DNA Chip Reserch

2397.TTSE STANDARD

Filed as DNA Chip Research Inc. (2022-06–2024-11)

Major holders (5%+) · 2

Holder	Stake	Change	Filed
Mitsui Chemicals, Inc.	68.08%	+54.23pp	2025-04-08
Mizuho Securities Co., Ltd.	7.22%	—	2025-04-22

Each holder's own ratio from its most recent large-shareholding report.

Former and minor holders (below 5%) · 1

Tokai Tokyo Securities Co., Ltd. 0.00% 2025-04-21

Ownership history · 4

Filed	Holder	Ratio	Change	Purpose
2025-04-22Amended	Mizuho Securities Co., Ltd.2025-04-22 · amended	7.22%	new	Securities trading business
2025-04-08	Mitsui Chemicals, Inc.2025-04-08	68.08%	+54.23pp	Going-private / tender offer related
2025-02-20Amended	Tokai Tokyo Securities Co., Ltd.2025-02-20 · amended	0.00%	new	Securities trading business
2024-03-29	Mitsui Chemicals, Inc.2024-03-29	13.85%	new	Strategic holding (cross-shareholding); Business / capital relationship

Each holder in 5% reports, joint holders included. Purpose is classified from the filed text.