Mamiya-OP Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of 7991?
Owner Type	Number of Shares	Ownership Percentage
Public Companies	65,000	0.629%
Individual Insiders	243,800	2.36%
Institutions	830,622	8.04%
VC/PE Firms	1,406,500	13.6%
General Public	3,537,210	34.2%
Private Companies	4,245,100	41.1%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 22 shareholders own 66.23% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
38.5%	Data-Art, Inc.	3,974,700	JP¥6.5b	0%	no data
13.6%	Ambition Capital LLP.	1,406,500	JP¥2.3b	149%	no data
2.51%	Matsui Securities Co., Ltd.	259,400	JP¥422.3m	0%	1.2%
2.23%	J-NET Co., Ltd.	230,400	JP¥375.1m	0%	no data
1.44%	Takeshi Sasaki	148,900	JP¥242.4m	0%	no data
1.37%	Rakuten Investment Management, Inc.	142,000	JP¥231.2m	0%	0.05%
1.11%	SBI Holdings, Inc.	114,944	JP¥187.1m	0%	0.02%
0.83%	Japan Securities Finance Co., Ltd.	85,900	JP¥139.8m	0%	0.02%
0.83%	Tokio Marine Asset Management Co., Ltd.	85,380	JP¥139.0m	0%	no data
0.74%	Sumitomo Mitsui Financial Group, Inc.	76,498	JP¥124.5m	0%	no data
0.69%	Dimensional Fund Advisors LP	71,100	JP¥115.8m	6.92%	no data
0.63%	SAXA, Inc.	65,000	JP¥105.8m	0%	no data
0.47%	Satoshi Suzuki	48,600	JP¥79.1m	0%	no data
0.43%	American Century Investment Management Inc	44,300	JP¥72.1m	80.8%	no data
0.39%	Fukuda Shoji, Ltd.	40,000	JP¥65.1m	0%	no data
0.39%	Masayuki Nakamura	40,000	JP¥65.1m	0%	no data
0.026%	Takanori Shinoda	2,700	JP¥4.4m	0%	no data
0.0097%	Fujiya Mizutani	1,000	JP¥1.6m	0%	no data
0.0087%	Yuzo Takada	900	JP¥1.5m	0%	no data
0.0077%	Masao Sekiguchi	800	JP¥1.3m	0%	no data
0.0068%	Makoto Fukuda	700	JP¥1.1m	0%	no data
0.0019%	Tsunehiro Higuchi	200	JP¥326.2k	0%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/11/26 23:08
End of Day Share Price	2025/11/26 00:00
Earnings	2025/09/30
Annual Earnings	2025/03/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Mamiya-OP Co., Ltd. is covered by 0 analysts. 0 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.