Query Regarding Trading Activity

Submitted By (Co./ Ind. Name)

SINGAPORE EXCHANGE REGULATION PTE. LTD.

Designation

SURVEILLANCE

Query Description (Please provide a detailed description of the Query in the box below)

10 June 2022

Mun Siong Engineering Limited

Dear Sir

QUERY REGARDING TRADING ACTIVITY

We have noted, and draw to your attention, unusual volume movements in your shares today. To maintain a fair, orderly and transparent market, please answer each of the following:

Question 1: Are you (the issuer) aware of any information not previously announced concerning you, your subsidiaries or associated companies which, if known, might explain the trading? Such information may include events that are potentially material and price-sensitive, such as discussions and negotiations that may lead to joint ventures, mergers, acquisitions or purchase or sale of a significant asset. You may refer to paragraph 8 in Appendix 7.1 of the Mainboard Rules for further examples.

– If yes, the information shall be announced immediately.

Question 2: Are you aware of any possible explanation for the trading? Such information may include public circulation of information by rumours or reports.

Question 3: Can you confirm your compliance with the listing rules and, in particular, Mainboard Rule 703?

The Board of Directors shall collectively and individually take responsibility for the accuracy of the reply to that query. Please also refer to Practice Note 7.1 of the Mainboard Rules for guidelines to deal with particular situations and issues. This may include the issuance of a holding announcement, if necessary.

Please respond immediately via SGXNet. Where appropriate, you may want to request a trading halt or a suspension of trading. Please contact Securities Market Control (or, if you need to discuss the matter, your Account Manager in Listing Compliance) immediately. Thank you for your cooperation.

We have released this letter via SGXNet.

Yours faithfully

Kelvin Koh

Senior Vice President

Head of Surveillane