Mass production of HBM4 has been delayed to no earlier than end-Q1 following NVIDIA (NVDA) raising the required pin-per speed and strong demand for prev.-gen Blackwell products, TrendForce reports

• SK Hynix (000660 KS), Samsung (005930 KS) and Micron (MU) have resubmitted HBM4 samples and continue to refine their designs; vs peers, Samsung has taken an early lead by taking a 1cnm process and utilising in-house foundry technology. Points that position Samsung as the most likely supplier to qualify first. 
• Though, SK Hynix has already secured HBM contracts and is expected to retain a dominant share in 2026.

The delay in mass production of HBM4 due to NVIDIA's increased speed requirements highlights a tightening supply chain landscape within the semiconductor sector. Both Micron and SK Hynix are vying for market leadership, but strong demand for prior generation products could impact their immediate revenue outlook and pricing power. This delay might create further opportunities for companies like Samsung that have adapted their processes quicker, affecting competitive dynamics in the market.