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Andreessen Horowitz

a16z — Silicon Valley firm founded 2009 by Marc Andreessen and Ben Horowitz. One of the most active backers of AI sta…

Active VC 🇺🇸 United States · Menlo Park, United States · Since 2009
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Portfolio Active
78
Latest Upscale AI
Deal flow
$101.7B
10 rounds
Unicorns
28
≥ $1B valuation
Founded
2009
17 yrs
Latest
Jun 2026
Lassie

About Andreessen Horowitz

a16z — Silicon Valley firm founded 2009 by Marc Andreessen and Ben Horowitz. One of the most active backers of AI startups.

Investment activity

2019–2026
$20.5M
$53M
$272.5M
$1.9B
$18.5B
$40.7B
$39.2B
1
'19
2
'21
2
'22
17
'23
13
'24
42
'25
18
'26

Portfolio

24

Co-investors

8

Recent rounds

10
Jun 3, 2026 Series A $35M Lassie
May 26, 2026 Series B $113M OpenRouter
May 20, 2026 Series D $200M Mercury
May 19, 2026 Seed $10.5M Lead Stilta
May 7, 2026 Series F $1B Kalshi
Apr 9, 2026 Series E $100M Lead Chapter
Apr 1, 2026 Series E Extension $316M Lead Abridge
Mar 25, 2026 Growth $200M Harvey
Mar 11, 2026 Series A $500M Mind Robotics
Mar 5, 2026 Series A $30M Lead Lio