Three outsourced semiconductor assembly and test, or OSAT, companies disclosed about NT$19.2 billion in plant engineering and equipment purchases over the same week, according to public filings on Taiwan’s Market Observation Post System. ASE Technology Holding made up the bulk of that amount, with about NT$16.73 billion disclosed between Oct. 5 and Oct. 7 on behalf of its subsidiaries Siliconware Precision Industries, ASE Semiconductor and Taiwan Foresight Electronics.
The filings were published during a three-day window, but most of the reported transaction dates stretched across several months. Taiwan Foresight Electronics’ transaction with Acter started in April this year, while ASE Semiconductor’s deal with Sen Chuan Construction started in December 2025. The disclosures therefore represented cumulative transaction amounts reported at once, not orders that were all newly placed within those three days.
Siliconware disclosed eight plant engineering contracts worth more than NT$11.53 billion
The largest disclosed spending came from plant engineering projects at Siliconware. The company published six announcements on Oct. 5 and two more on Oct. 7. The eight contracts totaled about NT$11.53 billion, all described as being for production and operations.
- Acter Engineering: two contracts totaling NT$5.43 billion, including NT$4.02 billion and NT$1.41 billion
- Jhong Yuan Electro Mechanical Consultants: NT$2.32 billion
- L&K Engineering: two contracts totaling NT$1.70 billion, including NT$970 million and NT$730 million
- Han Hua Water Engineering: NT$950 million
- Kang Cheng Technology Engineering: NT$620 million
- Po Yang System Technology: NT$520 million
The six contracts announced on Oct. 5 run through the end of September 2028. The two contracts announced on Oct. 7, with Acter and L&K Engineering, were extended through the end of 2029.
ASE Semiconductor also disclosed a NT$330 million plant engineering project from Sen Chuan Construction, while Taiwan Foresight Electronics disclosed a NT$570 million plant engineering project from Acter. Both figures were listed on a pretax basis.
Equipment purchases came to about NT$4.3 billion, led by Mirle
On the equipment side, Siliconware said on Oct. 5 that it acquired seven batches of business-use machinery from Mirle Automation for NT$2.03 billion. On Oct. 7, it disclosed another seven batches of equipment from Japan’s Tazmo for NT$1.04 billion.
ASE Semiconductor said on Oct. 6 that it acquired one batch of machinery from the Singapore subsidiary of Kulicke & Soffa for a pretax NT$1.23 billion.
KYEC bought 122 sets of equipment, while PTI group disclosed NT$1.23 billion
Testing company KYEC said on Oct. 7 that it acquired 122 sets of machinery from Tokyo Electron for NT$1.25 billion, or about NT$10.25 million per unit on average. The stated purpose was production use.
PTI said on Oct. 5 that it ordered NT$560 million of packaging equipment and spare parts from Contrel Technology. A day later, its subsidiary Jinzhaocheng disclosed a NT$670 million purchase of testing equipment from Hongjun Precision. The two transactions totaled NT$1.23 billion.
Acter and Hongjun also posted strong September revenue growth
Among the counterparties in these transactions, Acter and Hongjun are also listed companies. Based on September revenue data on the Market Observation Post System, Acter posted consolidated revenue of NT$7.17 billion for the month, up 88.5% from a year earlier. The company said the increase was driven mainly by higher sales revenue and engineering revenue. Hongjun reported September revenue of NT$5.73 billion, up 100.2% year over year, saying the increase reflected stronger market demand than in the same period last year.