What sectors does Sum Ventures focus on?

Sum Ventures focuses on AI & Machine Learning, Climate Tech, Fintech, Healthtech, PropTech.

Does Sum Ventures lead rounds?

Sum Ventures typically participates in rounds rather than leading them.

Sum Ventures

13 people tracked

★ Follow + Add to CRM ⤳ Find an introduction

Find your way into Sum Ventures

420 people in our graph share verified history with the Sum Ventures team — schools, employers, funds. One of them is your warm intro.

Magnus Bergmanunlockedknows Derek Hu · together at icon medialab (overlapped)

×6knows the team · via A.T. Kearney

knows the team · via New Jersey Institute of Technology

×2knows the team · via Loyola High School of Los Angeles

×2knows the team · via Pepperdine University

✨ Fox Verdict

Investment thesis

First-check investor whose partners serve as board and C-level executives, leverages Siemens and Douglas Elliman ties to structure partnerships unlocking non-dilutive and follow-on funding; portfolio 40% women, 50% immigrants.

Invests inAI & Machine Learning Climate Tech Fintech Healthtech PropTech

Leads rounds

Follows

Last 12 months

1 investment

Tracked investments

Team · 13 people

from public directories

Brent Celek· Partner

Former NFL tight end Brent Celek built and ran a real estate platform, bringing P&L experience and Ponzi-informed, risk-aware diligence while bridging athletes and tech with 15+ years in sports.

Brian Stephenson· Partner

Brian Stephenson is a hands-on operator-turned-investor who partners with pre-seed and seed sustainability and climate tech founders, offering strategic, operational guidance to navigate early growth milestones.

Derek Hu· Partner· New York, New York, United Statesin

Derek Hu is a venture partner and managing partner of a multi‑asset family fund, offering VC and family‑office perspectives, fluent in Chinese and serving on the New York Philharmonic board.

Elizabeth Spears· General Partner

Elizabeth Spears is a Managing Partner and active founder running Tensa Sports, bringing current hands-on startup leadership and deep productization experience translating complex, first-of-their-kind technical innovations into usable products.

Garrett Gilbertson· Managing Partner· Hermosa Beach, California, United Statesin

Garrett Gilbertson is a decorated Afghan War veteran whose military leadership—from Kabul to Caltech—drives a hands-on approach to early-stage startups while running his VC and chairing a top angel network.

Harry Hopper· Senior Partner

Harry Hopper is a founder-turned-manager and Forbes Midas-listed specialist in communications, media and mobile/wireless infrastructure who scaled a franchise across four funds (>$2B) while heading an affiliate investment bank.

Raj Khoshoo· Senior Partner· Irvine, California, United Statesin

Raj Khoshoo is a former Siemens dealmaker who built a front-loaded, systems-driven M&A practice with zero failed deals, won Siemens Top Innovator, and brings buyer-side expertise to founders.

Chris Sporck· Venture Partner

Chris Sporck, a battery-management and power-conversion domain expert with 20+ patents, leads 40+ engineers as Director of Battery Management and brings hands-on technical expertise to electrification and hardware climate-tech founders.

Margot Shapiro· Venture Partner

Margot Shapiro blends a healthcare background with early-stage focus at the intersection of better-for-you CPG, wellness and women's health, offering hands-on guidance on funding readiness and investor expectations.

Nachi Gupta· Venture Partner

Nachi Gupta is an active emergency physician and senior biotech leader bringing practitioner-level healthcare insight and hands-on gene therapy platform experience from serving as Chief Innovation Officer at Kriya Therapeutics.

Peter Jun· Venture Partner

Peter Jun is a strategic operator-investor with cross-industry strategy experience across real estate, retail, financial services, defense, entertainment and healthcare, connecting U.S. venture insights to international, especially Korean, audiences.

Rick Lu· Venture Partner

Rick Lu is a defense‑tech investor and founder of acquired RF/electronic‑warfare startups, a MOSA architect, and Band of Angels Defense chair/Pacific Defense CSO who guides founders through SBIRs and contracting.

