Ajinomoto shares rose sharply, advancing 8.7% to ¥5,804 and reaching a 16-month high, as market participants focused on the company's prominent position in Ajinomoto Build-up Film (ABF) and its exposure to demand from the artificial intelligence semiconductor cycle.
The recent move in the stock followed Ajinomoto's May announcement of a 30% price increase for ABF, set to take effect in Q3 2026. Market attention was further drawn by the company reiterating that it can meet AI-related demand through 2030 and by its purchase of land in Gifu Prefecture for a third ABF production plant targeting a 2032 start. Ajinomoto's CEO, Shigeo Nakamura, said the timetable could be advanced if customers require earlier supply.
ABF is identified by the company as a key interlayer insulating material used in AI semiconductor packaging, and Ajinomoto's functional materials business holds a dominant share of this market. The company reported that the functional materials segment accounts for more than 95% of the global ABF market. In the fiscal year ended March 2026, that segment recorded a 35% increase in operating profit and reported margins above 50%.
Analyst coverage reflects a strong consensus view. Data show 10 Buy ratings and no Sell recommendations. Several brokerages have adjusted their view of Ajinomoto, reclassifying it from primarily a food company toward a materials supplier with exposure to AI-related semiconductor demand. Activist investor Palliser Capital has also highlighted the value of the ABF franchise, a development that helped shift investor perception earlier in the year.
Investor positioning ahead of the company's Annual General Meeting, scheduled for June 19, may have added to trading activity. At the same time, gains among Japanese stocks tied to AI-related semiconductor materials supported broader market strength, helping the Nikkei 225 reach record levels and placing Ajinomoto among the index's top performers.
On a year-to-date basis, Ajinomoto shares are trading up nearly 75% in 2026, reflecting the rerating of the company as investors weigh the revenue and margin implications of the ABF business. Market participants pointed to the ABF price increase and the company's production plans as material revenue drivers that have captured investor attention.
Market context and company position
Ajinomoto's ABF franchise is central to the recent stock move. The product's role in semiconductor packaging for AI workloads, the announced 30% price increase effective Q3 2026, and the firm public guidance on meeting demand through 2030 are specific facts that underpinned investor interest. The secured site in Gifu Prefecture for a third facility, with a targeted 2032 start and a potential for an accelerated timeline, adds a tangible production expansion plan to the narrative.
Financial and analyst signals
Financial results for the functional materials division showed substantial profit growth and high margins in the fiscal year ended March 2026, reinforcing the business's importance to overall profitability. Analyst coverage is overwhelmingly positive, with 10 Buy ratings and no Sell recommendations noted in available data.
Investor dynamics
Investor interest was amplified by activist commentary and pre-AGM positioning. The reclassification of Ajinomoto by brokerages from a food-centric company to an AI materials play contributed to share-price momentum, while broader gains in related semiconductor materials stocks supported market sentiment.
Note: All financial figures and corporate statements referenced above are those provided by the company and reported by market data; no additional forecasts or external evaluations have been introduced.