5E Advanced Materials appoints Jonathan Siegler as director

5E Advanced Materials, Inc.

Jonathan Siegler appointed to board effective April 13, 2026, filling Bluescape designee seat.
Siegler succeeds Graham van't Hoff as Bluescape designee; van't Hoff remains board chair.
Annual cash retainer of $50,000 plus quarterly RSU grants under Non-Employee Director Compensation Policy.
Siegler is a managing director at Bluescape Energy Partners; subject to standard indemnification agreement.

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