Trio-Tech (NASDAQ: TRT) CEO details 16.9% stake and 80,111-share option exercise

Rhea-AI Filing Summary

Trio-Tech International filed an amended ownership report showing that CEO, President and Chairman Siew Wai Yong beneficially owns 1,470,290 shares of common stock, including options, equal to about 16.9% of the company’s outstanding shares as of November 1, 2025.

The total includes options to purchase 210,043 shares that are exercisable within 60 days of the report date. On January 27, 2026, Mr. Yong exercised an option to acquire 80,111 shares at an exercise price of $2.64 per share. He states he holds the shares for investment and currently has no plans for major corporate actions.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)

TRIO-TECH INTERNATIONAL

(Name of Issuer)

Common Stock, no par value

(Title of Class of Securities)

896712205

(CUSIP Number)

Siew Wai Yong
7 Pandan valley, 16-502 Poinciana Tower,
Singapore, U0, 597631
(65) 6265 3300

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

01/27/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No. 896712205

1

Name of reporting person

YONG SIEW WAI

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

SINGAPORE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,470,290.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 1,470,290.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

1,470,290.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

16.9 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

(1) Includes 1,260,247 shares of the Issuer's common stock, no par value ("Common Stock") and options to purchase 210,043 shares of Common Stock exercisable within 60 days of the date of this report. (2) Based on 8,701,110 shares of the Common Stock issued and outstanding as of November 1, 2025, based on the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on November 14, 2025.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, no par value
(b)	Name of Issuer: TRIO-TECH INTERNATIONAL
(c)	Address of Issuer's Principal Executive Offices: Block 1008 Toa Payoh North, Unit 03-09, Singapore, SINGAPORE , 318996.
Item 1 Comment: This Amendment No. 2 ("Amendment") to Schedule 13D amends and supplements the statement on 13D originally filed on June 3, 2010, as amended April 6, 2023, by furnishing the information set forth below. Except as otherwise specified in this Amendment, all previous Items are unchanged. Capitalized terms used herein which are not defined herein have the meanings given to them in the Schedule 13D, as previously amended, filed with the Securities and Exchange Commission ("SEC").
Item 2.	Identity and Background
(a)	This Schedule 13D is being filed by Siew Wai Yong, an individual.
(b)	The address of the Reporting Person for this filing is: 7 Pandan valley, 16-502 Poinciana Tower, Singapore 597631.
(c)	Mr. Yong has served as a director, Chief Executive Officer and President of the Company since 1990 and was elected Chairman of the Board in September 2023. He joined Trio-Tech International Pte. Ltd. in Singapore in 1976 and was appointed as its Managing Director in August 1980.
(d)	The Reporting Person was not, during the last five years, convicted of a criminal proceeding (excluding traffic violations or similar misdemeanors).
(e)	The Reporting Person was not, during the last five years, a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
(f)	Mr. Yong is a citizen of Singapore.
Item 3.	Source and Amount of Funds or Other Consideration
	The securities reported herein include shares that were acquired by the Reporting Person through grants of shares by the Issuer from time to time. Of the 1,470,290 shares deemed beneficially owned by Mr. Yong, 210,043 are subject to currently exercisable options. Mr. Yong acquired the remaining shares deemed to be beneficially held by him through the use of personal funds.
Item 4.	Purpose of Transaction
	Mr. Yong holds the shares of Company Common Stock beneficially owned and deemed to be beneficially owned by him for investment. The Reporting Person has no current plans or proposals which relate to or would result in any of the matters described in paragraphs (a) though (j) of Item 4 of Schedule 13D. Mr. Yong may in the future acquire additional shares of Common Stock or other Issuer securities or dispose of some or all of the shares of Common Stock or other securities held by the Reporting Person in open-market transactions or privately negotiated transactions, on such terms and at such times as the Reporting Person may deem advisable subject to applicable securities law and regulations.
Item 5.	Interest in Securities of the Issuer
(a)	Mr. Yong may be deemed to beneficially own an aggregate of 1,470,290 shares of the Issuer's common stock, including 210,043 options to purchase shares of Common Stock (the "Options") exercisable within 60 days of the date of this report, representing approximately 16.90% of the Issuer's shares of common stock outstanding. The percentage of ownership of shares set forth in this Schedule 13D is based on 8,701,110 shares of Common Stock outstanding as of November 1, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 14, 2025.
(b)	Sole power to vote: 1,470,290 Shared power to vote: 0 Sole power to dispose: 1,470,290 Shared power to dispose: 0
(c)	On January 27, 2026, Mr. Yong exercised an option to acquire 80,111 shares of common stock at an exercise price of $2.64.
(d)	None.
(e)	Not applicable
Item 6.	Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
	None.
Item 7.	Material to be Filed as Exhibits.
	Not applicable.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

YONG SIEW WAI

Signature:	/s/ Siew Wai Yong
Name/Title:	Siew Wai Yong
Date:	01/29/2026

FAQ

How many Trio-Tech (TRT) shares does Siew Wai Yong beneficially own?

Siew Wai Yong beneficially owns 1,470,290 Trio-Tech common shares, including options. This represents about 16.9% of outstanding shares based on 8,701,110 shares reported as of November 1, 2025 in the company’s Form 10-Q filed on November 14, 2025.

What percentage of Trio-Tech (TRT) does Siew Wai Yong control according to this filing?

According to the amended ownership report, Siew Wai Yong beneficially owns approximately 16.9% of Trio-Tech’s outstanding common stock. This percentage is calculated using 8,701,110 shares outstanding as of November 1, 2025, as disclosed in Trio-Tech’s Quarterly Report on Form 10-Q.

How many Trio-Tech (TRT) options does Siew Wai Yong hold and are they exercisable?

The filing states that Siew Wai Yong holds options to purchase 210,043 Trio-Tech common shares that are exercisable within 60 days of the report date. These options are included in his total beneficial ownership of 1,470,290 shares, representing 16.9% of the company.

What recent Trio-Tech (TRT) stock transaction did Siew Wai Yong make?

On January 27, 2026, Siew Wai Yong exercised an option to acquire 80,111 Trio-Tech common shares at an exercise price of $2.64 per share. This transaction is specifically highlighted in the interest in securities section of the amended beneficial ownership statement.

What is Siew Wai Yong’s stated purpose for holding Trio-Tech (TRT) shares?

The filing explains that Siew Wai Yong holds his Trio-Tech common stock for investment purposes. It further notes he currently has no specific plans or proposals related to major corporate actions, though he may buy or sell shares in the future subject to applicable securities laws.

What roles does Siew Wai Yong hold at Trio-Tech (TRT)?

Siew Wai Yong serves as a director, Chief Executive Officer and President of Trio-Tech International, and he was elected Chairman of the Board in September 2023. The filing also notes his long tenure with the company’s Singapore subsidiary, where he became Managing Director in August 1980.