The largest shareholder group's holdings of Samsung SDS shares declined slightly from the previous report, to 48.90% in total.

This disclosure is a report of changes in shares held by the largest shareholder group of Samsung SDS. According to the company's filing, shares held by the largest shareholder group in this report total 37,840,922, equal to 48.90%, down 5,818 shares (-0.01 percentage points) from the previous report. The filing records that the changes came from on-market sales and on-market purchases by affiliates and individual shareholders.

1. 01

   Compared with the previous report (October 6, 2026) on the reporting date basis, total common share holdings fell by 5,818 shares.

2. 02

   Among individual changes, Samsung Life Insurance (special account) recorded both on-market sales and on-market purchases from October 2, 2026 through 10-15.

3. 03

   The filing states that Hong Ra-hee recorded on-market sales of 3,233 shares on October 15, 2026, leaving holdings at 0 shares.

4. 04

   The summary of the largest shareholder group shows Samsung Electronics with 17,472,110 shares (22.58%), Samsung C&T with 13,215,822 shares (17.08%), and Lee Jae-yong with 7,118,713 shares (9.20%).

An AI model translated the Korean summary of this filing into English; every number is carried over from the Korean original. Reference information, not investment advice.

Key figures

Total shares held by largest shareholder group in this report

37,840,922 shares (48.90%)

Total shares held per previous report

37,846,740 shares (48.91%)

Change

-5,818 shares (-0.01 percentage points)

Total issued shares

77,377,800 shares

Filing facts

Filing type

Largest Shareholder Holding Change

Report name

Report on Changes in Shares Held by the Largest Shareholder and Related Parties

Filed

Oct 16, 2026

Receipt number

20261016800882