Applied Materials AMAT shares fell 5.73% in premarket trading Tuesday, dropping to $558.84 from Monday's close of $592.79. The decline is tied to a broader semiconductor and memory-equipment selloff triggered by a "sell-the-news" reaction to Samsung's preliminary earnings.

Applied Materials shares surged 33.12% over the last 30 days, driven by accelerating demand for semiconductor manufacturing equipment tied to AI infrastructure buildouts. The stock’s quarterly performance was even more dramatic, more than doubling as investors priced in multi-year growth from advanced chip fabrication.

ASYS shares declined approximately 14.2% over the past 30 days, falling from $21.91 on June 4 to $18.81 by July 2, 2026. A $60 million oversubscribed public offering priced at $20.50 per share in early June introduced significant dilution concerns, with the share count expanding by roughly 29%.

Kulicke and Soffa Industries, Inc. ( KLIC ) and Power Integrations, Inc.

Kulicke and Soffa Industries (KLIC) shares surged approximately 13.0% over the past 30 days, climbing from $107.52 on June 4 to $121.46 as of July 2, 2026. The rally was fueled by sustained investor enthusiasm around AI-driven advanced packaging demand, particularly for the company's Fluxless Thermo-Compression Bonding (TCB) systems.

Both DIOD and KLIC are semiconductor companies that have delivered substantial year-to-date gains, significantly outperforming broader market benchmarks in recent market activity. DIOD focuses on discrete, analog, and logic semiconductors with exposure to automotive and industrial end markets, while KLIC provides semiconductor assembly equipment and advanced packaging solutions.

Both ACMR and AMAT operate in the wafer fabrication equipment (WFE) segment of the semiconductor industry, supplying tools essential for chip manufacturing. Recent market activity shows notable volatility, with both stocks experiencing significant price declines in early July 2026 amid broader sector movements.

ACM Research shares have pulled back from all-time highs above $127 in late June to approximately $98, reflecting profit-taking after a sharp rally and broader semiconductor sector volatility. First-quarter 2026 revenue surged 34.2% year-over-year to $231.3 million, with total shipments up 53.6%, highlighting robust demand for the company's wafer processing and advanced packaging equipment.

Applied Materials shares surged 20.4% over the past 30 days, climbing from $500.77 on June 3 to $603.03 on July 2, 2026. The rally was fueled by robust fiscal second-quarter earnings, an upbeat guidance raise, and accelerating AI-driven demand for semiconductor manufacturing equipment.

KLAC shares dropped -5.28% during regular trading on Thursday, extending the prior session's steep -11.77% decline. The move is part of a broad semiconductor sell-off as investors lock in profits following the VanEck Semiconductor ETF's +82% surge in the first half of 2026.

KLAC shares rose more than 11% over the past 30 days, driven by strong semiconductor sector momentum and AI-related demand. The company reported solid quarterly results earlier in the period, with robust orders in its core inspection and metrology businesses.

AMAT shares surged approximately +6.97% in premarket trading on June 25, 2026, rising from a prior close of $588.97 to roughly $630.00. The primary catalyst was Micron Technology's (MU) historic fiscal Q3 2026 earnings beat — revenue of $41.46 billion and adjusted EPS of $25.11, both far above estimates — which directly validates accelerating AI-driven capital expenditure that flows through to Applied Materials' equipment order book.

Applied Materials (AMAT) surged approximately 35.5% over the last 30 days, climbing from around $432 to above $585, driven by AI-fueled semiconductor equipment demand. The stock posted a quarterly gain exceeding 61%, reflecting sustained momentum from record DRAM performance, advanced logic spending, and high-bandwidth memory expansion.

Lam Research shares surged approximately 34% over the last 30 days, climbing from around $305 to an all-time high of $409.75 on June 22, 2026. The rally was fueled by booming wafer fabrication equipment (WFE) demand tied to AI-driven semiconductor expansion, a strong fiscal Q3 2026 earnings beat, and a wave of analyst price target upgrades.

ICHR surged approximately 52.7% over the last 30 days, climbing from $64.58 on May 19, 2026, to $98.61 on June 18, 2026, hitting a new 52-week high. Over the last quarter, the stock has more than doubled, reflecting a powerful rally across the semiconductor equipment sector fueled by AI-driven capital expenditure.

ACM Research (ACMR) surged approximately 35% over the last 30 days, climbing from around $73 to above $99 per share as of late June 2026. The rally was fueled by stronger-than-expected Q1 2026 earnings, with revenue rising 34% year-over-year and EPS nearly doubling consensus estimates.

Ultra Clean Holdings reported Q1 2026 revenue of $533.7 million, surpassing estimates, with non-GAAP EPS of $0.31. The company issued Q2 revenue guidance of $565–$605 million, signaling continued growth amid strong semiconductor demand.

Veeco Instruments Inc. stock rose approximately 21% over the past 30 days, driven primarily by strong order activity in silicon photonics and positive full-year guidance.

Camtek Ltd. (CAMT) stock declined approximately 19% over the past 30 days, reflecting broader market volatility in the semiconductor sector.

KLAC fell -10.19% to $241.73 during regular market hours from the prior close of $269.16. The decline reflects a sharp reversal in semiconductor equipment stocks after recent gains to all-time highs.