# Flatiron Partners

> Flatiron Partners is a VC fund in New York backing Internet and E-Commerce. See 41 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: New York, United States
- Total investments: 41
- Last investment: Feb 2021
- Lead investor: 20%
- Fund size: $5.9M
- Last fund: Apr 2016
- Last updated: Aug 2026
- Website: http://www.flatironpartners.com
- Facebook: https://www.facebook.com/flatironpartners

Flatiron Partners is a VC fund in New York focused on Internet and E-Commerce. In 1996, Fred Wilson co-founded Flatiron Partners with his partner Jerry Colonna. Flatiron, named after the Flatiron District, became a successful, primarily follow-on investment fund in the New York City area, with investments in notable Dot-com bubble successes and failures including Alacra, comScore Networks, Yoyodyne, Geocities, Kozmo.com, NewYork Times Digital, PlanetOut, Return Path, Scout electromedia, Standard Media International, Starmedia, and VitaminShoppe.com. The firm's 1996 fund capitalized at $150 million with two investors: SOFTBANK Technology Ventures and Chase Capital Partners, the private-equity arm of Chase Manhattan Corp. The firm later raised another fund capitalized at $500 million with Chase Capital Partners as the sole active LP. In 2001, Wilson and Colonna essentially shut down Flatiron (although they still manage what remains of its portfolio). Wilson offered a blunt assessment in July 2005 in Business 2.0, "Yeah, boy, we really screwed up a bunch of things."

## Contacts

5 contacts available for Flatiron Partners. Shizune tracks 2 team members at Flatiron Partners. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/flatiron-partners?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Series A | $6M–$28M |
| Series B | $6.2M–$71M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Internet | 13 | 32% |
| E-Commerce | 6 | 15% |
| Software | 5 | 12% |
| Marketing | 5 | 12% |
| Mobile | 4 | 10% |

70 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Funding Round | 12 | 29% |
| Series B | 9 | 22% |
| Series A | 6 | 15% |
| Series C | 5 | 12% |
| Series D | 4 | 10% |

