Douglas Jr sold $1.6M of Miami International Holdings stock

By AlphaYouPublished Nov 5, 2026Form 4

Stocks in this disclosure

Reported activity

Schafer Douglas M. JR

Reporting filer

Douglas Schafer Jr reported selling 48,000 shares of Miami International Holdings, Inc. for about $1.6M ($34.23 a share on average). Form 4 filed Nov 5, 2026 lists 6 entries.

See the price move since this trade →

Disclosed: Nov 5, 2026

Reported details

6 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	Schafer Douglas M. JR	2026-11-03	M	Exercise or conversion	40000	12	427,414	2 days	Filed terms security Title: Common Stock transaction Date: 2026-11-03 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 id: F1 transaction Shares: 40000 transaction Price Per Share: 12 transaction Acquired Disposed Code: A shares Owned Following Transaction: 427414 direct Or Indirect Ownership: D
Common Stock	Schafer Douglas M. JR	2026-11-03	S	Sale	40000	34.07	387,414	2 days	Filed terms security Title: Common Stock transaction Date: 2026-11-03 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 40000 transaction Price Per Share: 34.07 id: F2 transaction Acquired Disposed Code: D shares Owned Following Transaction: 387414 direct Or Indirect Ownership: D
Common Stock	Schafer Douglas M. JR	2026-11-04	M	Exercise or conversion	8000	12	395,414	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 id: F1 transaction Shares: 8000 transaction Price Per Share: 12 transaction Acquired Disposed Code: A shares Owned Following Transaction: 395414 direct Or Indirect Ownership: D
Common Stock	Schafer Douglas M. JR	2026-11-04	S	Sale	8000	35	387,414	1 day	Filed terms security Title: Common Stock transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 8000 transaction Price Per Share: 35 transaction Acquired Disposed Code: D shares Owned Following Transaction: 387414 direct Or Indirect Ownership: D
Nonqualified Stock Option (Right to Buy) (derivative)	Schafer Douglas M. JR	2026-11-03	M	Exercise or conversion	40000	0	107,334	2 days	Filed terms security Title: Nonqualified Stock Option (Right to Buy) conversion Or Exercise Price: 12 transaction Date: 2026-11-03 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 id: F1 transaction Shares: 40000 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F3 expiration Date: 2029-07-31 underlying Security Title: Common Stock underlying Security Shares: 40000 shares Owned Following Transaction: 107334 direct Or Indirect Ownership: D
Nonqualified Stock Option (Right to Buy) (derivative)	Schafer Douglas M. JR	2026-11-04	M	Exercise or conversion	8000	0	99,334	1 day	Filed terms security Title: Nonqualified Stock Option (Right to Buy) conversion Or Exercise Price: 12 id: F4 transaction Date: 2026-11-04 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 id: F1 transaction Shares: 8000 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F3 expiration Date: 2029-07-31 underlying Security Title: Common Stock underlying Security Shares: 8000 shares Owned Following Transaction: 99334 direct Or Indirect Ownership: D

Common Stock

Owner: Schafer Douglas M. JR
Date: 2026-11-03
Code: M
Action: Exercise or conversion
Quantity: 40000
Price: 12
Following holdings: 427,414
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-03
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 40000
transaction Price Per Share: 12
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 427414
direct Or Indirect Ownership: D

Common Stock

Owner: Schafer Douglas M. JR
Date: 2026-11-03
Code: S
Action: Sale
Quantity: 40000
Price: 34.07
Following holdings: 387,414
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-03
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 40000
transaction Price Per Share: 34.07
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 387414
direct Or Indirect Ownership: D

Common Stock

Owner: Schafer Douglas M. JR
Date: 2026-11-04
Code: M
Action: Exercise or conversion
Quantity: 8000
Price: 12
Following holdings: 395,414
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 8000
transaction Price Per Share: 12
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 395414
direct Or Indirect Ownership: D

Common Stock

Owner: Schafer Douglas M. JR
Date: 2026-11-04
Code: S
Action: Sale
Quantity: 8000
Price: 35
Following holdings: 387,414
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 8000
transaction Price Per Share: 35
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 387414
direct Or Indirect Ownership: D

Nonqualified Stock Option (Right to Buy) (derivative)

Owner: Schafer Douglas M. JR
Date: 2026-11-03
Code: M
Action: Exercise or conversion
Quantity: 40000
Price: 0
Following holdings: 107,334
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Nonqualified Stock Option (Right to Buy)
conversion Or Exercise Price: 12
transaction Date: 2026-11-03
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 40000
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
expiration Date: 2029-07-31
underlying Security Title: Common Stock
underlying Security Shares: 40000
shares Owned Following Transaction: 107334
direct Or Indirect Ownership: D

Nonqualified Stock Option (Right to Buy) (derivative)

Owner: Schafer Douglas M. JR
Date: 2026-11-04
Code: M
Action: Exercise or conversion
Quantity: 8000
Price: 0
Following holdings: 99,334
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Nonqualified Stock Option (Right to Buy)
conversion Or Exercise Price: 12
id: F4
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 8000
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
expiration Date: 2029-07-31
underlying Security Title: Common Stock
underlying Security Shares: 8000
shares Owned Following Transaction: 99334
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Schafer Douglas M. JR: EVP and CIO.
The filing reports a Rule 10b5-1 trading plan.
F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025.
F2: This transaction was executed in multiple trades throughout the day at prices ranging from $33.32 to $34.56. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F3: The options are fully vested.
F4: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

Schafer Douglas M. JR

2026-11-03

Exercise or conversion

40000

427,414

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-11-03
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 40000
transaction Price Per Share: 12
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 427414
direct Or Indirect Ownership: D

Common Stock

Schafer Douglas M. JR

2026-11-03

Sale

40000

34.07

387,414

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-11-03
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 40000
transaction Price Per Share: 34.07
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 387414
direct Or Indirect Ownership: D

Common Stock

Schafer Douglas M. JR

2026-11-04

Exercise or conversion

8000

395,414

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 8000
transaction Price Per Share: 12
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 395414
direct Or Indirect Ownership: D

Common Stock

Schafer Douglas M. JR

2026-11-04

Sale

8000

387,414

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 8000
transaction Price Per Share: 35
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 387414
direct Or Indirect Ownership: D

Nonqualified Stock Option (Right to Buy) (derivative)

Schafer Douglas M. JR

2026-11-03

Exercise or conversion

40000

107,334

2 days

Filed terms

security Title: Nonqualified Stock Option (Right to Buy)
conversion Or Exercise Price: 12
transaction Date: 2026-11-03
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 40000
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
expiration Date: 2029-07-31
underlying Security Title: Common Stock
underlying Security Shares: 40000
shares Owned Following Transaction: 107334
direct Or Indirect Ownership: D

Nonqualified Stock Option (Right to Buy) (derivative)

Schafer Douglas M. JR

2026-11-04

Exercise or conversion

8000

99,334

1 day

Filed terms

security Title: Nonqualified Stock Option (Right to Buy)
conversion Or Exercise Price: 12
id: F4
transaction Date: 2026-11-04
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 8000
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
expiration Date: 2029-07-31
underlying Security Title: Common Stock
underlying Security Shares: 8000
shares Owned Following Transaction: 99334
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Schafer Douglas M. JR: EVP and CIO.

The filing reports a Rule 10b5-1 trading plan.

F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025.

F2: This transaction was executed in multiple trades throughout the day at prices ranging from $33.32 to $34.56. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

F3: The options are fully vested.

F4: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.