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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 (68% of deals). Average disclosed round size is $7.1M (across 21 rounds with reported amounts).
Portfolio
24
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
25 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Two Dots | Series A | $19M | Jan 2025 |
 BlueCargo | Series A | $11M | Feb 2023 |
 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 |
 Lunar Outpost | Seed | $12M | May 2022 |
 Barcode | Seed | $2.2M | Feb 2022 |
 Mecho Autotech | Seed | $2.1M | Feb 2022 |
 Destinus | Seed | $29M | Feb 2022 |
| TToch.ai | Series A | $11.8M | Oct 2021 |
 Cyble | Seed | $4M | Jan 2021 |
 Jetpack Aviation | Seed | $2M | Nov 2019 |
 LemonBox | Seed | $2M | Dec 2018 |
 Careerist | Series A | $8M | — |
| Jetpack Aviation | Seed | — | — |
 Heimdal | Seed | $6.4M | — |
 Popl | Unknown | — | — |
 Shipmates | Seed | $2.2M | — |
 BBy | Seed | $150K | — |
 DigiBuild | Pre-Seed | $1.0M | — |
 Plutto | Seed | $650K | — |
 GreaseBoss | Seed | — | — |
 Wibond | Seed | $6M | — |
 HolidayFox | Pre-Seed | — | — |
Top Co-Investors
Y Combinator14 shared
Liquid 2 Ventures3 shared
Draper Associates3 shared
Soma Capital3 shared
Quiet Capital2 shared
Rosecliff2 shared
Trousdale Ventures2 shared
Urban Innovation Fund2 shared
Picus Capital2 shared
Script Capital1 shared
Partech Africa1 shared
Scrum Ventures1 shared
Tectonic Ventures1 shared
Form Ventures1 shared
Tencent Investment1 shared
Alumni Ventures1 shared
True Ventures1 shared
Lightspeed Venture Partners1 shared
Globo Ventures1 shared
Allen & Company LLC1 shared
Last updated: 9 September 2026