# Weili Dai

> Weili Dai is a Series A investor at Silicon Box (Santa Clara) backing Semiconductor and Software. See 21 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Silicon Box](https://shizune.co/investors/profile/silicon-box)
- Location: Santa Clara, United States
- Total investments: 21
- Last investment: May 2026
- Lead investor: 33%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/weili-dai-72381b22a
- Facebook: https://www.facebook.com/profile.php?id=100017187518372

Weili Dai is a Series A investor at Silicon Box in Santa Clara focused on Semiconductor and Software. Weili Dai is the Co-Founder of Silicon Box. She previously worked at Marvell Technology as a Co-Founder and President. Weili Dai attended the University of California Berkeley.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $2.4M–$51M |
| Series A | $10M–$157M |
| Series B | $13M–$240M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Semiconductor | 5 | 24% |
| Software | 4 | 19% |
| Electronics | 4 | 19% |
| Information Technology | 4 | 19% |
| Manufacturing | 2 | 10% |

28 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 5 | 24% |
| Series B | 5 | 24% |
| Seed | 3 | 14% |
| Venture - Series Unknown | 3 | 14% |
| Series C | 1 | 5% |

6 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 12 | 57% |
| Indonesia | 1 | 5% |
| Singapore | 1 | 5% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Silicon Box | Silicon Box is an advanced OSAT (outsourced semiconductor assembly and testing) services provider, specializing in semiconductor integration. The company is capable of delivering full execution for semiconductor packaging, from initial design to final manufacturing of standard single chip packages to the most sophisticated chiplet-based systems,enabling applications that include AI (artificial intelligence), HPC (high performance computing), EV (electric vehicles), automotive, power management, mobile chipsets and processors, applications processors, radiofrequency, and more. | $155M | Series B | May 12, 2026 |  |
| Silicon Box | Silicon Box is an advanced OSAT (outsourced semiconductor assembly and testing) services provider, specializing in semiconductor integration. The company is capable of delivering full execution for semiconductor packaging, from initial design to final manufacturing of standard single chip packages to the most sophisticated chiplet-based systems,enabling applications that include AI (artificial intelligence), HPC (high performance computing), EV (electric vehicles), automotive, power management, mobile chipsets and processors, applications processors, radiofrequency, and more. | $99.9M | Series B | Aug 05, 2024 |  |
| Silicon Box | Silicon Box is an advanced OSAT (outsourced semiconductor assembly and testing) services provider, specializing in semiconductor integration. The company is capable of delivering full execution for semiconductor packaging, from initial design to final manufacturing of standard single chip packages to the most sophisticated chiplet-based systems,enabling applications that include AI (artificial intelligence), HPC (high performance computing), EV (electric vehicles), automotive, power management, mobile chipsets and processors, applications processors, radiofrequency, and more. | $200M | Series B | Jan 04, 2024 |  |
| Gravel | Gravel is a technology company that makes it simple for you to find qualified and trustworthy construction workers. | $14M | Venture - Series Unknown | Dec 03, 2023 |  |
| Ronbow | Ronbow is a commercial company that distributes, designs, and manufactures a diverse selection of decorative bathing products, including sinks, vanities, medicine cabinets, and more. The company selects the highest-quality hardwood and puts them through a rigorous 10-step finishing process that is finalized with a comprehensive assembly process.Ronbow offers a dynamic and diverse design spectrum to fit any style home, from ultra contemporary to old world traditional. Their versatile designs allow for interchangeable sinks and countertops in wood, glass, stone & ceramic to match any home decor. The company provides options for interchangeable sizes and materials to inspire a truly unique customizable experience.Ronbow was founded by Jason Chen in 2002 and is headquartered in Livermore, CA, USA. | $10M | Series A | Apr 04, 2023 |  |
| Robot Invader | Robot Invader is a game development company that provides a wide range of video games for children and adults. | $5M | Venture - Series Unknown | Mar 20, 2023 |  |
| Nubis Communications | Nubis Communications is a cloud startup company providing services to the electrical and electronic manufacturing industries. The company was founded in 2020 and is based in New York City Metropolitan Area. | $40M | Venture - Series Unknown | Feb 22, 2023 |  |
| Silicon Box | Silicon Box is an advanced OSAT (outsourced semiconductor assembly and testing) services provider, specializing in semiconductor integration. The company is capable of delivering full execution for semiconductor packaging, from initial design to final manufacturing of standard single chip packages to the most sophisticated chiplet-based systems,enabling applications that include AI (artificial intelligence), HPC (high performance computing), EV (electric vehicles), automotive, power management, mobile chipsets and processors, applications processors, radiofrequency, and more. | $156.6M | Series A | Mar 09, 2022 |  |
| Expedera | Expedera provider of scalable neural engine semiconductor IP. | $18M | Series A | Dec 10, 2021 |  |
| Lark | Lark is a developer of chronic disease prevention and management platform used to prevent chronic conditions. The company uses cutting-edge AI combined with human coaches and connected devices to provide real-time, personalized, 24/7 support, and counseling to help users make healthier choices and manage their conditions. Its CDC-recognizedDiabetes Prevention Program, Wellness Program, Diabetes Care Program, and Hypertension Program have 1.5 million users and have demonstrated clinically validated improved health outcomes published in 11 peer-reviewed journals and analyst reports.Lark was founded by Julia Hu and Jeff Zira in 2011 and is headquartered in Mountain View, California. | $100M | Series D | Oct 13, 2021 |  |

10 of 21 investments shown.

## Co-investors
- [BlueRun Ventures](https://shizune.co/investors/profile/bluerun-ventures) — VC Fund, 3 deals together
- [UMC Capital](https://shizune.co/investors/profile/umc-capital) — VC Fund, 3 deals together
- [Celtic House Asia Partners](https://shizune.co/investors/profile/celtic-house-asia-partners) — VC Fund, 2 deals together
- [Franklin Templeton](https://shizune.co/investors/profile/franklin-templeton-investments) — VC Fund, 2 deals together
- [IPD Capital](https://shizune.co/investors/profile/ipd-capital) — VC Fund, 2 deals together
- [King River Capital](https://shizune.co/investors/profile/king-river-investments) — VC Fund, 2 deals together

## About Silicon Box

VC Fund · Singapore, Singapore

Silicon Box is an advanced OSAT (outsourced semiconductor assembly and testing) services provider, specializing in semiconductor integration. The company is capable of delivering full execution for semiconductor packaging, from initial design to final manufacturing of standard single chip packages to the most sophisticated chiplet-based systems,enabling applications that include AI (artificial intelligence), HPC (high performance computing), EV (electric vehicles), automotive, power management, mobile chipsets and processors, applications processors, radiofrequency, and more.

3 contacts available at Silicon Box.

| Name | Title | Profile |
| --- | --- | --- |
| Weili Dai | Co-founder | https://shizune.co/investors/profile/weili-dai |
| Byung Joon Han | CEO | https://shizune.co/investors/profile/byung-joon-han |
| Mike Han | CRO | https://shizune.co/investors/profile/mike-han-174c |

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## FAQ

### What does Weili Dai invest in?

Weili Dai invests primarily in Semiconductor, Software and Electronics startups, most often at Series A and Series B stage. Most of the 21 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Weili Dai's check size?

Weili Dai typically joins rounds of $2.4M–$51M at Seed, $10M–$157M at Series A and $13M–$240M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Weili Dai participates in.

### When did Weili Dai last invest?

The most recent investment recorded for Weili Dai closed in May 2026. Shizune tracks 21 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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