Miami International (MIAX) insider buying
7 open-market purchases of MIAX by Miami International's executives and directors since August 2025, worth $2M in total, from SEC Form 4 filings.
The most recent: Gilbert Ray Cisneros, Jr. bought — on March 20, 2026.
The biggest buyer over the period is Murray Stahl: 4 purchases, $2M.
By year
| Year | Purchases | Value |
|---|---|---|
| 2026 | 4 | $312,336 |
| 2025 | 3 | $1M |
Biggest buyers
| Insider | Buys | Value |
|---|---|---|
| Murray Stahl | 4 | $2M |
| Gilbert Ray Cisneros, Jr. | 3 | $0 |
Every purchase
Newest first. From SEC Form 4 filings. Insider buying across the market.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Mar 20, 2026 | Gilbert Ray Cisneros, Jr. |
0 | $39.17 | — | — |
| Mar 20, 2026 | Gilbert Ray Cisneros, Jr. |
0 | $39.17 | — | — |
| Mar 20, 2026 | Gilbert Ray Cisneros, Jr. |
0 | $39.17 | — | — |
| Mar 4, 2026 | Murray Stahl |
7,200 | $43.38 | $312,336 | Form 4 |
| Oct 3, 2025 | Murray Stahl |
2 | $41.97 | $84 | Form 4 |
| Sep 26, 2025 | Murray Stahl |
4 | $41.76 | $167 | Form 4 |
| Aug 28, 2025 | Murray Stahl |
34,470 | $36.10 | $1M | Form 4 |
Questions
Are Miami International insiders buying the stock?
7 open-market purchases of MIAX by Miami International's executives and directors since August 2025, worth $2M in total, from SEC Form 4 filings. The most recent: Gilbert Ray Cisneros, Jr. bought — on March 20, 2026.
What counts as insider buying here?
Open-market purchases (Form 4 code P) by officers and directors. Option exercises, grants and purchases by 10% owners are left out.
From Miami International's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.