Larsen Jensen

General Partner, Harpoon Ventures
Larsen Jensen, a two-time Olympic medalist and former Navy SEAL, hands-on helps commercial infrastructure, security, and AI companies win government contracts—his portfolio has closed roughly $500M in such deals.
How to contact Larsen Jensen
Stages their fund invests in
N/A
Avg Check
$100K - $5M
N/A
Does their fund Lead?
Yes
N/A
Geos their fund invests in
USA
Larsen Jensen
Stages their fund invests in
N/A
Sectors their fund invests in
Defense
Deeptech / Hardware
Energy
Climate
Cybersecurity
Materials
AI
Chips
Biotech
Robotics
N/A
Avg Check
$100K - $5M
N/A
Leads?
Yes
N/A
Close X
Industries
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Info out of date? Let us know

About Larsen Jensen

Larsen Jensen is a two-time Olympic medalist and former Navy SEAL who now runs Harpoon Ventures, where he helps commercial infrastructure, security, and AI companies expand into government markets—his portfolio companies have closed roughly $500 million in government deals. He built Harpoon around the early thesis that AI and deep tech would have "space-race-level" national security impact, positioning the firm as a hands-on partner that actively helps founders navigate government contracting rather than just providing capital.

Larsen Jensen's Interests

What they've been talking about across their social media accounts
  • Dedicated to funding critical technologies that strengthen the United States and its allies. Recently launched Harpoon Ventures Fund IV with 155 million dollars committed to this domestic-focused investing thesis and discussed the strategy during a financial television broadcast.
  • Interested in advanced energy and complex hardware milestones. Proudly celebrated Aalo Atomics making history when their test reactor successfully achieved initial criticality at the Idaho National Laboratory under a Department of Energy pilot program.
  • Admiration for relentless work ethic and high-momentum startup teams. Frequently shares public praise for founders who push through obstacles, expressing deep appreciation for teams that continually make progress and simply refuse to quit.

Video Interview

On keeping your initial outreach short and punchy

"If you're writing something that's literally more than four sentences, I think it's really hard to stand out. If you can't communicate why you're different and what's going on with you and your technology, your team and the market in four sentences, I'd go back to the drawing board because if it's four paragraphs... it looks like you're desperate."
Larsen Jensen
General Partner, Harpoon Ventures

On how quickly VCs know if they're interested

"You sort of know whether, not for sure if you're going to invest, but your level of interest in the first five to 10 minutes. These calls should be five to 10 minutes long... it doesn't take an hour, it doesn't take 30 minutes. All of that is just getting into the details to validate or invalidate that initial interest."
Larsen Jensen
General Partner, Harpoon Ventures

On the best way to get in front of a VC

"Coming in through an existing founder that we've invested in. Number one, everything else, very far second place, wide margin. Getting an intro through a founder that we've worked with before, that we have a really strong relationship, is the single best way to do it."
Larsen Jensen
General Partner, Harpoon Ventures

On choosing the right investor over the highest valuation

"If we all believe that this is going to be a multi-billion dollar outcome, optimizing for valuation within general ranges at an early stage is just not smart... it's almost like an indictment on your own confidence of how big this is going to get."
Larsen Jensen
General Partner, Harpoon Ventures

On reading a VC's real level of interest

"Actions talk, bullshit walks. You got to see what the actions are to validate interest. If they haven't heard from them, there's no engagement... it's like dating. Go back in time... if it's not being reciprocated, the chances of being a yes are rather low."
Larsen Jensen
General Partner, Harpoon Ventures

About their Fund

Harpoon Ventures

Sectors
Defense, Deeptech / Hardware, Energy, Climate, Cybersecurity, Materials, AI, Chips, Biotech, Robotics
Rounds
Pre-Seed - Series A
Avg Check Size
$100K - $5M

Harpoon Ventures is led by Larsen Jensen, a former Navy SEAL and Olympic swimmer, who brings a "warrior ethos" to investing in what the firm calls the "Freedom Stack"—foundational technologies like AI, autonomy, cyber, space, and energy that are critical to American national security.

The firm specializes as a bridge between early-stage startups and complex government buyers, with a team of former national security operators and acquisition experts who help founders navigate procurement and dual-use commercialization beyond typical venture capital support.

Is this information out of date? Let us know

Popular Investors

investor name
Active in
Rounds
Avg. Check
Links
Deeptech / Hardware
Robotics
Biotech
+
12
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Biotech
Health
Deeptech / Hardware
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$250K - $2M
Unknown
Biotech
Health
Climate
+
4
View more in profile...
Unknown
Seed - Series B+
Unknown
$1M - $3M
Unknown
Climate
Deeptech / Hardware
Materials
+
4
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $1.5M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
7
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
~$750K
Unknown
Fintech
Deeptech / Hardware
Devtools
+
2
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$250K-$1M
Unknown
AI
Biotech
Robotics
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$100K - $500K
Unknown
Or automatically find your investor matches
Upload your pitch deck to get your best investor matches in minutes.
Reveal the very best VCs to pitch for your startup
Get matching investors' email addresses
No ads. No catch. Free from VC Sheet.
Must be a valid email  to receive results
Upload and Submit Deck (50MB Max)
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Success. Check your email in 5 minutes.
Browse Sheets
Sheet Type
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Browse
Sheets

Sheets are curated lists of funds and investors for various sectors, stages and geographies.

Sector-focused sheets

Stages-focused sheets

Geography-focused sheets

Misc sheets

No results match these filters...