Director DeZwirek entity trims 68K CECO (CECO) shares near $97 while retaining large stake

Rhea-AI Filing Summary

CECO Environmental director-associated entity reports stock sales. An entity called 0to100 Inc., through which director Jason DeZwirek holds shares, sold a total of 68,000 shares of CECO Environmental common stock in open-market transactions.

The sales occurred in two 34,000-share blocks at weighted-average prices of about $96.61 and $97.28 per share, each reflecting multiple trades within disclosed price ranges. After these transactions, 0to100 Inc. held 132,000 shares.

DeZwirek also reports additional holdings as of an earlier date, including 2,770,546 shares indirectly through Icarus Investment Corp., where he is an officer and disclaims beneficial ownership beyond his pecuniary interest, and 1,236,080 shares held directly.

Insights

Insider transactions analyst

Director-linked entity sells 68K CECO shares but retains large stake.

Director Jason DeZwirek, through entity 0to100 Inc., reported open-market sales totaling 68,000 CECO Environmental common shares at weighted-average prices near $97. These are straightforward sale transactions with no options or derivatives involved.

Following the sales, 0to100 Inc. still holds 132,000 shares. The filing also shows much larger positions: 2,770,546 shares indirectly via Icarus Investment Corp. and 1,236,080 shares held directly as of an earlier date, indicating substantial continuing exposure to CECO stock.

Because the transactions represent a small portion of the total reported holdings and there is no mention of a 10b5-1 trading plan or unusual structures, this appears as a routine portfolio adjustment by entities associated with the director rather than a thesis-changing move.

Insider Trade Summary

Net Seller: 68,000 shares ($6,592,199)

Net Sell 4 txns

Insider DEZWIREK JASON

Role null

Sold 68,000 shs ($6.59M)

Type	Security	Shares	Price	Value
Sale	Common Stock	34,000	$97.2792	$3.31M
Sale	Common Stock	34,000	$96.609	$3.28M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 132,000 shares (Indirect, By 0to100 Inc.); Common Stock — 1,236,080 shares (Direct, null)

Footnotes (1)

1. Price reflects the weighted average sale price for multiple transactions that ranged from $96.30 to $97.06 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reflects the weighted average sale price for multiple transactions that ranged from $96.66 to $98.40 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. Reporting Person is an officer of Icarus Investment Corp. and disclaims beneficial ownership except to the extent of his pecuniary interest therein.

Key Figures

Shares sold 06/24: 34,000 shares Shares sold 06/25: 34,000 shares Total shares sold: 68,000 shares +5 more

8 metrics

Shares sold 06/24 34,000 shares Open-market sale at $96.6090 per share

Shares sold 06/25 34,000 shares Open-market sale at $97.2792 per share

Total shares sold 68,000 shares Aggregate net-sell across reported transactions

Price range first sale $96.30–$97.06 per share Weighted-average price $96.6090 explained in footnote

Price range second sale $96.66–$98.40 per share Weighted-average price $97.2792 explained in footnote

0to100 Inc. holdings 132,000 shares Indirect ownership after reported sales

Icarus Investment holdings 2,770,546 shares Indirectly reported as of 2026-06-24 with ownership disclaimer

Direct holdings 1,236,080 shares Direct ownership reported as of 2026-06-24

Key Terms

open-market sale, weighted average sale price, beneficial ownership, pecuniary interest, +1 more

5 terms

open-market sale financial

"transaction_action is described as an open-market sale of common stock"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average sale price financial

"Price reflects the weighted average sale price for multiple transactions"

beneficial ownership financial

"disclaims beneficial ownership except to the extent of his pecuniary interest"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"disclaims beneficial ownership except to the extent of his pecuniary interest therein"

indirect ownership financial

"shares are reported as indirect ownership by 0to100 Inc. and Icarus Investment Corp."

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/26/2026 - 05:14 PM Accepted by SEC EDGAR 06/26/2026 - 05:13 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^*

DEZWIREK JASON

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/24/2026

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	06/24/2026		S		34,000	D	$96.609(1)	166,000	I	By 0to100 Inc.
Common Stock	06/25/2026		S		34,000	D	$97.2792(2)	132,000	I	By 0to100 Inc.
Common Stock								1,236,080	D
Common Stock								2,770,546	I	By Icarus Investment Corp.(3)

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. Price reflects the weighted average sale price for multiple transactions that ranged from $96.30 to $97.06 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

2. Price reflects the weighted average sale price for multiple transactions that ranged from $96.66 to $98.40 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

3. Reporting Person is an officer of Icarus Investment Corp. and disclaims beneficial ownership except to the extent of his pecuniary interest therein.

	/s/ Alyson Gregory as Attorney-in-Fact for Jason DeZwirek	06/26/2026
	** 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)

FAQ

What insider stock transactions did CECO director Jason DeZwirek report?

Jason DeZwirek reported that entity 0to100 Inc. sold 68,000 CECO Environmental common shares in open-market transactions. The sales were split into two 34,000-share blocks at weighted-average prices around $96.61 and $97.28 per share, based on multiple trade executions.

At what prices were the recent CECO (CECO) insider share sales executed?

The filed transactions show 34,000 CECO shares sold at a weighted-average price of $96.6090 and another 34,000 shares at $97.2792. Footnotes explain these prices reflect many trades within ranges of $96.30–$97.06 and $96.66–$98.40 per share.

How many CECO shares does 0to100 Inc. hold after the reported sales?

After the two open-market sales totaling 68,000 CECO shares, 0to100 Inc. holds 132,000 shares of CECO Environmental common stock. These holdings are reported as indirect ownership for director Jason DeZwirek through 0to100 Inc. in the insider filing.

What additional CECO Environmental holdings tied to Jason DeZwirek are disclosed?

Beyond 0to100 Inc., the filing lists 2,770,546 CECO shares indirectly through Icarus Investment Corp., where DeZwirek is an officer, and 1,236,080 shares held directly. A footnote states he disclaims beneficial ownership of Icarus-held shares except for his pecuniary interest.

Were derivatives or stock options involved in the recent CECO insider transactions?

No, the reported insider activity involves only non-derivative CECO Environmental common stock. The transactions are coded as open-market sales of common shares, and the derivative position summary in the filing shows no option exercises or other derivative transactions during this period.

Does the CECO Form 4 indicate if the insider sales were under a trading plan?

The Form 4 describes the transactions as open‑market sales of CECO common stock with weighted-average prices, but the provided footnotes do not reference any Rule 10b5‑1 trading plan. The filing focuses on prices, share amounts, and ownership details instead.