William T. Bosway - 01 Mar 2026 Form 4 Insider Report for GIBRALTAR INDUSTRIES, INC. (ROCK)

Role: President and CEO, Director
Signature: /s/ Jeffrey J. Watorek, Attorney-in-Fact for William T. Bosway
Issuer symbol: ROCK
Transactions as of: 01 Mar 2026
Net transactions value: -$267,059
Form type: 4
Filing time: 03 Mar 2026, 14:07:22 UTC
Previous filing: 09 May 2025
Next filing: 04 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Bosway William T	President and CEO, Director	3556 LAKE SHORE ROAD, P.O. BOX 2028, BUFFALO	/s/ Jeffrey J. Watorek, Attorney-in-Fact for William T. Bosway	03 Mar 2026	0001675953

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ROCK	Common Stock	Tax liability	$267,059	-5,872	-2.5%	$45.48	227,765	01 Mar 2026	Direct

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
holding	ROCK	Restricted Stock Unit (2018 MSPP Match)						43,982	01 Mar 2026	Common Stock	43,982		Direct	F1, F2
holding	ROCK	Restricted Stock Unit (2018 MSPP)						69,271	01 Mar 2026	Common Stock	69,271		Direct	F3, F4

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

Explanation of Responses:

Id	Content
F1	Represents matching restricted stock units allocated to the Reporting Person with respect to the Reporting Person's deferral of a portion of their annual base salary and annual cash incentive compensation pursuant to the Company's 2018 Management Stock Purchase Plan.
F2	Restricted stock units are forfeited if Reporting Person's service as an officer of the Company is terminated prior to the fifth (5th) anniversary of the Reporting Person's vesting commencement date. If service as an officer continues beyond the fifth (5th) anniversary of the Reporting Person's vesting commencement date, restricted stock units are payable solely in cash in one lump sum payment or in five (5) or ten (10) consecutive, substantially equal annual installments, whichever distribution form is elected by the Reporting Person, beginning six (6) months following termination of service. Each restricted stock unit is converted to cash in an amount equal to the fair market value of one share of the Company's common stock, as defined in the Company's 2018 Management Stock Purchase Plan, on the date of termination of the Reporting Person's service as an officer of the Company.
F3	Represents restricted stock units allocated to the Reporting Person with respect to the Reporting Person's deferral of a portion of their annual base salary and annual cash incentive compensation pursuant to the Company's 2018 Management Stock Purchase Plan.
F4	Restricted stock units are payable solely in cash in one lump sum payment or in five (5) or ten (10) consecutive, substantially equal annual installments, whichever distribution form is elected by the Reporting Person, beginning six (6) months following termination of service. Each restricted stock unit is converted to cash in an amount equal to the fair market value of one share of the Company's common stock, as defined in the Company's 2018 Management Stock Purchase Plan, on the date of termination of the Reporting Person's service as an officer of the Company.