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4

Changes in Ownership

Ecovyst Inc. Filed Acc 0001708035-26-000099

Director bought 24,875 shares at $10.05 ($249,994)

From the SEC's structured data for this filing

Trades in this filing

Insider Date Transaction Shares Price Value Owned after D/I
Humble Patti A. Director 2026-09-10 Purchase +24,875 $10.05 $249,994 33,974 D
Open-market purchases · 24,875 sh · avg $10.05 · $249,994
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