Sandifer Andrew D 4

What Happened
Andrew D. Sandifer, a director of Koppers Holdings Inc. (KOP), received equity awards on 2026-03-23 consisting of 50 derivative units and an additional 5.268 derivative units (total 55.268). Each unit is a dividend equivalent right (DER) that is the economic equivalent of one share of Koppers common stock. The awards were reported as acquired at $0.00 (these are grant/accruals, not open-market purchases).

Key Details

• Transaction date: 2026-03-23; filing date: 2026-03-25 (reported within the typical two-business-day window).
• Reported amounts: 50 DERs (related to time-based RSUs from the May 8, 2025 grant) and 5.268 DERs (related to deferred compensation) — total 55.268 RSU-equivalents.
• Reported price: $0.00 (award/grant). These are derivative awards, not immediate common stock purchases.
• Shares owned after transaction: not specified in this filing.
• Footnotes:
  • F1: DERs accrued with respect to additional time-based RSUs credited from the May 8, 2025 RSU grant.
  • F2: Once released, the RSUs corresponding to these DERs will be payable per the Koppers Director Deferred Compensation Plan — either lump sum or annual installments beginning the May 31 after separation (or a later year elected).
  • F3: DERs also reflect amounts credited with respect to deferred compensation.

Context
This is a grant/accrual of dividend-equivalent units tied to RSUs and deferred compensation for a board director — a common form of director compensation. These DERs represent the economic equivalent of shares but are subject to the company’s RSU/deferred-compensation payout terms and are different from an open-market purchase or immediate share ownership.