Harpoon Ventures
UnclaimedAt a Glance
- Check Size
- $100K – $5M
- Stage
- Pre-Seed, Seed, Series A
- AUM
- $300M
- Sectors
- AI, Cybersecurity, Aerospace & Defense
- Founded
- 2018
- HQ
- San Diego, CA
About Harpoon Ventures
Harpoon Ventures is a venture capital firm based in Washington, DC founded in 2018.
Founded in 2018 by a two-time Olympic medalist and former Navy SEAL, Harpoon was built on a simple belief: technology will define geopolitics.Our first backers, a16z and Lightspeed, bet on our vision. Today, we’re anchored by the nation’s top pensions and endowments, including a leading first responder pension fund.We’ve worked side-by-side with our founders to secure over $1B in U.S. government contracts, spanning non-dilutive grants to $100M+ programs of record.At Harpoon, we’re more than investors - we’re your tactical advantage.Our team is uniquely positioned to identify and nurture the technologies that matter most to America’s strategic interests.
The firm focuses on Pre-Seed, Seed, Series A investments across sectors including AI, Cybersecurity, Aerospace & Defense.
Investment Thesis
“Early-stage investor focused on national security technologies and dual-use applications.”
Sector Focus
Investment Stage
Notable Portfolio Companies
Fund History
Harpoon has raised four funds and now reports roughly $300 million under management. Fund II filed a $30 million offering in May 2019, raised the target to $55 million and had sold $45.2 million by July 2020, with Larsen Jensen and William Allen named. Fund III filed at $100 million in February 2021 and closed at $122.0 million, fully sold, four months later. Fund IV filed a $225 million offering in December 2022 and reported $124.2 million sold by December 2023; a second Fund IV entity filed a $140 million offering in February 2026, alongside a Fund IV-A sidecar and a 2026-1 co-investment vehicle.
The filings are made from Coronado and San Diego, California. The capital backs national security and dual-use technology at pre-seed through Series A, and the firm says it has helped portfolio companies secure more than $1 billion in US government contracts, from non-dilutive grants to programs of record above $100 million. Current holdings include MatX, Astranis, Solugen, Merlin Labs, Firestorm Labs, CHAOS Industries, Ursa Major and Aalo Atomics.
SEC Fund Filings
- Vehicles filed, last 24 months
- 3
- Latest filing
Harpoon Ventures filed a Form D for 3 fund vehicles between Sep 26, 2024 and Sep 25, 2026.
| Fund vehicle | Source |
|---|---|
| Harpoon Ventures 2026-3, LLC | SEC Form D, filed |
| Harpoon Ventures 2026-1, LLC | SEC Form D, filed |
| Harpoon Ventures Fund IV, L.P. | SEC Form D, filed |
A Form D is the notice a fund files with the SEC when it raises money in a private offering. Feeder funds, parallel funds and SPVs each file their own, so the count measures filing activity, not the number of flagship funds.
Source: SEC EDGAR Form D filings for pooled investment funds, original filings only (amendments excluded). Our filing data starts Jul 1, 2024. Vehicles are matched to Harpoon Ventures by fund name and checked against the sponsor address and named principals on each filing; offering amounts are not shown. Each “SEC Form D” link opens an EDGAR full-text search for that vehicle’s exact name, where the filing itself is listed. See every new fund filing on the Form D Radar.
Team (2)
Frequently Asked Questions
What stage does Harpoon Ventures invest at?
Harpoon Ventures primarily invests at the Pre-Seed, Seed, Series A stages. This means they focus on companies that are at the earliest idea or prototype phase.
Where is Harpoon Ventures located?
Harpoon Ventures is headquartered in San Diego, CA. Many of their portfolio companies are also based in this region, though they invest across geographies.
What sectors does Harpoon Ventures focus on?
Harpoon Ventures focuses on investments in AI, Cybersecurity, Aerospace & Defense. Their portfolio reflects deep expertise and networks within these sectors.
What is Harpoon Ventures's typical check size?
Harpoon Ventures's typical investment check size ranges from $100K to $5M. Actual amounts may vary based on the stage, sector, and specific opportunity.
How much does Harpoon Ventures have under management?
Harpoon Ventures manages approximately $300M in assets under management (AUM) across their funds.
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