Everspin Technologies Inc (MRAM) experienced a significant after-hours surge of 5.40%, extending gains from a strong regular trading session where the stock rallied over 15%. The movement reflects continued momentum in the semiconductor sector, particularly for memory chip manufacturers.

The after-hours gain appears driven by multiple catalysts. First, the broader semiconductor sector is rallying globally due to booming AI data center demand, which is creating shortages across the chip industry. Memory stocks are leading this surge, with Everspin benefiting from this sector-wide momentum.

Specifically for Everspin, the company's MRAM products are experiencing a global shortage with prices surging 30% to 50%. Demand is particularly strong in AI edge computing and automotive domain controller applications. Additionally, Barclays recently disclosed a 5.02% stake in the company, and market expectations continue to build around Everspin's potential linkage to Intel's foundry business.