# Jeff Tong

> Jeff Tong is a Series A investor at Third Rock Ventures backing Medical and Health Care. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Third Rock Ventures](https://shizune.co/investors/profile/third-rock-ventures)
- Location: Menlo Park, United States
- Total investments: 2
- Last investment: Aug 2023
- Lead investor: 50%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/pub/jeffrey-tong/0/21/120

Jeff Tong is a Partner at Third Rock Ventures. Jeff attended Harvard University.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Medical | 1 | 50% |
| Health Care | 1 | 50% |
| Life Science | 1 | 50% |
| Biotechnology | 1 | 50% |

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 1 | 50% |
| Series B | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Rapport Therapeutics | Rapport Therapeutics operates as a clinical-stage biotechnology company, that discovers and develops precision medicines for neurological disorders. Rapport Therapeutics describes relationships that are defined by understanding, communication, teamwork, and trust. | $150M | Series B | Aug 23, 2023 |  |
| Rapport Therapeutics | Rapport Therapeutics operates as a clinical-stage biotechnology company, that discovers and develops precision medicines for neurological disorders. Rapport Therapeutics describes relationships that are defined by understanding, communication, teamwork, and trust. | $100M | Series A | Mar 07, 2023 |  |

2 of 2 investments shown.

## Co-investors
- [Johnson & Johnson Innovation](https://shizune.co/investors/profile/johnson-johnson-innovation-jjdc) — VC Fund, 2 deals together
- [ARCH Venture Partners](https://shizune.co/investors/profile/arch-venture-partners) — VC Fund, 1 deal together
- [Cormorant Asset Management](https://shizune.co/investors/profile/cormorant-asset-management) — VC Fund, 1 deal together
- [Fidelity](https://shizune.co/investors/profile/fidelity-management-and-research-company) — VC Fund, 1 deal together
- [Goldman Sachs Asset Management](https://shizune.co/investors/profile/goldman-sachs-asset-management) — VC Fund, 1 deal together
- [Logos Capital](https://shizune.co/investors/profile/logos-capital) — VC Fund, 1 deal together

## About Third Rock Ventures

VC Fund · Boston, United States

Third Rock Ventures invests in transformational life science companies that show high growth potential and are well-positioned to make a difference in the marketplace. Third Rock Ventures believes in the companies we start and makes significant initial investments, which are frequently supplemented by strategic collaborations, to help our firmsprogress in life-changing medicines, technologies, and diagnostics.

5 contacts available at Third Rock Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| Cary Pfeffer | Partner | https://shizune.co/investors/profile/cary-pfeffer |
| Jeff Tong | Partner | https://shizune.co/investors/profile/jeff-tong |
| Jigar Raythatha | Partner | https://shizune.co/investors/profile/jigar-raythatha |
| Mark Levin | Partner | https://shizune.co/investors/profile/mark-levin |
| Reid Huber | Partner | https://shizune.co/investors/profile/reid-huber |

## 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 Jeff Tong invest in?

Jeff Tong invests primarily in Medical, Health Care and Life Science startups, most often at Series A and Series B stage. Most of the 2 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 Jeff Tong last invest?

The most recent investment recorded for Jeff Tong closed in Aug 2023. Shizune tracks 2 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