ClearSky
Venture capitalActively deployingWest Palm Beach · Seed–Growth · 15 people tracked
Also known as CLEARSKY ADVISORS LLC · ClearSky International · Clearsky Power Technology · ClearSky Security
Investment thesis
ClearSky backs innovative companies in cybersecurity and energy transition, aiming to improve the safety of the digital landscape and support the global ecosystem. The firm emphasizes its core investment team's combined experience of over a century, having worked together for more than a decade and built deep sector-specific and financial expertise. It leverages an extensive network of founders, CEOs, VCs, and advisors to inform fund strategy and due diligence, seeking sustainable solutions for the planet alongside portfolio returns.
Source: firm website, verified Aug 3, 2026.
Team · 15 people
from the firm's websiteWhat they invest in
from 22 of 71 portfolio companiesCybersecurity ×10Energy ×8Enterprise Software ×7AI & Machine Learning ×6Cloud Computing ×3SaaS ×3Data & Infrastructure ×2Developer Tools ×2
HQs:United States×23Israel×1
Investments · 71 tracked
founders shown can be your intro pathDenver, US
Frederick H. Kneip(Chief Executive Officer)Jay Leek(Director)Robert R. Ackerman, Jr.(Director)Anthony J Urbanovich(Chief Operating Officer)Stuart McClure(Director)Alexander Weiss(Director)
Board seatJay Leek· per SEC Form D · $20M raise · filed Apr 2017
Tenable One Cloud Exposure is a cloud-native application protection platform (CNAPP) that identifies and reduces cloud risk by addressing misconfigurations, risky entitlements, and vulnerabilities across multi-cloud and hybrid environments.
Cloud ComputingCybersecurityEnterprise Software
EnergyPittsburgh, US
John Connolly(Executive Officer)Ray Lane(Director)Jay Whitacre(Executive Officer, Director)Bill Wiberg(Director)Thomas R. McDaniel(Director)Scott A. Pearson(Executive Officer, Director)
Arctic Wolf provides managed detection and response (MDR) services with 24x7 security teams that detect, investigate, and respond to threats using an open XDR platform processing trillions of events weekly.
AI & Machine LearningCybersecurityEnterprise SoftwareSaaS
Brian NeSmith(Founder & CEO)
Beacon AI builds an AI assistant for commercial and private aircraft to support pilots with checklist management, flight procedures, route optimization, and safety calculations.
AI & Machine Learning
BigID is a data security platform that discovers, classifies, and governs enterprise data across cloud, SaaS, and unstructured environments to enable privacy, security, and compliance.
CybersecurityData & InfrastructureEnterprise SoftwareMamaroneck, US
Gil Beyda(Director)Nimrod Vax(Secretary, Director)Dimitri Sirota(President, Treasurer, Chief Executive Officer, Director)
BoardEd Sim(Director)
Sophos provides cloud security software for multi-cloud environments, protecting workloads, identities, networks, and applications through extended detection and response (XDR), managed detection and response (MDR), and identity threat detection and response (ITDR) across AWS, Azure, GCP, and OCI platforms.
Cloud ComputingCybersecurityEnterprise Software
Sunnyvale, US
Suresh Batchu(Director)Balaji Parimi(Executive Officer, Director)Jay Leek(Director)
Demisto provides automation solutions for security operations centers (SOCs) to streamline incident response workflows by reducing alert noise, automating repetitive tasks, and enabling analyst collaboration.
CybersecurityEnterprise SoftwareSaaSCupertino, US
Jay Leek(Director)Rishi Bhargava(Executive Officer, Director)Slavik Markovich(Executive Officer, Director)
BoardJake Flomenberg(Director)
Orlando, US
Peter Kassabov(Executive Officer, Promoter)Edward Alexander Santos(Executive Officer, Promoter)
EnergyRockville, US
Kevin Reid(Director)John Jung(Executive Officer, Director)Jim Murphy(Executive Officer)Raymond Spencer(Director)William Pruitt(Director)Rodney Rogers(Director)
College Park, US
Peter Kuper(Director)Christopher Hjelm(Director)James Bandanza(Director)Simon Smith(Executive Officer, Director)David Baggett(Executive Officer, Director, Promoter)
Herzeliya
Richard Bengino(Executive Officer)David Blumberg(Director)Kobi Samboursky(Director)Alon Arvatz(Executive Officer, Director, Promoter)Jay Leek(Director)Amir Hozez(Executive Officer)
End-to-end LLM security platform providing comprehensive protection from LLM-based cyber-attacks and data leakage.
Mainspring Energy develops power generation systems.
Deep TechEnergyHardware
BoardTom Linebarger(Chairman & Chief Executive Officer)
Mitiga provides cloud incident response and breach prevention software using AI-driven detection and forensic analysis for enterprises.
AI & Machine LearningCloud ComputingCybersecurity
Advanced ManufacturingPhoenix, US
Joseph R. Pike(Executive Officer)Gerrit A. Marx(Director)Jeffrey W. Ubben(Director)Michael L. Mansuetti(Director)Pablo Koziner(Executive Officer)Britton M. Worthen(Executive Officer)
Auburn, US
DAVID GRIEST(Director)GLEN J. BERTINI(Executive Officer, Director)BROOKE WADE(Director)PIERRE FESTAL(Director)ALLAN O'BRYANT(Director)DAVID L. LEWIS(Executive Officer, Director)
San Francisco, US
Roman Blachman(Executive Officer, Director)Steve Herrod(Director)Ajit Sancheti(Executive Officer, Director)
ProcessUnity provides a third-party risk management platform that enables risk and compliance teams to monitor vendor compliance, manage risk assessments, and respond to audit requests.
AI & Machine LearningCybersecurityEnterprise SoftwareLegalTechSaaSConcord, US
PAUL FERGUSON(Director)TODD A. STONE(Executive Officer, Director)MICHAEL COLLEARY(Director)JAMES SCOTT CURVEY(Director)ANDREW SHIELDS(Director)
Denver, US
Jay Leek(Director)Gene Stevens(Executive Officer, Director)Larry Orr(Director)Scott Chasin(Executive Officer, Director)Matt Bigge(Director)Sheila Gulati(Director)
Query provides a security data mesh platform that integrates security data from 50+ distributed sources without requiring data migration or ingestion, enabling AI-driven threat detection and investigation across SIEMs, data lakes, and other security tools.
AI & Machine LearningCybersecurityData & InfrastructureBrookings, US
Jay Leek(Director)Dhiraj Sharan(Executive Officer, Director)Andrew Maloney(Executive Officer, Director)
Fall River, US
David Pignolet(President)Zackary King King(Director)
BoardJay Leek(Director)Art Coviello(Director)
Skout is a social platform operated by The Meet Group, Inc.
MarketplacesSocialNew Hope, US
Nicholas Hermansader(Managing Director)
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.
Frequently asked questions
- What stage does ClearSky invest at?
- ClearSky invests at the Seed, Series A, Series B, Series C, Growth stages.
- What sectors does ClearSky focus on?
- ClearSky focuses on Cleantech, Climate Tech, Cybersecurity, Energy.
- Where is ClearSky located?
- ClearSky is headquartered in West Palm Beach, US.
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