Andreessen Horowitz
Venture firm founded in 2009 by Marc Andreessen and Ben Horowitz that invests in seed, venture and growth-stage technology companies. Its SEC adviser record lists Menlo Park, CA as the main office.
- Type
- Venture capital firm
- Location
- Menlo Park, CA
- Website
- https://a16z.com
- Investment focus
- AI, bio and healthcare, consumer, crypto, enterprise, fintech, games, infrastructure, American dynamism
- Stages
- seed, venture, growth
About
Andreessen Horowitz (a16z) says Marc Andreessen and Ben Horowitz founded it in 2009 on the conviction that software would eat the world. It reports more than $100B under management across multiple funds and describes a platform model, with operating teams in areas such as marketing, talent, legal and policy working alongside its investors. It invests from seed through growth stage. The location shown is the office in its SEC adviser record.
Andreessen Horowitz participated in Sharp Performance's $18 million Series A. The company blog is dated 2026-10-08. Hidden Variable led.
Andreessen Horowitz's American Dynamism practice participated in Longeye's $20 million Series A. N47 led. The company release, dated October 21, 2026, uses that practice name. The round lists it and links it to this page. N47's post confirms the lead and the amount and does not name Andreessen Horowitz.
Funding rounds on RaiseTrack
| Company | Round | Date | Role |
|---|---|---|---|
| Larridin | Series A 2026 | 2026-11-02 | participant |
| Longeye | Series A 2026 | 2026-10-21 | participant |
| Loops | Seed 2026 | 2026-10-12 | lead |
| TypeSafe AI | Series A 2026 | 2026-10-09 | lead |
| Sharp Performance | Series A 2026 | 2026-10-08 | participant |
| Armadin | Series B 2026 | 2026-10-01 | lead |
| Jeeves | Funding 2026 | 2026-09-30 | investor |
Sources
Last verified:
- https://a16z.com/about/
Type: official investor website. Accessed 2026-10-12.
Andreessen Horowitz About page. Source of the 2009 founding by Marc Andreessen and Ben Horowitz, more than $100B under management as of April 30, 2026, the platform model of operating teams, and the line that it invests in seed to venture to growth-stage technology companies across AI, bio and healthcare, consumer, crypto, enterprise, fintech, games, infrastructure and American dynamism. - https://adviserinfo.sec.gov/firm/summary/160489
Type: sec filing. Accessed 2026-10-12.
SEC Investment Adviser Public Disclosure record for Andreessen Horowitz (CRD 160489), read through the IAPD search service. Lists the office at 2865 Sand Hill Road, Menlo Park, CA. - https://www.sharpperformance.com/blog/sharp-series-a
Type: company announcement. Accessed 2026-10-16.
Sharp Performance blog, labeled October 8, 2026. Names Andreessen Horowitz as a participant in the $18 million Series A led by Hidden Variable. - https://buttondown.com/raisetrack/archive/raise-track-update-2026-10-16/
Type: other verified public source. Accessed 2026-10-16.
Raise Track Update for 2026-10-16. Names Andreessen Horowitz as a participant in Sharp Performance's Series A. - https://www.businesswire.com/news/home/20261021359350/en/Longeye-Raises-$20M-Series-A-as-More-Than-50-Justice-Agencies-Adopt-Its-AI-Investigative-Platform
Type: funding announcement. Accessed 2026-10-22.
Longeye release, October 21, 2026. The wire text was read through the Yahoo Finance copy, which links to this Business Wire URL. Says the $20 million Series A was led by N47, with participation from Andreessen Horowitz's American Dynamism practice. - https://buttondown.com/raisetrack/archive/raise-track-update-2026-10-22/
Type: other verified public source. Accessed 2026-10-22.
Raise Track Update for 2026-10-22. Names Andreessen Horowitz's American Dynamism practice as a participant in Longeye's Series A. The round uses that name and links it to this page.