Schedule 13G filing

Dimensional Fund Advisors LP disclosed a 6.7% stake in Koppers Holdings Inc. (KOP)

Schedule 13G · Filed Oct 8, 2026

Dimensional Fund Advisors LP reported owning 6.7% of Koppers Holdings Inc. (KOP) (1,265,529 shares) in a Schedule 13G filed Oct 8, 2026.

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

Stake

Koppers Holdings Inc.

Stake

6.7% stake

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