# Sujit Banerjee

> Sujit Banerjee is a Series A investor at K1 Investment Management backing Energy and Chemical. See 7 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [K1 Investment Management](https://shizune.co/investors/profile/k1-capital)
- Location: Menlo Park, United States
- Total investments: 7
- Last investment: Mar 2011
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/sujit-banerjee-76b3

Sujit Banerjee is a Series A investor at K1 Investment Management in Menlo Park focused on Energy and Chemical. Sujit Banerjee is the Managing Director at K1.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 1 | 14% |
| Chemical | 1 | 14% |
| Semiconductor | 1 | 14% |
| Energy Storage | 1 | 14% |
| Nanotechnology | 1 | 14% |

9 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 2 | 29% |
| Series B | 2 | 29% |
| Series C | 1 | 14% |
| Series D | 1 | 14% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| NexPlanar | NexPlanar builds chemical mechanical planarization (CMP) pads for the semiconductor device industry. Their propriety nano-domain technology coupled with patented molded grooves and the unique ability to tune the pads results in dramatically improved yields and lower cost of ownership with extended pad life.The company manufactures in Hopkins,Minnesota and at its new headquarters in Hillsboro, Oregon. | $10M | Series D | Mar 31, 2011 |  |
| sliceX | SliceX started as design house in 1996 and established itself as a leading provider of high performance, low power analog and mixed signal ICs and IP services. SliceX owns over 200 silicon-proven analog function blocks that can be used to deliver high-value analog IC solutions. SliceX ICs have targeted a diverse range of applications — consumer,communication, imaging, industrial and medical. | $15M | Series B | Aug 08, 2008 |  |
| NexPlanar | NexPlanar builds chemical mechanical planarization (CMP) pads for the semiconductor device industry. Their propriety nano-domain technology coupled with patented molded grooves and the unique ability to tune the pads results in dramatically improved yields and lower cost of ownership with extended pad life.The company manufactures in Hopkins,Minnesota and at its new headquarters in Hillsboro, Oregon. | $14.5M | Series C | Apr 09, 2008 |  |
| Imergy Power Systems | Imergy Power Systems, Inc. is a cleantech company dedicated to developing and manufacturing electrical energy storage systems.The company’s Energy Storage Platform (ESP) provides a solution to reduce energy cost and optimize renewable power generation while improving overall power reliability. It also offers L-Cell, a novel battery technologydeveloped as a potential energy storage method for long-term space flights.Founded in 2004, Imergy Power Systems is based in Fremont, California. | $15M | Series B | Jan 07, 2008 |  |
| Imergy Power Systems | Imergy Power Systems, Inc. is a cleantech company dedicated to developing and manufacturing electrical energy storage systems.The company’s Energy Storage Platform (ESP) provides a solution to reduce energy cost and optimize renewable power generation while improving overall power reliability. It also offers L-Cell, a novel battery technologydeveloped as a potential energy storage method for long-term space flights.Founded in 2004, Imergy Power Systems is based in Fremont, California. | $15M | Series B | Jan 07, 2008 |  |
| Imergy Power Systems | Imergy Power Systems, Inc. is a cleantech company dedicated to developing and manufacturing electrical energy storage systems.The company’s Energy Storage Platform (ESP) provides a solution to reduce energy cost and optimize renewable power generation while improving overall power reliability. It also offers L-Cell, a novel battery technologydeveloped as a potential energy storage method for long-term space flights.Founded in 2004, Imergy Power Systems is based in Fremont, California. |  | Series A | Sep 18, 2006 |  |
| NexPlanar | NexPlanar builds chemical mechanical planarization (CMP) pads for the semiconductor device industry. Their propriety nano-domain technology coupled with patented molded grooves and the unique ability to tune the pads results in dramatically improved yields and lower cost of ownership with extended pad life.The company manufactures in Hopkins,Minnesota and at its new headquarters in Hillsboro, Oregon. | $9M | Series A | Mar 01, 2004 |  |

7 of 7 investments shown.

## Co-investors
- [Intel Capital](https://shizune.co/investors/profile/intel-capital) — VC Fund, 3 deals together
- [Element Partners](https://shizune.co/investors/profile/element-partners) — VC Fund, 2 deals together
- [Finaventures](https://shizune.co/investors/profile/finaventures) — VC Fund, 2 deals together
- [InterWest Partners](https://shizune.co/investors/profile/interwest-partners) — VC Fund, 2 deals together
- [SmartForest Ventures](https://shizune.co/investors/profile/smartforest-ventures) — VC Fund, 2 deals together
- [BlueRun Ventures](https://shizune.co/investors/profile/bluerun-ventures) — VC Fund, 1 deal together

## About K1 Investment Management

VC Fund · Manhattan Beach, United States

K1 is a Los Angeles-based private equity firm investing in high-growth private companies across North America. The team has been investing in high-growth software and technology companies for over 20 years and typically invests alongside strong management teams that continue to guide their organizations on a day-to-day basis. K1'sinvestments vary in the level of ownership in order to meet the needs of entrepreneurs and managers. They look to help portfolio companies navigate strategic opportunities such as executive recruitment, external financing, mergers and acquisitions, strategic sales and public offerings.

5 contacts available at K1 Investment Management.

| Name | Title | Profile |
| --- | --- | --- |
| Christian Grant | Senior Vice President | https://shizune.co/investors/profile/christian-grant |
| Hasan Askari | Managing Partner | https://shizune.co/investors/profile/hasan-askari |
| Kellen Haines | Principal | https://shizune.co/investors/profile/kellen-haines |
| Neil Malik | CEO and Managing Partner | https://shizune.co/investors/profile/neil-malik |
| Sujit Banerjee | Managing Director | https://shizune.co/investors/profile/sujit-banerjee |

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

## FAQ

### What does Sujit Banerjee invest in?

Sujit Banerjee invests primarily in Energy, Chemical and Semiconductor 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.

### When did Sujit Banerjee last invest?

The most recent investment recorded for Sujit Banerjee closed in Mar 2011. 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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