9 Best Performing Micro Cap Stocks in 2025

5. Amtech Systems Inc (NASDAQ:ASYS)

Market Capitalization: $190.23 Million

YTD Performance: 122.91%

Number of Hedge Fund Holders: 10

Amtech Systems Inc (NASDAQ:ASYS) is one of the best performing micro cap stocks in 2025. On December 11, Benchmark reaffirmed its Hold rating on Amtech Systems Inc (NASDAQ:ASYS) stock. Benchmark noted that Amtech has experienced recent success, primarily on the back of increased demand for reflow equipment related to AI applications. In fact, Benchmark pointed out, Amtech’s AI-related revenue grew more than three times annually, now representing 30% of their Thermal Processing Solutions segment.

Despite the AI boom, Benchmark observed that business from front-end semiconductor customers remained soft during the reporting period. The analysts identified this as a persistent headwind for Amtech’s overall growth.

Separately, Amtech released its Q4 FY2025 earnings on December 10, in which it reported EPS of $0.10, against the forecasted loss of $0.06. Revenue reached $19.8 million, also exceeding estimates; the anticipated figure was $18.25 million. Nonetheless, the revenue figure was 18% lower year over year due to what management described as reduced sales in the mature node semiconductor market.

For the full fiscal 2025, revenue totaled $79.4 million, down from $101.2 million the previous year. Management stated that this reduction was also a function of weaker mature node demand but partially mitigated by AI growth. The company raised guidance for Q1 FY 2026; management expects revenue to fall in the $18-20 million range, with high single-digit adjusted EBITDA margins, citing continued AI market strength and improved operating leverage.

Amtech Systems Inc. (NASDAQ:ASYS) supplies thermal processing and semiconductor equipment used in advanced materials manufacturing. Its product portfolio includes diffusion furnaces, ion implant equipment, and polishing systems.