American optical communications manufacturer Applied Optoelectronics Inc. (AAOI) is entering a growth phase driven by high-end data center optical modules. Second-quarter revenue jumped 86% year-over-year as 800G products began ramping up quickly, with the certification, shipment, and capacity expansion of 1.6T products set to be key variables shaping the company's next phase of revenue and margin trajectory.
For the fiscal second quarter ended June 30, 2026, AAOI reported revenue of $191.9 million, an 86.4% increase year-over-year and a 27% sequential rise. Data center revenue surpassed $100 million for the first time, surging 140% year-over-year and accounting for 56% of total revenue, making it the largest revenue source. The company posted a non-GAAP net profit of $5.48 million, or $0.06 per diluted share, returning to quarterly profitability.
During the earnings call, management stated that demand related to AI infrastructure remains robust, with customer demand exceeding AAOI's current supply capacity by approximately 20% to 40%. This indicates that the primary constraint on near-term revenue growth is not orders but manufacturing capacity and the supply of key components like DSPs and TIAs. The company expects 800G revenue to grow nearly five times sequentially in the third quarter, while 1.6T products will begin shipping late in the third quarter and ramp up in the fourth quarter.
This growth is accompanied by higher capital expenditure. AAOI's capital spending in the second quarter reached $565.5 million, including approximately $280 million in equipment prepayments, primarily for expanding production capacity for 400G, 800G, and 1.6T products. The market's focus is shifting from demand strength to capacity release speed, supply chain security, return on capital spending, and whether high-end products can drive gross margin improvement.
Data Center Revenue Tops $100 Million, Growth Focus Shifts from 400G to 800G
AAOI's data center revenue in the second quarter was $107.7 million, up 140.4% year-over-year and 32.3% sequentially. This business has surpassed CATV to become the company's primary revenue source. From a product mix perspective, 100G products accounted for 38.3% of data center revenue, 200G and 400G products combined for 45%, 800G products made up 11.9%, and 10G and 40G products represented 4.4%. Among these, 400G revenue was $48.4 million, up more than fourfold year-over-year and 27.4% sequentially, remaining a key revenue pillar for the data center business.
However, for investors, the change in 800G is more indicative. 800G revenue in the second quarter was $12.8 million, up more than tenfold year-over-year and more than doubled sequentially. Management expects 800G revenue to approach a fivefold sequential increase in the third quarter, signaling that the growth focus of the company's data center products is shifting from 100G and 400G toward higher-speed products. Meanwhile, the 100G business may face a revenue headwind of approximately $20 million to $25 million in the third quarter due to a customer's limited switch supply, attributed to a memory shortage. This reflects that AAOI's revenue rhythm depends not only on its own shipment capacity but also on the supply conditions of customer system equipment.
Demand Exceeds Supply, Capacity and Key Components Remain Primary Constraints
Management repeatedly emphasized during the call that demand for next-generation AI infrastructure is robust, with current customer demand exceeding AAOI's supply capacity by approximately 20% to 40%. In this context, the company's short-term growth ceiling is primarily determined by capacity and the supply of key materials. For 800G and 1.6T products, components like DSPs and TIAs remain tight. Although AAOI has internal laser production capabilities that can alleviate some industry supply pressure, the overall delivery of high-end modules depends on the coordinated supply of key electronic and optical components.
As of the end of the second quarter, the company's combined monthly production capacity for 800G and 1.6T products was nearly 200,000 units, up from nearly 100,000 units at the end of the first quarter. The company plans to increase this monthly capacity to over 650,000 units by the end of 2026 and further to over 930,000 units by the end of 2027, with more than half of the capacity expected to come from Texas. AAOI's manufacturing footprint in the Greater Houston area has expanded to over 1.6 million square feet. A 210,000-square-foot facility near the company's headquarters is expected to begin initial production by the end of the third quarter, entirely dedicated to 800G and 1.6T transceivers. The company is also advancing construction of other facilities in Pearland and Houston, with related capacity expected to come online in early 2027. Management noted that 800G and 1.6T can use the same production lines and manufacturing processes, with differences mainly in final testing, allowing the company to flexibly allocate capacity across different speed products and reduce switching costs from demand fluctuations for a single product.
1.6T Enters Certification and Initial Shipment Phase, Determining Future Revenue Slope
If 800G is set to be AAOI's main growth driver in the second half of the year, then 1.6T will determine the company's growth trajectory around 2027. The company expects the first 1.6T product to complete customer certification in the coming weeks and begin shipping late in the third quarter. Previously secured large 1.6T orders are expected to start at the end of the third quarter, enter a volume ramp-up phase in the fourth quarter, with some demand potentially extending into the first quarter of 2027. Management's long-term roadmap suggests that by mid-2027, monthly revenue from 100G and 400G products could be around $90 million, 800G monthly revenue around $217 million, and 1.6T monthly revenue around $164 million. If this pace is achieved, total monthly data center transceiver revenue could reach approximately $471 million. However, this path depends on multiple conditions, including equipment installation, customer certification, material supply, and manufacturing yields. While 1.6T products offer higher revenue and gross margin potential, the supply of key components may still limit near-term ramp-up speed. Therefore, the significance of 1.6T for AAOI extends beyond adding a new product category; it lies in whether it can shift the revenue structure further toward high-end products and improve the company's earnings quality.
