Should You Hold on to Applied Optoelectronics Stock Post Q2 Earnings?

Applied Optoelectronics AAOI stock gained 16% in the pre-market hours on Aug. 7, 2026, after it released better-than-expected results on Aug. 6. In the second quarter of 2026, the company achieved its fifth consecutive quarter of record revenues, reaching $191.9 million, which marked an 86% year-over-year increase and a 27% sequential rise from the first quarter. This robust performance was attributed to strong demand in both the data center and CATV (cable television) businesses. 

AAOI shares have also skyrocketed 256.4% in the year-to-date period, outperforming the Zacks Computer & Technology sector’s rise of 16.9% and the Zacks Electronics - Semiconductors increase of 33%. The company’s shares have also outperformed its peers, which include Lumentum LITE, Ciena CIEN, and Coherent COHR. All three companies are expanding their footprints in the optical networking market. Lumentum, Ciena and Coherent shares have surged 127.4%, 72.2% and 81.1%.

The company is benefiting from the surge in AI infrastructure deployments that require high-speed optical transceivers. This demand is particularly strong for next-generation products such as 400G, 800G, and 1.6T transceivers, which are essential for hyperscale data centers supporting AI workloads.  In the second quarter of 2026, 800G revenues were $12.8 million, representing 11.9% of datacenter revenues, and more than doubled sequentially. Meanwhile, 400G revenues totaled $48.4 million, rising more than fourfold year over year and 27.4% sequentially.

AAOI Stock Performance

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AAOI Benefits From Datacenter and CATV Businesses

Applied Optoelectronics is benefiting from the powerful dual engines of its data center and CATV businesses. In the second quarter of 2026, Datacenter revenues reached $107.66 million, up 140.4% year over year and 32.3% sequentially. The business accounted for 56% of total revenues, supported by stronger shipments of high-speed optical transceivers used in AI-focused infrastructure.

The company is benefiting from its aggressive expansion of U.S.-based manufacturing capacity. The company’s Texas footprint now exceeds 1.6 million square feet, with new facilities dedicated to high-speed transceiver production coming online. Manufacturing capacity for 800G and 1.6T products is expected to ramp up from 200,000 units per month to over 650,000 by year-end, and to 930,000 by the end of 2027. This expansion is critical, as current and forecasted demand for AAOI’s products continues to outpace supply, with customer orders already booked well into next year.

The CATV business delivered record revenues of $80.6 million, up 43.8% year over year and 20.6% sequentially in the second quarter of 2026. This growth was fueled by large shipments of 1.8 gigahertz amplifiers to major customers and new wins such as being selected by Mediacom as the primary vendor for DOCSIS 4.0 network upgrades. 

The broad-based appeal of AAOI’s amplifiers and QuantumLink software, along with momentum among new MSO customers, has diversified the company’s revenue base and reduced reliance on any single market segment. AAOI expects CATV revenues to be between $100 million and $110 million in the third quarter of 2026 and expects to generate over $325 million annually in this segment.

AAOI’s Earnings Estimates Show Upward Trend

AAOI’s robust demand for its next-generation data center products, particularly driven by the rapid expansion of AI infrastructure and the company’s ongoing investments in manufacturing capacity, is expected to benefit the company’s top-line growth.

For the third quarter of 2026, Applied Optoelectronics expects revenues between $255 million and $290 million. The Zacks Consensus Estimate for the third quarter is currently pegged at $270.28 million, indicating 127.84% year-over-year growth.

Applied Optoelectronics expects non-GAAP earnings ranging from 11 cents to 26 cents per share. The consensus mark for earnings is currently pegged at 27 cents per share, which has remained unchanged over the past 30 days. This suggests an increase of 400% year over year.

Applied Optoelectronics, Inc. Price and Consensus

Applied Optoelectronics, Inc. price-consensus-chart | Applied Optoelectronics, Inc. Quote

AAOI Suffers From Supply Constraints and Rising Costs

Despite its expanding portfolio, AAOI is suffering from production capacity and key component supply constraints, which have limited its ability to meet surging customer demand for next-generation AI infrastructure products. 

AAOI also faced temporary setbacks in its 100G product line in the second quarter of 2026 due to a memory shortage affecting customers’ ability to source switches. This is likely to result in a $20–25 million revenue shortfall in the third quarter of 2026. Operating expenses were also higher than expected, due to increased shipping costs and elevated R&D spending to qualify new products.

AAOI Trades at a Premium

Applied Optoelectronics shares are currently overvalued, as suggested by its Value Score of F.

AAOI stock is trading at a premium with a trailing 12-month Price/Sales of 5.91X compared with the Electronics - Semiconductors industry’s 5.36X.

AAOI Valuation

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What Should Investors Do With AAOI Stock?

Applied Optoelectronics is benefiting from robust and accelerating demand for its next-generation data center products (especially 800G and 1.6T transceivers), driven by AI infrastructure investments and its ability to rapidly expand manufacturing capacity and leverage in-house laser production.

However, intensifying competition from larger rivals like Lumentum, Ciena and Coherent, production capacity constraints and supply chain challenges remain headwinds that could hurt the company’s financial performance. Stretched valuation also remains a concern.

Applied Optoelectronics currently carries a Zacks Rank #3 (Hold), suggesting that it may be wise to wait for a more favorable entry point in the stock. 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).

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