Inquiry about the proportion of in-house laser production and the roadmap to achieve the 40% gross margin target, including timing.

Thompson Lin stated that 1.6T products have much higher gross margins. He expects overall transceiver gross margin to be 35-38% by Q2 FY27 and over 40% by Q4 FY27, depending on the 1.6T portion. He also mentioned investing $300 million in Texas to triple laser manufacturing capacity by Q2 FY27. “I believe we're going to achieve 40% growth margin by late Q3 or Q4 next year [2027].”

How AOI's confident CATV outlook aligns with less inspiring CapEx forecasts from large cable operators.

Stefan Murry explained that AOI plays in the outside plant (amplifiers), which is a focus area for CapEx spending. He also highlighted momentum from a wider swath of new MSO customers beyond the top 1-3. “where the money gets spent is another thing. And I think they're spending this year and next year a significant amount of their spend is going towards the amplifiers, the outside plant, part of the network, and that's where we play.”

Details on milestones for the Q2 FY26 800G ramp, particularly regarding firmware issues and qualification, and whether current demand translates to orders.

Stefan Murry confirmed firmware optimization for interoperability across customer platforms is the last hurdle, expected to be completed by mid-March. Thompson Lin stated that demand is much larger than capacity, with orders expected soon from at least two customers, potentially over $100 million for 800G and $200 million for 1.6T transceivers within months. “firmware has to be modified to work with all those different platforms... that should be done in the middle of next month.”

AAOI

Applied Optoelectronics (AAOI) Q4 FY25 earnings call: guidance and Q&A

Earnings call· Dec 2025 (Q4 FY25)· Information Technology· Feb 26, 2026

Source: earnings call transcript

Executive summary

Applied Optoelectronics Q4 FY25 — Record Revenue Driven by Strong CATV and Data Center Demand, 800G Ramp Expected Q2 FY26

Applied Optoelectronics reported record Q4 FY25 results, driven by robust demand in both CATV and data center segments, with non-GAAP gross margin exceeding expectations. While 800G revenue was delayed to Q2 FY26 due to firmware optimization, the company anticipates a strong ramp, backed by significant capacity expansion and new customer engagements for 800G and 1.6T products, positioning it for over $1 billion in revenue in FY26.

Highlights

Total revenue increased 34% year-over-year to a record $134.3 million in Q4 FY25.
Non-GAAP gross margin of 31.4% was above the guidance range of 29-31%.
Non-GAAP loss per share of $0.01 was narrower than the guidance range of a loss of $0.13 to a loss of $0.04.
Received fourth 800G volume order from a major hyperscale customer, with production ramp anticipated in Q2 FY26.
CATV revenue nearly tripled to $245 million in FY25, driven by robust demand for 1.8 gigahertz amplifiers.

Concerns

800G revenue came in below expectations ($4 million-$10 million) in Q4 FY25 due to ongoing firmware optimizations, delaying significant ramp to Q2 FY26.
Total capital investments in FY25 were $209 million, exceeding projections of $120 million-$150 million, primarily due to increased customer demand projections.
Non-GAAP operating expenses increased to $49.3 million (37% of revenue) in Q4 FY25, compared to $31.5 million (31% of revenue) in Q4 FY24.
Direct tariffs had a $1.2 million impact on the income statement in Q4 FY25.

