Hokkaido Electric Power

9509.TElectric Power & Gas

Major holders (5%+) · 1

Holder	Stake	Change	Filed
Mizuho Securities Co., Ltd.	10.33%	+0.53pp	2026-05-13

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

Former and minor holders (below 5%) · 10

Nomura Asset Management Co., Ltd.	3.43%	2026-07-23
Sumitomo Mitsui Trust Asset Management Co., Ltd.	2.33%	2024-05-08
Asset Management One Co., Ltd.	1.98%	2026-03-09
Nikko Asset Management Co., Ltd.	1.34%	2024-05-08
Mizuho Trust & Banking Co., Ltd.	1.28%	2026-03-09
Nomura Securities Co., Ltd.	1.07%	2026-07-23
Mizuho Bank, Ltd.	0.88%	2026-03-09
NOMURA INTERNATIONAL PLC	0.66%	2026-07-23
NOMURA SECURITIES INTERNATIONAL, Inc.	0.00%	2026-07-23
Mizuho International plc	0.00%	2026-03-09

Ownership history · 43

Filed	Holder	Ratio	Change	Purpose
2026-03-09Amended	Mizuho Bank, Ltd.2026-03-09 · amended	0.83%	+0.01pp	Business / capital relationship
2026-03-09Amended	Mizuho Trust & Banking Co., Ltd.2026-03-09 · amended	1.21%	+0.01pp	Business / capital relationship; Asset management / investment
2026-03-09Amended	Asset Management One Co., Ltd.2026-03-09 · amended	1.72%	-0.02pp	Held for clients (discretionary / trust)
2026-03-09Amended	Mizuho Securities Co., Ltd.2026-03-09 · amended	6.04%	-0.86pp	Securities trading business
2026-03-09Amended	Mizuho International plc2026-03-09 · amended	0.00%	new	Securities trading business
2026-03-09Amended	Mizuho Bank, Ltd.2026-03-09 · amended	0.82%	-0.12pp	Business / capital relationship
2026-03-09Amended	Mizuho Trust & Banking Co., Ltd.2026-03-09 · amended	1.20%	-0.17pp	Business / capital relationship; Asset management / investment
2026-03-09Amended	Asset Management One Co., Ltd.2026-03-09 · amended	1.74%	-0.38pp	Held for clients (discretionary / trust)
2026-03-09Amended	Mizuho Securities Co., Ltd.2026-03-09 · amended	6.90%	+6.80pp	Securities trading business
2025-07-07Amended	Mizuho Securities Co., Ltd.2025-07-07 · amended	0.10%	-1.02pp	Securities trading business
2025-07-07Amended	Mizuho Bank, Ltd.2025-07-07 · amended	0.94%	no change	Business / capital relationship
2025-07-07Amended	Mizuho Trust & Banking Co., Ltd.2025-07-07 · amended	1.37%	no change	Business / capital relationship; Asset management / investment
2025-07-07Amended	Asset Management One Co., Ltd.2025-07-07 · amended	2.12%	+0.19pp	Held for clients (discretionary / trust)
2025-07-07Amended	Mizuho Bank, Ltd.2025-07-07 · amended	0.94%	no change	Business / capital relationship
2025-07-07Amended	Mizuho Securities Co., Ltd.2025-07-07 · amended	1.12%	+0.05pp	Securities trading business
2025-07-07Amended	Mizuho Trust & Banking Co., Ltd.2025-07-07 · amended	1.37%	-0.01pp	Business / capital relationship; Asset management / investment
2025-07-07Amended	Asset Management One Co., Ltd.2025-07-07 · amended	1.93%	no change	Held for clients (discretionary / trust)
2025-07-07Amended	Mizuho Bank, Ltd.2025-07-07 · amended	0.94%	new	Business / capital relationship
2025-07-07Amended	Mizuho Securities Co., Ltd.2025-07-07 · amended	1.07%	new	Securities trading business
2025-07-07Amended	Mizuho Trust & Banking Co., Ltd.2025-07-07 · amended	1.38%	new	Business / capital relationship; Asset management / investment

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