Keith Hamlin
Managing Partner @ Third Prime
New York, United States
Keith Hamlin is a seed investor at Third Prime in New York focused on Software and Information Technology. Keith is a Founder and Managing Partner of Third Prime Capital, and is involved in all aspects of the Firm's business.Prior to Third Prime, Keith was a mergers and acquisitions lawyer representing private equity funds in the acquisition, financing and sale of portfolio companies. Subsequently, he managed the alternative investment portfoliofor a NY-based family office, focusing on direct investments in private companies, acquisitions of distressed hospitality assets, the development of self-storage and residential condo assets and capital allocation to private equity, venture capital and hedge funds. Keith has been investing personally in private companies since 2005 and currently serves on the boards of Latch, Phase Change Energy Solutions, and The New Primal. He is a graduate of Duke University and Harvard Law School.
- Total investments:
- 17
- Last investment:
- Lead investor:
- 59%
Last updated:
For AI agents: llms.txt
Industries Keith Hamlin invests in
Stages Keith Hamlin invests in
Countries Keith Hamlin invests in
Investment Focus
Industry
- Software 4 (24%)
- Information Technology 3 (18%)
- Artificial Intelligence 3 (18%)
- Compliance 2 (12%)
- Health Care 2 (12%)
Stage
- Seed 8 (47%)
- Pre-Seed 2 (12%)
- Series A 2 (12%)
- Series B 2 (12%)
- Series C 2 (12%)
Country
- United States 9 (53%)
- United Kingdom 1 (6%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
CalmWave
|
almWave provides a platform that uses AI and expert services to help healthcare organizations optimize operations and make data-informed decisions. Utilizing a healthcare organization’s data, the company transparently empowers leadership to manage staff more efficiently, reduce turnover rates, and improve patient outcomes. | $4.4M / Seed / Jun 26, 2025 | |
|
CalmWave
|
almWave provides a platform that uses AI and expert services to help healthcare organizations optimize operations and make data-informed decisions. Utilizing a healthcare organization’s data, the company transparently empowers leadership to manage staff more efficiently, reduce turnover rates, and improve patient outcomes. | $5.3M / Seed / Nov 19, 2024 | |
Galleon
|
Galleon is a residential real estate marketplace where customers can list, browse, and purchase homes not listed on the MLS. Our mission is to expand residential real estate inventory, simplify the transaction, and empower customers to purchase and sell homes on their terms. | $1.5M / Pre-Seed / Apr 17, 2024 | |
Thoropass, Inc.
|
Laika helps growing businesses manage compliance, obtain security certifications, and build trust in the marketplace. Get certified faster, close larger deals, and build scalable security practices that stand the test of any audit. | $50M / Series C / Nov 08, 2022 | |
Thoropass
|
At Thoropass, we’re compliance experts so you don’t have to be. Pairing easy software that’s always getting smarter with expert guidance and continuous monitoring, we integrate into your process to prepare you to pass any audit, every year, with flying colors. Hundreds of growing companies use Thoropass’s compliance automation platform, expertservices, auditors and partner ecosystem to get and stay compliant over the lifetime of their business. We offer SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, and other infosec and privacy frameworks. Learn more at www.thoropass.com. | $50M / Series C / Nov 08, 2022 | |
Rigor
|
Rigor decentralizes lending and coordinates payment flows with construction logistics. | $3.5M / Seed / Jun 16, 2022 | |
Abbey Cross
|
B2B, Trading and Compliance Venue for deliverable (think payments) Emerging Market Currencies. Linking Payments banks to the suppliers of EM Trading and Settlement services | $2.5M / Pre-Seed / Apr 01, 2022 | |
FairPlay24
|
The world's first Fairness-as-a-Service company, offering tools that embed fairness into AI decision-making and reducing algorithmic bias. | $4.5M / Seed / Nov 15, 2021 | |
|
Thoropass, Inc.
|
Laika helps growing businesses manage compliance, obtain security certifications, and build trust in the marketplace. Get certified faster, close larger deals, and build scalable security practices that stand the test of any audit. | $35M / Series B / Nov 02, 2021 | |
|
Thoropass
|
At Thoropass, we’re compliance experts so you don’t have to be. Pairing easy software that’s always getting smarter with expert guidance and continuous monitoring, we integrate into your process to prepare you to pass any audit, every year, with flying colors. Hundreds of growing companies use Thoropass’s compliance automation platform, expertservices, auditors and partner ecosystem to get and stay compliant over the lifetime of their business. We offer SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, and other infosec and privacy frameworks. Learn more at www.thoropass.com. | $35M / Series B / Nov 02, 2021 | |
| See all 17 investments → | |||
Co-Investors
About Third Prime
Third Prime is a leading New York and Nashville based early-stage venture capital firm, with over $500mm assets under management.
Third Prime Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Benji Rosenblatt
Associate
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Christian Kaczmarczyk
Principal
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Jeff Adelson Yan
Venture Partner
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Jenny Bloom
General Counsel and COO
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Keith Hamlin
Managing Partner
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FAQ
What does Keith Hamlin invest in?
Keith Hamlin invests primarily in Software, Information Technology and Artificial Intelligence startups, most often at Seed and Pre-Seed stage. Most of the 17 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
When did Keith Hamlin last invest?
The most recent investment recorded for Keith Hamlin closed in Jun 2025. Shizune tracks 17 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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