Oak HC/FT

In a new blog post, Oak HC/FT General Partner Matt Streisfeld explores how AI is driving a structural reallocation of human and machine capital – not just reducing headcount, but fundamentally changing how work gets done. Recent signals, from Block’s shift toward “intelligence tools” and leaner teams to market reactions following Anthropic’s Claude Code Security launch, suggest the market is establishing a new baseline for operational velocity and efficiency – fundamentally rewriting the startup playbook. Read Matt’s full perspective: https://lnkd.in/ermfNxJ7

Every generation, step changes in technology enable the creation of new infrastructure layers in healthcare – and we believe clinical capacity is next. Thesis Care is building that layer, pairing AI agents with expert clinicians to expand care team capacity at some of the nation’s largest physician groups. We're leading their $45 million Series A, and couldn't be more excited to keep building alongside Niren Gandra and Aditya Pandyaram. Read more: https://lnkd.in/exdKABQT

We're thrilled that Oak HC/FT is leading Spade's $40M Series B. Spade solves one of fintech's most stubborn infrastructure problems – transforming raw transaction records into verified merchant intelligence in real time, with more than 99% accuracy and 99.9% coverage across U.S. and Canadian merchants. The next decade of fintech will be built by institutions that can see their data in real time, at scale, with enough accuracy to act on it – and we believe Spade is how that happens. Read more: https://lnkd.in/eQ3A4t9u

I've been on the internet long enough to know that starting a post with 'some news!' is a tell. So I'll just say it: after 4.5 incredible years at Andreessen Horowitz, I've joined Oak HC/FT as a Partner. a16z was a defining chapter in my life and career. I learned the craft of investing from some of the most talented VCs on the planet. I backed extraordinary entrepreneurs who are changing the world in real-time. I found my voice online and wrote about ideas and markets in a way that felt authentic to me. And I made many lifelong friends throughout the process. I have endless amounts of gratitude for David Haber for bringing me to the firm, and for Alastair, Anish, Angela and the whole Apps investing team for making my time there such a formative and fulfilling experience. There are far too many people to tag and thank, so I’ll leave it at that for now. So why Oak — and why now? Fintech is being redefined. For years, the category meant modernizing the core infrastructure of traditional financial services — replacing legacy systems with digital-first alternatives. That era produced transformational companies, and Oak was there. But the category's edges are expanding. In my conversations with Annie Lamont and Matt Streisfeld, it was clear they saw fintech the way I did – as everything at the intersection of technology and money. That includes traditional fintech businesses, but also adds the full spectrum of companies shaping how financial decisions are made, how money flows, how risk is managed, and how value is exchanged in an agentic world. Through that lens, many, many companies are fintech companies, and we couldn’t be more excited to go find the most ambitious ones. Luckily, we just announced roughly $2B in freshly committed capital to put to the task! Speaking of the task at hand: you may know Oak best for its track record of backing exceptional growth stage companies. While that is still very core to the mandate, I’ll also be focused on expanding our presence in early stage investing and earning the right to partner with the most talented entrepreneurs as early as the inception stage. If you’re raising anything from a $1M to $100M round, my goal is to make Oak your preferred partner. With that in mind – we are hiring! We’re looking for two new investors to join the fintech team. You might be a good fit if you’re a technical operator with a deep network interested in trying your hand at investing, or an early career investor looking for a very high agency next gig. Please reach out if you’d like to toss your hat in the ring! I’ve gone from the Other Marc A at a16z to simply marc@oakhcft.com. There’s lots to do, and my energy levels are through the roof. Huge thanks to Annie and Andrew for bringing me on board and trusting me with the mission at hand. And shout out to the new squad Matt, Oivind, Allen, Audrey, Felix – I couldn’t be more excited to work together. And now, I think it’s okay to say one last time: it’s time to build!

Fintech is being fundamentally redefined. What once was about modernizing legacy systems has now expanded into a broader, deeper opportunity at the intersection of technology and money. From how financial decisions are made to how capital flows and risk is managed, the next wave of innovation is happening across the full financial architecture – and Oak is investing boldly in that future.   Today, we’re thrilled to welcome Marc Andrusko as a Partner on our fintech investment team. Marc brings a rare combination of operating experience and investment instinct, with a career spanning capital markets, financial data infrastructure, and AI-era investing that mirrors exactly how we think about where fintech is headed.   His full-stack experience makes him the ideal partner to help lead this charge. Please join us in welcoming Marc!   Read more: https://lnkd.in/ehVd4tMP

We're proud to lead Turquoise's $40M Series C. Turquoise is transforming healthcare's financial infrastructure – replacing complex contracts and manual workflows with a generative AI-native platform that brings transparency and automation to how payers and providers work together. We've tracked Chris Severn, Adam Geitgey, and the team since 2021, and we couldn't be more excited to partner with them in this next chapter. Read more: https://lnkd.in/gRKTzGxg

Big congratulations to Highnote, justt, and Rillet on earning spots on Forbes Fintech 50! This recognition is a great reflection of the innovation and momentum each of these companies is building in fintech. Check out the full list here: https://lnkd.in/eG2Q8NHH

Congratulations to Fundamental on coming out of stealth and announcing its $255M Series A alongside a strategic partnership with Amazon Web Services (AWS). We’re excited to lead this round and back Jeremy Fraenkel and the team as they redefine enterprise decision-making and build the default predictive operating system for the world’s most critical industries. Read more: https://lnkd.in/eUXR2C3B

As we start the year, we’re thrilled to share some well-deserved promotions across the Oak HC/FT team. Please join us in congratulating them!   ⭐ Felix Schliemann and Neel Baxi promoted to Senior Associate ⭐ Colleen Cozzens promoted to Vice President, Head of Talent, Healthcare

Always fun to kick off the year with my annual conversation on The Heart of Healthcare Podcast. We talked through my healthcare predictions for the year ahead and what I’m watching as we head into 2026. Thank you to Steve Kraus and Halle Tecco, MPH, MBA for having me back!