Figures computed from official regulatory filings — .
Ownershipinsiders 33.51% · institutions 21.13% · short 0.0% of float
In USD · as of Oct 5, 2026
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Trio-Tech International, together with its subsidiaries, offers manufacturing, testing, and distribution services to the semiconductor industry in the United States, Singapore, Malaysia, Thailand, and China. It operates through two segments, Semiconductor Back-end Solutions and Industrial Electronics. The company develops and manufactures test equipment used in front-end and back-end manufacturing processes of semiconductors. It also offers equipment, which includes leak detectors, autoclaves, centrifuges, burn-in systems and boards, HAST testers, temperature-controlled chucks, and others; and develops team integrated device manufacturers and fabless semiconductor companies in the testing process. In addition, the company provides electrical, environmental, and burn-in testing services to semiconductor manufacturers in testing laboratories, and end users of semiconductors and electronic components; support the asset-light strategy of customers by setting up test facilities; and providing component level, package level and system level testing services. Further, it offers environmental chambers, leak detectors, autoclaves, centrifuges, dynamic testers, highly accelerated stress test testers, temperature-controlled chucks, and others; provides preventive maintenance, calibration services, repair services, and upgrading and refurbishment services for temperature, humidity and pressurization equipment; distributes mechanical shock, vibration testers, and other semiconductor equipment; components, such as connectors, sockets, cables, LCD displays, and touch screen panels; and invests in real estate properties; as well as offers value-added services. Trio-Tech International was incorporated in 1958 and is headquartered in Van Nuys, California.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
449 buys435 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| YONG S W | Exercise | $194K | Unusual size | SEC |
| Srinivasan Anitha | Exercise | $20.1K | SEC |
| Srinivasan Anitha | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Srinivasan Anitha | Exercise | $7.3K | SEC |
| Srinivasan Anitha | Exercise | $7.8K | SEC |
| Srinivasan Anitha | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Srinivasan Anitha | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| LIM HWEE POHtrack record | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Srinivasan Anitha | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ADELMAN JASON Ttrack record | Exercise | $217.7K | Unusual size | SEC |
| ADELMAN JASON Ttrack record | Sell | $79.2K | SEC |
| ADELMAN JASON Ttrack record | Sell | $74.4K | SEC |
| ADELMAN JASON Ttrack record | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ADELMAN JASON Ttrack record | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ADELMAN JASON Ttrack record | Exercise | $180.1K | Unusual size | SEC |
| ADELMAN JASON Ttrack record | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| ADELMAN JASON Ttrack record | Exercise | $155.2K | Unusual size | SEC |
| TING VICTOR HOCK MING | Sell | $286.4K | Unusual size | SEC |
| HOROWITZ RICHARD Mtrack record | Sell | $1.2M | Unusual size | SEC |
| ADELMAN JASON Ttrack record | Sell | $181.1K | Unusual size | SEC |
| ADELMAN JASON Ttrack record | Exercise | $89.4K | Unusual size | SEC |
| ADELMAN JASON Ttrack record | Sell | $165.7K | Unusual size | SEC |
| ADELMAN JASON Ttrack record | Sell | $74.4K | Unusual size | SEC |
| ADELMAN JASON Ttrack record | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |