Current Report · Items 5.02 · 8-K

Graphene & Solar Technologies Ltd.

GSTXOTCEQUITYCurrent

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements

Filed Apr 23, 2026Accepted Apr 23, 2026, 12:03 PM EDTCIK 1497649Accession 0001903596-26-000163

Company context

Graphene & Solar Technologies Limited includes majority- and wholly owned companies operating under the Quartz & Silicon Materials (“QSM”) brand. The group is developing an integrated supply chain for solar and silicon materials, with operations and planned projects in the United States, Australia, New Zealand and Europe. QSM USA is focused on supporting domestic solar manufacturing through the development of silicon wafer and related manufacturing capacity in the United States. GSTX is headquartered in Phoenix, Arizona, and its common stock is quoted on the OTCQB Venture Market under the symbol “GSTX.”

Current securities

GSTXOTC · EQUITY · Current

Recent company filings

Disclosure sections

Items 5.02

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Item 5.02Item 5.02 - Departure/Election of Directors

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On April 21, 2026, David Halstead resigned as Chief Financial Officer and as a member of the Board of Directors (the "Board") of Graphene & Solar Technologies Limited (the "Company"), effective April 21, 2026. David Halstead's resignation is not the result of any disagreement or issues relating to the Company's operations, policies, or practices. On April 21, 2026, the Board of Directors of the Company appointed Kristine Woo to serve as the Company’s interim Chief Financial Officer, effective immediately. The Company plans to promptly initiate a search for a permanent successor to be Chief Financial Officer. Kristine Woo will receive compensation consistent with the Company's executive compensation policies. There are no arrangements or understandings between Kristine Woo and any other person pursuant to which she was selected as interim Chief Financial Officer, no family relationships with any director or executive officer of the Company, and no transactions requiring disclosure under Item 404(a) of Regulation S-K.