John Sariri

Private Investor | Real Estate | Capital Allocation

📍 United States🔄 Updated September 2026💼 16 investments📅 5 years investing🗓 Last invested Jun 2026
Angel investor🌍 United StatesInvested this quarter
16
Total investments
0
Early stage
3
Mid stage
4
Late stage
5y
Years active

Portfolio

14 investments · sorted by recency
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Investor
Jun 2026
Hello! We are the team at Prometheus. Thank you for following us on this journey.
Investor
Jun 2026
Figure is an AI Robotics company building the worlds first commercially viable autonomous humanoid robot. We are based in San Jose, CA.
Investor
Jan 2026
Industrial humanoids hard at work.
Investor
Jan 2026
As the AI factory company, Crusoe is on a mission to accelerate the abundance of energy and intelligence. The company provides a reliable, scalable, cost-effective, and energy-first solution for AI infrastructure. By harnessing large-scale energy resources, building AI-optimized data centers, and delivering an AI cloud platform, Crusoe empowers its customers to build the future faster.
Investor
Dec 2025
The first US federally regulated exchange where you can trade on the outcome of any event. Kalshi’s historical regulatory approval from the CFTC enables it to offer a new asset class called “event contracts,” which allow traders to take positions on whether a future event will happen or not. Kalshi aims to enable investors to trade on almost anything with economic relevance from Covid numbers to whether a bill will pass in Congress, broadening the historical definition of what a commodity derivative is and paving the way for the futures market to catch up to the novel risks facing the economy today. Kalshi is backed by Sequoia, Henry Kravis, Charles Schwab, and Y Combinator.
Investor
Dec 2025
Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. Our team previously built frontier LLMs at labs like DeepMind, OpenAI, and Anthropic. We believe AI should be built in the open, with transparent research and collaborative development. That means giving enterprises, governments, and sovereign entities true ownership and control of AI that performs at the highest level. Our mission: make intelligence open and accessible to all.
Investor
Dec 2025
Vercel provides the developer tools and cloud infrastructure to build, scale, and secure a faster, more personalized web. Customers like Under Armour, Nintendo, The Washington Post, and Zapier use Vercel to build dynamic user experiences on the web.
Investor
Oct 2025
The most powerful answer engine. Powering curiosity with answers backed by up-to-date sources. This is where knowledge begins.
Investor
Aug 2025
Founded in 2015, Shield AI is a venture-backed defense-tech company with the mission of protecting service members and civilians with intelligent systems. Its products include Hivemind autonomy software, V-BAT and X-BAT aircraft, and Aechelon simulation and synthetic reality technologies. With offices and facilities across the U.S., Europe, the Middle East, and Asia-Pacific, Shield AI’s technology actively supports operations worldwide.
Investor
Jun 2025
Understand the Universe. We are a team of AI technologists and business leaders on a mission to build AI systems that can help humanity understand the world better. https://x.ai/careers
Investor
May 2025
Databricks is the Data and AI company. More than 20,000 organizations worldwide — including adidas, AT&T, Bayer, Block, Mastercard, Rivian, Unilever, and over 60% of the Fortune 500 — rely on Databricks to build and scale data and AI apps, analytics and agents. Headquartered in San Francisco with 30+ offices around the globe, Databricks offers a unified Data Intelligence Platform that includes Agent Bricks, Lakeflow, Lakehouse, Lakebase and Unity Catalog. --- Databricks applicants Please apply through our official Careers page at databricks.com/company/careers. All official communication from Databricks will come from email addresses ending with @databricks.com or @goodtime.io (our meeting tool).
Investor
May 2025
Discord is used by over 200 million people every month for many different reasons, but there’s one thing that nearly everyone does on our platform: play video games. Over 90% of our users play games, spending a combined 1.5 billion hours playing thousands of unique titles on Discord each month. Discord plays a uniquely important role in the future of gaming. We are focused on making it easier and more fun for people to talk and hang out before, during, and after playing games. We believe games give us a way to have fun with our favorite people, whether listening to music together or grinding in competitive matches for diamond rank. Join us in our mission! Take a look at https://discordapp.com/jobs for openings.
Investor
Jun 2024
Were an AI research company that builds reliable, interpretable, and steerable AI systems. Our first product is Claude, an AI assistant for tasks at any scale. Our research interests span multiple areas including natural language, human feedback, scaling laws, reinforcement learning, code generation, and interpretability.
Investor
Jul 2021
Optivolt is driving global energy abundance through breakthroughs in solar power electronics. The Problem: Despite its potential, solar supplies just 5% of global energy—limited by fundamental technical barriers. Minor shading can reduce power output by 90%, while systems remain bulky, expensive, time-consuming to install, and prone to failure. Optivolts Breakthrough: We realized deep integration between solar panels and power electronics unlocks an entirely new design space for innovation. This led us to inventing the Balancer (8 patents issued, 27 pending), an advanced power electronics device which embeds inside solar panels. Balancers work by shuffling power from stronger to weaker zones in the panel to keep power flowing, maximizing energy output and reliability. Performance vs. $8B market leader: • Up to 6x higher power output in real-world conditions • 40% lower equipment cost, 50% faster to install • 4x less failure points, while eliminating hotspots (#1 solar failure mode) Balancers cut the cost of solar by up to 40%, which for the first time, makes solar cheaper than the grid—everywhere. Recognizing the impact, the U.S. Department of Energy is participating in funding of Optivolt’s development.
Experience · 16 entries
All (16)
Investments (16)
2026
Investor
Jun 2026
Hello! We are the team at Prometheus. Thank you for following us on this journey.
Investor
Jun 2026
Figure is an AI Robotics company building the worlds first commercially viable autonomous humanoid robot. We are based in San Jose, CA.
Investor
Jan 2026
Industrial humanoids hard at work.
Investor
Jan 2026
Cerebras Systems is the worlds fastest AI inference. We are powering the future of generative AI. We’re a team of pioneering computer architects, deep learning researchers, and engineers building a new class of AI supercomputers from the ground up. Our flagship system, Cerebras CS-3, is powered by the Wafer Scale Engine 3—the world’s largest and fastest AI processor. CS-3s are effortlessly clustered to create the largest AI supercomputers on Earth, while abstracting away the complexity of traditional distributed computing. From sub-second inference speeds to breakthrough training performance, Cerebras makes it easier to build and deploy state-of-the-art AI—from proprietary enterprise models to open-source projects downloaded millions of times. Here’s what makes our platform different: 🔦 Sub-second reasoning – Instant intelligence and real-time responsiveness, even at massive scale ⚡ Blazing-fast inference – Up to 100x performance gains over traditional AI infrastructure 🧠 Agentic AI in action – Models that can plan, act, and adapt autonomously 🌍 Scalable infrastructure – Built to move from prototype to global deployment without friction Cerebras solutions are available in the Cerebras Cloud or on-prem, serving leading enterprises, research labs, and government agencies worldwide. 👉 Learn more: www.cerebras.ai Join us: https://cerebras.net/careers/
Investor
Jan 2026
As the AI factory company, Crusoe is on a mission to accelerate the abundance of energy and intelligence. The company provides a reliable, scalable, cost-effective, and energy-first solution for AI infrastructure. By harnessing large-scale energy resources, building AI-optimized data centers, and delivering an AI cloud platform, Crusoe empowers its customers to build the future faster.
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Investment activity
2021–2026 · 16 investments
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