Company · Ownership research

Koppers Holdings Inc. KOP

CIK 0001315257

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 133 rows; the complete set is available through the API.

Insider filings on file run through Sep 15, 2026.

Insider purchases & sales

Purchased: $0.00
Sold: $21.37M

Nov 1, 2023 – Sep 15, 2026
Available records · partial months are marked ·

202610 of 11 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Aug 31, 2026	BALL M LEROY CEO · Director	Sale	$183.84K 4,000 shares sold	0.92% sold Direct holding	▾
Aug 19, 2026	BALL M LEROY CEO · Director	Sale	$137.52K 3,000 shares sold	0.69% sold Direct holding	▾
Aug 12, 2026	Lucas Stephen G SVP, Culture and Engagement	Sale	$58.27K 1,308 shares sold	3.67% sold Direct holding	▾
Aug 11, 2026	Sullivan James A. President and CTO	Sale	$375.00K 7,500 shares sold	8.30% sold Direct holding	▾
Aug 10, 2026	Pearce Bradley A CAO	Sale	$102.02K 2,000 shares sold	4.65% sold Direct holding	▾
Aug 7, 2026	Sullivan James A. President and CTO	Sale	$4.00M 80,000 shares sold	46.95% sold Direct holding	▾
Jun 18, 2026	BALL M LEROY CEO · Director	Sale	$149.79K 3,412 shares sold	0.78% sold Direct holding	▾
Jun 11, 2026	BALL M LEROY CEO · Director	Sale	$171.19K 4,141 shares sold	0.93% sold Direct holding	▾
May 13, 2026	BALL M LEROY CEO · Director	Sale	$113.14K 2,659 shares sold	0.60% sold Direct holding	▾
Mar 17, 2026	BALL M LEROY CEO · Director	Sale	$94.36K 2,489 shares sold	0.55% sold Direct holding	▾

Showing 11 / 11 record groups in 2026. The complete set is available through the API.

Koppers Holdings Inc. · KOP

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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 11 of 11 purchase / sale groups and 30 of 133 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"KOP","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. Share totals are on today's split-adjusted basis. 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.