What does Mayfield Fund invest in?
Mayfield Fund invests most often at Series A and Series B (53% of the rounds on record), in sectors such as Bio, Workforce and Lifesciences.

United States · Investor
Last cheque observed Oct 2026; 509 cheques on record.
Deploying nowNew fund $15M, May 2025VC firm
Follow Mayfield Fund and see its new cheques in your feed.Start following
29 cheques in the last 12 months
Mostly Series A and Series B: 53% of its rounds
Sole investor in 47 rounds, median $7.0M
71 exits from the portfolio
Mayfield is an early-stage VC investing $3 billion in AI companies, with 70% of investments made at inception.From their own website
Every round we can evidence, newest first509 appearances
24 rounds
38 rounds
An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.
Named by the firm itself, on a filing, its Form ADV or its company registration9 named
We also hold 22 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.
From the firm's own filings with the SEC, which it must file accurately by law
Who backs their funds
The institutions that put money into its funds, which the firm then invests in companies.Source: the pension's own report, latest Mar 2026.
| Fund | Vintage | Committed |
|---|---|---|
| Mayfield XVII | 2023 | $30M |
| Mayfield Select III | 2023 | $25M |
| Mayfield XVI | 2021 | $30M |
| Mayfield Select II | 2021 | $20M |
| Mayfield XV | 2017 | $28M |
| Mayfield Select | 2017 | $13M |
| Mayfield XIV | 2013 | $25M |
| Fund | Vintage | Committed |
|---|---|---|
| Mayfield Select III, a Delaware Limited Partnership | 2025 | $24M |
| Mayfield XVII, a Delaware Limited Partnership | 2024 | $21M |
Funds they back
Every fund on record that it has committed money to, and the managers who invest it.Source: fund news.
Managers it backs most
Most recent commitments
Companies it backed that were later bought or listed71 in all
The latest 20 here. An exit counts when it came after the firm's first round in the company. From historical deal records.
The investors most often in the same rounds as Mayfield Fund. A count of rooms they were both in, not a relationship either has claimed.
The latest companies Mayfield Fund put money into.
2 episodes naming Mayfield Fund in the title, and 1 more that mention it.

20VC: How To Test The Strength Of Co-Founder Relations, The Dangers Of Raising A Large Series A & Why The Biggest Challenge For Consumer Companies Is Finding The Second Big Hit with Rishi Garg, Partner @ Mayfield Fund
WithRishi Garg
MentionsMayfield FundGoogleHighland Capital+1

20VC: Why We Will See A Big Series B Crunch? Why Proprietary Data Pools & AI Talent Will Be The New Limited Natural Resources? Why Now Is The Closest Thing To A New Normal with Tim Chang, Managing Director @ Mayfield Fund
WithTim Chang

20VC: Rick Marini on Lessons Leant From Naval Ravikant, Why You Need To Make 30 Investments Before You Know What You Are Doing & Why You Have To Earn The Right To Good Dealflow
Mayfield Fund invests most often at Series A and Series B (53% of the rounds on record), in sectors such as Bio, Workforce and Lifesciences.
509 investments on record, 29 of them in the last 12 months, and it led 9. The most recent was in Oct 2026.
Its most recent investments on record: Warp Sciences (Series A, Oct 2026), Numeral (Series C, Sept 2026) and Hang Ten Systems (Seed, Sept 2026).
The median round it joins is $23M. It says it writes cheques of $2.0M to $10M.
Sometimes: it led 9 of its 509 investments on record (2%).
Most of the companies it backs are in the United States (97%).
Yes: it is actively investing, with 29 investments in the last 12 months.
Most often Accel (22 rounds together), Khosla Ventures (18 rounds together) and Y Combinator (17 rounds together).
Find the investors who back rounds like yours, and keep every conversation on one fundraising board.
Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it