Grayscale parent GSOIH: Matthew Kummell resigns, Simon Koster appointed director

Grayscale Horizen Trust (ZEN)

Matthew Kummell stepped down as director of GSOIH, the sole managing member of Grayscale Operating, effective Oct 13, 2025.
Simon Koster appointed director of GSOIH; he is CSO of Digital Currency Group, managing a portfolio of 250+ early-stage firms.
Koster also serves on boards of Foundry, Luno (since 2023), Fortitude (2024), and Yuma (2025), all Grayscale affiliates.
No reason given for Kummell's departure; Koster's appointment approved by GSOIH on the same date.

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