Insider · CIK 2079445
Douglas M. Schafer JR
EVP and CIO at Miami International Holdings MIAX
Full history from EDGAR: holdings now, every transaction and Form 144 planned sales
Open-market buys0
Open-market sales10
Bought$0
Sold$15.6M
Every trade, with what the company filed around it
Open-market buys and sales as each Form 4 states them, newest first.
How these figures work
Notes on each row are as each Form 4 states them, next to SEC Tracker's own records of the company's filings and other insiders' buys. Holding after is what the filing reports they held after the trade, with the change in their holding.
| Date | Company | Trade | Value | Holding after | Notes |
|---|---|---|---|---|---|
| Nov 4, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 8,000 sh at $35.00 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Nov 4, 2026. | $280K | 387,414 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Nov 4, 2026. |
| Nov 3, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 40,000 sh at $34.07 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after the company's 10-Q filed Nov 2, 2026. | $1.4M | 387,414 −9% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after the company's 10-Q filed Nov 2, 2026. |
| Oct 22, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 8,000 sh at $35.06 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 20 days after a Form 144 notice of a planned insider sale filed Oct 2, 2026. | $280K | 387,414 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 20 days after a Form 144 notice of a planned insider sale filed Oct 2, 2026. |
| Oct 2, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 40,000 sh at $33.34 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Oct 2, 2026. | $1.3M | 387,414 −9% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Oct 2, 2026. |
| Sep 2, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 48,000 sh at $40.48 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 14 days after a Form 144 notice of a planned insider sale filed Aug 19, 2026. | $1.9M | 387,414 −11% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 14 days after a Form 144 notice of a planned insider sale filed Aug 19, 2026. |
| Aug 4, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 48,000 sh at $45.71 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Aug 4, 2026. | $2.2M | 387,414 −11% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Aug 4, 2026. |
| Jul 2, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 48,000 sh at $41.22 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Jul 2, 2026. | $2M | 387,414 −11% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Jul 2, 2026. |
| Jun 2, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 48,000 sh at $42.84 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 12 days after the company's SCHEDULE 13D/A filed May 21, 2026. | $2.1M | 396,681 −11% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 12 days after the company's SCHEDULE 13D/A filed May 21, 2026. |
| May 4, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 48,000 sh at $47.25 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed May 4, 2026. | $2.3M | 396,681 −11% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed May 4, 2026. |
| Mar 17, 2026 | Miami International Holdings MIAX | Sold (10b5-1) 48,000 sh at $39.74 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Mar 17, 2026. | $1.9M | 396,681 −11% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Mar 17, 2026. |
Open-market trades are Form 4 transaction codes P (purchase) and S (sale). Planned sales are those the filing marks as made under a Rule 10b5-1 plan. A P-code buy at the offering price within a day of the company's FWP, 424B prospectus or offering 8-K is marked Bought in the offering and left out of open-market buy counts and cluster buys. Prices and values are as stated in each Form 4. Stock prices aren't shown on this page. Not investment advice.