Daishin Securities
Daishin Securities is a listed securities company in Seoul. It began in 1962 as Samrak Securities and was renamed and listed in 1975 after Yang Jae-bong acquired it, and its subsidiaries include a savings bank, an asset manager and a private equity arm. In October 2026 it disclosed that a server linked to online account opening had been hacked, exposing personal and financial information of 38,490 customers.
Contents7 sections
Key facts
1962–1975Founding and Renaming
Daishin Securities began as Samrak Securities, founded in 1962 and renamed Jungbo Securities in 1968; Yang Jae-bong acquired it on his own in April 1975, renamed it Daishin Securities and listed it in October that year.[1]
The company gives its establishment date as June 20, 1962, and its listing date as October 1, 1975.[2]
1980–1997Electronic Trading and Overseas Offices
In July 1980 it became the first in the industry to connect all its branches online; in 1984 it opened the industry’s first Tokyo office; and in 1997 it launched the CYBOS home-trading system.[1]
2011–2014Building a Financial Group
It launched Daishin Savings Bank in August 2011, unveiled the Daishin Financial Group in June 2012 and set up Daishin Private Equity and other subsidiaries in 2014.[3]
2024–2026Comprehensive Financial Investment Business Entity
In December 2024 it was designated a Comprehensive Financial Investment Business Entity; its equity capital passed 4 trillion won in December 2025, and in February 2026 it announced the cancellation of more than 15 million treasury shares.[3]
October 2026Data Breach Affecting 38,490 Customers
On October 28, 2026, Daishin Securities said hackers had gained unauthorized access to a server linked to its online account-opening service, exposing personal and financial information of 38,490 customers. It detected suspicious activity on October 17 and then examined more than 60,000 requests disguised as legitimate traffic over a 10-day period.[4]
The company said it had found no signs of secondary damage or of hackers illegally accessing its core operational systems so far, and planned to notify affected customers individually; the Financial Supervisory Service sent an on-site inspection team to the company.[5]
The same day Financial Supervisory Service Governor Lee Chan-jin urged financial firms to strengthen IT security, saying simultaneous attacks would become routine as AI is used for hacking.[5]
Current Operations
Daishin Securities’ main businesses include dealing, brokerage, underwriting, investment trusts and asset management. It had 1,444 employees as of June 30, 2026, and a network of 34 domestic branches; its subsidiaries include Daishin Savings Bank, Daishin Asset Management and Daishin Asset Trust.[2]
Sources
- 대신증권㈜ - 한국민족문화대백과사전 (opens in a new window) (in Korean)
- Company Overview (opens in a new window)
- Company History (opens in a new window)
- Cyberattack wave widens across Korean financial sector (opens in a new window)
- Bithumb, Mirae Asset, and Daishin Securities Breached as Financial Sector Hacking Spreads (opens in a new window)