Guidance & targets

Category	Target	Timeline	Confidence
Q1 FY26 Revenue	$150 million to $165 million high materiality	Q1 · FY26	High
Q1 FY26 Non-GAAP Gross Margin	29% to 31% medium materiality	Q1 · FY26	High
Q1 FY26 Non-GAAP Net Income	loss of $7 million to a loss of $0.3 million high materiality	Q1 · FY26	High
Q1 FY26 Non-GAAP EPS	loss of $0.09 per share and breakeven high materiality	Q1 · FY26	High
FY26 Revenue	Over $1 billion high materiality	FY26	High
FY26 Non-GAAP Operating Profit	Over $120 million high materiality	FY26	High
CATV Revenue	Nearly $300 million annually medium materiality	FY26	Medium
800G/1.6T Production Capacity	Over 500,000 pieces per month high materiality	End of FY26	High
800G/1.6T Production Capacity from Texas	~1/4 of total medium materiality	End of FY26	High
800G/1.6T Production Capacity from Texas	More than 55% high materiality	End of FY27	High
Laser Manufacturing Capacity	More than triple high materiality	Mid-2027 · CY27	High
100G and 400G Monthly Revenue	Approximately $90 million medium materiality	Mid-2027 · CY27	High
800G Monthly Revenue	Approximately $217 million high materiality	Mid-2027 · CY27	High
1.6T Monthly Revenue	Approximately $71 million high materiality	Mid-2027 · CY27	High
Total Transceiver Monthly Revenue	$378 million high materiality	Mid-2027 · CY27	High
Non-GAAP Gross Margin	Around 40% high materiality	Long-term	High
Non-GAAP Gross Margin (Transceiver)	35% to 38% high materiality	Q2 · FY27	High
Non-GAAP Gross Margin (Transceiver)	More than 40% high materiality	Q4 · FY27	High
Non-GAAP Profitability	Achieved high materiality	Q2 · FY26	High
800G Firmware Optimization Completion	Completed high materiality	March 2026 · CY26	High
Texas Facility Qualification	Full qualification medium materiality	Midyear FY26	High

Segment performance

Segment	Revenue	YoY	QoQ	Margin
Total Company Record revenue for Q4 FY25, in line with guidance range of $125 million to $140 million. Total revenue for FY25 was $456 million, an 83% increase compared to FY24.	$134.3 million	34%	13%	—
Data Center Strong performance driven by robust demand, particularly in 400G products. One U.S.-based large hyperscale customer became a 10% customer for the first time in a long time. FY25 Revenue: $196 millionFY25 Growth YoY: 32%100G Products Sales YoY: 54%400G Products Sales YoY: 141%Q4 FY25 Revenue Mix - 100G: 51%Q4 FY25 Revenue Mix - 200G and 400G: 41%Q4 FY25 Revenue Mix - 10G and 40G: 8%	$74.9 million	69%	70%	—
CATV In line with expectations, with significant quantity of 1.8 gigahertz amplifiers shipped to largest customer. Continued momentum from a new set of MSO customers. FY25 Revenue: $245 millionFY25 Growth YoY: Nearly tripled	$54 million	3%	-24%	—
Telecom Telecom sales are expected to fluctuate quarter-to-quarter.	$5.1 million	45%	37%	—
FTTH, Telecom and Other Represents the remaining portion of total revenue. Q4 FY25 Revenue Share: 4%	—	—	—	—

Orderbook & backlog

800G/1.6T Forecast Demand Exceeds production capacities Q4 FY25

Projected to exceed production capacities through mid-2027.

800G Transceiver Orders >$100 million Within a few months (expected)

Expected from at least 2 customers, potentially within 1-3 months.

1.6T Transceiver Orders >$200 million Within a few months (expected)

Expected from at least 2 customers, potentially within 1-3 months.

Product announcements

Product	Type	Timeline	Details
800G Transceivers	milestone	Production ramp starting Q2 FY26
1.6T Products	roadmap	Discussions started 'just within the last few weeks'

Capital programs

New Facility in Sugar Land, Texas underway

Start: February 2026

Benefit:Expand U.S. production capacity for 800G/1.6T products.

Signed an agreement to lease an additional building. Construction began earlier this month to scale production towards achieving 2026 targets.

Laser Manufacturing Capacity Expansion in Texas planned $300 million

Benefit:More than triple laser manufacturing capacity.

Investment to fulfill transceiver demand, especially for 800G and 1.6T, as current demand is much larger than projected capacity.

Risks & headwinds

800G Firmware Optimization Delay Q4 FY25, resolution expected March 2026

800G revenue came in below expectations of $4 million-$10 million in Q4 FY25.

Mitigation:Working with customer to finalize firmware for interoperability; ramping production in anticipation of Q2 FY26 volume.

Tariff Impact Q4 FY25 and ongoing

$1.2 million impact on income statement in Q4 FY25; $3.1 million impact on capital equipment in Q4 FY25; $7 million-$8 million total tariffs in FY25.

