The SPDR STI ETF (SGX: ES3) tracks Singapore’s 30 largest listed companies. It returned 13.1% in the first half of 2026. That is a respectable number. Three names outside the index still left it far behind. MoneyMax Financial Services Ltd (SGX: 5WJ), Oiltek International Ltd (SGX: HQU), and ISDN Holdings Ltd (SGX: I07) each more than doubled over the same six months. None sits in the Straits Times Index (SGX: ^STI). All three belong to Singapore’s small and mid-cap universe, where trading activity and institutional interest in that segment picked up sharply in the first half. What did investors see in these three?

What did Oiltek do to earn a second look?

Oiltek supplies process technology to the global vegetable oils industry, and it has commissioned plants in more than 37 countries. Its FY2025 numbers favour quality over headline growth. Revenue fell 8.2% year on year (YoY) to RM211.4 million as large refinery projects in Indonesia and Africa wound down....