Trio-Tech International
TRT- Exchange
- Nasdaq
- Industry
- Special Industry Machinery, NEC
- SEC CIK
- 0000732026
No open-market purchases or sales by Trio-Tech International insiders were filed in the last 90 days; 35 institutions reported holding it in 13F filings for Q2 2026, worth $26.9M in total; no superinvestor holds it.
Holders of 5% or more of TRT
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Trio-Tech International, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Yong Siew Wai | 13D/A | 16.90%1.47M shares | – | Jan 29, 20261 filing | Jan 29, 2026 | SEC |
| Zeff Capital, LP | 13G/A | 5.90%511.2K shares | −1.00 ppfrom 6.90% | Oct 1, 20243 filings | Jan 21, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on Trio-Tech International, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jan 29, 202612:30 PM ET | Yong Siew Wai | 13D/A | 16.90%1.47M shares | – | Jan 27, 2026 | SEC |
| Jan 21, 20261:53 PM ET | Zeff Capital, LPand 2 others | 13G/A | 5.90%511.2K shares | −1.00 ppfrom 6.90% | Dec 31, 2025 | SEC |
| Jan 8, 20252:54 PM ET | Zeff Capital, LPand 2 others | 13G/A | 6.90%295.0K shares | +1.60 ppfrom 5.30% | Dec 31, 2024 | SEC |
| Oct 1, 20247:35 PM ET | Zeff Capital, LPand 2 others | 13G | 5.30%225.6K shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Trio-Tech International shares.
No Form 144 notices for Trio-Tech International are on file.