Yet the stock fell roughly 8% in after-hours trading. The sell-off was attributed to a softer-than-expected Q2 profit forecast midpoint and ongoing concerns about supply constraints for its AI data center chips — a pattern similar to the prior quarter, when Arm beat estimates but shares still fell 6% on supply worries .

Q1 FY2027 Earnings Results

Arm reported record revenue across both of its main segments :

• Revenue: $1.29 billion, up 22% YoY, above the $1.26–$1.27 billion consensus .
• Non-GAAP EPS: $0.45, up 29% YoY, beating the $0.40 consensus estimate by $0.05 .
• Licensing & other revenue: $819 million, up 29% YoY, a record for a first quarter .
• Royalty revenue: $671 million, up 11% YoY, also a record for the period .

Data center royalty revenue more than doubled year over year for the second consecutive quarter, driven by adoption of Arm-based custom silicon at major hyperscalers .

For the second quarter of fiscal 2027, management guided revenue above Wall Street estimates, with adjusted EPS in a range of $0.43 to $0.51, above the $0.43 consensus .

Stock Reaction: A Familiar Pattern

Despite the beat-and-raise quarter, shares fell sharply in after-hours trading .

• Shares dropped roughly 8% in after-hours trade, closing the regular session at roughly $245 and sliding further .
• The midpoint of the Q2 EPS guidance ($0.47) left some investors wanting more given the stock's elevated valuation .
• Supply constraints for its AI data center chips were a key concern — a pattern seen in Q4 FY2026, when Arm beat estimates but shares fell 6% on supply worries .

This sell-off echoes a broader market pattern: Arm stock has been volatile post-earnings, often falling after hours on guidance or cautious comments before potentially rallying in subsequent sessions .

Key AI Business Drivers & Forecasts

AGI (Arm General-Infrastructure) CPU

The AGI CPU is Arm's own data center processor, a strategic expansion beyond licensing and royalties into selling complete chip designs for AI workloads . Management disclosed over $2 billion in cumulative customer demand across fiscal 2027 and fiscal 2028, more than double what was stated at the initial launch .

Meta is the lead co-developer, anchoring the data center expansion case and signaling deep commitment from a major hyperscaler .

Data Center Royalties

Data center royalty revenue more than doubled year over year in Q1, marking a second consecutive quarter of triple-digit growth . This growth is driven by hyperscalers expanding Arm-based custom silicon deployments for AI workloads :

• Nvidia's next-generation Vera CPU is built on Arm architecture, meaning every Vera rack generates royalties for Arm .
• Google continues deploying Arm-based Axion CPUs alongside its TPU systems .
• Amazon (AWS) remains a major Arm-based Graviton customer .
• Microsoft deploys Arm-based Cobalt CPUs .

Big Tech Customer Demand

Arm's licensing growth (up 29%) reflects strong demand for the Arm platform as customers sign long-term architecture agreements for AI, cloud, and custom silicon . Beyond the AGI CPU and data center royalties, Arm's technology is being adopted across edge AI, physical AI, and automotive segments .

Forecast & Outlook

• Management guided Q2 FY2027 revenue above consensus, with adjusted EPS guided to $0.43–$0.51 (consensus $0.43) .
• The Q2 revenue midpoint ($1.38 billion) implies roughly 7% sequential growth, but the EPS midpoint ($0.47) was the focal point of investor disappointment .
• The longer-term thesis rests on data center royalties compounding as more chips ship, and the AGI CPU ramp turning into a multi-billion-dollar revenue stream over FY2028 and beyond .

Key Takeaways for Investors

1. Record quarter, but supply is the bottleneck. Arm delivered a clean beat on revenue and earnings, but the market focused on supply constraints that could limit near-term upside.\
2. AI demand is real and accelerating. The $2 billion in AGI CPU demand and data center royalty growth confirm that hyperscalers are betting big on Arm architecture for AI workloads.\
3. Valuation remains a risk. Even after the post-earnings pullback, Arm trades at a premium multiple, and any sign of slowed growth or persistent supply issues could trigger further downside .

Arm's story remains fundamentally bullish on AI infrastructure demand. But until supply constraints ease, the market may continue to punish even strong quarters.

