Bolanowski Katherine 4

4 · GIBRALTAR INDUSTRIES, INC. · Filed Mar 3, 2026

AI-generated summary of this filing

Updated Mar 3, 2026

Gibraltar (ROCK) GC Katherine Bolanowski Sells 739 Shares for Taxes

What Happened

Katherine Bolanowski, General Counsel, Vice President and Secretary of Gibraltar Industries (ROCK), disposed of 739 shares on March 1, 2026 to satisfy a tax payment/withholding obligation. The shares were disposed at $45.48 each for total proceeds of approximately $33,610. The transaction is reported on a Form 4 filed March 3, 2026 and is coded as "F" (payment of exercise price or tax liability).

Key Details

Transaction date: 2026-03-01; Price: $45.48 per share; Total value: ~$33,610
Transaction type/code: F — payment of tax liability / exercise price (i.e., shares disposed to cover taxes)
Filing date: 2026-03-03 (reported on Form 4); filing appears timely
Shares owned after the transaction: not specified in the filing
Footnote F1: These shares relate to matching restricted stock units (RSUs) allocated in connection with the Reporting Person’s deferral of salary and annual cash incentive under the Company’s 2018 Management Stock Purchase Plan.
Footnote F2: The RSUs have vesting/forfeiture and cash-settlement rules (forfeited if service ends before the 5th anniversary of vesting commencement; if service continues beyond that, RSUs are payable in cash in lump sum or installments as elected).

Context

This disposition appears to be a routine tax-withholding sale tied to restricted stock units rather than an open-market, discretionary sale; such transactions are commonly used to satisfy tax obligations on compensation awards and do not necessarily signal a change in the insider’s view of the company.

Form 4

Period: 2026-03-01

General Counsel, VP, Secretary

Transactions

Holdings

Restricted Stock Unit (2018 MSPP Match)
[F1][F2]
→ Common Stock (6,343.09 underlying)
6,343.09

Footnotes (2)

[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.

Signature

/s/ Jeffrey J. Watorek, Attorney-in-Fact for Katherine E. Bolanowski|2026-03-03

1 file