Change of largest shareholder

What happened

Rifa / Change of Largest Shareholder / (2026.07.09) Change of Largest Shareholder

1. Change details Largest shareholder, etc. before the change: Jo Gyu-wan and 11 others, 2,038,660 shares, 72.80% Largest shareholder, etc. after the change: Jo Seung-hyeon and 9 others, 2,038,660 shares, 72.80%

2. Reason for the change: change of the largest shareholder due to an off-market trade among the largest shareholder and related parties 3. Purpose of the equity acquisition: strengthening control - Financing method: own funds - Plans for appointment/dismissal of executives after the acquisition: -

4. Date of change: 2026-07-08 5. Date of confirmation of the change: 2026-07-08

6. Other matters for reference in investment decisions - The date of change above is the date the share purchase agreement was executed. - The ownership ratios (%) in item 1 above and the "details of the change" below are calculated based on 2,800,000 total issued shares.

Related disclosures: 2026-07-09 Report on Changes in Shares Held by the Largest Shareholder, etc. (upon a change of the largest shareholder)

[Details of the change] Name, relationship, shares/ratio before the change, shares/ratio after the change, note: Jo Seung-hyeon, post-change largest shareholder: 56,000 / 2.00% -> 644,000 / 23.00% Jo Dong-hyeon, related party of the former largest shareholder: 42,000 / 1.50% -> 531,999 / 19.00% Jo Seo-yeon, related party of the former largest shareholder: 14,000 / 0.50% -> 84,000 / 3.00% Jo Gyu-wan, former largest shareholder: 697,173 / 24.89% -> 21,591 / 0.77% Han Suk-hyeon, related party of the former largest shareholder: 28,000 / 1.00% -> 28,000 / 1.00% Jo Ju-hyeon, related party of the former largest shareholder: 42,000 / 1.50% -> 351,162 / 12.54% Jo Sang-hyeon, related party of the former largest shareholder: 42,000 / 1.50% -> 349,275 / 12.47% Jo Hong-seok, related party of the former largest shareholder: 350,533 / 12.51% -> 533 / 0.02% Park Eun-young, related party of the former largest shareholder: 28,000 / 1.00% -> 28,000 / 1.00% Cha Seung-yeop, related party of the post-change largest shareholder: 0 / 0.00% -> 100 / 0.00% Jo Chang-hwan, related party of the former largest shareholder: 6,550 / 0.23% -> 0 / 0.00% Ihwa Sojae Co., Ltd., related party of the former largest shareholder: 640,517 / 22.87% -> 0 / 0.00% Ihwa Engineering Co., Ltd., related party of the former largest shareholder: 91,887 / 3.28% -> 0 / 0.00%