Harpoon
VC Fund
Menlo Park, United States
Harpoon is an early-stage venture capital. It was formed in 2018 and is headquartered in San Diego, California.
- Total investments:
- 67
- Last investment:
- Lead investor:
- 9%
- Fund size:
- $125M
- Last fund:
Last updated:
For AI agents: llms.txt
Industries Harpoon invests in
Stages Harpoon invests in
Countries Harpoon invests in
Round sizes
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Round size
- Seed
- $4.5M–$13M
- Series A
- $12M–$61M
- Series B
- $20M–$125M
Investment Focus
Industry
- Software 13 (19%)
- Information Technology 12 (18%)
- Artificial Intelligence 11 (16%)
- Manufacturing 8 (12%)
- Security 7 (10%)
Stage
- Series A 26 (39%)
- Series B 15 (22%)
- Seed 13 (19%)
- Series C 4 (6%)
- Venture - Series Unknown 2 (3%)
Country
- United States 40 (60%)
- Germany 2 (3%)
- France 1 (1%)
- Israel 1 (1%)
- United Kingdom 1 (1%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Austin Hays
Partner
|
Partner | Total investments: 0 | Find email | |
|
Chris O'Connor
Partner
|
Partner | Total investments: 0 | Find email | |
Chris O'Connor
Partner
|
Partner | Total investments: 3 | Find email | |
Larsen Jensen
Founder and General Partner
|
Founder and General Partner | Total investments: 5 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| American Supercritical manufactures modular supercritical carbon dioxide (sCO₂) power blocks designed to convert heat into electricity. The systems connect to energy infrastructures like gas turbine exhaust stacks, nuclear reactors, reciprocating engine gensets, and heavy industrial factories. They function across a temperature range of 300 to 1000 °C to produce scalable power outputs from 10 to 100+ MW. The factory-assembled blocks utilize dry-cooling by default and operate without requiring site-specific boiler or water chemist staffing. | $8M / Pre-Seed / Sep 23, 2026 | ||
| Malachyte offers an intelligence platform that develops real-time individualization solutions. It offers real-time, cookie-free storefront customisation for consumer businesses. | $10M / Seed / Aug 05, 2026 | ||
| Singularity develops counter-weapon systems designed to detect and defeat aerial threats such as drones and low-cost munitions. The company engineers air defense technologies and manufactures key system components to support scalable deployment for military and public safety applications. Its work focuses on combining engineering, production, andtesting to develop defensive systems that can be produced and deployed efficiently. Singularity also collaborates with defense organizations, suppliers, and industry partners to support air defense operations. | $80M / Series A / Jul 14, 2026 | ||
| Alta Ares is a data integration surveillance service provider that utilizes drone imaging. | $57.6M / Series A / Jun 08, 2026 | ||
| Ulysses rewild the ocean and remove gigatons of carbon, contributing to global efforts to combat climate change and restore marine ecosystems. | $38M / Series A / Apr 16, 2026 | ||
| Cord is a collaborative training data platform with algorithmic features designed to automate manual annotation for computer vision, and make it easy to manage and evaluate training data. The company's suite of powerful tools allows for seamless collaboration across roles and teams, from domain-expert annotators to project managers and machinelearning engineers. | $60M / Series C / Feb 26, 2026 | ||
| MatX, a manufacturer of computer chips, is dedicated to constructing a computing platform for artificial general intelligence (AGI). Their specialty lies in creating hardware that combines profound domain experience tailored for large language models, graphics processing units, and various machine-learning models. By doing so, MatX aims to empowerdevelopers and programmers to enhance the efficiency, speed, and affordability of AI applications. | $500M / Series B / Feb 24, 2026 | ||
| At Material, our mission is to revolutionize battery technology and 3D printing capabilities. We strive to surpass current lithium-ion battery standards by innovating and 3D printing batteries that exceed expectations while pioneering sodium-ion and solid-state electrolyte chemistries. Embracing free-form factor 3D printing, we aim to unleash thefull potential of battery design. | $7.1M / Seed / Jan 13, 2026 | ||
| EraDrive is a startup specializing in autonomous space technology. | $6.2M / Seed / Dec 16, 2025 | ||
| Valinor Discovery uses machine learning to simulate drug performance and support data-driven drug development decisions. | $13M / Seed / Dec 10, 2025 | ||
| See all 67 investments → | |||
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FAQ
What does Harpoon invest in?
Harpoon invests primarily in Software, Information Technology and Artificial Intelligence startups, most often at Series A and Series B stage. Most of the 67 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What round sizes does Harpoon invest in?
Harpoon typically joins rounds of $4.5M–$13M at Seed, $12M–$61M at Series A and $20M–$125M at Series B. These are whole funding-round sizes, not Harpoon's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds Harpoon took part in.
How do I contact Harpoon?
Public channels for Harpoon include LinkedIn and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Who are the partners at Harpoon?
The team at Harpoon includes Austin Hays (Partner), Chris O'Connor (Partner) and Chris O'Connor (Partner). The Team section lists each member with their title, investment count and links.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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