# Stuart Davidson

> Stuart Davidson is a seed investor at Sonen Capital backing Information Technology and Audio. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Sonen Capital](https://shizune.co/investors/profile/sonen-capital)
- Location: San Francisco, United States
- Total investments: 3
- Last investment: Mar 2014
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/stuartpdavidson

Stuart Davidson is a seed investor at Sonen Capital in San Francisco focused on Information Technology and Audio. Stuart Davidson - Co-Founder & Chairman @ Sonen Capital

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Information Technology | 2 | 67% |
| Audio | 1 | 33% |
| Mobile | 1 | 33% |
| Big Data | 1 | 33% |
| Internet | 1 | 33% |

10 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 33% |
| Series B | 1 | 33% |
| Convertible Note | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Ionos Networks | Ionos Networks is a stealth mode technology company that redefines networking through improvement. It was founded with the support of companies such as Cisco, Juniper, HP, Alcatel, and several other startups, including Meru Networks, SiNett, Packet Engines, and others. Ionos Networks is based in San Jose, California. | $1M | Convertible Note | Mar 01, 2014 |  |
| PlaceIQ | For brands seeking to understand consumer behavior, PlaceIQ connects physical and digital activities across time, space, and mobile devices to uncover opportunities to learn and connect with audiences. PlaceIQ is a powerful, location-based audience and insights platform that organizes a wide variety of consumer activity data around a preciselocation-base map at a massive scale. PlaceIQ uses its detailed understanding of location and consumer activity to reach a targeted audience, and also to derive powerful insights about consumer behavior to inform market and business strategies for national brands. The company is headquartered in New York City and also has offices in Palo Alto, Chicago, and Detroit. | $1M | Seed | Apr 05, 2011 |  |
| Jangl | Jangl is an end-to-end weblead and phone call distribution tracking platform. Jangl’s platform allows lead generators, aggregators, buyers and sellers to run their businesses by giving them tools like real-time ping/post bidding APIs, dynamic call IVRs, and advanced revenue-driven placement algorithms.Jangl provides its services to users ofFacebook (JanglMe application), Bebo, Plentyoffish.com, Match.com, Friendster, Tagged, FriendFinder, Fubar, and more, and also offers its services at Jangl.com.In late 2007, Jangl began testing a variety of ad placements in phone calls and SMS messages. One of its most recently partners - dating site Plentyoffish.com - will be a free service supported entirely by advertising. This advertising revenue stream will be Jangl's second, as the company has already been generating partner revenue since January 2007.In May 2008, it was revealed that the company's two founders had left for | $7M | Series B | Jul 17, 2006 |  |

3 of 3 investments shown.

## Co-investors
- [Cardinal Venture Capital](https://shizune.co/investors/profile/cardinal-venture-capital) — VC Fund, 1 deal together
- [IA Ventures](https://shizune.co/investors/profile/ia-ventures) — VC Fund, 1 deal together
- [MDC Ventures](https://shizune.co/investors/profile/kbs-p-ventures) — VC Fund, 1 deal together
- [Labrador Ventures](https://shizune.co/investors/profile/labrador-ventures) — VC Fund, 1 deal together
- [Neu Venture Capital](https://shizune.co/investors/profile/neu-venture-capital) — VC Fund, 1 deal together
- [Social Leverage](https://shizune.co/investors/profile/social-leverage) — VC Fund, 1 deal together

## About Sonen Capital

VC Fund · San Francisco, United States

Sonen Capital is a dedicated impact investment management firm. Their name is derived from Social and Environmental investing and reflects their values and their conviction that investing to generate financial returns and lasting social and environmental impact are not only compatible but also mutually reinforcing objectives.With over fivedecades of combined sustainable investing learning and experience, Sonen team members are field builders dedicated to helping mobilize financial assets to help meet large-scale global challenges. This deep experience serves not only to inform and improve Their knowledge and understanding of this evolving area, but it also enhances. Their ability to deliver to their clients increasingly more sophisticated and holistic impact investing solutions.

5 contacts available at Sonen Capital.

| Name | Title | Profile |
| --- | --- | --- |
| Stuart Davidson | Co-Founder & Chairman | https://shizune.co/investors/profile/stuart-davidson |
| Amando Balbuena | Marketing Manager | https://shizune.co/investors/profile/amando-balbuena |
| Bob Goldstein | CEO | https://shizune.co/investors/profile/bob-goldstein |
| Isabelle Hau | Board Member | https://shizune.co/investors/profile/isabelle-hau |
| Nick Koukopoulos | Head of Investments | https://shizune.co/investors/profile/nick-koukopoulos |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Stuart Davidson invest in?

Stuart Davidson invests primarily in Information Technology, Audio and Mobile startups, most often at Seed and Series B stage. Most of the 3 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 Stuart Davidson last invest?

The most recent investment recorded for Stuart Davidson closed in Mar 2014. Shizune tracks 3 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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