Gibraltar Industries CEO acquires 518.16 stock units

Q: How many matching RSUs did ROCK CEO William T. Bosway receive?

William T. Bosway acquired 518.16 matching restricted stock units on September 30, 2026. The units relate to his deferral of a portion of annual base salary under the 2018 Management Stock Purchase Plan.

If officer service continues beyond the fifth anniversary of vesting commencement, RSUs are payable solely in cash in a lump sum or five or ten annual installments.

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Rhea-AI Filing Summary

Gibraltar Industries, Inc. President and CEO William T. Bosway acquired 518.16 matching restricted stock units on September 30, 2026, for deferring part of his annual base salary under the 2018 Management Stock Purchase Plan; his reported position in this award was 45,559.65 units afterward. The units are subject to forfeiture if officer service ends before the fifth anniversary of vesting commencement. If service continues beyond then, they are payable solely in cash beginning six months after termination.

Insider Trade Summary

Grant/Award: 518.16 shares

Grant/Award 3 txns

Insider Bosway William T

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit (2018 MSPP Match) ^{F1, F2, F3}	518.16	$0.00	$0.00
holding	Restricted Stock Unit (2018 MSPP) ^{F4, F5}	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Unit (2018 MSPP Match) — 45,559.65 contracts (Direct); Restricted Stock Unit (2018 MSPP) — 69,271.42 contracts (Direct); Common Stock — 250,320 shares (Direct)

Footnotes (5)

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 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 pursuant to the Company's 2018 Management Stock Purchase Plan.
F4. 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.
F5. 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.

Key Figures

Matching RSUs acquired: 518.16 RSUs Matching RSUs following transaction: 45,559.65 RSUs Other 2018 MSPP RSUs: 69,271.42 RSUs +1 more

4 metrics

Matching RSUs acquired 518.16 RSUs September 30, 2026

Matching RSUs following transaction 45,559.65 RSUs Direct position reported after the September 30, 2026 transaction

Other 2018 MSPP RSUs 69,271.42 RSUs Direct holding reported September 30, 2026

Common stock 250,320 shares Direct holding reported September 30, 2026

Key Terms

Restricted stock units, 2018 Management Stock Purchase Plan, vesting commencement date, substantially equal annual installments

4 terms

Restricted stock units financial

"Restricted stock units are forfeited if Reporting Person's service as an officer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2018 Management Stock Purchase Plan financial

"pursuant to the Company's 2018 Management Stock Purchase Plan"

vesting commencement date technical

"prior to the fifth (5th) anniversary of the Reporting Person's vesting commencement date"

The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.

substantially equal annual installments financial

"five (5) or ten (10) consecutive, substantially equal annual installments"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many matching RSUs did ROCK CEO William T. Bosway receive?

William T. Bosway acquired 518.16 matching restricted stock units on September 30, 2026. The units relate to his deferral of a portion of annual base salary under the 2018 Management Stock Purchase Plan.

How are William T. Bosway's matching RSUs settled?

If his service as an officer continues beyond the fifth anniversary of the vesting commencement date, the units are payable solely in cash beginning six months after termination. The elected form is one lump-sum payment or five or ten consecutive, substantially equal annual installments.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/01/2026 - 01:41 PM Accepted by SEC EDGAR 10/01/2026 - 01:41 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Bosway William T

(Last)

(First)

(Middle)

3556 LAKE SHORE ROAD

P.O. BOX 2028

(Street)

BUFFALO

NEW YORK

14219-0228

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GIBRALTAR INDUSTRIES, INC. [ ROCK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock								250,320	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Unit (2018 MSPP Match)⁽¹⁾	⁽²⁾	09/30/2026		A		518.16⁽³⁾		⁽²⁾	⁽²⁾	Common Stock	518.16	$0	45,559.65	D
Restricted Stock Unit (2018 MSPP)⁽⁴⁾	⁽⁵⁾							⁽⁵⁾	⁽⁵⁾	Common Stock	69,271.42		69,271.42	D

Explanation of Responses:

1. 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.

2. 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.

3. 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 pursuant to the Company's 2018 Management Stock Purchase Plan.

4. 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.

5. 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.

	/s/ Jeffrey J. Watorek, Attorney-in-Fact for William T. Bosway	10/01/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR