QuestMark Partners
Growth equityEllicott City Β· GrowthβLate Stage Β· 2 people tracked
Also known as QUESTMARK MANAGEMENT COMPANY, LLC
Investment thesis
QuestMark is a private investment firm organized in 1998 by Ben, drawing on his background at Alex. Brown & Sons, to invest in emerging growth companies under the same original criteria and objectives it maintains today.
Source: firm website, verified Aug 11, 2026.
Team Β· 2 people
from the firm's website & public directories
What they invest in
from 15 of 48 portfolio companiesSaaS Γ6Hardware Γ5AI & Machine Learning Γ4Healthtech Γ3Marketing Tech Γ3Medical Devices Γ3Consumer Γ2Data & Infrastructure Γ2
HQs:United StatesΓ9
Investments Β· 48 tracked
founders shown can be your intro pathBy year:2022 Β· 12016 Β· 12015 Β· 13 dated
Teladoc Health operates a virtual care platform connecting patients with care providers for medical care, mental health, and chronic disease management services.
Digital HealthHealthtechMental HealthPurchase, US
Dana Mead(Director)Michael King(Executive Officer)Martin Felsenthal(Director)Mark Hirschhorn(Executive Officer)Jason Gorevic(Executive Officer, Director)William Frist(Director)
ADVA, combined with Adtran, provides networking solutions and equipment aimed at helping organizations scale and operate their networks with less complexity.
Data & InfrastructureEnterprise SoftwareHardware
Leading provider of web application vulnerability assessment and compliance solutions.
InsideSales offers Playbooks, a sales engagement platform that gives sales reps AI-driven recommendations on which accounts to contact, when, and how, along with performance analytics for sales leaders.
AI & Machine LearningSaaSSales TechProvo, US
JOSHUA JAMES(Director)KENNETH KROGUE(Executive Officer, Director)DAVID ELKINGTON(Executive Officer, Director)
BoardDAFINA TONCHEVA(Director)MARK GORENBERG(Director)LARS LECKIE(Director)
IntegenX (now part of Thermo Fisher Scientific) offers the Applied Biosystems RapidHIT ID System, an automated forensic DNA analysis instrument that generates STR DNA profiles in about 90 minutes with minimal hands-on time.
BiotechHardwareMedical Devices
KeyMe operates automated kiosks using robotics and machine learning to provide key duplication and locksmith services, complemented by a nationwide network of locksmiths serving consumers and businesses.
AI & Machine LearningConsumerHardwareSaaSHebron, US
Greg Marsh(Founder & President)Gundmundur Hafsteinsson(Director)Christian Hernandez Gallardo(Director)Jens Molbak(Director)
BoardMichael Brown(Director)
Acquired by Motorola Solutions.
GlobeNewswire (operated by Notified) provides press release distribution, media contact databases, and earnings/regulatory filing services aimed at communications, PR, and investor relations teams.
Marketing TechMedia & EntertainmentSaaS
Acquired by Clearlake Capital Group.
Peloton offers connected fitness equipment and a subscription app providing personalized workouts, strength training programs, and community features.
ConsumerSports TechWellness & Fitness
San Francisco, US
Brian Matthews(Director)Bertram Meyer(Director)Cedric Bru(Chief Executive Officer and President)Nathan Medlock(Director)Leo Apotheker(Director)Rene Ho(Chief Financial Officer)
Pleasanton, US
SIMON EDWARDS(Executive Officer)SOPHIE AMES(Executive Officer)FELICIA ALVARO(Director)ELIZABETH CARTER(Executive Officer)DAVID KAHLEY(Executive Officer)CALLIE FIELD(Director)
Cvent Event Diagramming is a collaborative platform for event planning that helps planners and venues design event spaces, manage seating and layouts, and communicate in real-time.
B2B MarketplacesSaaSWashington, US
Brian Matthews(Director)Scott Sehon(Secretary)Trevor Lynn(Director)Ed St. Onge(Director)Dan Berger(Chief Executive Officer)Chris Hemmeter(Director)
Invisalign provides clear dental aligners used by trained orthodontists and dentists to correct teeth alignment.
HealthtechMedical Devices
Vapotherm manufactures high-velocity therapy devices for respiratory distress treatment across patient populations.
HardwareHealthtechMedical DevicesExeter, US
JAMES W. LIKEN(Director)JAMES NEAL ARMSTRONG(Director)JOSEPH ARMY(Executive Officer, Director)MICHAEL J. WARD(Director)ANTHONY ARNERICH(Director)CRAIG B. REYNOLDS(Director)
Vidyo, owned by Enghouse Video, provides secure cloud-based video conferencing and enterprise video management solutions across healthcare, finance, education, government, and other industries.
Cloud ComputingDigital HealthSaaSHackensack, US
Al Schuele(Director)Stephen Lehman(Executive Officer)Timothy L. Krongard(Director)Ofer Shapiro(Director)Ken Sawyer(Director)Eran Westman(Executive Officer, Director)
Cambium Networks provides enterprise Wi-Fi access points and management software for businesses ranging from single small offices to global multi-site networks.
Enterprise SoftwareHardwareIoTThousand Oaks, US
Dirk I. Gates(Executive Officer, Director)Steven M. Krausz(Director)Eric Young(Director)Patrick Parker(Executive Officer)Shane Buckley(Executive Officer, Director)William J. Schroeder(Director)
Exits Β· 2
IPOs and acquisitions across the tracked portfolioAlign TechnologyNASDAQ: ALGNHealthcare AquiredNYSE: TDOC
Portfolio news
latest coverage across their companiesHealthcare Aquired Β· kalkinemedia.com Β· Jul 17, 2026
Vapotherm Β· ad-hoc-news.de Β· Apr 18, 2026
Frequently asked questions
- What stage does QuestMark Partners invest at?
- QuestMark Partners invests at the Growth, Late Stage stages.
- What is QuestMark Partners's typical check size?
- QuestMark Partners typically writes checks of $5M β $15M.
- What sectors does QuestMark Partners focus on?
- QuestMark Partners focuses on Consumer, Cybersecurity, Data & Infrastructure, Enterprise Software, Fintech, Healthtech, Medical Devices, SaaS.
- Where is QuestMark Partners located?
- QuestMark Partners is headquartered in Ellicott City, US.
Similar investors
Khosla Ventures is a venture capital firm known for backing bold, contrarian bets in world-class teams that can reshape entire industries.
Norwest is a venture and growth equity investment firm that has backed over 700 companies across sectors including AI, retail, and healthcare, working alongside entrepreneurs from early to late-stage growth.
Summit Partners is a growth investing firm that backs category-leading companies across technology, healthcare and life sciences, and growth products and services, providing capital and resources to support their expansion.
Venrock is a venture capital firm investing across technology and healthcare, backing companies in fintech, developer infrastructure, life sciences, therapeutics, semiconductors, and consumer products.
ACT Venture Capital is an independent Irish venture capital firm that invests β¬1 million to β¬15 million in growth-stage private companies, with capacity for larger commitments through syndicated rounds.