# David Wallerstein

> David Wallerstein is a seed investor at Tencent backing Mobile and Health Care. See 13 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Tencent](https://shizune.co/investors/profile/tencent)
- Total investments: 13
- Last investment: Jun 2023
- Lead investor: 31%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/david-w-9ba600/
- X (Twitter): https://twitter.com/dwallerstein
- Website: https://x.com/dwallerstein

David Wallerstein is a seed investor at Tencent focused on Mobile and Health Care. David A.M. Wallerstein, SEVP of Tencent. David joined Tencent in 2001. He oversees the Company’s international business initiatives through identifying cooperation with multinational partners and he is responsible for Tencent’s operations outside mainland China. Prior to Tencent, David was the Vice President, Business Development of MIH inChina, and was involved in Internet strategy and mergers and acquisitions activities in China. Prior to that, David worked as a management consultant in China's telecommunications and IT industries.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1.6M–$5.8M |
| Series B | $11M–$90M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Mobile | 3 | 23% |
| Health Care | 2 | 15% |
| Artificial Intelligence | 2 | 15% |
| Video | 1 | 8% |
| Gaming | 1 | 8% |

22 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 31% |
| Series B | 3 | 23% |
| Series A | 1 | 8% |
| Series C | 1 | 8% |
| Debt Financing | 1 | 8% |

7 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 3 | 23% |
| Israel | 1 | 8% |
| Germany | 1 | 8% |
| Iceland | 1 | 8% |
| Nigeria | 1 | 8% |

6 countries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Reask | Reask is a science and technology company that focuses on natural hazard modeling. Reask offers real-time, post-event, and longer-term AI solutions for global weather-related catastrophes by Global Risk mapping and probabilistic trend forecasting of catastrophe risk analytics. | $4.6M | Seed | Jun 15, 2023 |  |
| Lilium | Lilium is an aviation company developing an emissions-free regional air mobility service. It has designed and prototyped the Lilium Jet, a brand-new type of aircraft that will enable it to deliver regional journeys that are considerably faster than rail or road, yet competitive in price. The demonstrator aircraft first flew in 2019 and is afive-seater, fully-electric aircraft that can take-off and land vertically (VTOL). | $119M | Post-IPO Equity | Nov 23, 2022 |  |
| Reask | Reask is a science and technology company that focuses on natural hazard modeling. Reask offers real-time, post-event, and longer-term AI solutions for global weather-related catastrophes by Global Risk mapping and probabilistic trend forecasting of catastrophe risk analytics. |  | Seed | Jan 19, 2022 |  |
| Phytech | Phytech provides growers with a decision support service to increase their yields and to optimize irrigation. The service is based on innovative plant sensors which monitor the plant's growth in real-time and provide the grower critical alerts through the web and mobile applications. | $23.5M | Series C | Sep 22, 2020 |  |
| Lilium | Lilium is an aviation company developing an emissions-free regional air mobility service. It has designed and prototyped the Lilium Jet, a brand-new type of aircraft that will enable it to deliver regional journeys that are considerably faster than rail or road, yet competitive in price. The demonstrator aircraft first flew in 2019 and is afive-seater, fully-electric aircraft that can take-off and land vertically (VTOL). | $240M | Venture - Series Unknown | Mar 23, 2020 |  |
| Reliance Health | Reliance Health is a healthcare company using technology to make healthcare more affordable and accessible. Using an integrated approach that includes affordable health insurance, telemedicine, and a combination of partner and proprietary healthcare facilities. | $6M | Series A | Jan 01, 2020 |  |
| Phytech | Phytech provides growers with a decision support service to increase their yields and to optimize irrigation. The service is based on innovative plant sensors which monitor the plant's growth in real-time and provide the grower critical alerts through the web and mobile applications. | $11M | Series B | Sep 28, 2017 |  |
| Teatime Games | Teatime Games is an Iceland-based gaming startup that reinvents social games. | $1.6M | Seed | Sep 27, 2017 |  |
| Lilium | Lilium is an aviation company developing an emissions-free regional air mobility service. It has designed and prototyped the Lilium Jet, a brand-new type of aircraft that will enable it to deliver regional journeys that are considerably faster than rail or road, yet competitive in price. The demonstrator aircraft first flew in 2019 and is afive-seater, fully-electric aircraft that can take-off and land vertically (VTOL). | $90M | Series B | Sep 05, 2017 |  |
| Reliance Health | Reliance Health is a healthcare company using technology to make healthcare more affordable and accessible. Using an integrated approach that includes affordable health insurance, telemedicine, and a combination of partner and proprietary healthcare facilities. | $2.3M | Seed | Mar 31, 2017 |  |

10 of 13 investments shown.

