CECO insider granted 18,886 stock awards

CECO Environmental’s Chief Human Resources Officer, Candace Harris-Peterson, reported multiple stock awards in the form of common shares.

Rhea-AI Filing Summary

CECO Environmental’s Chief Human Resources Officer, Candace Harris-Peterson, reported multiple stock awards in the form of common shares. On June 1, 2026, she received a total of 18,886 shares at a price of $0.00 per share as compensation awards, not open-market purchases.

The awards reflect converted restricted stock units and performance units from Thermon Group following a merger, with various tranches vesting through March 31, 2029. After these grants, she directly holds 18,886 CECO Environmental common shares.

Insider Trade Summary

Grant/Award: 18,886 shares

Grant/Award 6 txns

Insider Harris-Peterson Candace

Role Chief Human Resources Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,133	$0.00	$0.00
Grant/Award	Common Stock	2,735	$0.00	$0.00
Grant/Award	Common Stock	6,313	$0.00	$0.00
Grant/Award	Common Stock	1,401	$0.00	$0.00
Grant/Award	Common Stock	4,679	$0.00	$0.00
Grant/Award	Common Stock	625	$0.00	$0.00

Holdings After Transaction: Common Stock — 18,886 shares (Direct)

Footnotes (8)

1. F1. On June 1, 2026 (the "Closing Date"), pursuant to an Agreement and Plan of Merger, dated as of February 23, 2026 (the "Merger Agreement"), by and among CECO Environmental Corp. (the "Issuer"), Thermon Group Holdings, Inc. ("Thermon"), Longhorn Merger Sub, Inc. ("Merger Sub, Inc.") and Longhorn Merger Sub LLC ("Merger Sub LLC"), (i) Merger Sub, Inc. merged with and into Thermon, with Thermon continuing as a wholly-owned subsidiary of the Issuer and the surviving corporation of the merger (the "First Merger") and (ii) Thermon, as the surviving corporation of the First Merger, merged with and into Merger Sub LLC, with Merger Sub LLC being the surviving entity of the merger.
2. F2. (Continued from Footnote 1) Pursuant to the Merger Agreement, at the effective time of the First Merger (the "Effective Time"), each outstanding restricted stock unit of Thermon (each a "Thermon RSU") and outstanding award of performance units (each a "Thermon PU"), was automatically assumed by the Issuer and converted into a restricted stock unit with respect to a number of shares of the Issuer's common stock equal to the product of (x) the number of shares of Thermon's common stock subject to such Thermon RSU or Thermon PU and (y) 0.8110 (each, a "Converted RSU Award").
3. F3. On May 12, 2026, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a Converted RSU Award that vests in equal installments on each of June 1, 2027, June 1, 2028 and June 1, 2029.
4. F4. On June 1, 2025, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a Converted RSU Award that vested as to one-third on June 1, 2026 and vests as to one-third on each of June 1, 2027 and June 1, 2028.
5. F5. On June 1, 2025, the Reporting Person was granted an award of Thermon PUs, which was assumed and converted into a Converted RSU Award that vests in full on March 31, 2028.
6. F6. On June 1, 2024, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a Converted RSU Award that vested as to one-half on June 1, 2026 and vests as to one-half on June 1, 2027.
7. F7. On June 1, 2024, the Reporting Person was granted an award of Thermon PUs, which was assumed and converted into a Converted RSU Award that vests in full on March 31, 2027.
8. F8. On June 1, 2023, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a fully vested Converted RSU Award.

Key Figures

Shares granted: 18,886 shares Grant price: $0.00 per share Shares held after awards: 18,886 shares +2 more

5 metrics

Shares granted 18,886 shares Common stock awards granted on June 1, 2026

Grant price $0.00 per share Price for awarded CECO common stock

Shares held after awards 18,886 shares Direct holdings following June 1, 2026 transactions

Conversion factor 0.8110 Thermon awards converted to CECO RSUs at 0.8110 ratio

Vesting date June 1, 2029 Final installment vesting date for certain Converted RSU Awards

Key Terms

restricted stock unit, Thermon PU, Converted RSU Award, Agreement and Plan of Merger, +1 more

5 terms

restricted stock unit financial

"each outstanding restricted stock unit of Thermon (each a "Thermon RSU")"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Thermon PU financial

"outstanding award of performance units (each a "Thermon PU")"

Converted RSU Award financial

"converted into a restricted stock unit... (each, a "Converted RSU Award")"

Agreement and Plan of Merger financial

"pursuant to an Agreement and Plan of Merger, dated as of February 23, 2026"

An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.

First Merger financial

"Merger Sub, Inc. merged with and into Thermon... (the "First Merger")"

FAQ

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

What insider transaction did CECO (CECO) report for Candace Harris-Peterson?

