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Kazumasa Okubo
Positions · 1
Company
Stake
Filed
Japan Electronic Materials
6855
9.81%
2026-03-12
Filings · 3
Thu, Mar 12 · JST
1 filing
16:29
5% STAKE
6855
Japan Electronic Materials
· Kazumasa Okubo + 6 joint holders · 6.00% → 9.81%
+3.81pp
Wed, Sep 4 · JST
1 filing
10:23
5% STAKE
6855
Japan Electronic Materials
· Kazumasa Okubo + 6 joint holders · 9.77% → 6.00%
−3.77pp
Wed, Aug 14 · JST
1 filing
17:06
5% STAKE
6855
Japan Electronic Materials
· Kazumasa Okubo + 4 joint holders · 10.96% → 9.77%
−1.19pp