GLEASON TODD R (Chief Executive Officer) sold 42.2% of their position (300K shares) of CECO ENVIRONMENTAL CORP on the open market

Open‑market sale worth $15.10M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 5 sales

GLEASON TODD R

Filed: 9/22/2025ACC: 0001193125-25-211916

InsiderGLEASON TODD RCIK 1571235

→

IssuerCECO ENVIRONMENTAL CORPCIK 3197

DirectorOfficer· Chief Executive Officer

Since Jul 2020

-300K

Net shares

Net seller

$15.10M

Total sold

Open market trades

0B · 5S

Total transactions

300K acquired · 600K disposed

Non-Derivative Transactions8

Common Stock

Direct

M · Option Exercise

+100K

Price / share

$12.72

Trade value

$1.27M

% of position

24.3%

9/18/2025

410.83K→510.83K

Common Stock

Direct

S · Sale

−100K

Price / share

$51.30

Trade value

$5.13M

% of position

19.6%

9/18/2025

510.83K→410.83K

Common Stock

Direct

M · Option Exercise

+101.90K

Price / share

$12.72

Trade value

$1.30M

% of position

24.8%

9/19/2025

410.83K→512.73K

Common Stock

Direct

S · Sale

−85K

Price / share

$49.10

Trade value

$4.17M

% of position

16.6%

9/19/2025

512.73K→427.73K

Common Stock

Direct

S · Sale

−16.20K

Price / share

$50.38

Trade value

$816.16K

% of position

3.8%

9/19/2025

427.73K→411.54K

Common Stock

Direct

S · Sale

−700.00

Price / share

$51.15

Trade value

$35.81K

% of position

0.2%

9/19/2025

411.54K→410.83K

Common Stock

Direct

M · Option Exercise

+98.10K

Price / share

$12.72

Trade value

$1.25M

% of position

23.9%

9/22/2025

410.83K→508.94K

Common Stock

Direct

S · Sale

−98.10K

Price / share

$50.45

Trade value

$4.95M

% of position

19.3%

9/22/2025

508.94K→410.83K

Total

Net shares

+0.00

Net value

-$11.29M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	9/18/2025	M · Option Exercise	+100K	$12.72	$1.27M	24.3%	410.83K	510.83K
Common Stock Direct	9/18/2025	S · Sale	−100K	$51.30	$5.13M	19.6%	510.83K	410.83K
Common Stock Direct	9/19/2025	M · Option Exercise	+101.90K	$12.72	$1.30M	24.8%	410.83K	512.73K
Common Stock Direct	9/19/2025	S · Sale	−85K	$49.10	$4.17M	16.6%	512.73K	427.73K
Common Stock Direct	9/19/2025	S · Sale	−16.20K	$50.38	$816.16K	3.8%	427.73K	411.54K
Common Stock Direct	9/19/2025	S · Sale	−700.00	$51.15	$35.81K	0.2%	411.54K	410.83K
Common Stock Direct	9/22/2025	M · Option Exercise	+98.10K	$12.72	$1.25M	23.9%	410.83K	508.94K
Common Stock Direct	9/22/2025	S · Sale	−98.10K	$50.45	$4.95M	19.3%	508.94K	410.83K
Total			+0.00		-$11.29M

Derivative Transactions3

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

100K shares

−100K

Strike price

12.72

Held after

798.20K

Exercisable

—

9/18/2025

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

101.90K shares

−101.90K

Strike price

12.72

Held after

696.30K

Exercisable

—

9/18/2025

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

98.10K shares

−98.10K

Strike price

12.72

Held after

598.20K

Exercisable

—

9/22/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common Stock100K shares	9/18/2025	M · Option Exercise	−100K	12.72	—	798.20K
Stock Option (right to buy) Direct	Common Stock101.90K shares	9/18/2025	M · Option Exercise	−101.90K	12.72	—	696.30K
Stock Option (right to buy) Direct	Common Stock98.10K shares	9/22/2025	M · Option Exercise	−98.10K	12.72	—	598.20K

Non-Derivative Holdings (Post-Transaction)4

Common Stock

Indirect

Shares owned444.00

Common Stock

Indirect

Shares owned444.00

Common Stock

Indirect

Shares owned444.00

Common Stock

Indirect

Shares owned444.00

Total

1.78K indirect1.78K

Security Title	Shares Owned	Ownership Type
Common Stock	444.00	Indirect
Common Stock	444.00	Indirect
Common Stock	444.00	Indirect
Common Stock	444.00	Indirect
Total	1.78K	1.78K indirect

Derivative Holdings (Post-Transaction)5

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

316.90K

Shares owned

316.90K

Exercise price

6.36

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

225K

Shares owned

225K

Exercise price

Expiration

—

Exercise window

—

Stock Options (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

67.35K

Shares owned

67.35K

Exercise price

23.50

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

150K

Shares owned

150K

Exercise price

Expiration

—

Exercise window

—

Stock Options (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

25.45K

Shares owned

25.45K

Exercise price

21.32

Expiration

—

Exercise window

—

Total

Underlying

784.70K

Owned

784.70K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Option (right to buy) Direct	Common Stock	6.36	—	—	316.90K	316.90K
Restricted Stock Units Direct	Common Stock		—	—	225K	225K
Stock Options (right to buy) Direct	Common Stock	23.50	—	—	67.35K	67.35K
Restricted Stock Units Direct	Common Stock		—	—	150K	150K
Stock Options (right to buy) Direct	Common Stock	21.32	—	—	25.45K	25.45K
Total					784.70K	784.70K