CECO ENVIRONMENTAL CORP — Director's Dealing 2026

Mar 18, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CECO ENVIRONMENTAL CORP (CECO)
CIK: 0000003197
Period of Report: 2026-03-15

Reporting Person: Gleason Todd R (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-03-15	Common Stock	A	75055	—	Acquired	482333	Direct
2026-03-15	Common Stock	F	29535	$54.85	Disposed	452798	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-03-16	Stock Option (right to buy)	$57.06	A	17563	Acquired		Common Stock (17563)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	444	Indirect
Common Stock	444	Indirect
Common Stock	444	Indirect
Common Stock	444	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (right to buy)	$6.36		Common Stock (316902)	316902	Direct
Stock Option (right to buy)	$12.72		Common Stock (598204)	598204	Direct
Stock Option (right to buy)	$21.31		Common Stock (25446)	25446	Direct
Stock Option (right to buy)	$23.50		Common Stock (67347)	67347	Direct
Restricted Stock Units	$		Common Stock (225000)	225000	Direct
Restricted Stock Units	$		Common Stock (150000)	150000	Direct

Footnotes

F1: Represents performance share units earned.

F2: Reflects shares withheld for net settlement to cover the tax liability for the vesting of restricted stock units.

F3: The stock option vests in three equal annual installments beginning on March 16, 2027, and expires on March 16, 2036.

F4: The stock option vested in four installments beginning on June 6, 2021, and expires on June 6, 2027.

F5: The stock option vested in four installments beginning on June 6, 2021, and expires on June 6, 2027

F6: The stock option vests in three equal annual installments beginning on March 15, 2025, and expires on March 15, 2034.

F7: The stock option vests in three equal annual installments beginning on March 17, 2026, and expires on March 17, 2035.

F8: Represents performance-based restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Company's stock.

F9: Conversion of restricted stock units to the Company's common stock will occur on July 5, 2027 assuming the reporting person is still employed by the Company and if the shares of the Company's common stock have achieved certain stock price targets over the course of the performance period.

F10: Conversion of restricted stock units to the Company's common stock will occur on June 4, 2029 assuming the reporting person is still employed by the Company and if the shares of the Company's common stock have achieved certain stock price targets over the course of the performance period.