MIO Partners, Inc. is an SEC-registered investment adviser based in New York, NY that reports managing 10 hedge funds on Form ADV. It reports $59.6 billion in regulatory assets under management. Its private funds, of all types, hold $27.9 billion in gross assets. Its disclosed U.S. stock holdings returned an estimated +9.9% 2026 YTD through Jun 30 (S&P 500: +9.5%), based on 13F filings. Over a longer period they returned an estimated +9.9% from Q1 2026 to Q2 2026, compared with +9.5% for the S&P 500, based on 13F filings.
- Regulatory assets under management
- $59.6 billionForm ADV Item 5.F
- Gross assets of private funds
- $27.9 billionAll private fund types, Form ADV
- Hedge funds managed
- 1015 private funds in total
- Employees
- 287Form ADV Item 5.A
- Registration
- SEC-registered adviserCRD 108637
- Latest Form ADV
- 10/06/2026Disciplinary disclosures: none reported
Estimated 13F portfolio performance
| Quarter | Est. 13F return | S&P 500 |
|---|---|---|
| Q2 2026 | +14.8% | +14.8% |
| Q1 2026 | -4.3% | -4.6% |
Estimate of the firm's disclosed long U.S. stock portfolio from its quarterly 13F filings, holding each quarter-end portfolio to the next quarter-end at prices implied by all 13F filers. It is a price return before dividends and fees, ignores shorts, options, bonds, cash and trading within the quarter, and is not the return of any fund. Disclosures
Largest disclosed holdings
- SPDR S&P 500 ETF TR$139.6 million
As of 2026-06-30, from 13F filing by MIO Partners, Inc..
Private funds reported on Form ADV (11)
As reported in the adviser's Form ADV filed Oct 11, 2024. Funds also listed from Form D are shown above.
Fund vehicles: feeder funds and single-deal vehicles (3)
Feeder funds invest through a master fund; single-deal vehicles (SPVs, co-investments, series) hold one investment.
From SEC filings. Firm data comes from the SEC's Form ADV data as of Oct 2, 2026; performance estimates come from Form 13F. AltMountain has not verified this information, and it is not an offer, solicitation or recommendation. Full disclosures