ASX Growth Companies With High Insider Ownership In September 2025

As September unfolds, the Australian market faces a cautious atmosphere with the ASX struggling to climb back above 9,000 points amid mixed performances across sectors. In such an environment, identifying growth companies with high insider ownership can be particularly appealing, as these stocks often indicate strong confidence from those who know the business best and may offer resilience in uncertain times.

Top 10 Growth Companies With High Insider Ownership In Australia

Click here to see the full list of 108 stocks from our Fast Growing ASX Companies With High Insider Ownership screener.

Here we highlight a subset of our preferred stocks from the screener.

Emerald Resources (ASX:EMR)

Simply Wall St Growth Rating: ★★★★★★

Overview: Emerald Resources NL is involved in the exploration and development of mineral reserves in Cambodia and Australia, with a market cap of A$2.65 billion.

Operations: The company's revenue primarily comes from mine operations, which generated A$430.41 million.

Insider Ownership: 18.1%

Earnings Growth Forecast: 35.6% p.a.

Emerald Resources demonstrates strong growth potential with its forecasted revenue and earnings growth rates significantly outpacing the Australian market. The company's recent full-year results showed an increase in sales to A$437.79 million, with net income rising to A$87.61 million. Despite no substantial insider buying or selling reported recently, high insider ownership aligns management interests with shareholders, supporting confidence in its strategic direction and anticipated production increases at Okvau Gold Mine through 2026.

• Get an in-depth perspective on Emerald Resources' performance by reading our analyst estimates report here.
• According our valuation report, there's an indication that Emerald Resources' share price might be on the cheaper side.

Platinum Investment Management (ASX:PTM)

Simply Wall St Growth Rating: ★★★★☆☆

Overview: Platinum Investment Management Limited is a publicly owned hedge fund sponsor with a market cap of A$417.16 million.

Operations: The company generates revenue primarily through Funds Management, which accounts for A$131.68 million, supplemented by Investments and Other contributing A$9.22 million.

Insider Ownership: 18.7%

Earnings Growth Forecast: 63.6% p.a.

Platinum Investment Management's earnings are forecast to grow significantly, outpacing the Australian market. Despite revenue growth expectations of 18.8% annually, recent full-year results showed a decline in both revenue (A$140.9 million) and net income (A$6.27 million) compared to last year. The stock trades well below its estimated fair value, although profit margins have decreased from the previous year. Insider trading activity remains minimal, maintaining alignment between management and shareholders' interests.

• Dive into the specifics of Platinum Investment Management here with our thorough growth forecast report.
• Insights from our recent valuation report point to the potential overvaluation of Platinum Investment Management shares in the market.

Vulcan Steel (ASX:VSL)

Simply Wall St Growth Rating: ★★★★★☆

Overview: Vulcan Steel Limited, along with its subsidiaries, operates in the sale and distribution of steel and metal products across New Zealand and Australia, with a market cap of A$904.05 million.

Operations: The company generates revenue through its Steel segment, contributing NZ$409.74 million, and its Metals segment, which accounts for NZ$538.41 million.

Insider Ownership: 38.4%

Earnings Growth Forecast: 32.6% p.a.

Vulcan Steel's earnings are expected to grow significantly, surpassing the Australian market's growth rate. However, recent results revealed a decline in sales (NZ$948.1 million) and net income (NZ$15.7 million). The company is undergoing leadership transition with Gavin Street set to become CEO in 2026, ensuring strategic continuity. Despite lower profit margins and uncovered interest payments by earnings, insider trading activity remains minimal, indicating alignment between management and shareholders' interests.

• Delve into the full analysis future growth report here for a deeper understanding of Vulcan Steel.
• The valuation report we've compiled suggests that Vulcan Steel's current price could be inflated.

Next Steps

• Get an in-depth perspective on all 108 Fast Growing ASX Companies With High Insider Ownership by using our screener here.
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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.The analysis only considers stock directly held by insiders. It does not include indirectly owned stock through other vehicles such as corporate and/or trust entities. All forecast revenue and earnings growth rates quoted are in terms of annualised (per annum) growth rates over 1-3 years.

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