Harpoon Ventures
Venture capitalActively deployingSan Diego · Pre-Seed–Series B · 13 people tracked
Also known as HARPOON MANAGEMENT, LLC
Investment thesis
Harpoon backs bold founders working to advance American innovation and national strategic advantage. It invests in AI, deep tech, software infrastructure, and cybersecurity, viewing these areas as essential to restoring U.S. technological leadership. The firm emphasizes hands-on support beyond capital, particularly helping portfolio companies win U.S. government and defense contracts—from non-dilutive grants to programs of record exceeding $100M. Founded on the belief that technology will define geopolitics, Harpoon positions itself as a tactical advantage for founders, leveraging deep connectivity across the defense ecosystem, including special operations and military branches, to open doors and facilitate government customer relationships.
Source: firm website, verified Aug 3, 2026.
Team · 13 people
from the firm's website & public directories
What they invest in
from 18 of 59 portfolio companiesAI & Machine Learning ×6Advanced Manufacturing ×5Data & Infrastructure ×5Deep Tech ×5Hardware ×5Climate Tech ×4Cloud Computing ×4Cybersecurity ×4
HQs:United States×12United Kingdom×1
Investments · 59 tracked
founders shown can be your intro pathDraper, US
Ben Lambert(Director)Andrew Yakulis(Executive Officer, Director)George Matus(Director)Larson Jensen(Director)
Board seatLarsen Jensen· per SEC Form D · $13M raise · filed Oct 2025
Aalo develops advanced nuclear reactor technology aimed at producing electricity at under 3 cents per kilowatt-hour.
Climate TechDeep TechEnergyHardware
Decodable is a fully-managed, serverless platform for real-time data integration, ETL/ELT, and stream processing built on Apache Flink and Debezium.
AI & Machine LearningData & InfrastructureSaaSWalnut, US
Eric Sammer(Executive Officer, Director)Ethan Batraski(Director)
Deep learning AI platform for computer vision, natural language processing, and data labeling.
eFlow extracts lithium from dilute brines in North America using direct lithium extraction technology, serving the clean energy and electric vehicle supply chain.
CleantechEnergyNew Materials
Eric McShane(CEO and co-founder)Evan Gardner(CTO and co-founder)
Encord provides a data platform for developing and deploying multimodal AI systems, serving AI development teams at scale across training and production environments.
AI & Machine LearningData & InfrastructureEnterprise SoftwareRoboticsLondon, GB
Ulrik Stig Hansen(Co-Founder & President)inEric Landau(Founder)in
Defense ecosystem company with special operations connections
San Diego, US
Daniel Magy(Executive Officer, Director, Promoter)Ian Muceus(Executive Officer, Director, Promoter)
BoardTommy Hendrix(Director)Aaron Jacobson(Director)
Halen Mattison(Cofounder)Luke Neise(Cofounder)
JITX develops software to automate hardware and circuit board design for electronics companies.
Advanced ManufacturingAI & Machine LearningDeep TechDeveloper ToolsHardwareRoboticsSan Francisco, US
Duncan Haldane(Founder/CEO)inJonathan Bachrach(Founder/Creative Director)inPatrick Napa(Co-founder)
Defense robotics company working on Army projects
Defense technology company providing near-term value to the DoD
n8n is a visual and code-based workflow automation platform that enables technical teams to build, connect, and deploy AI agents and integrations with flexible deployment options ranging from on-premise to cloud infrastructure.
AI & Machine LearningDeveloper ToolsEnterprise Software
Jan Oberhauser(Founder & CEO)in
Vectra AI provides real-time network observability and threat detection across hybrid environments spanning on-premises, multi-cloud, SaaS, edge, and IoT/OT systems.
Cloud ComputingCybersecurityData & InfrastructureIoT
Faction is a venture capital firm that invests in cryptocurrency and blockchain projects at the seed and series A stages, focusing on entrepreneurs building fundamental utility across the technology stack.
Crypto & Web3
Gal Barnea(Executive Officer)Christina Calvaneso(Executive Officer)Brian Pozesky(Executive Officer)Menashe Ezra(Director)Erez Shachar(Director)Tal Riesenfeld(Director)
Orbital Ops develops propulsion systems and related aerospace hardware for airborne vehicles.
