8-K filed May 8, 2026, 7:59 PM ET ticker KOP CIK 0001315257

other material confidence high sentiment negative materiality 0.85

Koppers conditionally plans to shut Stickney, IL chemical operations; Q1 adjusted EPS down 19.7%

Koppers Holdings Inc.

Q1 sales $455.3M (flat YoY); net income $7.1M vs loss of $13.9M; adjusted EPS $0.57 vs $0.71.
Conditional decision to discontinue Stickney distillation by Dec 31, 2026, affecting ~85 employees; pending union negotiations.
Pre-tax charges $227M–$262M through 2029, including $170M–$195M non-cash and $57M–$67M cash outlays.
Expected annual free cash flow improvement of $15M–$25M; adjusted EBITDA benefit $15M–$20M/yr; adjusted EPS benefit $1.00–$1.20.
Production to shift to Nyborg, Denmark facility in Q4 2026; enhanced shipping/terminal capabilities to serve customers.

item 2.02 item 2.05 item 5.02 item 5.07 item 7.01 item 9.01

Machine-readable event card

schema_version: secwatch.filing_event.v1
accession: 0001315257-26-000036
form_type: 8-K
ticker: KOP
cik: 0001315257
company_name: Koppers Holdings Inc.
filed_at: 2026-05-08T23:59:59+00:00
discovered_at: 2026-05-14T18:02:32.116893+00:00
generated_at: 2026-05-14T19:52:24.829716+00:00
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sentiment: negative
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Source-grounded claims

fe54d0e42c778f3e1264c8d1043ef5077e43d7c2

Koppers Holdings Inc. reported first quarter of 2026 results: revenue Sales of $455.3 million, net income Net income (loss) of $7.1 million, EPS Diluted EPS of $0.35.

McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

SEC 8-K Item 2.02 confidence 1.0 SEC evidence

cf25faee2fecdaee8c58a86d834655da24360878

Koppers Holdings Inc. announced a restructuring with charges of $227 million to $262 million affecting Stickney, Illinois facility (approximately 85 employees).

potentially appropriate uses for the Stickney facility following the end of production activities. The Company expects this action to result in pre-tax charges to earnings of $227 million to $262 million through the end of 2029, approximately $170 million to $195 million of which constitutes non-cash charges and approximately $57 million to $67 million of which

SEC 8-K Item 2.05/2.06 confidence 0.9 SEC evidence

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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potentially appropriate uses for the Stickney facility following the end of production activities. The Company expects this action to result in pre-tax charges to earnings of $227 million to $262 million through the end of 2029, approximately $170 million to $195 million of which constitutes non-cash charges and approximately $57 million to $67 million of which

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2026 RESULTS • Sales of $455.3 million vs. $456.5 million in Prior Year Quarter • Net income (loss) of $7.1 million vs. $(13.9) million in Prior Year Quarter • Diluted EPS of $0.35 vs. $(0.68) in Prior Year Quarter •

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