Schedule 13G filing

Vanguard Capital Management LLC disclosed a 5% stake in KOP

Schedule 13G · Filed Oct 30, 2026

Vanguard Capital Management LLC reported owning 5% of Koppers Holdings Inc. (KOP) (954,282 shares) in a Schedule 13G filed Oct 30, 2026.

A 13G is a passive stake: the holder does not plan to push for changes.

Stake

Koppers Holdings Inc.

Stake

5% stake

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From a public Schedule 13G, linked above. Not investment advice, and not a recommendation to buy or sell.