Company · Ownership research

Custom Truck One Source, Inc. CTOS

CIK 0001709682

Form 4 transactions dated Sep 1, 2023 to Sep 26, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-04-03.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $66.91M
Sold: $17.07M

Sep 1, 2023 – Apr 3, 2026
Available records · partial months are marked ·

2023, from Sep 1, 20238 of 8 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2023-11-14	McMonagle Ryan Chief Executive Officer · Director	Purchase	$103.41K 20,000 shares bought	6.05% added Direct holding	▾
2023-11-13	Eperjesy Christopher J Chief Financial Officer	Purchase	$195.75K 40,000 shares bought	80.26% added Direct holding	▾
2023-11-10	EIN MARK Director	Purchase	$495.76K 100,000 shares bought	6.92% added Direct holding	▾
2023-11-10	Heinberg Marshall Director	Purchase	$71.91K 15,000 shares bought	7.31% added Direct holding	▾
2023-11-10	Heinberg Marshall Director	Purchase	$71.91K 15,000 shares bought	14.29% added Indirect holding	▾
2023-09-11	ECP ControlCo, LLC · ECP Management GP, LLC · Energy Capital Partners Management, LP Director · 10% owner	Sale	$267.91K 41,140 shares sold	Unavailable Indirect holding	▾
2023-09-08	ECP ControlCo, LLC · ECP Management GP, LLC · Energy Capital Partners Management, LP Director · 10% owner	Sale	$316.74K 48,294 shares sold	Unavailable Indirect holding	▾
2023-09-07	ECP ControlCo, LLC · ECP Management GP, LLC · Energy Capital Partners Management, LP Director · 10% owner	Sale	$306.77K 45,660 shares sold	Unavailable Indirect holding	▾

Showing 8 / 8 record groups in 2023. The complete set is available through the API.

Custom Truck One Source, Inc. · CTOS

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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 8 of 8 purchase / sale groups and 19 of 19 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"CTOS","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.