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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell◇Significant stake declared (13D)●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Aug 31, 2026Reported sale · Form 4M LEROY BALL, CEO · $183.8KOpen the filing ↗
- Aug 19, 2026Reported sale · Form 4M LEROY BALL, CEO · $137.5KOpen the filing ↗
- Aug 12, 2026Reported sale · Form 4Stephen G Lucas, SVP, Culture and Engagement · $58.3KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record1,92914 flagged findings
Reported transactions (Form 4)80since Feb 26, 2026 · and 7 other holdings
Corporate events (8-K)30since Jun 21, 2022
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Koppers is a global chemical and materials company based in Pittsburgh, Pennsylvania, United States. Its headquarters is an art-deco 1920s skyscraper, the Koppers Tower.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-08-06capital return (buybacks/dividends)freshOpen filing ↗“…Dollar Value of Common Shares that May Yet be Purchased Under the Plans or Programs (Dollars in Millions) April 1 - April 30…”
+1 more passage from the same document
- “…Dollar Value of Common Shares that May Yet be Purchased Under the Plans or Programs (Dollars in Millions) April 1 - April 30 0 $…”
- 2026-05-08capital return (buybacks/dividends)recentOpen filing ↗“…Value of Common Shares that May Yet be Purchased Under the Plans or Programs (Dollars in Millions) January 1 - January 31 0 $ 0.00 0…”
+1 more passage from the same document
- “…of Common Shares that May Yet be Purchased Under the Plans or Programs (Dollars in Millions) January 1 - January 31 0 $ 0.00 0 $…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 1,929)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Oct 8, 26SCHEDULE 13G/A ↗Passive stake · Dimensional Fund Advisors LP · 6.7% · event on Sep 30, 26 · amendment
Insider transaction · 7 Form 4 filingsshow all 7hide
- Aug 12, 26Form 144 ↗Notice of proposed sale
- Aug 12, 26Form 4 ↗Insider transaction
- Aug 11, 26Form 144 ↗Notice of proposed sale
Notice of proposed sale · 2 Form 144 filingsshow all 2hide
- Aug 10, 26Form 144 ↗Notice of proposed sale
- Aug 7, 26Form 144 ↗Notice of proposed sale
- Aug 6, 2610-Q ↗Quarterly report
- Aug 6, 268-K ↗Current report · Results
- Jul 31, 26SCHEDULE 13G/A ↗Passive stake · Vanguard Capital Management · 5.0% · event on Jun 30, 26 · amendment
Insider transaction · 7 Form 4 filingsshow all 7hide
1,929 filings on record, the oldest from May 20, 05.
Listing the 25 most recent filings of the 1,929 on record.
115948
- May 11, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- May 8, 26Restructuring plan with committed costs+5 more in the same filing8-K 2.05 ↗
3 senior executive changes2026show all 3hide
- May 7, 26A senior executive left or was appointed+1 more in the same filing8-K/A 5.02 ↗
- Mar 18, 26A senior executive left or was appointed+1 more in the same filing8-K/A 5.02 ↗
- Jan 9, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Dec 3, 25Restructuring plan with committed costs8-K/A 2.05 ↗
- Nov 5, 25A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Jun 18, 25Took on a new financial obligation+2 more in the same filing8-K 2.03 ↗
- May 29, 25A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- May 9, 25A senior executive left or was appointed+3 more in the same filing8-K 5.02 ↗
- Dec 17, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Dec 9, 24A senior executive left or was appointed8-K 5.02 ↗
- Dec 5, 24Restructuring plan with committed costs+1 more in the same filing8-K 2.05 ↗
- Nov 8, 24Restructuring plan with committed costs+2 more in the same filing8-K 2.05 ↗
10 older filings not shown · The record reaches back to Oct 25, 05.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Jan 13, 16Write-down of assets+2 more in the same filing8-K 2.06 ↗
- Jan 22, 14Restructuring plan with committed costs+2 more in the same filing8-K 2.05 ↗
- Dec 6, 11Restructuring plan with committed costs+1 more in the same filing8-K 2.05 ↗
- Jun 28, 06Restructuring plan with committed costs8-K 2.05 ↗
- Apr 21, 06Restructuring plan with committed costs8-K 2.05 ↗
The full record holds 11 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13D: stake and stated purpose
Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.
