Allegro MicroSystems Inc. (NASDAQ:ALGM) fell 9.84% to $55.52 on June 23, 2026, dragged lower by the Philadelphia Semiconductor Index's 8% decline despite the company's automotive and industrial sensor business having limited direct exposure to AI data centre spending.Key HighlightsAllegro MicroSystems closed at $55.52, down …
DirectBooking Technology Inc. (NASDAQ:ZDAI), formerly known as Primega, a micro-cap provider of construction project management and transport booking technology platforms, declined on June 23, 2026, as broad macro risk-off conditions extended selling pressure across all micro-cap technology names regardless of their specific market focus.
Ultra Clean Holdings Inc. (NASDAQ:UCTT) fell 9.35% to close at $111.63 on June 23, 2026, declining with the semiconductor equipment sector as a broad risk-off move extended across all segments of the chip supply chain.
Tower Semiconductor Ltd. (NASDAQ:TSEM) fell 10.79% to close at $282.65 on June 23, 2026, as a broad semiconductor sector selloff extended to specialty foundry stocks despite Tower's differentiated business model having limited direct exposure to the AI capex concerns driving the day's declines.
SpaceX Inc. (NASDAQ:SPCX) demonstrated relative resilience on June 23, 2026, as the company's differentiated business model and government contract base provided partial insulation from a Nasdaq selloff concentrated in AI infrastructure and semiconductor names.
SanDisk Corp. (NASDAQ:SNDK) fell 13.64% on June 23, 2026, but the session's decline must be understood against the backdrop of one of the most remarkable equity re-ratings in recent market history: a near 5,000% surge since the company's February 2025 spinoff from Western Digital.
SanDisk Corp. (NASDAQ:SNDK) fell 13.64% to close at $1,960 on June 23, 2026, as a combination of Korean memory sector contagion and renewed valuation scrutiny triggered broad profit-taking in one of the year's most spectacular performers.
QuickLogic Corporation (NASDAQ:QUIK) declined on June 23, 2026, as a broad semiconductor sector selloff extended to small-cap programmable logic and embedded AI chip companies.
The artificial intelligence data centre buildout has created an unprecedented demand environment for photonic integrated circuits, driving a wave of investment, production ramp-up, and new entrant activity across the optical networking supply chain even as the June 23, 2026, selloff temporarily compressed valuations across …
POET Technologies Inc., a developer of photonic integrated circuit platforms for AI and data centre applications, declined on June 23, 2026, as a broad selloff in AI optical networking names extended across all photonic semiconductor companies regardless of their individual financial positions.