# Derek Rapp

> Derek Rapp is a Series A investor at WeedOut (St Louis) backing Health Care and Biotechnology. See 1 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [WeedOut](https://shizune.co/investors/profile/weedout)
- Location: St Louis, United States
- Total investments: 1
- Last investment: Sep 2016
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/derek-rapp-96434913

Derek Rapp is a Series A investor at WeedOut in St Louis focused on Health Care and Biotechnology. Derek K. Rapp is the Managing Director at RiverVest Venture Partners. Derek K. Rapp attended University of Pennsylvania - The Wharton School.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Health Care | 1 | 100% |
| Biotechnology | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| AnTolRx | At AnTolRx they are approaching the treatment of autoimmune diseases differently–through the development of novel nanoparticle-based therapies to promote antigen-specific immune tolerance. Standard therapies broadly suppress the immune system, inducing side effects that may include life threatening infections and tumors. Thus, there is an unmetclinical need for methods of targeted immune-regulation. Their proprietary drug development approach selectively targets pathogenic immune cells providing a unique tolerogenic signal to induce an anti-inflammatory phenotype and better treat diseases. | $4M | Series A | Sep 08, 2016 |  |

1 of 1 investments shown.

## Co-investors
- [Orion Healthcare Equity Partners](https://shizune.co/investors/profile/orion-healthcare-equity-partners) — VC Fund, 1 deal together
- [Pfizer Venture Investments](https://shizune.co/investors/profile/pfizer-venture-investments) — VC Fund, 1 deal together

## About WeedOut

VC Fund · Ness Ziona, Israel

WeedOut is a biotechnology company focusing on providing weed control solutions. The company’s goal is to reduce the need for toxic herbicides and higher herbicide doses.

4 contacts available at WeedOut.

| Name | Title | Profile |
| --- | --- | --- |
| Derek K. Rapp | Chairman Of The Board (Non-Executive) | https://shizune.co/investors/profile/derek-rapp |
| Derek Rapp | Chairman Of The Board (Non-Executive) | https://shizune.co/investors/profile/derek-k-rapp |
| Efrat Lidor Nili | Co-Founder & Co-CEO | https://shizune.co/investors/profile/efrat-lidor-nili |
| Orly Noivirt-Brik | Co-Founder & Co-CEO | https://shizune.co/investors/profile/orly-noivirt-brik |

## 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 Derek Rapp invest in?

Derek Rapp invests primarily in Health Care and Biotechnology startups, most often at Series A stage. Most of the 1 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 Derek Rapp last invest?

The most recent investment recorded for Derek Rapp closed in Sep 2016. Shizune tracks 1 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