- Simcoe Capital Management, LLC7.0%May 12, 26SCHEDULE 13D ↗6 co-filers on this document — the figure is the largest single stake, not their sum.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- BlackRock, Inc.15.3%Mar 31, 26SCHEDULE 13G/A ↗2 earlier filings
- The Vanguard Group7.8%Sep 30, 25SCHEDULE 13G/A ↗1 earlier filing
- Dimensional Fund Advisors LP6.7%Sep 30, 26SCHEDULE 13G/A ↗
- PZENA INVESTMENT MANAGEMENT LLC6.1%Mar 31, 25SCHEDULE 13G ↗
- Fuller & Thaler Asset Management, Inc.5.0%Mar 31, 26SCHEDULE 13G/A ↗
show one more holderhide
- Vanguard Capital Management5.0%Jun 30, 26SCHEDULE 13G/A ↗1 earlier filing
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Aug 12, Lucas Stephen G filed notice of intent to sell up to $58K.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $58K on Aug 12, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+3 more recent notices · 3 with a later sale
- Aug 31, 26Sell$184KM LEROY BALLCEO↗
- Aug 19, 26Sell$138KM LEROY BALLCEO↗
- Aug 12, 26Sell$58KStephen G LucasSVP, Culture and Engagement↗
- Aug 11, 26Sell$375KJames A. SullivanPresident and CTO↗
- Aug 10, 26Sell$102KBradley A PearceCAO↗
- Aug 7, 26Sell$4.0MJames A. SullivanPresident and CTO↗
- Aug 7, 26Sell$5KJames A. SullivanPresident and CTO↗
- Jun 18, 26Sell$150KM LEROY BALLCEO↗
- Jun 11, 26Sell$171KM LEROY BALLCEO↗
- May 13, 26Sell$113KM LEROY BALLCEO↗
- Mar 17, 26Sell$94KM LEROY BALLCEO↗
- Mar 2, 26Sell$80KM LEROY BALLCEO↗
There are 2 more transactions in this stretch.
Stock compensation, tax and giftsshow the 26 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Aug 31, 26Giftamount n/aM LEROY BALLCEO↗
- Jun 11, 26Giftamount n/aM LEROY BALLCEO↗
- Jun 3, 26Giftamount n/aXudong Feng↗
- May 26, 26Compensationamount n/aEric D. BrennerCFO and Treasurer↗
- May 12, 26Compensationamount n/aBradley A PearceInterim CFO and CAO↗
- May 7, 26Compensationamount n/aALBERT J NEUPAVER↗
- May 7, 26Compensationamount n/aXudong Feng↗
- May 7, 26Compensationamount n/aTRACI L JENSEN↗
- May 7, 26Compensationamount n/aTRACI L JENSEN↗
- May 7, 26Compensationamount n/aNishan J. Vartanian↗
- May 7, 26Compensationamount n/aNishan J. Vartanian↗
- May 7, 26Compensationamount n/aDAVID L MOTLEY↗
- May 7, 26Compensationamount n/aLaura J Posadas↗
- May 7, 26Compensationamount n/aLaura J Posadas↗
- Mar 17, 26Giftamount n/aM LEROY BALLCEO↗
- Mar 2, 26Giftamount n/aM LEROY BALLCEO↗
- Feb 26, 26Compensationamount n/aM LEROY BALLCEO↗
- Feb 26, 26Compensationamount n/aM LEROY BALLCEO↗
- Feb 26, 26Tax$828KM LEROY BALLCEO↗
- Feb 26, 26Compensationamount n/aStephanie L ApostolouChief Legal&Sus Officer & Sec.↗
- Feb 26, 26Compensationamount n/aStephanie L ApostolouChief Legal&Sus Officer & Sec.↗
- Feb 26, 26Tax$117KStephanie L ApostolouChief Legal&Sus Officer & Sec.↗
- Feb 26, 26Compensationamount n/aJames A. SullivanPresident and CTO↗
- Feb 26, 26Compensationamount n/aJames A. SullivanPresident and CTO↗
- Feb 26, 26Tax$320KJames A. SullivanPresident and CTO↗
- Feb 26, 26Compensationamount n/aBradley A PearceInterim CFO and CAO↗
The full record holds 456 transactions and goes back to Feb 26, 02.
Its sector and its market
Koppers Holdings Inc. among Materials companies
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- 250 clean closes in the period.
- SEC records
- 1,929 documents on file, from May 20, 2005 to Oct 8, 2026.
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- Wikipedia, read on Sep 3, 2026.
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Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
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