| 2024-05-03 | -20.8% | legal | SEC EDGAR | KOP 8-K: 2.02, 5.03, 5.07 (SEC Filing) |
| 2024-05-02 | -18.2% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2025-08-08 | -15.4% | news | Seeking Alpha | Koppers outlines $1.9B-$2B 2025 sales target amid cost reductions and margin-focused transformation |
| 2025-08-08 | -15.4% | earnings | Seeking Alpha | Koppers Holdings Inc. (KOP) Q2 2025 Earnings Call Transcript |
| 2025-08-08 | -15.4% | earnings | Seeking Alpha | Koppers Holdings misses top-line and bottom-line estimates; updates FY outlook |
| 2025-08-08 | -15.4% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2022-11-04 | +14.7% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2025-08-07 | -11.8% | news | Seeking Alpha | Koppers Holdings declares $0.08 dividend |
| 2021-11-04 | -10.5% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2026-02-26 | +10.5% | earnings | Seeking Alpha | Koppers Holdings Inc. 2025 Q4 - Results - Earnings Call Presentation |
| 2026-02-26 | +10.5% | earnings | Seeking Alpha | Koppers Holdings Non-GAAP EPS of $0.70 beats by $0.08, revenue of $432.7M misses by $12.3M |
| 2026-02-26 | +10.5% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2026-02-26 | +10.5% | earnings | Quiver Quantitative | KOPPERS HOLDINGS ($KOP) Releases Q4 2025 Earnings - Quiver Quantitative |
| 2026-02-26 | +10.5% | earnings | Benzinga | Earnings Summary: Koppers Holdings Q4 - Benzinga |
| 2025-02-27 | -9.7% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2025-05-09 | +9.4% | news | Seeking Alpha | Koppers anticipates $280M adjusted EBITDA in 2025 amid cost control and market recovery |
| 2025-05-09 | +9.4% | earnings | Seeking Alpha | Koppers Holdings Inc. (KOP) Q1 2025 Earnings Call Transcript |
| 2025-05-09 | +9.4% | earnings | Seeking Alpha | Koppers Holdings reports mixed Q1 results; reaffirms FY25 outlook |
| 2025-05-09 | +9.4% | legal | SEC EDGAR | KOP 8-K: 2.02, 5.02, 5.07 (SEC Filing) |
| 2024-01-02 | -7.9% | legal | SEC EDGAR | KOP 8-K: 5.02, 8.01 (SEC Filing) |
| 2023-03-10 | -7.4% | legal | SEC EDGAR | KOP 8-K: 8.01 and (SEC Filing) |
| 2024-02-28 | +6.6% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2026-03-03 | +6.0% | news | PR Newswire | Koppers Management Participating in NYSE Materials Virtual Investor Access Day |
| 2026-04-02 | -5.5% | legal | Stock Titan | KOP SEC Filings - Koppers Hldgs 10-K, 10-Q, 8-K Forms - Stock Titan |
| 2026-03-25 | +5.4% | news | Stock Titan | Koppers (NYSE: KOP) director receives grant of 50 dividend equivalent rights - Stock Titan |
| 2026-03-25 | +5.4% | news | Stock Titan | Koppers (KOP) director granted dividend equivalent rights tied to RSUs - Stock Titan |
| 2026-03-25 | +5.4% | news | Stock Titan | Koppers (KOP) director receives new dividend equivalent rights awards - Stock Titan |
| 2026-03-25 | +5.4% | news | Stock Titan | Koppers Holdings (KOP) director awarded 50 dividend equivalent rights - Stock Titan |
| 2026-03-25 | +5.4% | news | Stock Titan | Koppers (KOP) director Sonja Wilkerson awarded new dividend equivalent rights - Stock Titan |
| 2026-03-25 | +5.4% | news | Stock Titan | Koppers (NYSE: KOP) director granted 50 dividend equivalent rights - Stock Titan |
| 2026-03-31 | -5.2% | news | PR Newswire | Koppers Holdings Publishes 2025 Annual Report |
| 2024-02-14 | +4.7% | news | CNN | symbol__ Stock Quote Price and Forecast - CNN |
| 2026-03-24 | +4.7% | news | Zacks | KOP's Multi-Year Tailwind: Grid Buildout & Rail Spend in Focus |
| 2026-03-24 | +4.7% | news | Zacks | Should You Bet on KOP on Cash Flow Inflection Amid Cost Headwinds? |
| 2026-03-24 | +4.7% | news | Zacks | KOP Stock: Can Utility Strength & PC Gains Offset Cost Pressures? |
| 2026-02-11 | +4.6% | earnings | Seeking Alpha | Koppers Holdings raises quarterly dividend by 12.5% to $0.09/share |
| 2026-02-11 | +4.6% | earnings | PR Newswire | Koppers Holdings Inc. Announces Increase to Quarterly Cash Dividend - PR Newswire |
| 2023-02-27 | +4.5% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2026-04-03 | -4.5% | news | Cổng thông tin điện tử tỉnh Lào Cai | KOP Stock Analysis: Koppers Holdings Inc dips 0.96 percent to 37.29 USD near key support - Cổng thông tin điện tử tỉnh Lào Cai |
