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Harpoon Ventures Raises $155M Fourth Fund as Defense Tech Goes Mainstream - Business San Diego

Reported by Businessofsandiego
Jul 1, 2026· 2 min read
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Key Takeaways
  • • Harpoon Ventures closed an oversubscribed $155 million Fund IV, bringing the firm's total assets under management to approximately $450 million since its 2018 founding.
  • • The San Diego-based venture firm is led by General Partner Larsen Jensen, an Olympic medalist and former Navy SEAL, with CFO Jeff Torrance and investor Jacob Windle in key leadership roles.
  • • Fund IV will deploy capital across emerging defense and critical technology startups including Vector, Alta Ares, Merlin, Ursa Major, Firestorm, Kodiak Robotics, Ulysses, and Aalo Atomics, targeting AI, autonomy, advanced manufacturing, and next-generation military systems.
  • • The raise reflects accelerating institutional and family office appetite for defense-focused venture investing, with Harpoon noting that venture capital deployment into this sector continues to grow amid heightened national security priorities.
  • • Jensen's observation that few venture capitalists attended defense conferences at Harpoon's inception underscores how the sector has transitioned from niche to mainstream institutional investment focus.
Summary
Harpoon Ventures has successfully closed Fund IV at $155 million, an oversubscribed raise that positions the San Diego-based venture capital firm as a significant player in the expanding defense and critical technology investment space. The new fund brings Harpoon's cumulative assets under management to nearly $450 million, marking substantial growth since the firm's 2018 inception, when it deployed just $3 million across its first fund.

The firm's leadership structure includes General Partner Larsen Jensen, whose background as an Olympic medalist and former Navy SEAL lends credibility within both the entrepreneurial and defense communities. CFO Jeff Torrance and investor Jacob Windle complete the core management team. Institutional investors, family offices, and strategic partners provided the capital for Fund IV, though the firm did not name specific limited partners in the announcement.

Fund IV will target early-stage companies building solutions across defense and critical infrastructure domains. Portfolio companies receiving support include Vector, Alta Ares, Merlin, Ursa Major, Firestorm, Kodiak Robotics, Ulysses, and Aalo Atomics. These investments reflect Harpoon's thesis that emerging technologies—particularly artificial intelligence, autonomous systems, advanced manufacturing capabilities, and next-generation military platforms—represent both commercial and government market opportunities with substantial growth potential.

Jensen remarked that when Harpoon began operations, venture capitalists and startup founders were conspicuously absent from defense and government-focused conferences in Washington, D.C. This observation underscores a marked shift in capital allocation dynamics: defense technology has evolved from a specialized niche to a mainstream institutional investment category. The closing of an oversubscribed fourth fund in this space validates that institutional capital—including family offices and strategic investors—now views defense innovation as strategically important to national competitiveness and Allied security interests.

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Businessofsandiego Harpoon Ventures Raises $155M Fourth Fund as Defense Tech Goes Mainstream - Business San Diego