Miramontes’ 13F Grows, But Key Data Is Missing

Incomplete Data Masks Portfolio Activity

Miramontes Capital, LLC reported a 11.33% increase in its 13F portfolio value for the period ending June 30, 2026, yet the filing’s utility is severely limited by the absence of position-level detail. The institution disclosed a total portfolio value of $321.3 million, up from $288.6 million in the previous quarter, and reported a holdings count of 141, an increase from 122 positions. However, the filing contains zero detail rows, meaning the specific transactions, new positions, exits, and weight changes that drove this growth remain entirely undisclosed.

Portfolio Value Grows Despite Reporting Gaps

The reported increase in assets under management reflects a combination of market appreciation and potential trading activity, but without share-count data, it is impossible to distinguish between the two. The portfolio became more complex, adding 19 positions to its count, but the concentration of these holdings is unknown. Typically, 13F filings require detail for positions exceeding 10,000 shares or $200,000 in value; the complete lack of detail suggests either that all holdings fell below these thresholds or that the filing was submitted with minimal disclosure. The portfolio’s direction—whether it moved toward greater concentration in a few large bets or diversified into a broader array of smaller positions—cannot be determined from this report.

What the Next Filing Must Confirm

The next filing, expected for the period ending September 30, 2026, will be critical for understanding Miramontes Capital’s strategy. Investors should look for:

• Confirmation of whether the 19 new positions are material holdings or small-cap additions.
• Identification of any positions that were exited or significantly reduced in the current period.
• Clarity on the top 10 holdings and their respective portfolio weights.
• Whether the growth in portfolio value was driven by a few large performers or broad-based gains.
• Verification of any changes in the firm’s investment style or sector allocation.

Form 13F is a delayed report of equity positions as of the end of the quarter. It does not capture transactions occurring after the quarter-end, short positions, or certain derivatives. The absence of detail in this filing limits its immediate analytical value.