Verified 10 Nov 2026
Third Security, LLC
Third Security, LLC is a Radford, Virginia firm that oversees a group of operating biotechnology companies and also acts as a family office. Its founder, who started out as a lawyer in Southwest Virginia, launched it in 1999 to manage personal investments, and it wound up its last life-science venture funds in December 2020. In January 2020 an affiliate it manages bought most of Precigen's bioengineering assets, including Oxitec and GreenVenus.
- Type
- Single family office
- Location
- Radford, Virginia, United States
- Sectors
- Healthtech and life sciences, Biotech, Public equities, Direct investments
- Fund size / AUM
- $241M 13F holdings (Q3 2022)
- Latest fund or filing
- 10 Nov 2022
- Website
- thirdsecurity.com
Contacts on file
For Third Security, LLC, the paid file holds: 1 named decision-maker with roles.
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Sources
- thirdsecurity.com/
- www.sec.gov/Archives/edgar/data/1542294/000114036122040912/
- www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1542294&type=13F-HR
- www.sec.gov/Archives/edgar/data/1830210/000183021023000071/bhil-20221231.htm
- www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1542294
- thirdsecurity.com/our-story/
Last checked 10 Nov 2026. Is something wrong? Tell us.
Appears in 9 lists
US family offices that invest in healthcare (28)Family offices that invest in healthcare (45)Family offices in the Southeast (72)US family offices that invest in direct deals in private companies (90)Family offices that invest in direct deals in private companies (143)Family offices that invest in public equities (274)Single family offices in the United States (288)Family offices in the United States (481)Single family offices (488)