CECO reported that Chief Human Resources Officer Candace Harris-Peterson received stock awards totaling 18,886 common shares. These were compensation-related grants at $0.00 per share, not open-market purchases, tied to converted Thermon restricted stock and performance unit awards.

Were Candace Harris-Peterson’s CECO (CECO) stock awards open-market buys or compensation grants?

The 18,886 CECO common shares reported for Candace Harris-Peterson were compensation grants, coded as “A” for awards. They were issued at $0.00 per share as converted restricted stock unit and performance unit awards following CECO’s merger involving Thermon Group.

How many CECO (CECO) shares does Candace Harris-Peterson hold after the Form 4 transactions?

After the reported awards, Candace Harris-Peterson holds 18,886 CECO common shares directly. This total matches the combined 18,886 shares granted on June 1, 2026, reflecting assumed and converted Thermon equity awards into CECO stock.

What is the connection between Thermon equity awards and CECO (CECO) shares in this Form 4?

Under a merger agreement, Thermon restricted stock units and performance units were assumed by CECO and converted into CECO restricted stock units. Each Thermon award became a CECO award based on a 0.8110 conversion factor, creating the reported 18,886-share grant.

When do Candace Harris-Peterson’s converted CECO (CECO) RSU and PU awards vest?

The converted CECO awards vest over several dates. Footnotes state installments vest on June 1, 2027, June 1, 2028, June 1, 2029, and in full on March 31, 2027 and March 31, 2028, reflecting original Thermon RSU and performance unit schedules.

What does transaction code “A” mean in the CECO (CECO) Form 4 for Candace Harris-Peterson?

Transaction code “A” denotes a grant, award, or other acquisition of securities. In this CECO filing, each transaction for Candace Harris-Peterson reflects stock awards granted at $0.00 per share, not purchases on the open market or discretionary buying activity.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 06/03/2026 - 07:02 PM Learn about SEC filing dates

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^*

Harris-Peterson Candace

(Last) (First) (Middle)

5080 SPECTRUM DRIVE

SUITE 800E

(Street)

ADDISON TEXAS 75001

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Human Resources Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/01/2026		A		3,133(3)	A	(1)(2)	3,133	D
Common Stock	06/01/2026		A		2,735(4)	A	(1)(2)	5,868	D
Common Stock	06/01/2026		A		6,313(5)	A	(1)(2)	12,181	D
Common Stock	06/01/2026		A		1,401(6)	A	(1)(2)	13,582	D
Common Stock	06/01/2026		A		4,679(7)	A	(1)(2)	18,261	D
Common Stock	06/01/2026		A		625(8)	A	(1)(2)	18,886	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. On June 1, 2026 (the "Closing Date"), pursuant to an Agreement and Plan of Merger, dated as of February 23, 2026 (the "Merger Agreement"), by and among CECO Environmental Corp. (the "Issuer"), Thermon Group Holdings, Inc. ("Thermon"), Longhorn Merger Sub, Inc. ("Merger Sub, Inc.") and Longhorn Merger Sub LLC ("Merger Sub LLC"), (i) Merger Sub, Inc. merged with and into Thermon, with Thermon continuing as a wholly-owned subsidiary of the Issuer and the surviving corporation of the merger (the "First Merger") and (ii) Thermon, as the surviving corporation of the First Merger, merged with and into Merger Sub LLC, with Merger Sub LLC being the surviving entity of the merger.

2. (Continued from Footnote 1) Pursuant to the Merger Agreement, at the effective time of the First Merger (the "Effective Time"), each outstanding restricted stock unit of Thermon (each a "Thermon RSU") and outstanding award of performance units (each a "Thermon PU"), was automatically assumed by the Issuer and converted into a restricted stock unit with respect to a number of shares of the Issuer's common stock equal to the product of (x) the number of shares of Thermon's common stock subject to such Thermon RSU or Thermon PU and (y) 0.8110 (each, a "Converted RSU Award").

3. On May 12, 2026, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a Converted RSU Award that vests in equal installments on each of June 1, 2027, June 1, 2028 and June 1, 2029.

4. On June 1, 2025, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a Converted RSU Award that vested as to one-third on June 1, 2026 and vests as to one-third on each of June 1, 2027 and June 1, 2028.

5. On June 1, 2025, the Reporting Person was granted an award of Thermon PUs, which was assumed and converted into a Converted RSU Award that vests in full on March 31, 2028.

6. On June 1, 2024, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a Converted RSU Award that vested as to one-half on June 1, 2026 and vests as to one-half on June 1, 2027.

7. On June 1, 2024, the Reporting Person was granted an award of Thermon PUs, which was assumed and converted into a Converted RSU Award that vests in full on March 31, 2027.

8. On June 1, 2023, the Reporting Person was granted an award of Thermon RSUs, which was assumed and converted into a fully vested Converted RSU Award.

	/s/ Kiril Kovachev as Attorney-in-Fact for Candace Harris-Peterson	06/03/2026
	** 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)