Astera Labs ALAB and Amphenol APH are major players in the connectivity and data center infrastructure space. While Astera Labs develops semiconductor-based connectivity solutions tailored for cloud and AI infrastructure, Amphenol specializes in interconnect and sensor technologies across diverse industries.
So, ALAB or APH — Which of these Connectivity stocks has the greater upside potential? Let’s find out.
The Case for ALAB
Astera Labs is rapidly expanding its portfolio to address the growing demands of AI infrastructure and connectivity solutions. It benefits from strong demand for its PCIe solutions, which is noteworthy.
In the first quarter of 2026, Astera Labs delivered strong financial results, with revenues reaching $308 million, up 14% sequentially and 93% year over year. PCIe Gen 6 revenues accounted for more than one-third of the company’s total revenues in the quarter, underscoring the centrality of this product line to Astera Labs’ growth. Millions of PCIe Gen 6 ports have been shipped to date, demonstrating the maturity and adoption of Astera Labs’ portfolio across AI fabric and signal conditioning applications.
ALAB is diversifying its customer base with new design wins and is well-positioned to capitalize on the industry’s transition to PCIe 6, 800 gigs and 1.6T Ethernet connectivity. Management expects continued strong revenue growth through 2026 and into 2027, driven by the proliferation of AI fabrics and the ongoing shift to higher-speed connectivity standards.
Astera Labs’ strong fundamentals, expanding partnerships and rising AI demand reinforce its leadership in connectivity solutions. However, elevated R&D spending, acquisition-related investments and aggressive expansion efforts are pressuring profitability in the near term.
The Case for APH
Amphenol benefits from a diversified business model. Its strong portfolio of solutions, including high-technology interconnect products, is a key catalyst. The company is seeing strong demand for high-speed, power and fiber interconnect products, led by AI-related IT datacom programs and supported by defense, commercial air and diversified industrial applications.
The recent acquisition of CommScope has further strengthened APH’s position in the connectivity space. This move has expanded APH’s product offerings to include the industry’s broadest range of high-speed copper, power and fiber optics interconnect products. It also opened new growth avenues in building connectivity, enabling APH to serve commercial buildings, smart factories, and other infrastructure projects that require robust, future-ready connectivity solutions. The integration of CommScope’s global distribution channels and expertise is expected to create additional synergies and long-term value.
Customer engagement and order trends point to more upside ahead. APH booked a record $9.4 billion in orders in the first quarter of 2026, with a strong book-to-bill ratio of 1.24:1. Customers, especially hyperscalers and enterprise/cloud providers, are seeking more products and are increasingly willing to make commitments that support APH’s capacity investments.
Amphenol continues to benefit from diversified demand across defense, industrial, commercial aerospace and automotive markets. In the first quarter of 2026, defense sales increased 44%, industrial sales rose 52% and commercial aerospace grew 22% on a year-over-year basis. APH expects continued sequential growth in defense and industrial markets during the second quarter, supported by rising defense spending, industrial automation, factory digitization and building connectivity investments.
Price Performance and Valuation of ALAB and APH
In the year-to-date period, ALAB and APH’s shares have gained 117.7% and 15.5%, respectively. The outperformance of ALAB stock can be attributed to its expanding portfolio to address the growing demands of AI infrastructure and connectivity solutions. Its product portfolio, including Scorpio, Aries, and Taurus, has been a key catalyst.
Despite APH’s expanding portfolio sensitivity to telecom and mobile cycles, recent China tax determinations that lift the effective tax rate outlook, macro uncertainty and intense competition are headwinds.
ALAB and APH Stock Performance
Image Source: Zacks Investment Research
Valuation-wise, ALAB and APH shares are currently overvalued as suggested by a Value Score of D and F, respectively.
In terms of forward 12-month Price/Sales, ALAB shares are trading at 33.39X, higher than Amphenol’s 5.34X.
ALAB and APH Valuation
Image Source: Zacks Investment Research
How Do Earnings Estimates Compare for ALAB & APH?
The Zacks Consensus Estimate for ALAB’s 2026 earnings is currently pegged at $2.97 per share, which has increased by a couple of pennies over the past 30 days. This indicates a 61.41% year-over-year rise.
Astera Labs, Inc. Price and Consensus
Astera Labs, Inc. price-consensus-chart | Astera Labs, Inc. Quote
The Zacks Consensus Estimate for Amphenol’s 2026 earnings is currently pegged at $4.76 per share, which has remained unchanged over the past 30 days. This indicates a 42.51% year-over-year rise.
Amphenol Corporation Price and Consensus
Amphenol Corporation price-consensus-chart | Amphenol Corporation Quote
Conclusion
While both ALAB and Amphenol are well-positioned to capitalize on the booming connectivity and data center infrastructure space, Amphenol appears to be the stronger bet given its diversified revenue streams, strong order growth and broader market exposure.
Despite ALAB’s expanding portfolio and strong AI-driven demand, its elevated spending and near-term profitability pressures make the stock riskier at current levels.
Currently, Amphenol has a Zacks Rank #2 (Buy), making the stock a stronger pick than Astera Labs, which has a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.
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This article originally published on Zacks Investment Research (zacks.com).