| 2021-12-03 | +4.2% | legal | SEC EDGAR | KOP 8-K: 5.02 (SEC Filing) |
| 2026-01-09 | +3.9% | executive | Seeking Alpha | Koppers CFO Jimmi Sue Smith to retire |
| 2026-01-09 | +3.9% | legal | SEC EDGAR | KOP 8-K: 5.02, 8.01 (SEC Filing) |
| 2026-01-09 | +3.9% | news | Stock Titan | Latest KOP News - Koppers Holdings Inc. Schedules First Quarte... - Stock Titan |
| 2025-11-06 | -3.8% | news | Seeking Alpha | Koppers Holdings declares $0.08 dividend |
| 2024-08-08 | -3.8% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2022-02-23 | +3.8% | legal | SEC EDGAR | KOP 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-02-28 | -3.7% | earnings | MarketBeat | Koppers Q4 Earnings Call Highlights |
| 2021-05-07 | +3.7% | legal | SEC EDGAR | KOP 8-K: 2.02, 5.02, 5.07 (SEC Filing) |
| 2023-10-12 | -3.6% | legal | SEC EDGAR | KOP 8-K: 1.01, 2.03 (SEC Filing) |
| 2023-08-03 | +3.3% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2025-05-29 | -3.1% | executive | Seeking Alpha | Koppers appoints James Sullivan as chief transformation officer |
| 2025-05-29 | -3.1% | legal | SEC EDGAR | KOP 8-K: 5.02, 8.01 (SEC Filing) |
| 2025-08-13 | +3.0% | earnings | simplywall.st | Koppers Holdings Inc. Just Missed Earnings - But Analysts Have Updated Their Models - simplywall.st |
| 2026-03-20 | -2.9% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Presents at Sidoti March Small-Cap Virtual Conference - Slideshow |
| 2026-03-20 | -2.9% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Presents at Sidoti March Small-Cap Virtual Conference - Slideshow - Seeking Alpha |
| 2023-05-04 | +2.4% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2025-06-03 | +2.3% | news | Minichart | Koppers Holdings Inc. (KOP) - Minichart |
| 2025-11-20 | +2.2% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Presents at 17th Annual Southwest IDEAS Conference - Slideshow |
| 2025-11-08 | +2.2% | earnings | Seeking Alpha | Koppers Holdings Inc. 2025 Q3 - Results - Earnings Call Presentation |
| 2026-04-06 | -2.2% | news | GuruFocus | Koppers Holdings Inc (KOP) Trading Down 3.73% on Apr 6 - GuruFocus |
| 2026-04-06 | -2.2% | news | Cổng thông tin điện tử tỉnh Lào Cai | Is Koppers Holdings (KOP) Stock Rebounding | Price at $35.79, Down 4.02% - Reversal Setup - Cổng thông tin điện tử tỉnh Lào Cai |
| 2025-11-07 | -2.2% | earnings | Seeking Alpha | Koppers targets $80M Catalyst benefits by 2028 as 2025 guidance revised amid weak demand |
| 2025-11-07 | -2.2% | earnings | Seeking Alpha | Koppers Holdings Inc. (KOP) Q3 2025 Earnings Call Transcript |
| 2025-11-07 | -2.2% | earnings | Seeking Alpha | Koppers Holdings Non-GAAP EPS of $1.21 beats by $0.03, revenue of $485.3M misses by $31.2M |
| 2025-11-07 | -2.2% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2024-04-15 | +2.1% | legal | SEC EDGAR | KOP 8-K: 1.01, 2.03 (SEC Filing) |
| 2023-04-11 | +2.1% | legal | SEC EDGAR | KOP 8-K: 1.01, 2.03 (SEC Filing) |
| 2026-02-15 | +2.1% | news | simplywall.st | Koppers Holdings' (NYSE:KOP) Dividend Will Be Increased To $0.09 - simplywall.st |
| 2025-10-09 | +2.1% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Special Call - Slideshow |
| 2022-06-21 | +2.0% | legal | SEC EDGAR | KOP 8-K: 1.01, 1.02, 2.03 (SEC Filing) |
| 2026-03-02 | -2.0% | news | Stock Titan | Koppers (NYSE: KOP) VP awarded shares, then surrenders stock for tax - Stock Titan |
| 2025-12-02 | -2.0% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Presents at Bank of America Leveraged Finance Conference Transcript |
| 2025-08-11 | +1.9% | news | Seeking Alpha | Koppers: Near-Term Challenges And Debt Burden Outweigh Current Modest Improvements |
| 2025-06-05 | +1.8% | earnings | Seeking Alpha | Koppers Meeting Its Aggressive Guidance So Far, But I Wait For A Lower Price |
| 2026-02-27 | -1.8% | news | Seeking Alpha | Koppers targets $300M free cash flow over three years as Catalyst initiatives accelerate |
| 2026-02-27 | -1.8% | earnings | Seeking Alpha | Koppers Holdings Inc. (KOP) Q4 2025 Earnings Call Transcript |
| 2024-12-09 | -1.7% | legal | SEC EDGAR | KOP 8-K: 5.02 (SEC Filing) |
