Company · Ownership research

CECO ENVIRONMENTAL CORP CECO

CIK 0000003197

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 35 rows; the complete set is available through the API.

Insider filings on file run through 2026-08-18.

Insider purchases & sales

Purchased: $5.22M
Sold: $31.50M

Sep 1, 2023 – Aug 18, 2026
Available records · partial months are marked ·

20267 of 7 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-06-25	DEZWIREK JASON Director	Sale	$3.31M 34,000 shares sold	20.48% sold Indirect holding	▾
2026-06-24	DEZWIREK JASON Director	Sale	$3.28M 34,000 shares sold	17.00% sold Indirect holding	▾
2026-06-24	Johansson Peter K. SVP, Chief Financial Officer	Sale	$2.89M 30,000 shares sold	42.41% sold Direct holding	▾
2026-06-01	WALLMAN RICHARD F Director	Purchase	$1.54M 20,000 shares bought	23.39% added Indirect holding	▾
2026-05-01	Nanda Munish Director	Sale	$830.15K 11,218 shares sold	15.31% sold Direct holding	▾
2026-04-29	WALLMAN RICHARD F Director	Purchase	$732.50K 10,000 shares bought	4.55% added Direct holding	▾
2026-04-29	WALLMAN RICHARD F Director	Purchase	$368.99K 5,000 shares bought	6.21% added Indirect holding	▾

Showing 7 / 7 record groups in 2026. The complete set is available through the API.

CECO ENVIRONMENTAL CORP · CECO

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 7 of 7 purchase / sale groups and 30 of 35 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"CECO","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.