CECO Environmental (CECO) SVP reports 10,000-share ownership stake

Rhea-AI Filing Summary

CECO Environmental Corp officer Sam Weston Henderson filed an initial ownership report, disclosing his position in the company’s stock. As of 01/01/2026, he beneficially owns 10,000 shares of CECO common stock, held directly. The filing shows no derivative securities such as options or warrants. Henderson’s title is listed as SVP, Chief Human Resources Officer, and the document is signed by an attorney-in-fact under a power of attorney.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Henderson Sam Weston

(Last) (First) (Middle)

5080 SPECTRUM DRIVE

SUITE 800E

(Street)

ADDISON TX 75001

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
01/01/2026

3. Issuer Name and Ticker or Trading Symbol
CECO ENVIRONMENTAL CORP [ CECO ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks.

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

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	10,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Title: SVP, Chief Human Resources Officer Exhibit 24: Power of Attorney

	/s/ Kiril Kovachev as Attorney-in-Fact for Sam Henderson	01/12/2026
	** 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 5 (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.

FAQ

Who is the insider reporting ownership in CECO (CECO)?

The insider is Sam Weston Henderson, who is an officer of CECO Environmental Corp with the title SVP, Chief Human Resources Officer.

How many CECO common shares does Sam Henderson beneficially own?

The Form 3 reports that Sam Henderson beneficially owns 10,000 shares of CECO common stock, held directly.

What is the effective date of Sam Henderson’s reported CECO holdings?

The date of the event requiring this ownership statement is listed as 01/01/2026.

Does the CECO Form 3 show any derivative securities for Sam Henderson?

No. The table for derivative securities is present but contains no entries, indicating no reportable derivative securities for Sam Henderson in this filing.

Is Sam Henderson a director or 10% owner of CECO Environmental Corp?

No. He is reported as an officer, not a director or 10% owner, with his role specified as SVP, Chief Human Resources Officer.

How is the CECO Form 3 for Sam Henderson signed?

The document is signed “/s/ Kiril Kovachev as Attorney-in-Fact for Sam Henderson”, reflecting the use of a power of attorney.