Yet the stock fell roughly 8% in after-hours trading. The sell-off was attributed to a softer-than-expected Q2 profit forecast midpoint and ongoing concerns about supply constraints for its AI data center chips — a pattern similar to the prior quarter, when Arm beat estimates but shares still fell 6% on supply worries .

Q1 FY2027 Earnings Results

Arm reported record revenue across both of its main segments :

• Revenue: $1.29 billion, up 22% YoY, above the $1.26–$1.27 billion consensus .
• Non-GAAP EPS: $0.45, up 29% YoY, beating the $0.40 consensus estimate by $0.05 .
• Licensing & other revenue: $819 million, up 29% YoY, a record for a first quarter .
• Royalty revenue: $671 million, up 11% YoY, also a record for the period .

Data center royalty revenue more than doubled year over year for the second consecutive quarter, driven by adoption of Arm-based custom silicon at major hyperscalers .

For the second quarter of fiscal 2027, management guided revenue above Wall Street estimates, with adjusted EPS in a range of $0.43 to $0.51, above the $0.43 consensus .

Stock Reaction: A Familiar Pattern

Despite the beat-and-raise quarter, shares fell sharply in after-hours trading .

• Shares dropped roughly 8% in after-hours trade, closing the regular session at roughly $245 and sliding further .
• The midpoint of the Q2 EPS guidance ($0.47) left some investors wanting more given the stock's elevated valuation .
• Supply constraints for its AI data center chips were a key concern — a pattern seen in Q4 FY2026, when Arm beat estimates but shares fell 6% on supply worries .

This sell-off echoes a broader market pattern: Arm stock has been volatile post-earnings, often falling after hours on guidance or cautious comments before potentially rallying in subsequent sessions .

Key AI Business Drivers & Forecasts

AGI (Arm General-Infrastructure) CPU

The AGI CPU is Arm's own data center processor, a strategic expansion beyond licensing and royalties into selling complete chip designs for AI workloads . Management disclosed over $2 billion in cumulative customer demand across fiscal 2027 and fiscal 2028, more than double what was stated at the initial launch .

Meta is the lead co-developer, anchoring the data center expansion case and signaling deep commitment from a major hyperscaler .

Data Center Royalties

Data center royalty revenue more than doubled year over year in Q1, marking a second consecutive quarter of triple-digit growth . This growth is driven by hyperscalers expanding Arm-based custom silicon deployments for AI workloads :

• Nvidia's next-generation Vera CPU is built on Arm architecture, meaning every Vera rack generates royalties for Arm .
• Google continues deploying Arm-based Axion CPUs alongside its TPU systems .
• Amazon (AWS) remains a major Arm-based Graviton customer .
• Microsoft deploys Arm-based Cobalt CPUs .

Big Tech Customer Demand

Arm's licensing growth (up 29%) reflects strong demand for the Arm platform as customers sign long-term architecture agreements for AI, cloud, and custom silicon . Beyond the AGI CPU and data center royalties, Arm's technology is being adopted across edge AI, physical AI, and automotive segments .

Forecast & Outlook

• Management guided Q2 FY2027 revenue above consensus, with adjusted EPS guided to $0.43–$0.51 (consensus $0.43) .
• The Q2 revenue midpoint ($1.38 billion) implies roughly 7% sequential growth, but the EPS midpoint ($0.47) was the focal point of investor disappointment .
• The longer-term thesis rests on data center royalties compounding as more chips ship, and the AGI CPU ramp turning into a multi-billion-dollar revenue stream over FY2028 and beyond .

Key Takeaways for Investors

1. Record quarter, but supply is the bottleneck. Arm delivered a clean beat on revenue and earnings, but the market focused on supply constraints that could limit near-term upside.\
2. AI demand is real and accelerating. The $2 billion in AGI CPU demand and data center royalty growth confirm that hyperscalers are betting big on Arm architecture for AI workloads.\
3. Valuation remains a risk. Even after the post-earnings pullback, Arm trades at a premium multiple, and any sign of slowed growth or persistent supply issues could trigger further downside .

Arm's story remains fundamentally bullish on AI infrastructure demand. But until supply constraints ease, the market may continue to punish even strong quarters.