# Winston Fu

> Winston Fu is a Series B investor at LDV Partners backing Manufacturing and CleanTech. See 10 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [LDV Partners](https://shizune.co/investors/profile/ldv-partners)
- Location: San Francisco, United States
- Total investments: 10
- Last investment: Mar 2015
- Lead investor: 20%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/winston-fu-3923358

Winston Fu is a Series B investor at LDV Partners in San Francisco focused on Manufacturing and CleanTech. General Partner at U.S. Venture Partners (USVP).

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Manufacturing | 3 | 30% |
| CleanTech | 2 | 20% |
| Electronics | 2 | 20% |
| Energy | 1 | 10% |
| Battery | 1 | 10% |

24 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series B | 4 | 40% |
| Series C | 3 | 30% |
| Series D | 1 | 10% |
| Series E | 1 | 10% |
| Debt Financing | 1 | 10% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Vidder | Vidder's Trusted Access Control technology mitigates network-based attacks by making servers invisible to everyone except authorized users. Vidder offers managed services that protect high-value networked assets. Vidder's unique solution is based on a new standard called the Software-Defined Perimeter (SDP) that is being developed bythe Cloud Security Alliance.It was incorporated in 2009 and is based in Campbell, California. | $12M | Series B | Mar 19, 2015 |  |
| Box | Box is an online file sharing and cloud content management service offering unlimited storage, custom branding, and administrative controls. Box provides more than 8 million users with secure cloud content management and collaboration. Box platform "allows personal and commercial content to be accessible, sharable, and storable in any formatfrom anywhere." It also helps businesses of all sizes in every industry securely access and manages their critical information in the cloud. | $25M | Series E | Jan 29, 2013 |  |
| Redwood Systems | Redwood Systems' LED lighting system architecture helps customers reduce energy costs while providing a degree of control and automation of commercial lighting never before possible. | $11.8M | Series C | May 30, 2012 |  |
| LineStream Technologies | LineStream Technologies provides control technology and software solutions that improve the performance of automated products and processes. Its software into products ranging from washing machines to sophisticated manufacturing equipment. LineStream Technologies was founded in 2008 and headquartered in Cleveland, Ohio. | $5M | Series B | Mar 12, 2012 |  |
| Contour Energy | Contour Energy is a company of portable power that commercializes customizable battery technologies for a wide range of cross-industry applications. It designs its next-generation battery systems to deliver unprecedented improvements in energy and power density, and are capable of performing in extreme operating conditions at significantly improvedcosts. Founded through the collaboration of Caltech and CNRS, the French National Center for Scientific Research, It combines expertise in nano-materials science, patented fluorine-based battery chemistries and manufacturing processes to significantly advance the state of portable power. With its headquarters in Azusa in California, a team of battery industry leaders from Caltech, Energizer, General Electric, Hewlett-Packard, Sanyo and Valence Technologies manages it. Private entrepreneurs hold it. | $20M | Series C | Oct 06, 2011 |  |
| Active-Semi International Inc. | Founded in Silicon Valley and headquartered in the Dallas, Texas metroplex, Active-Semi is a rapidly emerging leader in multi-billion-dollar power management and intelligent motor drive IC markets. The company’s portfolio of analog and mixed signal SoCs provide scalable core platforms used in charging, powering and embedded digital control systemsfor industrial, commercial and consumer applications. Active-Semi offers Power Application Controllers® (PAC®) and Programmable Analog ICs that significantly reduce solution size and cost, improve system reliability, and shorten system development cycle-time. Active-Semi International Inc. is a multi-national Cayman Island corporation backed by leading Venture Capital firms, including USVP, Tenaya Capital, and LDV Partners, with over 170 patents granted and pending. | $6M | Debt Financing | Jun 15, 2011 |  |
| Box | Box is an online file sharing and cloud content management service offering unlimited storage, custom branding, and administrative controls. Box provides more than 8 million users with secure cloud content management and collaboration. Box platform "allows personal and commercial content to be accessible, sharable, and storable in any formatfrom anywhere." It also helps businesses of all sizes in every industry securely access and manages their critical information in the cloud. | $48M | Series D | Feb 24, 2011 |  |
| Redwood Systems | Redwood Systems' LED lighting system architecture helps customers reduce energy costs while providing a degree of control and automation of commercial lighting never before possible. | $15M | Series B | Oct 13, 2010 |  |
| Box | Box is an online file sharing and cloud content management service offering unlimited storage, custom branding, and administrative controls. Box provides more than 8 million users with secure cloud content management and collaboration. Box platform "allows personal and commercial content to be accessible, sharable, and storable in any formatfrom anywhere." It also helps businesses of all sizes in every industry securely access and manages their critical information in the cloud. | $15M | Series C | Apr 07, 2010 |  |
| Contour Energy | Contour Energy is a company of portable power that commercializes customizable battery technologies for a wide range of cross-industry applications. It designs its next-generation battery systems to deliver unprecedented improvements in energy and power density, and are capable of performing in extreme operating conditions at significantly improvedcosts. Founded through the collaboration of Caltech and CNRS, the French National Center for Scientific Research, It combines expertise in nano-materials science, patented fluorine-based battery chemistries and manufacturing processes to significantly advance the state of portable power. With its headquarters in Azusa in California, a team of battery industry leaders from Caltech, Energizer, General Electric, Hewlett-Packard, Sanyo and Valence Technologies manages it. Private entrepreneurs hold it. | $14.2M | Series B | Feb 24, 2010 |  |

10 of 10 investments shown.

## Co-investors
- [CMEA Capital](https://shizune.co/investors/profile/cmea-capital) — VC Fund, 2 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 2 deals together
- [SLB](https://shizune.co/investors/profile/schlumberger) — VC Fund, 2 deals together
- [Andreessen Horowitz](https://shizune.co/investors/profile/andreessen-horowitz) — VC Fund, 1 deal together
- [Clearvision Ventures](https://shizune.co/investors/profile/clearvision-ventures) — VC Fund, 1 deal together
- [Early Stage Partners](https://shizune.co/investors/profile/early-stage-partners) — VC Fund, 1 deal together

## About LDV Partners

VC Fund · Palo Alto, United States

LDV Partners they provide services for securitization of data and algorithms, robotics and artificial intelligence, precision health, and more.

5 contacts available at LDV Partners.

| Name | Title | Profile |
| --- | --- | --- |
| Heather Lee | Associate | https://shizune.co/investors/profile/heather-lee |
| Wayne Zhang | Partner | https://shizune.co/investors/profile/wayne-zhang-3 |
| ZhiXun Shen | Partner | https://shizune.co/investors/profile/zhixun-shen-2 |
| Winston Fu | Partner | https://shizune.co/investors/profile/winston-fu |
| Winston Fu | Partner | https://shizune.co/investors/profile/dr-winston-fu |

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- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund
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## FAQ

### What does Winston Fu invest in?

Winston Fu invests primarily in Manufacturing, CleanTech and Electronics startups, most often at Series B and Series C stage. Most of the 10 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 Winston Fu last invest?

The most recent investment recorded for Winston Fu closed in Mar 2015. Shizune tracks 10 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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