Ultra Clean's earnings outlook and valuation leave it with the cleanest upside in semiconductors despite an ATM overhang. After a 67% stock correction, it trades at 8-10x forward EPS a few years out and is expected to generate $500M in EBITDA over the next three years. The ATM could dilute shares by 2% per quarter for two quarters; discounted 0% 2031 converts and potential convert buybacks offer a path to deleveraging. x.com 

Topco Scientific is cheap at about 15x earnings because it is a decent company riding a tailwind, and it still has legs after starting to run. It is Shin-Etsu's primary agent for semiconductor materials such as silicon wafers and photoresists in Taiwan and parts of China, and has a silicone JV with Shin-Etsu. Management expects double-digit revenue growth this year, with exposure to CMP slurries, water treatment and advanced packaging. Such companies tend to outperform with half the volatility. … Show more

ACM Research is breaking out cleanly from a big base on strong earnings and theme momentum, the combination behind some of the biggest winners. It builds the tools that clean and process wafers in every chip factory, yet remains one of the least talked-about names. x.com 

Soitec's Q1 shows AI data-center demand for its Photonics-SOI wafers is now driving results. Photonics-SOI sales doubled to over half the €65M Edge and Cloud AI segment, revenue rose 23% to €113M versus 15% guidance, and Q2 guidance is 30%+ growth against 4% consensus. Per BofA, Soitec says the wafer is in every new AI data center past 800G. More than 10 customers hold deposit-backed capacity reservations past FY2027. Margins lag as fab loading fell to 48% and €30M of EU subsidies roll off. … Show more

Shin-Etsu Chemical is the smarter way to play wafer-fab expansion because it holds a duopoly in EUV photoresists, and more advanced logic means more EUV layers and therefore more photoresist. ASML is a weaker play: when TSMC shifts capacity, that is the last machine it expands orders for, and any increase is incremental to ASML's bottom line. Shin-Etsu is the only wafer-fab-equipment-adjacent holding. x.com  x.com 

Topco Scientific is hard to go wrong with, thanks to really competent management and how far it has come in the past five or six years on the back of semiconductor supply chain shifts. Per @Blinklebloop, it is Shin-Etsu's primary agent for silicon wafers and photoresists in Taiwan and parts of China, looks relatively cheap at about 15 times earnings for its supply chain position, and management expects double-digit revenue growth this year. x.com 

RS Technologies is a business that wins regardless and is undervalued today, as the world's leading semiconductor wafer recycler with about 33% share and TSMC and Sony as anchor customers. Its reclamation service, at a 38% operating margin, is needed at every step of chip production, a toll booth independent of any single technology. Its GRITEK stake plus net cash nearly equal its ~159bn yen market cap, leaving the core almost free at ~16x EV/owner FCF, or ~10x adjusted. x.com 

Soitec holds a monopoly on the Photonics SOI wafers the AI photonics trade runs through, yet trades at just 3.6x forward EV/revenue. Silicon photonics chips in AI data centers, from transceivers to Nvidia switches and Broadcom ASICs, are built on it via its proprietary Smart Cut process; GlobalWafers exits by 2027 and Shin-Etsu sells little. Optical interconnect grows from about $10 billion to over $70 billion by 2030, and top customer Tower Semiconductor targets 5x capacity by end-2026. x.com 

As compute becomes a commodity, supplier-agnostic toolmakers in deposition, etch, bonding, probe, burn-in, test and metrology may be the real winners. CME and ICE are moving to list GPU rental-rate futures, and big tech now contracts compute in dollars and gigawatts. Per @PhotonCap, that contracted compute eventually becomes wafer starts, benefiting FormFactor, Aehr, Keysight, Teradyne, Advantest, Aixtron, Veeco, Riber, IQE and AXT no matter who wins at the chip level. x.com