## Co-investors
- [SV Angel](https://shizune.co/investors/profile/sv-angel) — VC Fund, 3 deals together
- [Atomico](https://shizune.co/investors/profile/atomico) — VC Fund, 2 deals together
- [Hawktail Management](https://shizune.co/investors/profile/hawktail-management) — VC Fund, 2 deals together
- [LGT Capital Partners](https://shizune.co/investors/profile/lgt-capital-partners) — VC Fund, 2 deals together
- [Syngenta Ventures](https://shizune.co/investors/profile/syngenta-ventures) — VC Fund, 2 deals together
- [Tencent](https://shizune.co/investors/profile/tencent) — VC Fund, 2 deals together

## About Tencent

VC Fund · Shenzhen, China

Tencent is an internet service portal offering value-added internet, mobile, telecom, and online advertising services. Its communications and social platforms Weixin and QQ connect users with each other, with digital content and daily life services in just a few clicks. Tencent has maintained steady growth under its user-oriented operatingstrategies. It provides value-added internet, mobile, and telecom services, as well as online advertising under the strategic goal of providing users with "one-stop online lifestyle services." Tencent’s Internet platforms in China – QQ (QQ Instant Messenger), WeChat, QQ.com, QQ Games, Qzone, 3g.QQ.com, SoSo, PaiPai, and Tenpay – aim to address the various needs of internet users, including communication, information, entertainment, e-commerce, and others.In September 2013, Tencent's market valuation rose to $101 billion, and as of November 21, 2013, QQ had 2 billion active users and WeChat had 650 million monthly active users. The numbers of active users for QQ mail, Qzone, Tencent Weibo, and QQ news were 274 million, 626 million, 220 million, and 150 million, respectively.Tencent was founded in November of 1998. In April 2000, the IDG and PCCW invested a total of $2.2 million dollars in the company. Tencent was listed on the Hong Kong Stock Exchange (SEHK) on June 16, 2004. Baidu, Alibaba, and Netease are Tencent's major competitors.

5 contacts available at Tencent.

| Name | Title | Profile |
| --- | --- | --- |
| Hongwei Chen | Executive Director of Investment | https://shizune.co/investors/profile/hongwei-chen |
| Iain Bruce | Non-Executive Member of the Board of Directors | https://shizune.co/investors/profile/iain-ferguson-bruce |
| James Mitchell | Chief Strategy Officer and Senior Executive Vice President | https://shizune.co/investors/profile/james-mitchell-1a2b |
| Jonathan Mailoa | Principal Researcher | https://shizune.co/investors/profile/jonathan-mailoa |
| Levin Yao | Managing Director, Tencent Investment | https://shizune.co/investors/profile/levin-yao |

## Similar investors

### Similar industry
- [SOSV](https://shizune.co/investors/profile/sosv) — VC Fund
- [Animoca Brands](https://shizune.co/investors/profile/animoca-brands-corporation) — VC Fund
- [BITKRAFT Ventures](https://shizune.co/investors/profile/bitkraft-ventures) — VC Fund

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

### Similar country
- [New Business Venture Fund](https://shizune.co/investors/profile/new-business-venture-fund) — VC Fund
- [Frumtak Ventures](https://shizune.co/investors/profile/frumtak) — VC Fund
- [Brunnur Ventures](https://shizune.co/investors/profile/venture-capital-fund-brunnur) — VC Fund

## Featured in investor lists
- [Gaming Angel Investors in Iceland](https://shizune.co/investors/gaming-angel-investors-iceland)
- [Gaming Investors in Iceland](https://shizune.co/investors/gaming-investors-iceland)
- [All Angel Investors in Iceland](https://shizune.co/investors/angel-investors-iceland)
- [All Investors in Iceland](https://shizune.co/investors/investors-iceland)
- [SaaS Angel Investors in Iceland](https://shizune.co/investors/saas-angel-investors-iceland)

## FAQ

### What does David Wallerstein invest in?

David Wallerstein invests primarily in Mobile, Health Care and Artificial Intelligence startups, most often at Seed and Series B stage. Most of the 13 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 David Wallerstein's check size?

David Wallerstein typically joins rounds of $1.6M–$5.8M at Seed and $11M–$90M 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 David Wallerstein participates in.

### When did David Wallerstein last invest?

The most recent investment recorded for David Wallerstein closed in Jun 2023. Shizune tracks 13 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.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co