S3 Ventures is the largest venture capital firm born in Texas, investing nationwide in business technology, digital experiences, and healthcare technology. Founded in 2005 and based in Austin, the firm leads Seed, Series A, and Series B rounds and has raised over $1 billion in total assets under management across eight funds.
Deal activity increased 175% year-over-year (11 deals in the last 12 months). Average disclosed round size is $19.1M (across 92 rounds with reported amounts).
Portfolio
74
Fund Size
$250M
Top Stage
Series A
Last 12 Mo
11
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
95 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Boom | Series A | $15M | Aug 2026 |
| MMaxQ Medical | Series A | $31.5M | Aug 2026 |
 Buildforce | Series A | $10M | Jul 2026 |
| RRapidPulse, Inc. | Series B | $48M | Jul 2026 |
 Vendelux | Series B | — | Jul 2026 |
 Earlytrade | Unknown | $25M | Jun 2026 |
 Endovascular Engineering | Series C | $80M | Apr 2026 |
 Buzz Solutions | Growth | $5M | Jan 2026 |
 Buzzsolutions Co | Unknown | $20M | Jan 2026 |
| Earlytrade | Series A | $25M | Jan 2026 |
| RRapidPulse, Inc. | Series B | $48M | Jan 2026 |
| MMaxQ Medical | Series A | $31.5M | Jan 2026 |
 Cloverleaf AI | Series A | $8M | Jan 2026 |
 Opine | Seed | $5M | Dec 2025 |
 VAHATICOR | Series B | $23M | Nov 2025 |
| VVentureMed Group | Series C | $28M | Oct 2025 |
 Folia Health | Series A | $10.5M | Oct 2025 |
 Nestimate | Seed | $3M | Sep 2025 |
 Databahn AI | Series A | $17M | Jun 2025 |
 Mavvrik | Seed | $6.2M | Feb 2025 |
| Endovascular Engineering | Series B | $42M | Feb 2025 |
 Versa | Series C | $27.3M | Jan 2025 |
| VAHATICOR | Series B | $23M | Jan 2025 |
| Databahn AI | Series A | $17M | Jan 2025 |
 Prokeep | Series A | $25M | Nov 2024 |
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Top Co-Investors
Tensility Venture Partners7 shared
GTMfund6 shared
Techstars6 shared
Valor Equity Partners5 shared
GG14 shared
Menlo Ventures4 shared
M254 shared
Debut Capital4 shared
Backstage Capital4 shared
Y Combinator4 shared
Silverton Partners4 shared
Sierra Ventures3 shared
SJF Ventures3 shared
Knoll Ventures3 shared
Triangle Tweener Fund3 shared
Norwest Venture Partners3 shared
UPMC Enterprises3 shared
Forgepoint Capital3 shared
Chicago Ventures3 shared
Altos Ventures Management, Inc.3 shared
Last updated: 20 October 2026