Notes on $Applied Optoelectronics(AAOI.US) ahead of Q2 earnings next week:
For the TLDR thesis: $Applied Optoelectronics(AAOI.US) is the only Western vertically integrated transceiver maker with its own InP laser fab pointed directly at the 800G/1.6T ramp. Currently undergoing capacity expansions in Texas, so if the capacity lands, the revenue is essentially pre-sold due to the demand/supply gap. Everything else, like a high multiple / dilution risk / CPO timelines is secondary noise to whether $Applied Optoelectronics(AAOI.US) can actually build modules fast enough.On the Q1 call, CEO said: “the actual demand is not $1.1B, it is $1.4-1.5B” with the FY guide raised only to “exceed $1.1B” revenue because production and supply chains are their cap right now.Therefore, given that demand > supply, $Applied Optoelectronics(AAOI.US) then becomes a bet on manufacturing execution. I.e. can $Applied Optoelectronics(AAOI.US) take 800G/1.6T capacity from ~100,000 modules/month (in Q1) to >650,000/month by Y/E and ~930,000/month by the end of 2027? Since I’m not an insider, I have no idea. But if they ramp up, both revenue and margins inflect.Also, I personally feel like most $Applied Optoelectronics(AAOI.US) bear posts I read are over-indexing on customer concentration and dilution, while under pricing their one properly differentiated asset: the laser fab.Everyone is short InP.InnoLight, Eoptolink, and the entire merchant module base buy their EMLs from a handful of suppliers. Mainly $Lumentum(LITE.US) and $Coherent Corp.(COHR.US). Who themselves are capacity constrained and locked in their supply via the $NVIDIA(NVDA.US) investment back in March. Even $Fabrinet(FN.US) mentioned that their datacom line is capped by component and material supply e.g. lasers, DSPs, ASICs, and not demand.Whereas $Applied Optoelectronics(AAOI.US) is the one player in Western supply chains that makes its own EMLs on its own tools and is expanding that laser fab by ~4x heading into 2027.In Q1, the CFO said: “equipment availability has not been a problem to date because most of this equipment is developed in-house… which means that we are not generally in direct competition with other similar companies for supply.”So in a world short of lasers, vertical integration essentially means that $Applied Optoelectronics(AAOI.US) can actually ship while merchants can’t.That’s also why the tariff overlay matters more than you think because the bulk of global transceiver assembly sits in China. For U.S. hyperscalers, a U.S. laser fab supplier is an effective procurement hedge with no Chinese peers. Chinese modules still undercut on price by ~20-25%, so this is a security/supply argument rather than a cost saving one. Which is the structural reason why $Amazon(AMZN.US) and $Microsoft(MSFT.US) engaged in the first place, and is why $Applied Optoelectronics(AAOI.US)’s Texas expansion is genuinely strategic rather than vanity capex like many people have feared with the AI infra buildout.That said, 800G is still tiny: in Q1, it was just 5.6% of DC revenue, with the quarter carried by 100G (41% of DC) and 200G/400G (46.7%). The “800G ramp” is a forward event that should begin showing up slightly in Q2, but a lot more materially in Q3.For this reason, I believe that the Q2 numbers will be “disappointing” to a bunch of people who are bullish. For context, management explicitly told everyone H1 is only about 1/3 of the FY, and that the “significantly larger ramp” starts in “Q3 as additional capacity comes online.”So, a “weak” Q2 wouldn’t be a warning signal if optical margins are soft. Really, the only number that matters is Q3 guidance and the 800G unit trajectory.If $Applied Optoelectronics(AAOI.US) guides Q3 to the 60-80% sequential growth, that just confirms 800G becoming their largest DC rev line, with 1.6T beginning to contribute. Obviously, if the Q3 guide is soft, the capacity conversion story I talked about slips, and then we rightly have to look back at management and their prior track record of overpromising / disappointing shareholders.Imo, these are the things to watch in order:1. Q3 revenue guide2. 800G revenue and unit shipments3. Gross margin vs. the 29-30% guide + any reiteration of the Y/E ~35% targetDisclosure — I have a position in $Applied Optoelectronics(AAOI.US).






















