Medley Partners
VC Fund
San Francisco, United States
Medley Partners is a VC fund in San Francisco focused on Energy and Government. Medley Partners manages private equity investments on behalf of Jim Simons' family and a number of affiliated entities.Founded in 2004, Medley invests primarily in private equity funds, including buyout, growth equity, venture capital, real estate and distressed in the United States, Europe and Asia, and also participates in co-investmentopportunities with the funds where it is invested.The firm employs a diverse investment approach by geography and industry, actively seeking new investments with strong managers and compelling long-term value fundamentals.
- Total investments:
- 7
- Last investment:
- Lead investor:
- 14%
Last updated:
For AI agents: llms.txt
Industries Medley Partners invests in
Stages Medley Partners invests in
Countries Medley Partners invests in
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Brent Whisenant
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Brian S. Schneider
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Edson Maduwura
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1 more contact available
Investment Focus
Industry
- Energy 1 (14%)
- Government 1 (14%)
- Electronics 1 (14%)
- Manufacturing 1 (14%)
Stage
- Series A 1 (14%)
- Series B 1 (14%)
- Series C 1 (14%)
- Series D 1 (14%)
- Series E 1 (14%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Mark Heising
Founder & Managing Director
|
Founder & Managing Director | Total investments: 8 | Find email | |
|
Brent Whisenant
Managing Director
|
Managing Director | Total investments: 0 | Find email | |
|
Brian S. Schneider
Managing Director
|
Managing Director | Total investments: 0 | Find email | |
|
Edson Maduwura
Controller
|
Controller | Total investments: 0 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Siva Power
|
Siva Power develops third-generation thin-film PV technologies which increase solar cell efficiency and reduce manufacturing costs, therefore enabling the commercialization of solar modules that generate electricity at competitive rates without depending on government subsidies. Siva Power was founded in 2006 and headquartered in San Jose,California. | $25M / Series E / May 23, 2017 | |
|
Siva Power
|
Siva Power develops third-generation thin-film PV technologies which increase solar cell efficiency and reduce manufacturing costs, therefore enabling the commercialization of solar modules that generate electricity at competitive rates without depending on government subsidies. Siva Power was founded in 2006 and headquartered in San Jose,California. | $10M / Series D / Jan 29, 2015 | |
|
Siva Power
|
Siva Power develops third-generation thin-film PV technologies which increase solar cell efficiency and reduce manufacturing costs, therefore enabling the commercialization of solar modules that generate electricity at competitive rates without depending on government subsidies. Siva Power was founded in 2006 and headquartered in San Jose,California. | $23M / Series C / Jul 01, 2011 | |
|
Siva Power
|
Siva Power develops third-generation thin-film PV technologies which increase solar cell efficiency and reduce manufacturing costs, therefore enabling the commercialization of solar modules that generate electricity at competitive rates without depending on government subsidies. Siva Power was founded in 2006 and headquartered in San Jose,California. | $41.5M / Series C / Jun 04, 2010 | |
|
Siva Power
|
Siva Power develops third-generation thin-film PV technologies which increase solar cell efficiency and reduce manufacturing costs, therefore enabling the commercialization of solar modules that generate electricity at competitive rates without depending on government subsidies. Siva Power was founded in 2006 and headquartered in San Jose,California. | $18.2M / Series B / Oct 29, 2008 | |
EnLink Geoenergy Services
|
EnLink continues to be an innovative leader in the geothermal heat pump (GHP) industry by virtue of its continuous improvement in the installation of underground loop systems, called Earth Heat Exchangers (EHXs).After 14 years in the business, and with 13 US and international patents to its credit, EnLink has a record of reliability and successin EHX installation that is unsurpassed in the industry. EnLink is committed to total professionalism with its clients, its partners and all the stakeholders who participate in their projects. | $30M / May 19, 2008 | |
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Siva Power
|
Siva Power develops third-generation thin-film PV technologies which increase solar cell efficiency and reduce manufacturing costs, therefore enabling the commercialization of solar modules that generate electricity at competitive rates without depending on government subsidies. Siva Power was founded in 2006 and headquartered in San Jose,California. | $4.3M / Series A / Aug 30, 2007 |
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FAQ
What does Medley Partners invest in?
Medley Partners invests primarily in Energy, Government and Electronics startups, most often at Series A and Series B 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.
How do I contact Medley Partners?
Public channels for Medley Partners include LinkedIn and the website linked on this profile. 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 Medley Partners?
The team at Medley Partners includes Mark Heising (Founder & Managing Director), Brent Whisenant (Managing Director) and Brian S. Schneider (Managing Director). 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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