8 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 29 | 71% |
| Brazil | 2 | 5% |
| Mexico | 1 | 2% |
| Argentina | 1 | 2% |
| Switzerland | 1 | 2% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Peter Himler | Founding Principal | 0 | https://shizune.co/investors/profile/peter-himler |
| Charles Lax | Founder | 9 | https://shizune.co/investors/profile/charles-r-lax |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Green Check Verified | Green Check Verified provides dispensaries with the tools they need to access local banking services and get back to business. It provides a RegTech platform that enables transparent, verifiable, compliant banking for cannabis industry. The company was founded in 2017 and headquartered in North Haven, Connecticut. | $2.4M | Convertible Note | Feb 09, 2021 |  |
| PathogenDx | PathogenDx has developed a microarray based test specifically designed for the cannabis, botanical, food and agricultural testing markets. Our technology allows test labs to conduct between 12- 48 tests in parallel, testing up to 20 pathogens per test in less than a days’ shift. This is done at a fraction of the cost of plate counts or RealtimePCR. Our Raw Sample technology allows laboratories to bypass almost 20 steps that Real-time PCR must perform for DNA extraction and purification. PathogenDx technology bypasses the need for purification, quantitation, and normalization increasing the speed and affordability of pathogen screening. This helps our customers reduce testing time by 12 hours on the front end, and avoid spending money on sample prep kits and additional instrumentation. | $7.5M | Series B | Sep 30, 2019 |  |
| Willow Industries | Willow Industries provides cutting edge technology for post-harvest microbial decontamination in cannabis. Based in Denver, CO, they provide state-of-the-art technology to clean and purify flower & trim. Their patent-pending machine, WillowPure, uses ozone-based oxidation to reduce mold, yeast, mildew, Aspergillus, Salmonella, E. Coli andother potential pathogens. All while protecting the medicinal properties, aroma, potency and visual appearance of the flower. | $2M |  | Jun 12, 2019 |  |
| comScore | comScore (NASDAQ: SCOR) is the cross-platform measurement company that precisely measures audiences, brands and consumer behavior everywhere. comScore completed its merger with Rentrak Corporation in January 2016 to create the new model for a dynamic, cross-platform world. Built on precision and innovation, our unmatched data footprint combinesproprietary digital, TV and movie intelligence with vast demographic details to quantify consumers' multiscreen behavior at massive scale. This approach helps media companies monetize their complete audiences and allows marketers to reach these audiences more effectively. With more than 3,200 clients and global footprint in more than 75 countries, comScore is delivering the future of measurement. For more information on comScore, please visit comscore.com. | $12M | Series E | Aug 05, 2003 |  |
| comScore | comScore (NASDAQ: SCOR) is the cross-platform measurement company that precisely measures audiences, brands and consumer behavior everywhere. comScore completed its merger with Rentrak Corporation in January 2016 to create the new model for a dynamic, cross-platform world. Built on precision and innovation, our unmatched data footprint combinesproprietary digital, TV and movie intelligence with vast demographic details to quantify consumers' multiscreen behavior at massive scale. This approach helps media companies monetize their complete audiences and allows marketers to reach these audiences more effectively. With more than 3,200 clients and global footprint in more than 75 countries, comScore is delivering the future of measurement. For more information on comScore, please visit comscore.com. | $20M | Series D | Jun 06, 2002 |  |
| Bigfoot Interactive | Bigfoot Interactive has developed successful permission-based email programs for more than 150 top companies. As a major innovator in email communications since the industry’s inception, Bigfoot Interactive has established many of the original email communications philosophies and best practices widely used today.Over time, Bigfoot Interactive’sleading email technology has evolved to meet and exceed the demands of marketers and communicators. Today, Bigfoot Interactive's technology platform is available in a wide range of offerings, from full-service broadcast to ASP/collaborative ASP to enterprise-level integrated solutions. Surrounding the company’s technology platform is a suite of blue-ribbon professional services that help drive maximum results. These services include list acquisition, strategic consulting, creative design and production, data solutions and analytics/modeling. | $6M | Series C | Jan 23, 2002 |  |
| comScore | comScore (NASDAQ: SCOR) is the cross-platform measurement company that precisely measures audiences, brands and consumer behavior everywhere. comScore completed its merger with Rentrak Corporation in January 2016 to create the new model for a dynamic, cross-platform world. Built on precision and innovation, our unmatched data footprint combinesproprietary digital, TV and movie intelligence with vast demographic details to quantify consumers' multiscreen behavior at massive scale. This approach helps media companies monetize their complete audiences and allows marketers to reach these audiences more effectively. With more than 3,200 clients and global footprint in more than 75 countries, comScore is delivering the future of measurement. For more information on comScore, please visit comscore.com. | $15M | Series C | Aug 13, 2001 |  |
| Vindigo | Vindigo is one of the industry's leading mobile media companies. The company publishes and distributes mobile media through a network of partnerships that includes all tier-one U.S. wireless carriers, with combined reach of more than 140 million mobile subscribers. Vindigo sells mobile content including wallpaper, ringtones, local information,maps, news, entertainment and sports. Vindigo also provides a full suite of mobile marketing solutions to more than 100 advertisers including Cadillac and MasterCard. Vindigo is a wholly owned subsidiary of For-Side.com, one of the largest mobile media companies in the world.Vindigo understands the mobile user—and consumers love our products. Since 1999, millions of subscribers have downloaded our content, and Vindigo continues to deliver fun and easy-to-use mobile media services to consumers today. To learn more about how to add life to your phone, or how to extend your brand to mobile media, contact us today. | $6.2M | Series B | Jul 02, 2001 |  |
| PlanetOut | PlanetOut, Inc. is a leading global online media company serving the lesbian, gay, bisexual and transgendered, or LGBT, community, a market with reported buying power of approximately $485 billion annually in the United States alone. Their network of websites, including their flagship websites Gay.com and PlanetOut allows their members, or thosevisitors who registered on their websites by providing them with a name, e-mail address and other personal data, to connect with other members of the LGBT community around the world. According to Nielsen NetRatings, in June 2004, Gay.com ranked second in terms of average time online per person and sixteenth in terms of visits per person among all websites measured. They generate most of their revenue from subscription fees for premium membership services that they offer in English, French, German, Italian, Portuguese and Spanish to their members who identify themselves as residing in more than 100 countries. They also generate revenue from online advertising and e-commerce targeted to the LGBT community. | $8.2M | Series D | May 10, 2001 |  |
| Planetout Partners | Based in San Francisco, PlanetOut Partners is the premier online community services and media company serving gay, lesbian, bisexual and transgender people and their families and friends. The company's two largest online portals, Gay.com and PlanetOut.com, leverage the distribution power and reach of the Internet to provide products andservices to more than 4.3 million consumers each month (DoubleClick DART) and more than 2.4 million registered members. The Gay.com portal offers an extensive global network that provides interactive services including chat, message boards, email,Kleptomaniac ecommerce services and original content channels. The Gay.com network includes sites in the U.S., France, the United Kingdom, Latin America, and Italy. The PlanetOut.com portal offers premium services such as the popular PersonalsPlus matchmaking service, as well as news, entertainment, travel, Kleptomaniac ecommerce services, Internet radio, online cinema and advice columns. PlanetOut.com has key distribution partnerships with America Online, Netscape, ICQ, Yahoo, RealNetworks, CompuServe, MSN and other major Web companies. | $8.2M | Series D | May 10, 2001 |  |

10 of 41 investments shown.

## Co-investors
- [Chase Capital Partners](https://shizune.co/investors/profile/chase-capital-partners) — VC Fund, 17 deals together
- [JPMorgan Partners](https://shizune.co/investors/profile/j-p-morgan-partners) — VC Fund, 5 deals together
- [Adams Street Partners](https://shizune.co/investors/profile/adams-street-partners) — VC Fund, 3 deals together
- [Goldman Sachs](https://shizune.co/investors/profile/goldman-sachs) — VC Fund, 3 deals together
- [Highland Capital Partners](https://shizune.co/investors/profile/highland-capital-partners) — VC Fund, 3 deals together
- [HM Capital](https://shizune.co/investors/profile/hm-capital) — VC Fund, 3 deals together

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## FAQ

### What does Flatiron Partners invest in?

Flatiron Partners invests primarily in Internet, E-Commerce and Software startups, most often at Funding Round and Series B stage. Most of the 41 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 Flatiron Partners's check size?

Flatiron Partners typically joins rounds of $6M–$28M at Series A and $6.2M–$71M 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 Flatiron Partners participates in.

### How do I contact Flatiron Partners?

Public channels for Flatiron Partners include the website linked on this profile and Facebook. 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 Flatiron Partners?

The team at Flatiron Partners includes Peter Himler (Founding Principal) and Charles Lax (Founder). 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 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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