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Cathexis Ventures is the venture capital arm of Cathexis Holdings, a single-family office based in Houston, Texas. The firm is a generalist investor focused on seed-stage companies, writing initial checks of $250K–$1M with the ability to follow on up to eight figures.
Their most common stage is seed (74% of deals). Average disclosed round size is $6.3M (across 30 rounds with reported amounts).
Portfolio
34
Fund Size
—
Top Stage
Seed
Last 12 Mo
0
Team
MF
Mark Friday
Managing Director
WH
William Harrison
Founder
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
35 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Two Dots | Series A | $19M | Jan 2025 |
 BlueCargo | Series A | $11M | Feb 2023 |
 Recall | Seed | $2.7M | Dec 2022 |
 Apply Design | Seed | $3.3M | Nov 2022 |
 Firehawk Aerospace | Series B | $15.5M | Sep 2022 |
 Remedial Health | Seed | $4.4M | Sep 2022 |
 Craniometrix | Seed | $6M | Aug 2022 |
 Canix | Seed | $10M | Jun 2022 |
 Lunar Outpost | Seed | $12M | May 2022 |
 BARCODE | Seed | $2.2M | Feb 2022 |
 Mecho | Seed | $2.1M | Feb 2022 |
 Destinus | Seed | $29M | Feb 2022 |
| TToch.ai | Series A | $11.8M | Oct 2021 |
 Cyble | Seed | $4M | Jan 2021 |
 Cyble | Seed | $4M | Jan 2021 |
 Transastra | Seed | $11M | Jan 2021 |
 Jetpack | Seed | $2M | Nov 2019 |
 LemonBox | Seed | $2M | Dec 2018 |
 Careerist | Series A | $8M | — |
| Jetpack | Seed | — | — |
 Heimdal | Seed | $6.4M | — |
 Popl | Unknown | — | — |
 Shipmates | Seed | $2.2M | — |
 Legistify | Series A | $4M | — |
 BBy | Seed | $150K | — |
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Top Co-Investors
Y Combinator20 shared
Soma Capital4 shared
Liquid 2 Ventures3 shared
Draper Associates3 shared
Picus Capital3 shared
Quiet Capital2 shared
Factory2 shared
Rosecliff2 shared
Rebel Fund2 shared
Trousdale Ventures2 shared
Urban Innovation Fund2 shared
Blackbird2 shared
Pioneer Fund2 shared
Space Capital2 shared
Script Capital1 shared
Partech Africa1 shared
Scrum Ventures1 shared
Tectonic Ventures1 shared
Form Ventures1 shared
Tencent Investment1 shared
Last updated: 7 October 2026