Highest-materiality recent filing
GSTX appoints two solar industry veterans to board; director and secretary changes
Charles Wantrup resigned as director effective June 29, 2026; no disagreement with company.
Director Andrew Liang resigns from Graphene & Solar board effective June 21, 2026
Andrew Liang resigned as Board member effective June 21, 2026.
GSTX subsidiary awarded $45M California tax credit for solar wafer manufacturing
Wholly owned subsidiary QSM USA received $45 million California Competes Tax Credit.
CFO David Halstead resigns; Kristine Woo appointed interim CFO
David Halstead resigned as CFO and board member effective April 21, 2026, with no disagreement over operations.
Graphene & Solar Technologies appoints Russell Krause to Board of Directors
Russell Krause appointed to the Board of Directors of Graphene & Solar Technologies effective April 14, 2026.
Graphene & Solar Technologies signs non-binding MOU for JV to manufacture silicon wafers
GSTX will own 75% equity in JV; ASMC owns 25%; GSTX funds $10M initial working capital.
GSTX signs non-binding MOU to acquire Henosis shares in Ausquartz Group
MOU with Henosis Ltd for GSTX to acquire Henosis' shareholding in Ausquartz Group Holdings.
Graphene & Solar Technologies moves principal executive offices to Phoenix, AZ
Moved principal executive offices to 11201 North Tatum Boulevard, Suite 300, Phoenix, AZ 85028 effective November 7, 2023.
CEO Roger Thomas May dies; Andrew Liang appointed interim CEO
CEO Roger Thomas May passed away on August 24, 2022.
Graphene & Solar appoints Rodney Young as Chairman, Roger May remains CEO
Rodney Young appointed Chairman of the Board effective December 20, 2021.
GSTX acquires Cima NanoTech for $47M, announces graphene JV and water harvester
Acquired thin-film tech company Cima NanoTech for $47M in May 2021, with 120 patented technologies.
Graphene & Solar Technologies: Chairman resigns, new directors appointed, office moved
Frank Garofalo resigned as Chairman and Director effective May 6, 2021.
On June 29, 2026, Charles Wantrup resigned as a member of the Board of Directors (the "Board") of Graphene & Solar Technologies Limited (the "Company"), effective June 29, 2026.
On June 26, 2026, the Board of Directors of Graphene & Solar Technologies Limited (the "Company") appointed Daniel Kennedy and Theresa Jester as members of the Board of Directors, each effective June 26, 2026.
On June 29, 2026, the Board appointed Paul Saffron as Company Secretary of the Company, effective June 29, 2026.
On June 29, 2026, Kristine Woo notified the Board of her resignation as Interim Company Secretary of the Company, effective June 29, 2026.
On June 26, 2026, the Board of Directors of Graphene & Solar Technologies Limited (the "Company") appointed Daniel Kennedy and Theresa Jester as members of the Board of Directors, each effective June 26, 2026.
the family of Roger Thomas May, CEO, advised board members of his sudden passing late in the evening of August 24, 2022.
the board of directors approved the appointment of Dr. Andrew Liang as interim CEO, while the company commences identifying a permanent replacement to this position.
Roger May who he replaces as Chairman will continue in his role as CEO for the Company.
Rodney Young of Sydney, Australia, has been appointed as the new Chairman of the Company effective December 20th, 2021, until further notice.
Effective May 31, 2021 Kristine Woo was appointed as the interim Company Secretary.
Effective May 6, 2021 Frank Garofalo resigned as the Chairman of the Company’s Board of Directors.
Effective July 12, 2021 Jeffrey Freedman was appointed as Non-Executive Director to the Company Board of Directors.
Max materiality 0.85 · Median 0.50 · Most common event leadership