# S3 Ventures: portfolio, investments and team > S3 Ventures is a vc firm based in United States. 16 investments on record, 2 in the last 12 months, latest Aug 2026. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/s3-ventures-2 (Millionrounds; every figure on the page links to its filing or article) United States · [Investor](https://millionrounds.com/investors) # S3 Ventures Last cheque observed Aug 2026; 16 cheques on record. Email Deploying now VC firm Seed Series A Series B Sustainable Development Goals Tech For Good Social Impact Follow S3 Ventures and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fs3-ventures-2) Deploying now **100%** of best year **2** **cheques in 12 months**, 16 on record Since the last cheque **73** days **00** hrs **00** min **00** sec Median round **$56M** Cheque size, as they say **$100K – $10M** Rounds led **1 of 16** Sole investor **3 rounds** Exits **5 from the portfolio** Mostly in **United States, 100%** Pitch S3 Ventures ## S3 Ventures highlights - 01 2 cheques in the last 12 months - 02 Mostly Series B and Series A: 56% of its rounds - 03 Sole investor in 3 rounds, median $4.0M - 04 5 exits from the portfolio ## What they do > S3 Ventures is the largest and longest-serving venture capital firm born in Texas and investing nationwide. From their own website - **Type:** VC firm (from a list, unverified) - **Cheque size:** $100K – $10M as they say - **Stages:** Seed Series A Series B Growth Pre-IPO - **Sectors:** Sustainable Development Goals Tech For Good Social Impact - **Based in:** Austin, United States - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **16 appearances** - **2026** 2 rounds - **Aug** **[MaxQ Medical](https://millionrounds.com/company/maxq-medical)** Series A · US · Ventureburn **$32M** *Led* - **Apr** **[Endovascular Engineering, Inc. (“E2”)](https://millionrounds.com/company/endovascular-engineering-inc-e2)** Series C · US · Firms' own news pages **$80M** With 6 others - **2013** 1 round - **Jun** **[TVA Medical](https://millionrounds.com/company/tva-medical)** Series B · US · vcaonline.com **$9.5M** With 2 others - **2012** 2 rounds - **Apr** **[OrthoAccel Technologies](https://millionrounds.com/company/orthoaccel-technologies)** Venture · US · finsmes.com **$10M** With 1 other - **Feb** **[Tango Health](https://millionrounds.com/company/tango-health)** Series B · US · eon.businesswire.com **$4.0M** Sole investor - **2011** 2 rounds - **Aug** **[Kimbia](https://millionrounds.com/company/kimbia)** Series B · US · techcrunch.com **$4.0M** Sole investor - **Apr** **[Digby](https://millionrounds.com/company/digby)** Series C · US · dmwmedia.com **$8.0M** With 3 others - **2010** 5 rounds - **Nov** **[Tango Health](https://millionrounds.com/company/tango-health)** Series A · US · finsmes.com **$3.0M** With 3 others - **Oct** **[StoredIQ](https://millionrounds.com/company/storediq)** Venture · US · freshnews.com **$10M** With 1 other - **May** **[LibreDigital](https://millionrounds.com/company/libredigital)** Series C · US · paidcontent.org **$8.1M** With 2 others - **May** **[Sipera Systems](https://millionrounds.com/company/sipera-systems)** Series D · US · texastechpulse.com **$10M** With 4 others - **Feb** **[Callvine](https://millionrounds.com/company/callvine)** Series A · US · austin.bizjournals.com **$4.0M** Sole investor - **2009** 2 rounds - **Jul** **[Invodo](https://millionrounds.com/company/invodo)** Series B · US · pr.com **$6.0M** With 1 other - **Apr** **[StoredIQ](https://millionrounds.com/company/storediq)** Series C · US · storediq.com **$8.0M** With 1 other - **2008** 1 round - **Jun** **[StoredIQ](https://millionrounds.com/company/storediq)** Series B · US · startupmeme.com **$13M** With 2 others - **2007** 1 round - **Sept** **[Phurnace Software](https://millionrounds.com/company/phurnace-software)** Series A · US · bizjournals.com **$5.0M** With 1 other An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor. ## The team We hold **15** people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them. ## Exits from the portfolio Companies it backed that were later bought or listed **5 in all** **[Digby](https://millionrounds.com/company/digby)** Bought by [Phunware](https://millionrounds.com/fund/phunware) **Undisclosed** May 2014 **[StoredIQ](https://millionrounds.com/company/storediq)** Bought by [IBM (International Business Machines)](https://millionrounds.com/fund/ibm-international-business-machines) **Undisclosed** Dec 2012 **[Sipera Systems](https://millionrounds.com/company/sipera-systems)** Bought by Avaya **Undisclosed** Oct 2011 **[LibreDigital](https://millionrounds.com/company/libredigital)** Bought by RR Donnelley (Nasdaq:RRD) **Undisclosed** Aug 2011 **[Phurnace Software](https://millionrounds.com/company/phurnace-software)** Bought by BMC Software **Undisclosed** Jan 2010 An exit counts when it came after the firm's first round in the company. From historical deal records. ## The cheque Seed Series A Series B Median round joined **$56M** the round, not its cheque Alone, median **$4.0M** Led 1 of 16 rounds **6%** - **Said size:** $100K – $10M - **Sole investor:** 3 rounds - **Last cheque:** Aug 2026 - **Exits:** 5 from the portfolio Rounds by stage said on their site - Series B said *5* - Series A said *4* - Series C *4* - Venture *2* - Series D *1* - Seed said *-* - Growth said *-* Cheques by month Led Joined Dec 2023 Nov 2026 Often in the room with - [Sante Ventures](https://millionrounds.com/fund/sante-ventures) 2 - [Techxas Ventures](https://millionrounds.com/fund/techxas-ventures) 2 **Pitching S3 Ventures?** Put them on your fundraising board with this record on the card, and follow them to hear when they write a new cheque. Add to your CRM *→* ## Who they invest alongside The investors most often in the same rounds as S3 Ventures. A count of rooms they were both in, not a relationship either has claimed. [**Sante Ventures** VC firm **2** rounds together](https://millionrounds.com/fund/sante-ventures)[**Techxas Ventures** Growth equity **2** rounds together](https://millionrounds.com/fund/techxas-ventures) ## Recently backed The latest companies S3 Ventures put money into. [**MaxQ Medical** $32M · Aug 2026](https://millionrounds.com/company/maxq-medical) ## Quick answers about S3 Ventures ### What does S3 Ventures invest in? S3 Ventures invests most often at Series B and Series A (56% of the rounds on record), in sectors such as Sustainable Development Goals, Tech For Good and Social Impact. ### How active is S3 Ventures? 16 investments on record, 2 of them in the last 12 months, and it led 1. The most recent was in Aug 2026. ### What has S3 Ventures invested in recently? Its most recent investments on record: MaxQ Medical (Series A, Aug 2026) and Endovascular Engineering, Inc. (“E2”) (Series C, Apr 2026). ### How big are S3 Ventures's cheques? The median round it joins is $56M. It says it writes cheques of $100K to $10M. ### Does S3 Ventures lead rounds? Sometimes: it led 1 of its 16 investments on record (6%). ### Where does S3 Ventures invest? Most of the companies it backs are in the United States (100%). ### Is S3 Ventures investing now? Yes: it is actively investing, with 2 investments in the last 12 months. ### Who does S3 Ventures invest alongside? Most often Sante Ventures (2 rounds together) and Techxas Ventures (2 rounds together). ## Raising now? Find the investors who back rounds like yours, and keep every conversation on one fundraising board. Find similar investorsOpen your CRM Built from the rounds we watched, its filings and its own website, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections?slug=s3-ventures-2) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=s3-ventures-2)