Harpoon

Harpoon Ventures operates inside one of the fastest-growing fault lines in venture capital: the collision between frontier technology and national strategy. The San Diego-based firm invests across AI, aerospace, defense, robotics, cybersecurity, energy, and industrial infrastructure, focusing primarily on pre-seed through Series A startups building foundational systems instead of convenience software. The firm was founded in 2018 by Larsen Jensen, whose background reads less like traditional venture capital and more like a stress test for modern leadership mythology. Olympic medalist. American record holder. U.S. Navy SEAL. Goldman Sachs investor. Andreessen Horowitz. Lightspeed Venture Partners. Then Harpoon Ventures. Silicon Valley usually manufactures confidence through proximity. Larsen Jensen built it through pressure.

Harpoon Ventures now manages roughly $300M across 3 funds and has emerged as a meaningful player in the expanding dual-use technology ecosystem. The firm’s investment thesis centers around what it calls the “Freedom Stack,” a framework built around technologies that shape both economic leverage and geopolitical influence. That matters because venture capital is changing shape in real time. The old software-only playbook is colliding with a new industrial cycle driven by AI infrastructure, autonomous systems, energy resilience, advanced manufacturing, and defense modernization. Harpoon Ventures sits directly inside that transition.

About Harpoon Ventures

Harpoon Ventures does not behave like a traditional Sand Hill Road venture firm chasing lightweight software arbitrage and social engagement metrics disguised as “community.” The portfolio points somewhere else entirely. Satellites. Autonomous flight systems. AI chips. Propulsion systems. Industrial robotics. Cybersecurity infrastructure. The kind of companies that sound expensive because they are. The firm is headquartered in San Diego with an additional presence in New York. That geographic positioning matters more than people realize. San Diego has quietly become one of the most important defense-tech and autonomy corridors in the United States, sitting at the intersection of military infrastructure, aerospace talent, robotics research, and venture capital.

Harpoon’s thesis reflects a broader market reality now becoming impossible to ignore: geopolitical competition increasingly looks like technological competition wearing a different outfit. That shift has dragged venture capital into sectors many firms previously avoided because they were operationally difficult, politically sensitive, or required actual technical depth instead of slide-deck theater.

Investment Philosophy

Harpoon Ventures organizes its investment strategy around what it calls the “Freedom Stack.” The phrase sounds cinematic, but the underlying thesis is brutally practical. The firm invests across 7 primary categories: AI and compute infrastructure, aerospace and defense systems, cybersecurity and network resilience, robotics and advanced manufacturing, energy and materials science, biotech and biosecurity, and software infrastructure supporting national-scale systems.

Harpoon Ventures focuses primarily on pre-seed, seed, and Series A startups, often investing before broad commercial validation exists. That is a meaningful distinction in the current market environment. Many venture firms claim conviction investing. Harpoon’s version involves underwriting technical risk before customer traction becomes obvious. That approach requires a different type of investor. Engineers can spot engineering. Operators can spot operational resilience. Military veterans can usually identify whether a founder folds under pressure in about 12 minutes. Harpoon’s internal composition reflects that reality.

Leadership and Partners

Larsen Jensen remains the defining figure behind Harpoon Ventures, but the broader team reinforces the firm’s operational identity. Jeff Torrance, Managing Partner, oversees financial operations, fund strategy, and internal execution. Riley Loftus focuses on frontier technology investments spanning AI infrastructure, energy systems, and aerospace technologies. Andrew Couillard leads Black Flag, Harpoon’s accelerator initiative for mission-critical technology startups. Clint Brown contributes deep policy and government experience following years working in the U.S. Senate.

The composition of the team matters because Harpoon Ventures increasingly operates less like a conventional venture capital office and more like a strategic bridge between Silicon Valley engineering culture and federal infrastructure priorities. That bridge has become increasingly valuable. Washington wants innovation velocity. Startups want procurement access. Venture firms want asymmetric outcomes. Harpoon positioned itself directly inside that triangle before much of the market fully recognized where the cycle was heading.

Portfolio and Ecosystem Positioning

The Harpoon Ventures portfolio reads like a map of strategic infrastructure markets likely to dominate the next decade. Astranis builds dedicated communications satellites. Ursa Major develops advanced propulsion systems. Kodiak focuses on autonomous freight transportation. MatX develops high-throughput chips for large language model infrastructure. Semgrep operates inside application security. Solugen focuses on industrial chemical production. Firestorm Labs builds modular unmanned aerial systems. Different sectors. Same underlying pattern. These are companies building systems the market cannot simply meme into existence.

Harpoon Ventures has also helped portfolio companies secure more than $1B in government contracts. That number changes the conversation because it reflects more than venture optimism. It signals procurement alignment, regulatory navigation capability, and institutional trust. The venture market increasingly rewards firms capable of helping startups navigate public-sector complexity without suffocating commercial velocity. That capability gap is becoming a competitive advantage. The Black Flag accelerator further reinforces Harpoon’s positioning. The initiative focuses on startups operating in aerospace, defense, robotics, AI, energy, and critical infrastructure sectors. The program connects founders with operational expertise, government ecosystem access, and strategic infrastructure support that traditional accelerators often cannot provide.

Why Founders Pay Attention

Founders building frontier technologies face a different operating environment than traditional SaaS startups. Hardware cycles are longer. Regulatory complexity increases. Government procurement moves slowly until it suddenly moves very fast. Infrastructure businesses require patience, capital discipline, and psychological endurance. The founders entering these sectors are often less interested in internet applause and more interested in solving difficult physical-world constraints. Harpoon Ventures appears calibrated specifically for that founder profile.

The firm’s hiring momentum across portfolio companies also signals where venture conviction is concentrating. Engineers, AI researchers, aerospace specialists, cybersecurity operators, industrial systems architects, and robotics talent remain in extremely high demand across the Harpoon ecosystem. That hiring activity reflects a larger market shift: venture capital is rotating back toward companies building hard infrastructure, strategic systems, and operational technology with long-term geopolitical significance. The software-only era did not disappear. It simply stopped being the entire story.

What This Signals for Venture Capital

Harpoon Ventures represents a broader transformation unfolding across venture capital markets. For years, large portions of the startup ecosystem optimized for lightweight scalability. Cheap capital rewarded speed, abstraction, and customer acquisition efficiency. Infrastructure complexity often looked unattractive compared to SaaS margins. AI acceleration changed that equation.

Suddenly compute infrastructure matters. Energy infrastructure matters. Semiconductor supply chains matter. Autonomous systems matter. National security matters. Manufacturing resilience matters. Defense modernization matters. The market rediscovered physics. That shift has created new demand for venture firms capable of understanding technically difficult industries while navigating institutional systems that extend far beyond Silicon Valley. Harpoon Ventures sits directly inside that emerging category. The firm’s rise also reflects another uncomfortable market reality: governments globally are becoming active participants in technology competition again. Venture capital can no longer operate as though geopolitics exists somewhere offstage behind the quarterly returns spreadsheet. Technology is infrastructure now. Infrastructure eventually becomes strategy.