Daiwa Securities stock faces a vendor data leak affecting clients

Daiwa Securities stock (ISIN JP3502200003) was last at JPY 1,761.50 on the Tokyo Stock Exchange on October 7, 2026, down JPY 11.00 or 0.62 percent from the prior close. The company is dealing with a vendor security incident that may have exposed information linked to as many as 110,000 clients.

Vendor breach reaches 110,000 clients

According to The Japan Times on October 5, Daiwa Securities Group said an external vendor found evidence of unauthorized access to its servers. The potentially exposed information included client names and account numbers.

The brokerage said the data alone cannot be used to access securities accounts or conduct online trading, and it had detected no inappropriate transactions connected with the incident. The company also said its own systems were not breached, making contractor oversight and customer communication the immediate issues for investors.

Financial base remains measurable

Paasa reported fiscal year 2026 revenue of JPY 1.5 trillion and operating income of JPY 219.5 billion for the year ended March 31, 2026. Net income reached JPY 175.3 billion, compared with JPY 154.4 billion in fiscal year 2025, a concrete year-over-year increase in the latest annual figures published for the group.

The same fiscal-year table lists earnings per share of JPY 126.04 in fiscal year 2026, compared with JPY 109.53 in fiscal year 2025. That earnings comparison gives the security incident a financial backdrop, although the vendor event itself concerns customer information rather than a reported earnings adjustment.

Stock stays below yearly high

Daiwa Securities traded within a JPY 1,756.50 to JPY 1,791.50 daily range on October 7. Its 52-week range was JPY 1,117.50 to JPY 1,898.00, placing the latest price JPY 136.50 below the yearly high while the market capitalization stood at JPY 2.4 trillion.

Paasa identified Daiwa Securities as a financial services company in the financial and capital markets industry, listed on the Tokyo Stock Exchange under ticker 8601. The group is also included in the Nikkei 225, giving the stock a broad domestic market reference beyond the individual security incident.

Next results date is October 30

Yahoo Finance lists October 30, 2026, as Daiwa Securities Group's next earnings date. That checkpoint will give investors the next formal opportunity to compare operating results with the fiscal year 2026 baseline and to assess whether the vendor incident has produced any disclosed financial effect.

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