Tuas (ASX:TUA) Shares Slide Sharply: What's Spooking Investors?

Sonal Goyal

26 October 2026 04:59 PM AEDT

Tuas (ASX:TUA) Shares Slide Sharply: What's Spooking Investors?

Image Source: Shutterstock

You are reading a free article with opinions that may differ from the recommendation given by Kalkine in its paid research reports. Become a Kalkine member today to get access to our research reports, in-depth technical and fundamental research. Learn more

Start Your Free Trial Now!

Key Highlights

Tuas (ASX:TUA) shares traded at $1.26, down 31.04%, during the 26 October 2026 session.
Simba received a Notice to Show Cause from Singapore's IMDA at about 7:30pm Sydney time on 23 October 2026.
The IMDA has not reached a determination on whether action should be taken.

Tuas Ltd (ASX:TUA) shares traded at $1.26, down 31.04%, during the Trading session on 26 October 2026, while the S&P/ASX 200 index (XJO) stood at 8,805.30, up 0.11% or 10.10 points, at 2:06 pm. On the same day, the company released an ASX announcement dated 26 October 2026 covering a Show Cause Notice received by its Singapore Subsidiary Simba Telecom from the Infocomm Media Development Authority.

Tuas is a telecommunications company with operations in Singapore, and the announcement summarises the notice and the regulatory actions that the authority has identified.

Show Cause Notice (26 October 2026)

Tuas said its Wholly Owned Subsidiary Simba Telecom Pte Ltd received the notice on the evening of Friday 23 October 2026. The notice asks Simba to explain why the Infocomm Media Development Authority should not make certain findings, and states that the authority has not yet determined whether action should be taken or what it would be.

Matters raised by the IMDA

The allegations summarised include deployment of dynamic spectrum sharing at about 133 sites in 2022 and 2023, allowing 2100 MHz spectrum to be used for both 4G and 5G when only 5G use was authorised; use of 2340-2360 MHz spectrum at about 92 sites between 2023 and 2026 without authorisation; and that this use was intentional and approved by senior management. They also include deployment of 5G indoor equipment at two locations in 2023 before authorisation was given on 14 November 2023, a breach of a production order, and concerns about governance and compliance culture.

The IMDA has identified potential regulatory actions, including orders under the radio-communication regulations to suspend or cancel spectrum rights, and has asked Simba to make representations on why they should not be taken.

About Tuas

Tuas Limited (ASX:TUA) is headquartered in Macquarie Park, New South Wales, and operates its telecommunications Business in Singapore through Simba Telecom, a facilities-based mobile operator.

Related sector context

Telecommunications operators in Singapore are licensed by the IMDA, which authorises the use of spectrum bands and can impose conditions or sanctions. The notice concerns spectrum use and compliance matters under that licensing framework.

The XJO was up 0.11% at 2:06 pm on the day.

Risks to weigh in

The IMDA has not yet decided whether to act, so the outcome and any penalty or licence condition are unknown. The allegations include intentional conduct and governance concerns, and potential actions include suspension or cancellation of spectrum rights.

Catalysts on watch

Items to follow include Simba's response to the notice, any IMDA determination, further disclosures from Tuas on the process and any change to licence conditions.

Final word

Tuas (ASX:TUA) traded 31.04% lower during the 26 October 2026 session, while its announcement, dated 26 October 2026, disclosed the IMDA Show Cause Notice and the potential actions identified.

FAQs

Q: How did Tuas (ASX:TUA) shares trade on 26 October 2026?

A: Shares traded at $1.26, down 31.04%, during the trading session, while the S&P/ASX 200 was up 0.11% at 2:06 pm.

Q: What did Tuas (ASX:TUA) announce?

A: That Simba Telecom received an IMDA Notice to Show Cause on 23 October 2026.

Q: Has the IMDA made a decision?

A: No. The notice says the IMDA has not reached a determination on whether action should be taken.

Download Free Report – Explore 3 Stock Ideas & Industry Insights

Unlock 3 stock ideas and key industry insights in our free report. This information is general in nature and does not consider your personal objectives, financial situation, or needs. It is not financial advice.

All investments involve risk—consider independent advice before making any investment decisions.

View 3 Research Reports

Disclaimer:

This article (“Article”) has been prepared by Kalkine Pty Limited (ABN 34 154 808 312) (Australian financial services licence number 425376) (“Kalkine”) and its related bodies corporate who are authorised to provide general financial product advice. Kalkine.com.au and its associated pages are published by Kalkine.

Any information/advice provided in this article is general in nature and does not take into account your objectives, financial situation or needs. You should therefore consider whether the information is appropriate for your objectives, financial situation and needs before acting upon it.

There may be a Product Disclosure Statement, Information Memorandum or other offer document (“Offer Document”) for the securities or other financial products referred to in Kalkine articles. You should obtain a copy of the Offer Document and consider it before making any decision about whether to acquire the security or financial product.

Kalkine strongly recommends that you seek advice from a financial adviser, stockbroker or other professional (including taxation and legal advice) before acting on any advice/information in this Article or on the Kalkine website. Not all investments are appropriate for all people.

The information in this Article and on Kalkine website has been prepared from a wide variety of sources, which Kalkine, to the best of its knowledge and belief, considers accurate. Kalkine has made every effort to ensure the reliability of the information contained in its articles (including this Article), newsletters and websites. All information represents our views at the date of publication and may change without notice.

The information in this Article does not constitute an offer to sell securities or other financial products or a solicitation of an offer to buy securities or other financial products.

Kalkine does not issue, sell or deal in any financial products.

This Article may contain information on past performance of particular investments. Please note past performance is neither an indicator nor a guarantee of future performance.

To the extent permitted by law, and excluding any dishonesty or gross negligence by Kalkine, Kalkine disclaims and excludes all liability for any direct, indirect, implied, punitive, special, incidental or other consequential loss or damage arising from the use of or reliance on this Article, the Kalkine website and any information published on the Kalkine website without any warranties or representations by Kalkine to you. To the extent the law prohibits or limits this exclusion, Kalkine limits its liability to the resupply of services.

Please also read our Terms & Conditions and Financial Services Guide for further information.

Employees and/or associates of Kalkine and its related entities may hold interests in the securities or other financial products covered in this Article or on the Kalkine website. Any such employees and associates are required to comply with certain safeguards, procedures and disclosures as required by law.

Some of the images/music that may be used in the Article are copyright to their respective owner(s). Kalkine does not claim ownership of any of the pictures displayed/music used in the Article unless stated otherwise. The images/music that may be used in the Article are taken from various sources on the internet, including paid subscriptions or are believed to be in public domain. We have used reasonable efforts to accredit the source wherever it was indicated or was found to be necessary.

Kalkine Media Pty Ltd, an affiliate of Kalkine Pty Ltd, may have received, or be entitled to receive, financial consideration in connection with providing information about certain entity(s) covered on its website.