InvestorAndreessen Horowitz, also known as a16z, is a prominent venture capital firm based in Silicon Valley, founded in 2009. The firm invests across various sectors, supporting companies from early-stage startups to growth-stage firms.

Venrock is a venture capital firm based in the United States, founded in 1969. It focuses on investing in early-stage and growth-stage technology and healthcare companies.
Online destinations
Where to find this organization online, grouped by who runs each page. A link here does not mean the organization controls it.
Pages the organization runs itself.
Third-party rankings
| Ranking | Edition | Position | Since last edition | Trust | What it measures |
|---|---|---|---|---|---|
| Strebulaev-Jackson Venture Ranking: Top 50 Biotech VC Firms | 2026 | #8 | No prior edition | B | Performance |
Venrock is a venture capital firm that was founded in 1969 as the venture capital arm of the Rockefeller family. Based in the United States, Venrock focuses on investing in early-stage and growth-stage companies primarily in the technology and healthcare sectors. The firm aims to identify innovative companies that have the potential to disrupt existing markets. Notable portfolio companies include Apple, Nest, and PillPack. Venrock partners with entrepreneurs who are tackling significant challenges and aims to build some of the world's most successful companies.
Venrock invests in early-stage and growth-stage companies primarily in the technology and healthcare sectors.
Venrock provides Rockefeller family heritage, long-term perspective, and deep technology/healthcare expertise spanning 55+ years.
Venrock focuses on early-stage and growth-stage investments in technology and healthcare sectors. They look for companies that are addressing significant challenges and have the potential to disrupt existing markets.
Founders can pitch to Venrock by visiting their contact page. They encourage direct outreach and provide a platform for entrepreneurs to submit their proposals.
Venrock's unique heritage as the Rockefeller family venture arm provides a long-term perspective and deep expertise in technology and healthcare. Their focus on partnering with entrepreneurs tackling big, hard problems sets them apart in the venture capital landscape.
Venrock primarily operates in North America, with offices located in Palo Alto and New York City. They focus on investing in companies based in these regions.
Venrock actively engages with its portfolio companies, providing mentorship, operational support, and access to their extensive network. They aim to help founders navigate the complexities of scaling their businesses.
Venrock typically invests between $2 million and $20 million in their portfolio companies, allowing them to support businesses at various stages of growth.
From public sources
Venrock dates its establishment as the Rockefeller family's venture capital arm to 1969.
Source: Venrock official profile evidenceVenrock directs business-plan submissions to the relevant investment team through its team directory.
Source: Venrock official profile evidencePitchBook's public Venrock preview lists Aligned Marketplace with deal date 2026-08-13.
Source: Venrock investment portfolio | PitchBookPitchBook's public Venrock preview lists Korsana Biosciences with deal date 2026-09-07.
Source: Venrock investment portfolio | PitchBookPitchBook's public Venrock preview lists Encoded with deal date 2026-09-09.
Source: Venrock investment portfolio | PitchBookPitchBook's public Venrock preview lists KymaThera with deal date 2026-10-06.
Source: Venrock investment portfolio | PitchBookSuperscout Pro
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