Mitigation:Reducing China-sourced component exposure to near 0 for 800G/1.6T designs; scaling U.S. production; analyzing potential to recoup IEEPA tariffs.

Capacity Limitations FY26 through mid-2027

FY26 revenue target of over $1 billion is limited by production capacity and supply chain, not market demand (which is 'much larger'). Forecast demand for 800G modules projected to exceed production capacity through mid-2027.

Mitigation:Materially expanded manufacturing capacity; adding additional capacity in Texas; tripling laser manufacturing capacity.

Longer U.S. Capacity Build-out Ongoing

N/A

Mitigation:Strategic investment in Texas, with a long-term goal of over 55% of 800G/1.6T manufacturing in the U.S. by end of FY27, despite longer build times and higher costs.

What to watch in Q1 FY26

800G Revenue Ramp

Q2 FY26

Current Below $4 million in Q4 FY25

Target Dominant revenue contributor in Data Center, >$25 million-$30 million

Why it matters

Verifies successful firmware optimization and the start of significant AI-driven revenue growth.

although 800G is expected to dominate our revenue beginning in Q2.

Find out whether AAOI delivers this. Inve re-checks your case every morning.

Q&A highlights

Clarification on the exact 800G revenue figure for Q4 FY25, given it was below expectations.

Management stated 800G revenue was below $4 million, with the delay due to firmware optimization, pushing the significant ramp to Q2 FY26. Thompson Lin clarified that the $378 million monthly revenue target is for Q2 FY27, not Q2 FY26.

“We didn't break out exactly, but it was below $4 million.”

asked by Simon Leopold · answered by Stefan Murry

2 min read 6 chapters

Detailed narrative

Strategic Priorities and Progress

Applied Optoelectronics focused on scaling next-generation data center products (400G/800G), expanding production capacity (especially in Texas), diversifying its revenue base, and strengthening operational execution to improve margins and long-term profitability in FY25. The company reported significant progress on each of these fronts, and these areas will remain key priorities for FY26.

800G and 1.6T Product Roadmap

The company received its fourth 800G volume order from a major hyperscale customer for AI data center growth, with a strong ramp anticipated starting Q2 FY26. Forecast demand for 800G modules is projected to exceed production capacity through mid-2027. New hyperscale customers are engaging for 800G and 1.6T products, with 1.6T expected to begin contributing to overall revenue later in FY26.

Manufacturing Capacity Expansion

AOI has materially expanded its manufacturing capacity, reaching approximately 90,000 units per month of 800G capacity by year-end FY25, with about 31% of that production based in the U.S. An additional building in Sugar Land, Texas, is under construction to support the target of producing over 500,000 pieces of 800G and 1.6T products per month by the end of FY26, with a significant portion from Texas.

By the end of FY27, over 55% of 800G/1.6T manufacturing is expected to be in the U.S.

In-House Laser Capabilities

AOI's in-house laser manufacturing capabilities are considered a strategic advantage, helping the company avoid shortages that affect others in the industry. The company plans to invest $300 million to more than triple its laser manufacturing capacity in Texas by mid-2027 to support future growth drivers like CPO and accommodate the increasing demand for transceivers.

CATV Business Momentum

The CATV segment demonstrated robust demand for 1.8 gigahertz amplifiers from its largest customer and continued momentum from a new set of MSO customers. The company's QuantumLink software suite is designed to provide enhanced remote management and control over HFC network elements, and it is anticipated to generate some revenue in FY26, contributing to the segment's potential to reach nearly $300 million annually.

Tariff Impact and Mitigation

Direct tariffs had a $1.2 million impact on AOI's income statement in Q4 FY25 and $3.1 million on capital equipment. The company is actively reducing its exposure to China-sourced components for 800G/1.6T products to near zero and is scaling U.S. production to minimize future tariff impacts.

AOI is also exploring the potential to recoup approximately $4.6 million in IEEPA-related tariffs from Q4 FY25, part of an estimated $7 million-$8 million in total tariffs for FY25.

Summary of the company's earnings call; see how call summaries are prepared. Not investment advice.