Notice of System Disruption due to Ransomware Attack (3rd Report)

November 21, 2025

TEIN, INC.

We would like to provide updated information on the ransomware cyber-attack that we, TEIN, have suffered, following the first report dated October 31 and the second report dated November 7. As far as the business operation is concerned, we are now able to undertake routine practice and activities with little or no difficulty.

Data/Information Leakage

No such leakage has been confirmed so far, but we are still conducting continuous investigation.

We sincerely apologize to all our customers and partners for any inconvenience and trouble caused by this case. We will further investigate and review the issues and take necessary measures to establish and provide safe network environment.

Notice of System Disruption due to Ransomware Attack (2nd Report)

November 7, 2025

TEIN, INC.

We, TEIN, INC., made announcement on October 31 that our main server was experiencing disruption due to ransomware infection.

Following the detection of the incident, we have been conducting thorough investigations and through which it is confirmed that our server was under cyber-attack by ransomware.

We are still carrying out further investigations to uncover the entire picture of the incident and the damages sustained. While at the same time, we are focusing on early restoration and resumption of the entire system and normal business operation.

The information we can disclose as of this point in time is as follows.

Production/Manufacturing Activities

The system disruption forced our subsidiary factory in China (TEIN Shock Absorber Manufacturing (Jiangsu) Co., Ltd.) to close for 1 week from November 3 and HQ factory in Japan to halt production for 1 day. We are planning to compensate such by operating on weekends and we expect the impact to be minimal.

We have made individual arrangements with our suppliers to ensure procurement of materials with little or no effect.

*Details and extent of impact will be furnished to those affected, as such information becomes available.

Sales Activities

Our order/shipping system runs entirely on the separate server and it was not hit by this incident at all. However, we have experienced a slight delay in operations, since the internal system was shut down. We are now able to process orders and arrange deliveries as usual.

Payment and Settlement

The incident did not have any impact on processing funds and we are operating normally.

External Communications

We are currently using telephone lines and e-mails as means of communication as usual. We assure that e-mails can only be sent from and received on the devices that are safe and free from ransomware infection. Due to partial limitations/restrictions currently in place, some delay in responding may be expected.

We are yet to confirm the possibility of personal and customer data exposure and the extent of damages caused by such data leakage, internally or externally. We will inform all concerned parties, as soon as the details are confirmed.

We sincerely apologize for any inconvenience caused by this recent incident.

Notice of System Disruption due to Ransomware Attack

October 31, 2025

TEIN, INC.

We are currently experiencing system disruption due to ransomware attack on the company's main server.

Since all group companies rely on the same system, this disruption is seriously affecting the daily business operations group wide.

We are closely working with law enforcement and relevant authorities, with support from outside experts, to investigate the extent of the impact, including the possibility of leakage of personal and customer data, and to restore the system.

We sincerely apologize for any inconvenience and difficulties this attack may cause to our customers and partners.