Andrew Clark
Founder @ The Castell Group
Andrew Clark is a seed investor at The Castell Group focused on Software and Email. Andrew Clark has a 25 year career spanning many facets of the technology and energy business. Andrew is a founder and principal with The Castell Group, LLC, an investment and advisory firm assisting companies in the technology business while making investments at both ends of the risk curve from short-term arbitrage to long-term venture investing.In addition, Andrew is currently president of the Houston Angel Network, where he has invested in numerous companies spanning across a broad range of industries such as consumer products, internet-enabled businesses, enterprise software, cleantech, and life sciences. In several of these investments he serves on the board, advisory board, or as a board observer. Andrew also currently serves as an Entrepreneur-in-Residence with the Houston Technology Center.Previously, Andrew was an executive at Reliant Energy, where he helped transition the company to a fully deregulated electricity market. While at Reliant, Andrew was responsible for all interactive marketing efforts including online advertising, online customer service, online customer acquisition, and the company’s website. Prior to Reliant, Andrew held various management and executive roles with Compaq Computer, including being a member of the start-up team that ultimately led to the iPAQ PDA. Prior to Compaq, Andrew was a consultant with Coopers & Lybrand, focusing on the telecommunications and computer industries. Andrew holds a B.S. with a concentration in entrepreneurship from the Wharton School of the University of Pennsylvania, where he was named both a Benjamin Franklin Scholar and a University Scholar.
- Total investments:
- 7
- Last investment:
- Lead investor:
- 43%
Last updated:
For AI agents: llms.txt
Industries Andrew Clark invests in
Stages Andrew Clark invests in
Countries Andrew Clark invests in
Investment Focus
Industry
- Software 2 (29%)
- Email 1 (14%)
- Medical 1 (14%)
- Computer 1 (14%)
- Hardware 1 (14%)
Stage
- Seed 2 (29%)
- Angel 1 (14%)
- Series A 1 (14%)
- Series B 1 (14%)
- Funding Round 1 (14%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
ITeam
|
iTeam is transforming the way information technology (IT) and audio/video (A/V) installation services are packaged, sold and delivered through a new approach called Service-as-a-Product™ (SaaP™). | $140K / Seed / Jun 01, 2010 | |
|
ITeam
|
iTeam is transforming the way information technology (IT) and audio/video (A/V) installation services are packaged, sold and delivered through a new approach called Service-as-a-Product™ (SaaP™). | $40K / Angel / May 15, 2009 | |
|
ITeam
|
iTeam is transforming the way information technology (IT) and audio/video (A/V) installation services are packaged, sold and delivered through a new approach called Service-as-a-Product™ (SaaP™). | $564K / Angel | |
Quarri Technologies
|
Quarri is a leading provider of on demand web browser information security solutions that secure information and content at the endpoint. Their products give enterprises the ability to extend security controls temporarily to web browsers accessing their web applications, providing information protection and data leakage prevention wherever yourusers are. | $777.3K | |
Wound Care Technologies
|
Wound Care Technologies, a medical technology company, develops and markets external tissue expansion devices for the wound care market. Its DermaClose RC surgical device is a continuous external tissue expander for reducing wound area to facilitate delayed primary closure. The company’s products are used in fasciotomies, delayed primary closures,traumatic injuries, skin cancer removal, scar revision, congenital nevus, dehisced wounds, large lacerations, high tension closures, chronic wounds, excisional wounds, diabetic ulcers, large skin deficits, hard-to-heal wounds, and acute surgical wounds applications. Wound Care Technologies was founded in 2004 and is based in Chanhassen, Minnesota. | $1M / Series B | |
NutshellMail
|
easy-to-read email digest sent on your schedule.NutshellMail was part of the 2009 fbFund Rev incubator program and was acquired by Constant Contact, Inc (NASDAQ: CTCT) in May 2010. | $200K / Seed | |
|
Fusion Mobile
|
Fusion Mobile is a prepaid wireless company focused on the Hispanic population in the Southwestern U.S. | $100K / Series A |
Co-Investors
About The Castell Group
The Castell Group Contacts
| Name | Phone | Socials | |
|---|---|---|---|
|
Andrew Clark
Founder
|
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4 more contacts available
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FAQ
What does Andrew Clark invest in?
Andrew Clark invests primarily in Software, Email and Medical startups, most often at Seed and Angel stage. Most of the 7 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 Andrew Clark last invest?
The most recent investment recorded for Andrew Clark closed in Jun 2010. Shizune tracks 7 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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