Thomas M. Cornish - 09 Mar 2026 Form 4 Insider Report for BankUnited, Inc. (BKU)

Role: Chief Operating Officer
Signature: /s/ Jacqueline Bravo, as Attorney-in-Fact
Issuer symbol: BKU
Transactions as of: 09 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 11 Mar 2026, 17:29:45 UTC
Previous filing: 25 Apr 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cornish Thomas M.	Chief Operating Officer	C/O BANKUNITED, INC., 14817 OAK LANE, MIAMI LAKES	/s/ Jacqueline Bravo, as Attorney-in-Fact	11 Mar 2026	0001634049

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BKU	Common Stock, par value $0.01 per share	Options Exercise		+55,132	+55%	$0.000000^*	155,132	09 Mar 2026	Direct	F1
transaction	BKU	Common Stock, par value $0.01 per share	Options Exercise		+28,604	+18%	$0.000000^*	183,736	09 Mar 2026	Direct	F2
transaction	BKU	Common Stock, par value $0.01 per share	Disposed to Issuer		-83,736	-46%	$44.76^*	100,000	09 Mar 2026	Direct	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BKU	Performance Share Unit	Options Exercise		-55,132	-100%	$0.000000^*	0	09 Mar 2026	Common Stock, par value $0.01 per share	55,132		Direct	F1, F4
transaction	BKU	Restricted Share Unit	Options Exercise		-28,604	-58%	$0.000000^*	21,104	09 Mar 2026	Common Stock, par value $0.01 per share	28,604		Direct	F2, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each performance share unit represents the right to receive, at settlement, one share of common stock or cash in an amount equal to the fair market value of one share of common stock.
F2	Each restricted share unit represents the right to receive, at settlement, one share of common stock or cash in an amount equal to the fair market value of one share of common stock.
F3	Shares held in a joint account with the reporting person's spouse.
F4	55,132 performance share units vested on December 31, 2025 and are fully vested.
F5	14,090 restricted share units vested on December 31, 2025 were granted under the BankUnited, Inc. 2014 Omnibus Equity Incentive Plan. The units granted under the BankUnited, Inc. 2023 Omnibus Equity Incentive Plan include 14,514 units that vested on December 31, 2025; 14,514 units that will vest on December 31, 2026; and 6,590 units that will vest on December 31, 2027.