M
Mantaray
Mantaray is a seed to Series C stage investment firm. It has made 8 investments. Average disclosed round size is $32.6M (across 10 rounds with reported amounts).
Portfolio
8
Fund Size
—
Top Stage
Series B
Last 12 Mo
1
Team
LB
Lawrence Barclay
Managing Partner
LV
Leah von Siemens
Partner
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
11 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Alien | Pre-Seed | $7.1M | Jan 2026 |
 Sitehop | Seed | — | Oct 2025 |
 Kadence | Series A | $20M | Jul 2025 |
| Kadence | Series A | $20M | Jan 2025 |
 HelloSelf | Series B | $20M | Mar 2023 |
 Booksy | Series C | $70M | Jan 2021 |
 Ossium Health | Series B | $63M | Jan 2021 |
 Brainly | Series D | $80M | Dec 2020 |
| Brainly | Series B | $15M | Jan 2020 |
| Brainly | Series C | $30M | Jan 2019 |
 Brickwise | Seed | $500K | — |
Top Co-Investors
Manta Ray Ventures5 shared
General Catalyst3 shared
Techstars2 shared
High Alpha2 shared
Runa Capital2 shared
Learn Capital2 shared
Prosus Ventures2 shared
Oxford Capital1 shared
Octopus Ventures1 shared
OMERS Ventures1 shared
Y Combinator1 shared
Yabeo1 shared
Lvna Capital1 shared
Orange DAO1 shared
Transpose1 shared
Juniper Networks1 shared
Pioneer Fund1 shared
Soma Capital1 shared
Finality Capital Partners1 shared
Initialized Capital1 shared
Last updated: 27 September 2026