Position in MIAX
as of Jun 30, 2026
· filed Aug 3, 2026
Position Value
$10,739,240
+$7,576,990 QoQ
Shares Held
289,000
+255.7% QoQ
Ownership
0.291%
of shares outstanding
% of Portfolio
4.05%
of 13F equity value
Holder Rank
#50
of 204 holders
Holding Since
Sep 2025
4 quarters on record
Voting authority
Sole 0%
Shared 0%
None 100%
Common Shares in MIAX Over Time
Shares Held
Position Value (USD)
Position in Capital Markets
Financial Services · as of Jun 30, 2026MAD RIVER INVESTORS holds $10,739,240 across 1 Capital Markets name. MIAX ranks #1 (100.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MIAX |
Miami International Holdings, Inc.
This page
|
289,000 | $10,739,240 |
All Filings in MIAX
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4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $10,739,240 | 289,000 | Shares | Sole | 2026-08-03 | |
| 2026-03-31 | $3,162,250 | 81,250 | Shares | Sole | 2026-04-23 | |
| 2025-12-31 | $3,330,719 | 75,050 | Shares | Sole | 2026-02-06 | |
| 2025-09-30 | $3,003,396 | 74,600 | Shares | Sole | 2025-10-14 | |
| No filing history on record for this holder in this stock. | ||||||