Tammo Mueller· Venture Partner

Tammo Mueller, a technical founder who co-founded oneQube and Quantiva, applies AI/ML to healthcare and martech decision systems and remains actively embedded as CTO of UNest with a quantitative approach.

What they invest in

from 3 of 3 portfolio companies

AgTech ×1Digital Health ×1Fintech ×1Future of Work ×1Hardware ×1Healthtech ×1IoT ×1SaaS ×1

HQs:United States×3

Investments · 3 tracked

founders shown can be your intro path

By year:2026 · 1 2025 · 1 2022 · 13 dated

Grapefruitgrapefruit.health inAug 2022

Grapefruit Health provides healthcare organizations with a workforce of trained clinical students—recruited from pre-med, nursing, pharmacy, social work, and similar programs—who are integrated into care team workflows to close care gaps and address staffing shortages.

Digital HealthFuture of WorkHealthtechSaaSChicago, US

Eric Alvarez(Executive Officer, Director)in

Co-investorsEverywhere Ventures GoAhead Ventures LongJump Ventures Antler Hustle Fund

Irrigreenirrigreen.com in 𝕏Apr 2025 · $19M

Irrigreen manufactures smart in-ground sprinkler systems for residential lawns that use mapping technology to reduce water waste by up to 50% compared to traditional irrigation.

AgTechHardwareIoT

Co-investorsBURNT ISLAND VENTURES Echo River Capital MFV Partners Sand Hill Angels Tamiami Angel Ulu Ventures +1 more

Transparency Analyticstransparency-analytics.com inJan 2026

Transparency Analytics provides quantitatively driven credit ratings for corporate issuers and private credit transactions.

FintechNew York, US

Christopher Tolles(CFO)Michael Brawer(CEO)inRobert Boresta(Executive Officer)

BoardMichael Fedorochko(Director)Christopher Gottschalk(Director)in

Co-investorsCore Venture Capital Deciens Mouro Capital Allianz Life Ventures Core Innovation Capital FJ Labs

Portfolio news

latest coverage across their companies

Transparency Analytics Secures Second Funding Round to Transform Private Credit Ratings | The Fintech Times

Transparency Analytics · thefintechtimes.com · Jan 5, 2026

The Beat: Grapefruit Health raises seed funding after business pivot - Chicago Business Journal

Grapefruit · bizjournals.com · Aug 20, 2025

Irrigreen Secures $19M Series A to Lead the Future of Smart Lawn Care

Irrigreen · prnewswire.com · Apr 22, 2025

Frequently asked questions

What sectors does Sum Ventures focus on?: Sum Ventures focuses on AI & Machine Learning, Climate Tech, Fintech, Healthtech, PropTech.
Does Sum Ventures lead rounds?: Sum Ventures typically participates in rounds rather than leading them.

Images

Similar investors

Daphni

Daphni is a venture capital firm investing in early-stage European startups across multiple sectors. The firm focuses on companies with European origins that pursue international growth opportunities.

$540K – $6.5M

Draft Ventures Llc

Draft Ventures is a venture fund and venture studio that invests in, incubates, and advises early-stage companies, founded by Artia Moghbel and David Rodriguez.

Rethink Education

Rethink Education is a venture capital firm backing early-stage founders building companies that expand access to opportunity and economic mobility across education, workforce, health equity, and financial inclusion.

Inertia Ventures

Inertia Ventures is a New York-based venture capital fund that focuses specifically on disrupting large, slow-moving industries like real estate, finance, insurance, and logistics through B2B AI/ML software, rather than being a generalist fund. Despite being a small, early-stage firm founded around 2020-2021, Inertia has built an unusually strong portfolio of unicorn companies including Betterment, Carta, DocuSign, and Pacaso by taking a hands-on, finance-heavy approach to evaluating startups' unit economics and go-to-market strategies.

$2M

Kintetsu Venture Partners

Kintetsu Venture Partners is the corporate venture arm of Japan's Kintetsu Group, promoting co-creation between startups and the group across transportation, travel/leisure, retail/dining, hotels, real estate, and advertising/information services.