Advanced ManufacturingDeep TechDefense TechHardwareSpace TechLos Angeles, US
Ben Schleuniger(Founder)inRoss Doherty(Co-Founder & COO)inHunter
The compliance firewall for AI.
Kojin Oshiba(Cofounder)
Code scanning platform for finding security vulnerabilities.
Solugen develops a biomanufacturing platform using fermentation and bioprocessing technology to produce specialty chemicals at scale.
Advanced ManufacturingBiotechCleantechClimate TechHealthtechHouston, US
Sean Hunt(Founder/CTO)inGaurab Chakrabarti(Founder)in
BoardSeth Bannon(Director)
Starcloud designs and deploys data centers in space to support hyperscale computing workloads, leveraging continuous solar energy and radiative cooling for gigawatt-scale AI training clusters.
Advanced ManufacturingAI & Machine LearningClimate TechCloud ComputingDeep TechSpace TechSeattle, US
Philip Johnston(Founder/CEO)inEzra Feilden(Founder)inAdi Oltean(Founder)in
Monad is a security data pipeline platform that normalizes, filters, enriches, and routes security telemetry from any source to optimize SIEM costs and reduce alert noise for security teams.
CybersecurityData & InfrastructureEnterprise SoftwareSaaSNew York City, US
Sunny Rekhi(Founder)in
Truffle Security develops TruffleHog, an open-source secrets scanning tool that identifies and remediates exposed credentials such as encryption keys in cloud and SaaS environments before exploitation.
CybersecurityDeveloper Tools
Dylan Ayrey(Founder & CEO)in
Ursa Major develops flight-proven aerospace and defense systems, including hypersonic engines, solid rocket motors, and space mobility solutions for military and defense applications.
Defense TechHardwareSpace TechBerthoud, US
Dan Jablonsky(CEO)Joe Laurienti(Founder)
Defense company built for speed, scale, and mission-first execution
Open-source intelligence on corporate ownership and supply chains in China.
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 Harpoon Ventures invest at?
- Harpoon Ventures invests at the Pre-Seed, Seed, Series A, Series B stages.
- What is Harpoon Ventures's typical check size?
- Harpoon Ventures typically writes checks of $100K – $5M.
- What sectors does Harpoon Ventures focus on?
- Harpoon Ventures focuses on AI & Machine Learning, Cybersecurity, Data & Infrastructure, Deep Tech, Defense Tech, Developer Tools, SaaS.
- Where is Harpoon Ventures located?
- Harpoon Ventures is headquartered in San Diego, US.
- Does Harpoon Ventures lead rounds?
- Yes, Harpoon Ventures leads investment rounds.
From the blog
visit blog ↗Harpoon Ventures recently announced its $155 million Fund IV focused on critical technologies bridging commercial and government markets across compute, energy, aerospace, and biosecurity. The firm has invested in Astranis for low-cost satellite connectivity and General Galactic for carbon-neutral synthetic methane production, exemplifying its strategy of backing technologies addressing foundational infrastructure and national security challenges. AI summary
Media · Podcasts & interviews
featuring the teamThe Warrior Ethos & America's Mission, Interview with Harpoon Ventures Founder Larsen Jensen | Triggered Ep275
Larsen · rumble.com
Investing in the Freedom Stack with Larsen Jensen of Harpoon Ventures
Fresh Brewed Tech · Larsen
Making America Mission Ready, Interview with Harpoon Ventures founder Larsen Jensen | Ep246
Larsen · rumble.com
97. Larsen Jensen, Founder and General Partner, Harpoon Ventures
Second Front Systems · Larsen
Episode 5: Larsen Jensen, Founder at Harpoon Ventures
Dave Nolan · Larsen
Welcome to a Harpoon Ventures live webinar!
Harpoon Ventures
Images
Co-investors · 16
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▶4 more co-investors
GreatPoint VenturesSorenson VenturesBain Capital CryptoUpWest Labs
Firms observed investing alongside Harpoon Ventures, from public investor directories. Shared companies are the overlap with Harpoon Ventures's recorded portfolio.
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