# Brian L. Butler

> Brian L. Butler is a Series B investor at Questa Capital Management backing Software and Analytics. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Questa Capital Management](https://shizune.co/investors/profile/questa-capital-management)
- Location: San Francisco, United States
- Total investments: 2
- Last investment: Jun 2025
- Lead investor: 100%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/brian-butler-38146430

Brian L. Butler is a Series B investor at Questa Capital Management in San Francisco focused on Software and Analytics. Brian L. Butler - Vice President @ Questa Capital Management

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 1 | 50% |
| Analytics | 1 | 50% |
| Health Care | 1 | 50% |
| Machine Learning | 1 | 50% |
| Artificial Intelligence | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| EnsoData | EnsoData is a startup that utilizes artificial intelligence to analyze the human body to diagnose health conditions. EnsoData, whose software uses machine learning algorithms to help clinicians score sleep data and diagnose patients with sleep apnea and other disorders, has now realized that dream—and then some. EnsoData's autoscoringalgorithm combines AASM scoring best practices with cutting edge machine learning algorithms that learn and adapt to every single patient. | $20M | Series B | Jun 25, 2025 |  |
| Eximis Surgical | Eximis Surgical is developing an enabling technology that allows surgeons to quickly remove large specimens through small incisions. Its technology uses RF energized cutting wires temporarily held in place within a containment bag. It was founded in 2014 and headquartered in Louisville, Colorado. | $15.3M | Venture - Series Unknown | Apr 24, 2023 |  |

2 of 2 investments shown.

## Co-investors
- [Inspire Medical Systems](https://shizune.co/investors/profile/inspire-medical-systems) — VC Fund, 1 deal together
- [Olympus Corporation](https://shizune.co/investors/profile/olympus-corporation) — VC Fund, 1 deal together
- [Supermoon Capital](https://shizune.co/investors/profile/supermoon-capital) — VC Fund, 1 deal together
- [Venture Investors](https://shizune.co/investors/profile/venture-investors) — VC Fund, 1 deal together
- [Zetta Venture Partners](https://shizune.co/investors/profile/zetta-venture-partners) — VC Fund, 1 deal together

## About Questa Capital Management

VC Fund · San Francisco, United States

Questa Capital Management is a healthcare venture growth equity firm investing in breakout growth companies.

5 contacts available at Questa Capital Management.

| Name | Title | Profile |
| --- | --- | --- |
| Aabed Meer | Partner | https://shizune.co/investors/profile/aabed-meer |
| Bradley Sloan | Managing Partner | https://shizune.co/investors/profile/brad-sloan |
| Bradley Sloan | Managing Partner | https://shizune.co/investors/profile/bradley-sloan |
| Brian L. Butler | Vice President | https://shizune.co/investors/profile/brian-l-butler |
| Ryan Drant | Founder & Managing Partner | https://shizune.co/investors/profile/ryan-drant |

## Similar investors

### Similar stage
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund
- [FJ Labs](https://shizune.co/investors/profile/fj-labs) — VC Fund

## FAQ

### What does Brian L. Butler invest in?

Brian L. Butler invests primarily in Software, Analytics and Health Care startups, most often at Series B stage. Most of the 2 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Brian L. Butler last invest?

The most recent investment recorded for Brian L. Butler closed in Jun 2025. Shizune tracks 2 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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