Core Insights - Nebius announced a five-year AI infrastructure agreement with Meta Platforms valued at up to $27 billion, indicating a significant acceleration in hyperscaler AI spending [2][5] - Stocks of Lumentum, SanDisk, and IREN have rallied due to the validation of AI infrastructure buildout linked to the Meta-Nebius deal [2][6] Lumentum Holdings (LITE) - Lumentum's stock increased by approximately 6%, trading around $657, and has risen 69% year to date [9][11] - The company reported Q2 FY2026 revenue of $665.5 million, up 65.5% year over year, with non-GAAP EPS of $1.67, exceeding estimates by 18.57% [11] - Q3 guidance suggests revenue of $780 million to $830 million, indicating over 85% year-over-year growth [12] - Lumentum's products are critical for AI data centers, benefiting from increased commitments to AI infrastructure [10][12] SanDisk (SNDK) - SanDisk's stock surged approximately 8% to around $715, with a 202% increase year to date [13][15] - The company reported Q2 FY2026 revenue of $3.03 billion, up 61.2% year over year, with data center segment revenue increasing by 76% [15] - Q3 guidance anticipates revenue of $4.4 billion to $4.8 billion, with non-GAAP EPS projected between $12 to $14 [15][16] - SanDisk's strategic shift to multi-year data center supply deals positions it well in the AI era [16] IREN (IREN) - IREN's stock rose approximately 7% to around $44.58, building on a 13.3% gain over the past week [17] - The company operates renewable-powered data centers supporting both Bitcoin mining and AI workloads, with a $9.7 billion GPU cloud services contract secured with Microsoft [18] - IREN's AI Cloud revenue nearly tripled sequentially to $17.3 million, indicating rapid growth [19] - Analysts have a consensus target of $80 for IREN stock, with 10 buy ratings against one strong sell [19] Industry Overview - The $27 billion commitment from Meta Platforms signals a multi-year trend in AI infrastructure spending, impacting various sectors from optical interconnects to GPU-powered cloud compute [20] - The deal is seen as a confirmation of a sustained AI infrastructure supercycle, although some analysts caution that it does not guarantee long-term returns for adjacent companies [21]