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Forensic Analysis · Lumber & Wood Products · as of Nov 8, 2026

Koppers Holdings Inc. (KOP)

A forensic read on Koppers Holdings Inc. built from its complete SEC filings — financial-health screens, earnings quality, red flags and a price-aware rating. Reproducible math, not opinion.

C · Mixed — selective
Forensic grade
Safe
Financial health
3.5
Distress distance
Clean
Earnings quality
2
Forensic signals
10.5%
ROE
-10.2%
Revenue growth

This free snapshot doesn't read filing or proxy text, so the auditor-quality and governance checks that can lower a grade were not evaluated (auditor quality, say on pay, board independence, going concern). Those checks only ever lower a grade, so the full analysis can land below the grade above but never above it — treat it as the most favourable reading, not the settled one.

Koppers Holdings Inc. earns a C (Mixed — selective) forensic quality grade, and its balance-sheet distress test reads 3.5, placing it in the Safe zone. 2 forensic signals were flagged in its latest SEC filings, led by inventory days.

What the filings flag

104d
FY2024→FY2025
Inventory days. Days inventory outstanding moved from 87 to 104 FY2024→FY2025 (against cost of goods sold; inventory +2% vs -14% in cost of sales). Inventory is building a little faster than sales — watch for markdowns.
7.3%
FY2025
Return on invested capital. Return on invested capital is 7.3% in the latest fiscal year and slipping across FY2023–FY2025 from 9.7%. After-tax operating profit was $141M in FY2023 and $116M in FY2025, with operating income at 9.1% of revenue in FY2023, 7.1% in FY2024 and 8.9% in FY2025. The capital base behind it went from $1.4B in FY2023 to $1.6B in FY2025 (+9%), while the revenue it carried went from $2.2B to $1.9B.

Key fundamentals

Latest Revenue$1.88B
Revenue Growth YoY-10.2%
Revenue CAGR (2yr)-6.6%
Net Margin3.0%
Free Cash Flow$67.5M
Return on Equity10.5%
Debt / Equity1.60x

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Data from SEC EDGAR public filings · metrics as of Nov 8, 2026. Forensic signals flag probability, not certainty.

See a wrong number? Report an error with the filing it should match.