# Nat Friedman

> Nat Friedman is a seed investor at California YIMBY backing Artificial Intelligence and Software. See 148 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [California YIMBY](https://shizune.co/investors/profile/california-yimby)
- Location: San Francisco, United States
- Total investments: 148
- Last investment: Jun 2026
- Lead investor: 23%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/natfriedman
- X (Twitter): http://twitter.com/natfriedman
- Website: https://www.bilgisayartime.com/

Nat Friedman is an entrepreneur and developer. He attended the Massachusetts Institute of Technology. Nat Friedman has two degrees from MIT and has been writing software for 27 years. Nat Friedman is passionate about building products that delight customers with love and attention to detail.In 1999, he co-founded Ximian with Miguel de Icaza. Natwas a co-founder and chairman of the GNOME Foundation. At Novell, Nat ran engineering for a $110M product and served as CTO of the Linux business.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $2M–$15M |
| Series A | $11M–$60M |
| Series B | $28M–$130M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Artificial Intelligence | 49 | 33% |
| Software | 43 | 29% |
| Information Technology | 24 | 16% |
| Machine Learning | 16 | 11% |
| Developer Tools | 12 | 8% |

119 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 49 | 33% |
| Series A | 44 | 30% |
| Series B | 17 | 11% |
| Pre-Seed | 10 | 7% |
| Series C | 7 | 5% |

10 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 90 | 61% |
| United Kingdom | 3 | 2% |
| India | 1 | 1% |
| Spain | 1 | 1% |
| France | 1 | 1% |

6 countries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| NewLimit | NewLimit specializes in treating age-related diseases to extend the human health span. It works on developing epigenetic reprogramming medicines to treat diseases with large unmet needs. | $435M | Series C | Jun 02, 2026 |  |
| Viktor | Viktor is an AI‑driven platform that acts as a virtual coworker inside messaging and collaboration tools, connecting to a broad set of business‑software systems to automate workflows, run tasks, and support knowledge‑work operations across marketing, operations, and engineering functions. | $75M | Series A | May 19, 2026 |  |
| Granola | AI note-taking solution | $125M | Series C | Mar 25, 2026 |  |
| Shellworks | Shellworks is a biomaterials company that develops and manufactures a bio-based material that offers a sustainable alternative to conventional plastics. The company’s technology converts natural raw materials into polymers that can be used in packaging, consumer goods, and other applications where traditional plastics are commonly employed. Vivomeris engineered to provide similar functional properties as conventional plastics while offering improved environmental performance through biodegradability or compostability. Shellworks focuses on integrating its materials into manufacturing processes, collaborating with companies seeking to reduce plastic waste and transition to renewable, circular solutions. Through its research, development, and production of bio-based polymers, the company aims to enable practical, eco-friendly material alternatives across multiple industries. | $15M | Series A | Mar 04, 2026 |  |
| Sumble | Sumble provides a sales intelligence platform that crawls the web for technographic and contact data, giving sales teams context on prospective customers. | $30M | Series A | Oct 22, 2025 |  |
| Composite | Reinventing knowledge work in your browser | $5.6M | Seed | Sep 30, 2025 |  |
| Medra AI | Medra AI automates repetitive wetlab tasks so scientists can collect data and run the experiments needed to make scientific discoveries | $11M | Pre-Seed | Sep 11, 2025 |  |
| Julius AI | Julius AI develops a platform that analyzes data with computational AI. It enables users to analyze datasets, create visualizations, solve math, and much more. | $10M | Seed | Jul 28, 2025 |  |
| Artificial Intelligence Underwriting Company | Artificial Intelligence Underwriting Company Certify and insure AI agents to unlocks secure AI adoption for enterprises. | $15M | Seed | Jul 23, 2025 |  |
| XBOW | XBOW operates autonomously, carrying out commands and analyzing the results to achieve higher-level objectives. | $75M | Series B | Jun 24, 2025 |  |

10 of 148 investments shown.

## Co-investors
- [Sequoia Capital](https://shizune.co/investors/profile/sequoia-capital) — VC Fund, 26 deals together
- [Lightspeed Venture Partners](https://shizune.co/investors/profile/lightspeed-venture-partners) — VC Fund, 20 deals together
- [SV Angel](https://shizune.co/investors/profile/sv-angel) — VC Fund, 12 deals together
- [Y Combinator](https://shizune.co/investors/profile/y-combinator) — VC Fund, 11 deals together
- [Andreessen Horowitz](https://shizune.co/investors/profile/andreessen-horowitz) — VC Fund, 9 deals together
- [Spark Capital](https://shizune.co/investors/profile/spark-capital) — VC Fund, 9 deals together

## About California YIMBY

VC Fund · Sacramento, United States

California YIMBY is a community of neighbors who welcome more neighbors. They’ve built a fast-growing, statewide movement for housing reform, with over 80,000 members and 20 local teams comprised of volunteers dedicated to ensuring all Californians and future Californians have a home. From Humboldt to San Diego, California YIMBY organizers areengaging voters, homeowners, renters, businesses, civic leaders, faith communities, affordable housers, and changing the conversation about housing. They connect their volunteers and members directly with the local and state leaders who write and pass policy.

4 contacts available at California YIMBY.

| Name | Title | Profile |
| --- | --- | --- |
| Nat Friedman | Co-Founder | https://shizune.co/investors/profile/nat-friedman |
| Nat Friedman | Co-Founder | https://shizune.co/investors/profile/knut-friedman |
| Nat Friedman | Co-Founder | https://shizune.co/investors/profile/nat-friedman-5a2d |
| Zachary Rosen | Co-Founder & Board of Directors | https://shizune.co/investors/profile/zack-rosen |

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## FAQ

### What does Nat Friedman invest in?

Nat Friedman invests primarily in Artificial Intelligence, Software and Information Technology startups, most often at Seed and Series A stage. Most of the 148 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Nat Friedman's check size?

Nat Friedman typically joins rounds of $2M–$15M at Seed, $11M–$60M at Series A and $28M–$130M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Nat Friedman participates in.

### When did Nat Friedman last invest?

The most recent investment recorded for Nat Friedman closed in Jun 2026. Shizune tracks 148 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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