Form4insider filings, from the source

Company · CIK 0001315257 · SIC 2400 — Lumber & Wood Products (No Furniture) · NYSE

Koppers Holdings Inc. · KOP

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $5.2M · 8net −$5.2M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesSep 2025Nov 2025Jan 2026Mar 2026May 2026Jul 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 31, 2026 GForm 4 →Sep 1, 4:23 pm EDTM Leroy BallCEO, Director200——429,355—
Aug 31, 2026 SForm 4 →Sep 1, 4:23 pm EDTM Leroy BallCEO, Director4,000$45.96$183,840429,555−0.92%
Aug 19, 2026 SForm 4 →Aug 20, 4:08 pm EDTM Leroy BallCEO, Director3,000$45.84$137,520433,555−0.69%
Aug 12, 2026 SForm 4 →Aug 13, 5:11 pm EDTStephen G LucasSVP, Culture and Engagement1,308$44.55$58,27134,345−3.67%
Aug 11, 2026 SForm 4 →Aug 12, 6:29 pm EDTJames A. SullivanPresident and CTO7,500$50.00$375,00082,898−8.30%
Aug 10, 2026 SForm 4 →Aug 11, 4:25 pm EDTBradley A PearceCAO2,000$51.01$102,02041,037−4.65%
Aug 7, 2026 SForm 4 →Aug 11, 4:21 pm EDTJames A. SullivanPresident and CTO80,000$50.01$4,000,92190,398−46.9%
Jun 18, 2026 SForm 4 →Jun 23, 6:27 pm EDTM Leroy BallCEO, Director3,412$43.90$149,787436,243−0.78%
Jun 11, 2026 GForm 4 →Jun 15, 4:10 pm EDTM Leroy BallCEO, Director300——439,655—
Jun 11, 2026 SForm 4 →Jun 15, 4:10 pm EDTM Leroy BallCEO, Director4,141$41.34$171,189439,955−0.93%
Jun 3, 2026 GForm 4 →Jun 4, 4:05 pm EDTXudong FengDirector5,695——26,489—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 14, 2026 AForm 4 →Sep 15, 4:20 pm EDTSonja Michelle WilkersonDirector29——385—
Sep 14, 2026 AForm 4 →Sep 15, 4:19 pm EDTXudong FengDirector33——445—
Sep 14, 2026 AForm 4 →Sep 15, 4:17 pm EDTDavid L MotleyDirector20——316—
Sep 14, 2026 AForm 4 →Sep 15, 4:15 pm EDTAndrew D SandiferDirector14——117—
Jun 15, 2026 AForm 4 →Jun 17, 4:09 pm EDTXudong FengDirector34——412—
Jun 15, 2026 AForm 4 →Jun 17, 4:07 pm EDTSonja Michelle WilkersonDirector30——356—
Jun 15, 2026 AForm 4 →Jun 17, 4:05 pm EDTDavid L MotleyDirector21——296—
Jun 15, 2026 AForm 4 →Jun 17, 4:04 pm EDTAndrew D SandiferDirector14——103—