The $8.8 Billion Middleman: Resonac Raised Profit Guidance 40% and Still Fell 49% From Its High

Showa Denko paid about US$8.8 billion — roughly ¥960 billion, and more than double its own market value — for Hitachi Chemical in 2019–2020. The purchase handed the business that became today's Resonac the circuit board materials franchise, the semiconductor packaging materials business and a key compound used to polish silicon wafers. Management told The Business Times in January 2023 that chip materials would reach 45% of group sales by 2030, up from 31% in 2021.

First-half 2026 results confirm the direction. Revenue rose 5.4% to ¥676.9 billion, operating income jumped to ¥87.9 billion from ¥34.5 billion, and net profit rose 146.5% to ¥48.5 billion. That is operating leverage, not accounting. It is also why the market reaction since August is so violent: the fundamentals kept improving while the share price went the other way.

Ajinomoto controls more than 95% of the global ABF build-up film market, and in May 2026 it told substrate makers it would raise prices about 30% from the third quarter. Its capacity ran at full load in the June quarter at roughly two million square metres a month. The result appears in its own numbers: first-quarter FY2026 Functional Materials sales reached 154% of the prior year and business profit 177%, and the company lifted its FY2026 business profit forecast to ¥202.0 billion.

Nittobo shows what the market thinks of upstream scarcity rent. Its gross margin of 41.7% is the best in the chain and trailing return on equity is 27.3%. Yet the shares are 64.7% below their 52-week high and fell 12.7% on November 7 alone. Strip the ¥37.8 billion of non-operating income that flattered the year to March 2026 and the headline 9.8 times earnings multiple becomes roughly 17 times trailing operating profit.

Capital is not margin. Samsung Electro-Mechanics earned a 12.4% trailing operating margin on KRW 13.3 trillion of revenue while committing KRW 6.78 trillion to capacity that does not reach mass production until September 2028. LG Innotek runs a trailing operating margin near 4% on a gross margin of 8.0%. Board makers were simply paying more: Samsung Electro-Mechanics and LG Innotek both reported laminate purchase prices up in the low-to-mid teens year on year in the third quarter of 2025, and gold plus laminate together account for close to half of printed circuit board raw material cost. Comparable price increases came from Mitsubishi Gas Chemical alongside Resonac.

Shengyi Technology, the world's second-largest laminate maker, posted a 30.4% operating margin in the September 2026 quarter — above the 29.2% core operating margin Resonac guides for its entire semiconductor and electronic materials segment. Its trailing return on equity is 39.5%, and first-half net profit rose about 130% to CN¥3.29 billion on revenue of CN¥19.03 billion. Kingboard Laminates did nearly as well: first-half operating income more than tripled to HK$3.87 billion, lifting operating margin from 12.0% to 26.0%. The margin did not accrue to Japan. It accrued to whoever owned qualified laminate capacity.

The correlation is the story. On November 7 the whole materials complex fell between 3.8% and 12.7% while the company whose demand creates the shortage rose 2.3%. Ajinomoto, the actual monopoly, was the only name in the chain to close higher. Meanwhile LME copper fell 3.2% to $13,883 a tonne, a three-month low, as the AI-stock rout weakened the outlook for data-centre materials demand. The chain is being re-priced off copper and AI sentiment, not off contract prices.

On November 5, 2026 The Japan Times reported that Mitsui Chemicals is examining a deal to buy JSR from Japan Investment Corporation for more than ¥1 trillion, with Reuters putting the figure above ¥1.3 trillion. JIC took JSR private for about ¥900 billion in 2024 and had said it wanted to reorganise Japan's semiconductor materials industry around that company. Resonac studied JSR in February 2025 and walked away. It is now a seller rather than a buyer in its own home market: Crasus Chemical was spun off in October 2026, adhesives operations in Japan, China and Taiwan were agreed for sale to Sika on October 21 with an immaterial earnings impact, and the resin moulding components business went to Moriroku in April.

Facts: laminate margins expanded across every layer in 2026, and the materials complex has been de-rated 41% to 72% from its highs while the AI chip supplier rose. Inference: the market is discounting the durability of a scarcity rent set by upstream monopolies and competed for at the laminate layer, not the demand for AI racks. Speculation: if the substrate capacity arriving in 2028 meets the demand the 2026 price increases were built on, the rent resets and 29% is a peak rather than a plateau. The cash flow is real and the moat is thinner than a 37% share suggests.