MIO Partners, Inc. holds a concentrated book of 1 reported position worth $139.6M as of Q2 2026 (disclosed Aug 5, 2026, a ~36-day 13F lag). Their largest long position is SS SPDR S&P 500 ETF Trust-US at 100% of the reported non-option book. They also disclosed $228.0M in put options (a bearish bet) and $4.0M in call options (bullish), shown separately below and excluded from the non-option book. Cloning the disclosed picks since 2026 would be +11% (+18.1%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 2.3 points over this window.
Growth of $10,000 cloning MIO Partners, Inc.'s disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~36 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: concentrated book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
0% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
No trims or exits this quarter.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | State STR SPDR S&P 500 ETF T TR UNIT | $139.6M | 186.9K | 100.0% | ▲+120% Added · +102K sh |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1535457/holdings"
Use Arkolith to show MIO Partners, Inc.'s latest holdings, largest changes, and filing provenance.
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| PUT · bearish | ISHARES CHINA LARGE-CAP ETFFXI | $165.7M | 52K |
| PUT · bearish | ISHR IBX USD HIYLD CB ETF-UIHYG | $37.4M | 5K |
| PUT · bearish | ISHARES MSCI EMERGING MARKETEEM | $20.9M | 3K |
| CALL · bullish | ISHARES MSCI BRAZIL ETFEWZ | $4.0M | 1K |
| PUT · bearish | ISHARES MSCI BRAZIL ETFEWZ | $4.0M | 1K |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the non-option book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.