AAON is quietly turning from a traditional HVAC maker into an AI infrastructure play through data center cooling, as the AI capex bottleneck shifts beyond compute to cooling and power. This quarter it beat EPS estimates by 64% and revenue by 30%, raised FY26 revenue growth guidance to 40-45%, and posted a record backlog with improving margins. An 18-month weekly base, a high-volume earnings gap and strong institutional buying add to the case. It is overlooked next to Vertiv and Modine. x.com 

AAON offers data-center cooling exposure growing more than twice as fast as Vertiv at the same forward P/E: its BASX data center brand grew 216% last quarter and is now half the company. AAON trades at 30.2x forward earnings, growing 55-60% with a $2B backlog up 98%, versus Vertiv at 31.8x growing 23%. Its record-low multiple reflects costs at a new Memphis plant not yet full, while BASX margins rose to 30%. It is the earlier, riskier name, with three customers and a plant to fill. x.com 

AAON is a favorite HVAC stock and one of the best long-term compounders, rising over 20% a year for 20 years, and jumped 43% on earnings today. There is speculation that Amazon's proprietary data-center liquid cooling uses AAON, which should lift the stock if confirmed. It is volatile around earnings, so a 20% drop next time would be a chance to buy. x.com 

Applied Optoelectronics looks set for its next leg as AI data-center transceiver demand outstrips supply. Q2 EPS was $0.06 versus $0.02 expected and revenue rose 86.3% to $191.92M, a fifth straight record. Management guides to about $1.1B of 2026 revenue as a new Texas facility ramps capacity. The stock has formed a rounding bottom since September and is curling back through its 200 EMA; the trigger is $116.90. x.com 

Applied Optoelectronics is a domestic AI data-center bottleneck winner whose results show exponential operating leverage. EPS jumped 186% quarter over quarter and 138% year over year on an 86% revenue surge, as 800G transceiver economics improve with its Texas and Taiwan fabs reaching prime yields. With the US tightening restrictions on Chinese optical supply chains and the FCC banning new Chinese data-center hardware, hyperscalers are flooding it with high-margin orders. x.com 

Arista Networks' double-beat quarter shows AI data-center networking demand remains very strong. Q2 revenue was $3.036 billion versus $2.818 billion expected, its first quarter above $3 billion, up 37.7% year over year; adjusted EPS was $1.02 versus $0.89, and adjusted operating margin 49.9% versus 46.8%. Q3 margin guidance of 48-49% also beat the 46.6% consensus. The weekly chart keeps making higher highs and lows, and after hours broke the trendline linking its 2025 and April 2026 highs. x.com 

EnerSys looks mispriced at about 15x forward earnings versus 23-31x for electrical equipment peers like nVent, Eaton and Hubbell riding the same AI power demand. It has beaten earnings 10 straight times, generated about $717M of free cash flow in 12 months, a near 10% yield, and lifted gross margin over 500 bps to 33.5%. Data center orders rose over 80% and defense revenue 24%. A third of adjusted earnings comes from a US tax credit that phases down after 2030; forklift batteries remain soft. … Show more

Alpha and Omega Semiconductor's pivot to AI data-center power is gaining traction beneath muted overall revenue. AI-focused power delivery in its advanced computing division grew over 40% year over year and doubled sequentially, and CEO Stephen Chang reports rising demand from hyperscalers and supercomputing operators. High-margin power ICs grew 30% to nearly 40% of product sales. Insider selling and valuation froth may cause volatility, and second-half results need to validate AI growth. x.com 

Allegro MicroSystems just returned to profitability after a massive increase in data-center income and 125% EPS growth in its last report. The stock is holding a two-month pullback at its 200-day moving average with its lowest MACD reading since the April tariff low, and the chart pattern is bullish on a breakout. x.com  x.com 

MaxLinear's post-earnings reaction looks like an overreaction to solid growth. Q2 revenue rose 55% to $168.8M, infrastructure grew 145%, and adjusted operating margin expanded to 22.3% from 15.9%. Q3 guidance of $210-220M implies another ~27% sequential jump, 2026 optical data-center revenue guidance was raised again to $190-210M from $150-170M, and 1.6T products are in customer qualification. x.com