CATV Continues to Provide Revenue Support, Expected to Exceed $100 Million in Q3
While the data center business accelerates, the CATV business remains an important component of AAOI's current revenue structure. CATV revenue in the second quarter was $80.58 million, up 43.8% year-over-year and 20.6% sequentially, exceeding the company's guidance of $75 million to $80 million. This business accounted for approximately 42% of total revenue, providing stable support as the company's high-end data center module capacity is still ramping up. Management expects third-quarter CATV revenue to rise to between $100 million and $110 million, with full-year revenue expected to exceed $325 million. Mediacom has selected AAOI as the primary supplier for its DOCSIS 4.0 network upgrade, with related products including 1.8GHz intelligent amplifiers and software solutions. In terms of revenue composition, data center and CATV form AAOI's current dual engines. The former offers higher growth flexibility, while the latter maintains a high revenue base in the near term. As the proportion of 800G and 1.6T increases, the data center business's contribution to overall growth is expected to strengthen further.
Gross Margin Under Pressure in Near Term, High-End Product Mix Determines Improvement Potential
AAOI's second-quarter GAAP gross margin was 27.7%, down from 29.1% in the first quarter. The non-GAAP gross margin was 29.8%, at the upper end of the company's guidance range of 29% to 30%. The company guided third-quarter non-GAAP gross margin to be between 29% and 30.5%. The gross margin did not improve in tandem with rapid revenue growth, reflecting cost pressures during the expansion and product introduction phase. Operating expenses were $67.6 million, representing 35.2% of revenue. Management noted that increased transportation costs from the rapid ramp-up of the CATV business and higher customer certification demands for 800G and 1.6T products drove up R&D and operational spending. The GAAP net loss for the second quarter was $22.78 million, or a loss of $0.28 per share. On an adjusted basis, the company achieved a non-GAAP net profit of $5.48 million, or $0.06 per diluted share. The return to adjusted profitability is a key signal, but the quarter's non-GAAP profit was also influenced by a $12.97 million tax benefit, so investors should watch whether future earnings improvements can come more from operational performance. Management's long-term goal is to raise the non-GAAP gross margin to approximately 40%. The main paths to achieve this include increasing the share of 1.6T products, ramping up higher-value-added lasers and CPO-related modules, and improving manufacturing efficiency. In the near term, tight supplies of DSPs, TIAs, and potential expediting fees may partially offset the gross margin improvement from product mix upgrades.
Capital Spending Increases Significantly, Expansion Progress to Determine Capital Efficiency
AAOI is significantly increasing capital investment to capture the window of demand for high-end optical modules. As of the end of the second quarter, the company's cash, cash equivalents, short-term investments, and restricted cash totaled $508.8 million, up from $449.4 million at the end of the first quarter. The company raised $538.8 million in net proceeds through a new at-the-market offering program, providing funding for expansion. Capital spending in the second quarter reached $565.5 million, including approximately $280 million in equipment prepayments, primarily directed toward 400G, 800G, and 1.6T transceiver manufacturing capacity. The company stated that capital spending intensity in the second half is expected to be higher than in the first half, with funding coming from existing cash, operating cash flow, some equity financing, and new debt. The balance sheet also reflects a faster pace of expansion. Net property, plant, and equipment at the end of the period increased to $697.1 million, up sharply from $419 million at the end of the first quarter. Inventory grew from $206.2 million to $278.8 million, mainly to support short-term capacity ramp-ups and raw material reserves. This means that in the coming quarters, the core verification metrics for AAOI will become more specific: whether equipment can be delivered on schedule and converted into effective capacity, whether key components can be adequately secured, whether customer certifications proceed smoothly, and whether new capacity can generate sufficient revenue and profit improvements to cover the capital investment.
Annual Revenue Target Points to Around $1.1 Billion, Execution Pace Still Depends on Supply Chain
The company maintains its full-year revenue target of approximately $1.1 billion. Based on the second-quarter revenue of $191.9 million and expectations for high-end product ramp-ups in the second half, this target depends on the CATV business's continued strength, the rapid ramp-up of 800G, and the initial revenue contribution from 1.6T. AAOI's current business logic is relatively clear: demand remains robust, with customer demand exceeding supply; 800G will replace 400G as the near-term growth driver; 1.6T will determine the upside for revenue and gross margins in the next phase; and capital spending, U.S. manufacturing expansion, and key component supply are the necessary conditions for achieving this growth path. For the market, the risk focus for AAOI is no longer whether demand exists, but whether growth can be realized as planned. Any delay in capacity build-out, material supply, customer certification, or high-end product shipment timing could impact the timeline for revenue ramp-up and profit improvement.
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