Applied Optoelectronics is in the right place at the right time but isn't a high-quality business; it mainly serves as spillover capacity when Lumentum, Coherent and Marvell can't meet demand, so why own it over Marvell? Management also draws terrible Glassdoor reviews, 1.7 of 5 stars, 1% CEO approval and 7% recommending it across 124 reviews, pointing to high turnover and operating risk. The tone of its earnings call was also off-putting. x.com  x.com  x.com 

Lumentum's 109% year-on-year growth and sold-out capacity through 2029 make selling its AI optics exposure questionable. Bloomberg reported Marvell is in advanced talks to buy it; the appeal depends on the price, especially when holders of an $80 billion Lumentum would become holders of a $320 billion-plus Marvell growing 37%. x.com 

Applied Optoelectronics has removed a major overhang by completing its $600M ATM offering, whose mechanical selling pressure likely made it lag the optical sector. It sold 5.69M shares at an average $105.36 for $588M net, bringing 2026 ATM proceeds to about $1.7B, roughly 85% of the $2B Nvidia invested in each of Coherent and Lumentum, as it scales production. x.com  x.com 

Owning Lumentum's laser fab could secure Marvell's FY28 supply and hedge its DSP franchise as optical links shift to CPO. The rumored deal's strategy makes sense, but short-term pain is likely: at a 30% premium, roughly $17.5B in new debt and the rest in stock, rough math puts EPS dilution near 15%. It turns accretive only if Lumentum outgrows Marvell at today's guided rates for five or six more quarters, which looks achievable while the laser shortage lasts. x.com  x.com  x.com 

Lumentum, Coherent and Applied Optoelectronics remain buys amid AI optics demand: Lumentum's CEO said its AI optical parts are completely sold out through early 2029. x.com 

Applied Optoelectronics should trade above $150, in part because Lumentum's CEO says its optical components are sold out through early 2029 and it cannot meet roughly 70% of demand for some products through 2027. That industry signal strengthens the case for AAOI's expanding 800G/1.6T offerings after completion of its $600M ATM, with shares around $110. x.com 

Applied Optoelectronics' repeated at-the-market share sales keep the stock capped, a reason to trim into strength. Per @aleabitoreddit, it finished a $500M ATM in April and $600M in June, then filed another $600M in August; that much selling pressure makes it hard to break out past $100, $150 or $200 despite an operationally bullish 2027. @aleabitoreddit expects strong outperformance only if the ATMs stop. x.com 

AI bandwidth demand still favors Coherent and Lumentum, but tight customer financing can delay orders and lasting valuations need durable profits. A model provider losing share need not reduce total bandwidth use. Coherent could beat and raise guidance; Lumentum may only meet estimates this quarter, improving next quarter. If margins partly reflect scarce indium phosphide, added supply will test whether upgrades, volume and cost gains sustain earnings. These earnings calls remain forecasts. … Show more

Applied Optoelectronics has a better chance than Coherent of delivering a 300-400 mW laser with tolerable RIN and linewidth. Its transceiver capacity ramp is also larger and is not gated by Sumitomo's 6-inch InP wafers. Long AAOI against short COHR is an unnecessarily dangerous pair trade idea. x.com 

Lumentum's 49x free cash flow will look like an obvious bargain as very strong demand for its products turns into rapidly expanding free cash flow. The near-term fear that AI must pace the frontier is just a narrative. Unlike Applied Optoelectronics, which still burns meaningful cash and must raise capital from time to time, Lumentum is mature and no longer needs outside capital. The only question is how long the market takes to recognize it. x.com  x.com