Sumitomo Mitsui Trust Group, Inc.TSE: 8309

Notice regarding Change of Representative Executive Officer and Representative Directors in the Sumitomo Mitsui Trust Group

Dec 23, 2025 at 7:05 AM UTC · Issued by Sumitomo Mitsui Trust Group, Inc.

To whom it may concern

December 23, 2025

Sumitomo Mitsui Trust Group, Inc. (Securities Code: 8309 TSE, NSE) Sumitomo Mitsui Trust Bank, Limited

Notice regarding Change of Representative Executive Officer and Representative Directors in the Sumitomo Mitsui Trust Group

Sumitomo Mitsui Trust Group, Inc. (Director, President & CEO: Toru Takakura, hereinafter "SuMiTG") and Sumitomo Mitsui Trust Bank, Limited (President: Kazuya Oyama, hereinafter "SuMiTB") hereby announce the following changes of Representative Executive Officer and Representative Directors.

As of April 1, 2026 (planned)

Sumitomo Mitsui Trust Group, Inc.

Reason for the Change
Change of Executive Officers and Directors, including Representative Executive Officers in SuMiTG

Change of Directors and Executive Officers, including Representative Executive Officers

New Position	Name	Current Position
Director, Chairman	Toru Takakura	Director, President & CEO (Representative Executive Officer)
President & CEO (Representative Executive Officer)	Kazuya Oyama	Executive Officer (*1)
Director	Masakatsu Sato	Director, Senior Managing Executive Officer (*1) CFO (Representative Executive Officer)
Director	Tetsuo Okubo	Director, Chairman

(*1) Executive Officers as defined in the Companies Act

Sumitomo Mitsui Trust Bank, Limited
1. Reason for the Change
  Change of Executive Officers and Directors, including Representative Directors in SuMiTB
2. Change of Directors and Executive Officers, including Representative Directors

New Position	Name	Current Position
Chairman (Representative Director)	Masakatsu Sato	Director, Senior Managing Executive Officer (*2) (Representative Director)
President (Representative Director)	Manatomo Yoneyama	Director, Senior Managing Executive Officer (*2)
Director	Kazuya Oyama	President (Representative Director)
Director	Masaru Hashimoto	Director, Chairman

(*2) Executive Officers as defined in our internal policy

End

For further information, please contact:
Investor & Shareholder Relations Department, Sumitomo Mitsui Trust Group, Inc.
Telephone	: +81-3-3286-8354

Name: Kazuya Oyama

April	1988	Joined The Sumitomo Trust and Banking Company, Limited
April	2015	Appointed as Executive Officer (*2), General Manager of Corporate Business Department IV, Tokyo of SuMiTB
January	2016	Appointed as Executive Officer (2), General Manager of Human Resources Department of Sumitomo Mitsu Trust Holdings (hereinafter "SuMiTH") Appointed as Executive Officer (2), General Manager of Human Resources Department of SuMiTB
April	2017	Appointed as Managing Executive Officer (2), General Manager of Corporate Planning Department of SuMiTH Appointed as Managing Executive Officer (2), General Manager of Corporate Planning Department of SuMiTB
April	2019	Appointed as Managing Executive Officer (1) of SuMiTH Appointed as Director, Managing Executive Officer (2) of SuMiTB
April	2021	Appointed as President of SuMiTB (Representative Director) Appointed as Executive Officer (*1) of SuMiTH
June	2021	Appointed as President of SuMiTB (Representative Director) Appointed as Director, Executive Officer (*1) of SuMiTH
June	2025	Appointed as President of SuMiTB (Representative Director) [current position] Appointed as Executive Officer (1) of SuMiTG (3) [current position]
April	2026	Appointed as President & CEO of SuMiTG (Representative Executive Officer) (*1) [New position] Appointed as Director of SuMiTB [New position]

Date of Birth: June 7, 1965 Business Experience:

(*1) Executive Officers as defined in the Companies Act (*2) Executive Officers as defined in our internal policy

(*3) Trade name was changed from Sumitomo Mitsui Trust Holdings, inc. to Sumitomo Mitsui Trust Group, inc. on October 1, 2024

Number of SuMiTG shares held: Common stock 44,941shares (As of September 30, 2025)

Name: Manatomo Yoneyama

April	1991	Joined The Sumitomo Trust and Banking Company, Limited
April	2019	Appointed as Executive Officer (2), General Manager of Corporate Planning Department of SuMiTH Appointed as Executive Officer (2), General Manager of Corporate Planning Department of SuMiTB
April	2020	Appointed as Executive Officer (2), General Manager of Corporate Planning Department and Investment Planning Department of SuMiTH Appointed as Executive Officer (2), General Manager of Corporate Planning Department of SuMiTB
April	2021	Appointed as Managing Executive Officer (1) of SuMiTH Appointed as Director, Managing Executive Officer (2) of SuMiTB
April	2023	Appointed as Managing Executive Officer (1) (2) of SuMiTH Appointed as Director, Managing Executive Officer (*2) of SuMiTB
April	2024	Appointed as Managing Executive Officer (1) (2) of SuMiTH CISO Appointed as Director, Managing Executive Officer (*2) of SuMiTB
April	2025	Appointed as Senior Managing Executive Officer (1) (2) of SuMiTG (3) CISO [current position] Appointed as Director, Senior Managing Executive Officer (2) of SuMiTB [current position]
April	2026	Appointed as President of SuMiTB (Representative Director) [new position] Appointed as Executive Officer (*1) of SuMiTG [new position]

Date of Birth: January 25, 1968 Business Experience:

(*1) Executive Officers as defined in the Companies Act (*2) Executive Officers as defined in our internal policy

(*3) Trade name was changed from Sumitomo Mitsui Trust Holdings, inc. to Sumitomo Mitsui Trust Group, inc. on October 1, 2024