# Sio Capital Management: portfolio, investments and team > Sio Capital Management is an investment firm based in United States. 1 investment on record, latest Oct 2025. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/sio-capital-management (Millionrounds; every figure on the page links to its filing or article) United States · [Investor](https://millionrounds.com/investors) # Sio Capital Management Last cheque observed Oct 2025. Silence since then is not evidence of inactivity: our sources miss unannounced rounds. Follow Sio Capital Management and see its new cheques in your feed. [Sign up free](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fsio-capital-management) Quiet Investment firm Health Care Cheques on record **0%** of best year **0** **cheques in 12 months**, 1 on record Since the last cheque **391** days **00** hrs **00** min **00** sec Median round **$18M** Rounds led **1 of 1** Pitch Sio Capital Management ## Sio Capital Management highlights - 01 1 rounds on record - 02 Led 1 rounds ## What they do - **Type:** Investment firm (from a list, unverified) - **Cheque size:** Not stated - **Sectors:** Health Care - **Based in:** New York, United States - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **1 appearances** - **2025** 1 round - **Oct** **[QT Imaging](https://millionrounds.com/company/qt-imaging)** US · Firms' own news pages **$18M** *Led* 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 Named by the firm itself, on a filing, its Form ADV or its company registration **3 named** JW **Jin Woo Lee** Chief Compliance Officer i Form ADV JZ **Judah Zvi Drillick** Chief Executive Officer i Form ADV MB **Michael Bernard Castor** Managing Member i Form ADV We also hold **13** 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. ## What the register says From the firm's own filings with the SEC, which it must file accurately by law **$1.3B** assets it manages Oct 2026 **Registered** investment adviser full reporting to the SEC - **Legal name:** SIO Capital Management, LLC - **SEC number:** CRD 165989 Funds on its Form ADV **2** private funds, **$710M** in gross assets · filed Mar 2024 - Sio Partners, L.P. *Hedge* 73 investors $432M - Sio Partners Offshore, LTD. *Hedge* 35 investors $278M ## The cheque Median round joined **$18M** the round, not its cheque Led 1 of 1 rounds **100%** - **Sole investor:** Never alone - **Last cheque:** Oct 2025 Cheques by month Led Joined Nov 2023 Oct 2026 **Pitching Sio Capital Management?** 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 *→* ## Recently backed The latest companies Sio Capital Management put money into. [**QT Imaging** $18M · Oct 2025](https://millionrounds.com/company/qt-imaging) ## Quick answers about Sio Capital Management ### What does Sio Capital Management invest in? Sio Capital Management says it invests in Health Care. ### How active is Sio Capital Management? 1 investments on record, 0 of them in the last 12 months, and it led 1. The most recent was in Oct 2025. ### What has Sio Capital Management invested in recently? Its most recent investments on record: QT Imaging (Undisclosed round, Oct 2025). ### How big are Sio Capital Management's cheques? The median round it joins is $18M. ### Is Sio Capital Management investing now? No investments in the last 12 months; the latest was in Oct 2025. ### What kind of investor is Sio Capital Management? Sio Capital Management is an investment firm based in New York, United States. ### How much does Sio Capital Management manage? About $1.3B, as regulatory assets under management (Oct 2026). ### When was Sio Capital Management founded? Sio Capital Management was founded in 2006. ## 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=sio-capital-management) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=sio-capital-management)