| 2025-08-02 | -1.6% | news | simplywall.st | Is Koppers Holdings Inc. (NYSE:KOP) Potentially Undervalued? - simplywall.st |
| 2025-12-11 | +1.6% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Presents at Sidoti Year End Virtual Investor Conference - Slideshow |
| 2026-04-11 | +1.6% | news | Stock Traders Daily | How Koppers Holdings Inc. (KOP) Affects Rotational Strategy Timing - Stock Traders Daily |
| 2025-06-20 | +1.6% | legal | Stock Titan | KOP SEC Filings - Koppers Hldgs 10-K, 10-Q, 8-K Forms - Stock Titan |
| 2026-01-16 | -1.6% | news | AD HOC NEWS | The Truth About Koppers Holdings Inc (KOP): Boring Stock Or Silent Money Machine? - AD HOC NEWS |
| 2022-12-13 | +1.5% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2023-05-05 | +1.5% | legal | SEC EDGAR | KOP 8-K: 2.02, 5.07 (SEC Filing) |
| 2022-08-04 | -1.4% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2026-03-16 | -1.4% | news | PR Newswire | Koppers Management Participating in Sidoti Small Cap Conference |
| 2023-11-03 | -1.4% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2025-07-25 | +1.3% | earnings | Stock Titan | Global Wood Treatment Leader Koppers Sets Q2 2025 Earnings Call for August 8 - Stock Titan |
| 2026-01-29 | +1.2% | news | Stock Titan | Koppers to review 2025 financial results in Feb. 26 investor call - Stock Titan |
| 2024-11-08 | -1.2% | legal | SEC EDGAR | KOP 8-K: 2.02, 2.05 (SEC Filing) |
| 2024-02-13 | -1.2% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2024-02-13 | -1.2% | news | Stock Titan | Koppers Holdings Names Nishan J. Vartanian to Board - Stock Titan |
| 2024-12-17 | -1.2% | legal | SEC EDGAR | KOP 8-K: 1.01, 2.03 (SEC Filing) |
| 2026-03-18 | +0.9% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2021-08-06 | +0.7% | legal | SEC EDGAR | KOP 8-K: 2.02 and (SEC Filing) |
| 2021-08-06 | +0.7% | legal | SEC EDGAR | KOP 8-K: 5.02, 8.01 (SEC Filing) |
| 2026-03-05 | -0.7% | earnings | Seeking Alpha | Koppers Guides For A Good Year Again Despite Not Meeting Guidance This Year |
| 2025-11-05 | -0.7% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2025-04-24 | -0.6% | news | Stock Titan | KOP Stock Price, News & Analysis - Stock Titan |
| 2026-03-30 | -0.6% | news | CNW Group | NYSE Content Update: Koppers to Ring Closing Bell for 20th Listing Anniversary |
| 2026-03-30 | -0.6% | news | PR Newswire | Koppers to Ring NYSE Closing Bell to Celebrate 20th Anniversary of Listing; Management Hosting Meetings with the Financial Community in New York |
| 2026-03-30 | -0.6% | news | Stock Titan | Koppers rings NYSE bell, lines up New York investor meetings - Stock Titan |
| 2026-03-30 | -0.6% | news | AD HOC NEWS | Koppers Holdings Inc Stock Marks 20th NYSE Anniversary with Closing Bell Ceremony Amid Strategic Gro - AD HOC NEWS |
| 2025-06-18 | -0.5% | news | Seeking Alpha | Koppers extends $800M credit facility to 2030 |
| 2025-06-18 | -0.5% | legal | SEC EDGAR | KOP 8-K: 1.01, 2.03 (SEC Filing) |
| 2022-09-12 | +0.4% | analyst | Zacks Investment Research | What is the current Price Target and Forecast for Koppers (KOP) - Zacks Investment Research |
| 2025-11-23 | -0.3% | news | Seeking Alpha | Koppers Trades At 7x Cycle-Average Income, But All Businesses Are In Retreat |
| 2025-10-08 | -0.2% | news | Seeking Alpha | Koppers Holdings Inc. (KOP) Special Call - Slideshow |
| 2026-02-07 | +0.1% | news | simplywall.st | An Insider At Koppers Holdings Lowered Their Holding Recently - simplywall.st |
| 2025-04-23 | +0.1% | news | Intellectia AI | KOP Stock: Price, Forecast, Financials & AI Analysis - Intellectia AI |
| 2023-03-22 | -0.1% | legal | SEC EDGAR | KOP 8-K: 5.02 and (SEC Filing) |
| 2022-05-06 | +0.0% | legal | SEC EDGAR | KOP 8-K: 2.02, 5.07 (SEC Filing) |
| 2026-04-24 | — | news | PR Newswire | Koppers Holdings Inc. Schedules First Quarter 2026 Conference Call |
| 2026-04-24 | — | news | Stock Titan | Koppers will post first-quarter results before markets open May 8 - Stock Titan |
| 2026-04-24 | — | news | Stock Titan | BlackRock holds 15.3% of Koppers Holdings Inc. (NYSE: KOP) in Schedule 13G/A - Stock Titan |