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Heron Rock is an investment platform built by entrepreneurs for entrepreneurs, investing before there is consensus, before there are metrics, and often before there is a product. It is a multi-family office that primarily invests in ecommerce, health tech, and other early-stage ventures, operating on a carried interest model with no management fees.
30% of their portfolio is in Healthcare. Average disclosed round size is $37.2M (across 9 rounds with reported amounts).
Portfolio
8
Fund Size
—
Top Stage
Series A
Last 12 Mo
0
Team
TW
Tom Williams
Founder
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
10 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 ProteinQure | Series A | $11M | May 2025 |
 aifleet | Series B | $16.6M | Jan 2024 |
 Heard | Series A | $15M | Jun 2023 |
 Guava | Pre-Seed | $2.4M | Jul 2022 |
| Guava | Unknown | $2.4M | Jan 2022 |
 Wavepaths | Seed | $4.5M | Nov 2021 |
 Farmstead | Series A | $7.9M | Nov 2020 |
 Grove Collaborative | Series D | $125M | Jan 2020 |
| Grove Collaborative | Series D | $150M | Jan 2019 |
 IrisCX | Pre-Seed | — | — |
Top Co-Investors
AARP2 shared
Precursor Ventures2 shared
Backstage Capital2 shared
Techstars2 shared
NextView Ventures2 shared
Greenspring Associates2 shared
General Atlantic2 shared
MHS Capital2 shared
Lone Pine Capital2 shared
Glynn Capital2 shared
Mayfield Fund2 shared
Norwest Venture Partners2 shared
GGV Capital1 shared
Footwork1 shared
Founders' Co-op1 shared
Act One Ventures1 shared
Headline1 shared
Duro Ventures1 shared
Red Dot Capital Partners1 shared
Maple VC1 shared
Last updated: 20 October 2026