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Person · CIK 2079445

Douglas M. Schafer JR

EVP and CIO at Miami International Holdings

Source: Forms 3, 4, 5 and 144 on SEC EDGAR

Sold on Form 4$15.6M
Noticed on Form 144$15.4M
Bought on Form 4$0
Companies1

Holdings now

As reported after the latest Form 3, 4 or 5 at each company.

How these figures work

Options and RSUs are from the latest filing that lists them; earlier grants may also be held. Holdings can be out of date when a person stops filing.

CompanySecurityHeldShares or unitsAs of
Miami International Holdings MIAXCommon StockDirectly387,414Nov 4, 2026 · Filing · EDGAR
Miami International Holdings MIAXNonqualified Stock Option (Right to Buy)
exercise $12.00, expires Jul 31, 2029, into Common Stock
Directly99,334Nov 4, 2026 · Filing · EDGAR

Sold and noticed by quarter

Douglas M. Schafer JR: dollars sold on Form 4 and noticed on Form 144 per quarter, Q1 2025 to Q4 2026$6.1M$0Q1 2025: $0 noticed on Form 144Q1 2025: $0 sold on Form 4Q2 2025: $0 noticed on Form 144Q2 2025: $0 sold on Form 4Q3 2025: $0 noticed on Form 144Q3 2025: $0 sold on Form 4Q4 2025: $0 noticed on Form 144Q4 2025: $0 sold on Form 4Q1 2026: $5.7M noticed on Form 144Q1 2026: $1.9M sold on Form 4Q2 2026: $0 noticed on Form 144Q2 2026: $4.3M sold on Form 4Q3 2026: $5.6M noticed on Form 144Q3 2026: $6.1M sold on Form 4Q4 2026: $4.1M noticed on Form 144Q4 2026: $3.3M sold on Form 4Q1 2025Q3 2025Q1 2026Q3 2026

Sold (Form 4) Noticed (Form 144) Bought (Form 4)

Quarterly totals as a table
QuarterSold (Form 4)Noticed (Form 144)
Q4 2026$3.3M$4.1M
Q3 2026$6.1M$5.6M
Q2 2026$4.3M—
Q1 2026$1.9M$5.7M

Planned sales (Form 144) and the sales that followed

Each Form 144 notice of a planned sale, grouped by broker and 10b5-1 plan, with the Form 4 sales we matched to it.

How we match

A Form 144 is a notice of a planned sale by an affiliate. SEC Tracker matches each notice to Form 4 sales by the same person at the same company within 90 days of the notice, up to the shares noticed. The match is our inference, not something either filing states.

Notice dateNoticedPlanned saleOutcomeLinks
Miami International Holdings MIAX · Morgan Stanley Smith Barney · 10b5-1 plan adopted Dec 16, 2025 · 3 notices
Oct 2, 2026120,000 · ~$4.1MOct 2, 2026Partly sold Sold 96,000 in 4 sales, Oct 2 to Nov 4 · $3.3M likely match Form 4 (1) · Form 4 (2) · Form 4 (3)Filing · EDGAR
Jul 2, 2026144,000 · ~$5.6MJul 2, 2026Sold as noticed Sold 144,000 in 3 sales, Jul 2 to Sep 2 · $6.1M Form 4 (1) · Form 4 (2) · Form 4 (3)Filing · EDGAR
Mar 17, 2026144,000 · ~$5.7MMar 17, 2026Sold as noticed Sold 144,000 in 3 sales, Mar 17 to Jun 2 · $6.2M Form 4 (1) · Form 4 (2) · Form 4 (3)Filing · EDGAR

Every transaction, by company

Each Form 3, 4 and 5 transaction in plain words, newest first.

How these figures work

Values are shares times the price each filing states; grants, exercises and gifts usually state no price. Held after is what the filing reports was held once the transaction was done, directly or through the named holder.

Miami International Holdings MIAX EVP and CIO · filings 2025 to 2026 · sold $15.6M · $15.4M noticed on Form 144

