creating video compression used by Zoom and FaceTime—with 20+ years investing in security and infrastructure, a unique AI-for-data security thesis, and MIT/Harvard ties.

LinkedIn ↗X / Twitter ↗

Invests in

AI & Machine LearningCybersecurityData & InfrastructureDeveloper ToolsEnterprise Software

Experience

  1. Glasswing VenturesFounder and Managing Partnercurrent2016 — presentGreater Boston
  2. Realm.Security, IncBoard of Directorscurrent2024 — presentBoston, Massachusetts, United States
  3. Allure SecurityBoard Of Directorscurrent2017 — presentWaltham, MA
  4. TrustleBoard of Directorscurrent2022 — present
  5. LambentBoard Of Directorscurrent2018 — presentGreater Boston
  6. NametagInvestorcurrent2021 — presentSeattle
  7. Narrative I/OBoard of Directorscurrent2024 — presentNew York, New York, United States
  8. CeritasInvestorcurrent2022 — present
  9. Tidal CyberInvestorcurrent2022 — presentWashington DC-Baltimore Area
  10. Museum of Science, BostonMember of the Board of Advisorscurrent2011 — presentGreater Boston
  11. Slone Partners CybersecurityAdvisory Board Member2020 — 2024
  12. Terbium LabsBoard Of Directors2017 — 2021Washington DC-Baltimore Area
  13. CPX Security/Pwnie ExpressBoard Director2013 — 2021Boston, MA
  14. Big Brothers Big Sisters of Massachusetts BayBoard Director2011 — 2019Greater Boston
  15. TrackVia, Inc.Board Director2012 — 2019
  16. PrelertBoard Director2010 — 2016Framingham, MA
  17. Fairhaven Capital PartnersManaging Director2007 — 2016Cambridge, MA
  18. Resilient Systems, Inc.Board Director2010 — 2016Cambridge, MA
  19. VeloBit, Inc.Board Director2011 — 2013Greater Boston
  20. Equallogic StorageBoard Director2005 — 2008Nashua, NH

Education

  1. Harvard Business SchoolMBA1998 — 2000
  2. Massachusetts Institute of TechnologyS.M., Electrical Engineering and Computer Science1992 — 1993
  3. Massachusetts Institute of TechnologyS.B., Electrical Engineering and Computer Science1988 — 1992

Skills & more

Strategy8Venture Capital44Start-ups51Go-to-market Strategy7Strategic Partnerships33Product Management11Entrepreneurship11Mergers1Mobile Devices3Business Development5SaaS8Enterprise Software13

Languages French

From Rick's professional profile.

Same school

Also attended Harvard Business School1,777

Brad GerstnerFounder & CEO of Altimeter CapitalAileen LeeFounder & Managing Partner of Cowboy VenturesJim BreyerFounder & CEO of Breyer CapitalTim DraperFounder of Draper AssociatesMike Maples JrCo-founding Partner at FloodgateMamoon HamidPartner at Kleiner Perkins

+ 1,771 more

Also attended Massachusetts Institute of Technology849

Fred WilsonCo-founder & Partner at Union Square VenturesAileen LeeFounder & Managing Partner of Cowboy VenturesHemant TanejaCEO & Managing Director of General CatalystBrad FeldCo-founder of Foundry and TechstarsMatt HuangCo-founder and Managing Partner at ParadigmDelian AsparouhovPartner at Founders Fund and co-founder of Varda

+ 843 more

Shared employers

Also worked at Realm.Security, Inc2

Michael McMahonCo-Founder and Partner at Jump CapitalAllison MacLeodVenture Partner at F-Prime Capital Partners

Also worked at Narrative I/O6

Sam ThompsonFounding Partner at Progress VenturesAdriaan Zur MuhlenManaging Partner at Progress VenturesJoe ApprendiGeneral Partner at Revel PartnersVarun SridharPrincipal at Roo CapitalEric del BalsoFounder and General Partner at Kohala VenturesSarah FayManaging Director at Glasswing Ventures

Also worked at Big Brothers Big Sisters of Massachusetts Bay3

Michael MediciManaging Director at Summit PartnersZachary MillerCOO at SV AngelMichael OmenazuInvestor at Visible Hands

Also worked at TrackVia, Inc.2

Brian WallaceManaging Partner at Access Venture PartnersKirk HollandManaging Partner at Access Venture Partners

Deals · 1

LambentBoard seat

via Glasswing Ventures · filed Apr 2026 · $12.5M raise

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

Colleagues at Glasswing Ventures

Ali Mahmoud
Principal at Glasswing Ventures
Ben Cary
Controller and Operations Director at Glasswing Ventures
Brittany Hernandez
Operations Manager at Glasswing Ventures
Carson Ortolani
Analyst at Glasswing Ventures
Ellen Rubin
Partner at Glasswing Ventures
James Massaquoi
Senior Investment Associate at Glasswing Ventures
Jessica Mullins Camburn
Chief Financial Officer at Glasswing Ventures
Kleida Martiro
Managing Director at Glasswing Ventures

Network2

Ali Mahmoud
Principal at Glasswing Ventures
Carson Ortolani
Analyst at Glasswing Ventures

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