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YMAT
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Overview
Overview
News
News
Posts
Posts
Financials
Financials
Forecast
Forecast
Valuation
Valuation
Shareholders
Shareholders
Profile
Profile
All Shareholders
Institutional Holders
Insiders
All Shareholders
Shareholder Type
Individuals & Insiders
83.44%
Public and others
16.30%
Institutions
0.26%
Major Shareholders
Latest
Major Shareholders Latest
Shareholder
% Held
Shares Held
Change %
Shares Changed
Report Date
Jing-Bin Chiang
CEO & Chairman of the Board
40.63%
1.63M
5.19%
+410.00K
05/18/2026
Bo-Wei Lee
15.12%
606.37K
2.51%
+0
07/31/2025
Yu-Ning Chiang
13.47%
540.00K
2.23%
+0
07/31/2025
Li-Hsin Yu
8.58%
343.97K
1.42%
+0
07/31/2025
Ping-Hong Lin
Independent Director
1.20%
48.00K
0.20%
+0
03/18/2026
Shen-Huei Wang
Independent Director
1.20%
48.00K
0.20%
+0
03/18/2026
Ting-Pang Sung
Director
1.20%
48.00K
0.20%
+0
03/18/2026
Ching-Chou Huang
Independent Director
1.20%
48.00K
0.20%
+0
03/18/2026
Sam Van
Advisor to Board & Management Team
0.85%
34.23K
0.14%
+0
03/18/2026
XTX Markets Limited
0.10%
4.14K
0.02%
+1.35K
06/30/2026
Tower Research Capital Europe Limited
0.07%
2.70K
--
+2.70K
06/30/2026
Sterne Agee Asset Management, Inc.
0.06%
2.44K
--
+2.44K
06/30/2026
UBS Asset Management AG
0.03%
1.19K
0.03%
+1.19K
06/30/2026
Citadel Advisors LLC
0.00%
0.00
0.13%
-4.43K
06/30/2026