DateTransactionSharesPriceValueHeld afterSource
Nov 4, 2026Option or RSU exercised or converted+8,000$12.00$96K395,414 directFiling · EDGAR
Nov 4, 2026Sale under a 10b5-1 plan−8,000$35.00$280K387,414 directFiling · EDGAR
Nov 4, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−8,00099,334 directFiling · EDGAR
Nov 3, 2026Option or RSU exercised or converted+40,000$12.00$480K427,414 directFiling · EDGAR
Nov 3, 2026Sale under a 10b5-1 plan−40,000$34.07$1.4M387,414 directFiling · EDGAR
Nov 3, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−40,000107,334 directFiling · EDGAR
Oct 22, 2026Option or RSU exercised or converted+8,000$12.00$96K395,414 directFiling · EDGAR
Oct 22, 2026Sale under a 10b5-1 plan−8,000$35.06$280K387,414 directFiling · EDGAR
Oct 22, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−8,000147,334 directFiling · EDGAR
Oct 2, 2026Option or RSU exercised or converted+40,000$12.00$480K427,414 directFiling · EDGAR
Oct 2, 2026Sale under a 10b5-1 plan−40,000$33.34$1.3M387,414 directFiling · EDGAR
Oct 2, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−40,000155,334 directFiling · EDGAR
Sep 2, 2026Option or RSU exercised or converted+43,334$12.00$520K430,748 directFiling · EDGAR
Sep 2, 2026Option or RSU exercised or converted+4,666$12.00$56K435,414 directFiling · EDGAR
Sep 2, 2026Sale under a 10b5-1 plan−48,000$40.48$1.9M387,414 directFiling · EDGAR
Sep 2, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−43,3340 directFiling · EDGAR
Sep 2, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−4,666195,334 directFiling · EDGAR
Aug 4, 2026Option or RSU exercised or converted+48,000$12.00$576K435,414 directFiling · EDGAR
Aug 4, 2026Sale under a 10b5-1 plan−48,000$45.71$2.2M387,414 directFiling · EDGAR
Aug 4, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−48,00043,334 directFiling · EDGAR
Jul 2, 2026Option or RSU exercised or converted+6,000$12.00$72K393,414 directFiling · EDGAR
Jul 2, 2026Option or RSU exercised or converted+42,000$12.00$504K435,414 directFiling · EDGAR
Jul 2, 2026Sale under a 10b5-1 plan−48,000$41.22$2M387,414 directFiling · EDGAR
Jul 2, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−6,0000 directFiling · EDGAR
Jul 2, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−42,00091,334 directFiling · EDGAR
Jun 16, 2026Grant or award from the company+23,298387,414 directFiling · EDGAR
Jun 16, 2026Grant or award from the company
Incentive Stock Option (Right to Buy)
+2,4852,485 directFiling · EDGAR
Jun 16, 2026Grant or award from the company
Nonqualified Stock Option (Right to Buy)
+21,48121,481 directFiling · EDGAR
Jun 11, 2026Shares withheld for tax or exercise price−32,565$40.79$1.3M364,116 directFiling · EDGAR
Jun 2, 2026Option or RSU exercised or converted+48,000$12.00$576K444,681 directFiling · EDGAR
Jun 2, 2026Sale under a 10b5-1 plan−48,000$42.84$2.1M396,681 directFiling · EDGAR
Jun 2, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−48,0006,000 directFiling · EDGAR
May 4, 2026Option or RSU exercised or converted+48,000$12.00$576K444,681 directFiling · EDGAR
May 4, 2026Sale under a 10b5-1 plan−48,000$47.25$2.3M396,681 directFiling · EDGAR
May 4, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−48,00054,000 directFiling · EDGAR
Mar 17, 2026Option or RSU exercised or converted+48,000$12.00$576K444,681 directFiling · EDGAR
Mar 17, 2026Sale under a 10b5-1 plan−48,000$39.74$1.9M396,681 directFiling · EDGAR
Mar 17, 2026Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−48,000102,000 directFiling · EDGAR
Feb 18, 2026Shares withheld for tax or exercise price−32,565$40.89$1.3M396,681 directFiling · EDGAR
Feb 10, 2026Shares withheld for tax or exercise price−108,550$41.33$4.5M429,246 directFiling · EDGAR
Aug 15, 2025Derivative converted+500537,796 directFiling · EDGAR
Aug 15, 2025Derivative converted+387,296537,796 directFiling · EDGAR
Aug 15, 2025Derivative converted
Series B Preferred Stock
−5000 directFiling · EDGAR
Aug 15, 2025Derivative converted
Nonvoting Common Stock
−387,2960 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Incentive Stock Option (Right to Buy)
−16,6660 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Incentive Stock Option (Right to Buy)
+16,66616,666 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Incentive Stock Option (Right to Buy)
−19,7100 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Incentive Stock Option (Right to Buy)
+19,71019,710 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−150,0000 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
+150,000150,000 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−133,3340 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
+133,334133,334 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−200,0000 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
+200,000200,000 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−130,2900 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
+130,290130,290 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
−150,0000 directFiling · EDGAR
Aug 15, 2025Option or RSU exercised or converted
Nonqualified Stock Option (Right to Buy)
+150,000150,000 directFiling · EDGAR
Aug 13, 2025Shares withheld for tax or exercise price
Nonvoting Common Stock
−21,710$23.00$499K387,296 directFiling · EDGAR
All 19 Forms 3, 4, 5 and 144
FiledFormCompanyLinks
Nov 5, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Oct 26, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Oct 6, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Oct 2, 2026Form 144Miami International Holdings MIAXFiling · EDGAR
Sep 4, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Aug 6, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Jul 7, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Jul 2, 2026Form 144Miami International Holdings MIAXFiling · EDGAR
Jun 18, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Jun 12, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Jun 4, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
May 5, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Mar 18, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Mar 17, 2026Form 144Miami International Holdings MIAXFiling · EDGAR
Feb 20, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Feb 12, 2026Form 4Miami International Holdings MIAXFiling · EDGAR
Aug 19, 2025Form 4Miami International Holdings MIAXFiling · EDGAR
Aug 15, 2025Form 4Miami International Holdings MIAXFiling · EDGAR
Aug 13, 2025Form 3Miami International Holdings MIAXFiling · EDGAR

Every figure is as filed with the SEC on Forms 3, 4, 5 and 144. Holdings are the amounts reported after each person's latest filing at each company and can be out of date. Matching a Form 144 notice to Form 4 sales is SEC Tracker's inference from owner, company, dates and share counts, not something the filings state. Not investment advice. Not affiliated with the U.S. SEC.