JAKARTA — Amman Mineral Internasional Tbk. (AMMN) is set for a leadership change as Irwin Ka Pui Wan, a key executive who has served as Director since 2021, has officially tendered his resignation.
In a formal disclosure submitted to the Indonesia Stock Exchange (IDX) on Monday, May 18, 2026, Amman Mineral confirmed that it received notification of Irwin’s decision to step down on May 14, 2026. The company’s Corporate Secretary, Vemmy Febrianti, stated that the firm plans to seek formal approval for this departure during the upcoming Annual General Meeting of Shareholders (AGM) scheduled for Tuesday, May 19, 2026.
Irwin, a seasoned professional with over two decades of global experience in mining, earthworks, and engineering, has been instrumental to Amman Mineral’s success. Since joining the company in 2016, he played a pivotal role in driving operational transformation and cultural shifts during the firm’s ownership transition. His impressive background includes senior management roles at Leighton (Thiess) Contractors, as well as serving as a lead advisor for the HKND Group on the Nicaragua Grand Canal project—one of the largest earthworks and infrastructure endeavors of its time.
His expertise also spans international markets, having previously served as Project Director and Head of Mining for ASX-listed Hunnu Coal Limited and the SET-listed energy company Banpu, where he oversaw coking coal operations in Mongolia. Irwin is a qualified Person for JORC Code reporting and holds multiple degrees in engineering and commerce from the University of Western Australia.
This leadership transition occurs against a backdrop of significant market pressure for AMMN. The company’s stock has seen a decline of 50.44% year-to-date (YtD) as of May 18, 2026, trading at Rp3,370 during the afternoon session after opening at Rp3,580. In response to recent price volatility, the company addressed concerns regarding its market performance in the same regulatory filing.
Vemmy clarified that the company possesses no undisclosed material information or facts that would influence its stock price, citing compliance with OJK Regulation No. 31/POJK.04/2015. She further emphasized that Amman Mineral is not aware of any undisclosed events that would impact investor decisions under the IDX’s Rule I-E regarding information disclosure obligations.
“As of today, we do not have plans for any major corporate actions in the near future, other than those related to the transfer of shares acquired through buybacks,” Vemmy concluded.
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Summary
Irwin Ka Pui Wan, a director at Amman Mineral Internasional Tbk. (AMMN) since 2021, has officially resigned from his position. The company received his notice on May 14, 2026, and plans to seek formal approval for this departure during the upcoming Annual General Meeting of Shareholders. Irwin has been a significant figure in the company, recognized for his extensive background in mining operations and his role in the firm’s operational transformation.
This leadership change coincides with a period of notable market volatility for AMMN, which has experienced a 50.44% decline in stock value year-to-date. In response to these fluctuations, the company issued a disclosure confirming they have no undisclosed material information or upcoming corporate actions that would influence their stock performance. Amman Mineral maintains that its operations remain in full compliance with Indonesian financial regulations.
