Buffalo Inc. 6676

Company

株式会社メルコホールデングスBuffalo Inc.

Investors

Buys

Total Value

¥4.6B ($29.9M)

Avg Return

+60.99%

Last Filing

2026-05-13

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-05-13	BUY	unknown	株式会社メルコグループ	strategic	7.2M	¥2,568	-1.2%	¥18.6B ($120.0M)
2026-05-13	BUY	Market Buy	牧文	activist	85.2K	¥2,568	-1.2%	¥12M ($80K)
2026-05-13	BUY	Market Buy	牧寛之	activist	4.4M	¥2,568	-1.2%	¥271M ($1.7M)
2026-05-13	BUY	unknown	株式会社メルコグループ	strategic	7.2M	¥2,568	-1.2%	¥18.6B ($120.0M)
2026-05-13	BUY	Market Buy	牧文	activist	85.2K	¥2,568	-1.2%	¥12M ($80K)
2026-05-13	BUY	Market Buy	牧寛之	activist	4.4M	¥2,568	-1.2%	¥271M ($1.7M)
2026-03-24	BUY	unknown	株式会社メルコグループ MELCO Inc.	strategic	3.6M	¥2,465	+2.7%	¥8.9B ($57.6M)
2026-03-09	BUY	unknown	株式会社メルコグループ MELCO Inc.	strategic	3.6M	¥2,382.5	+6.2%	¥8.6B ($55.6M)
2026-03-04	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.1M	¥2,365	+7.0%	¥392M ($2.5M)
2026-03-04	BUY	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	3.6M	¥2,365	+7.0%	¥105M ($677K)
2026-02-13	BUY	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	3.6M	¥2,710	-6.6%	¥500M ($3.2M)
2025-09-09	SELL	unknown	株式会社メルコグループ MELCO Inc.	strategic	3.6M	¥1,850	-36.8%	¥1.0B ($6.6M)
2025-09-04	BUY	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	4.2M	¥1,750	+44.6%	¥1.2B ($7.7M)
2025-08-19	BUY	unknown	牧文 Aya Maki	activist	42.6K	¥1,762.5	+43.6%	¥75M ($484K)
2025-08-19	SELL	unknown	牧寛之 Maki Hiroyuki	activist	2.3M	¥1,762.5	-43.6%	¥262M ($1.7M)
2025-08-19	SELL	unknown	牧寛之 Maki Hiroyuki	activist	2.3M	¥1,762.5	-43.6%	¥262M ($1.7M)
2025-08-19	BUY	unknown	牧文 Aya Maki	activist	42.6K	¥1,762.5	+43.6%	¥75M ($484K)
2025-07-29	BUY	Market Buy	牧文 Aya Maki	activist	42.6K	¥1,148.5	+120.4%	¥7M ($47K)
2025-07-29	BUY	unknown	牧文 Aya Maki	activist	42.6K	¥1,148.5	+120.4%	¥7M ($47K)
2025-07-29	BUY	unknown	牧寛之 Maki Hiroyuki	activist	2.4M	¥1,148.5	+120.4%	¥460M ($3.0M)
2025-07-29	BUY	Market Buy	牧寛之 Maki Hiroyuki	activist	2.4M	¥1,148.5	+120.4%	¥454M ($2.9M)
2025-06-03	BUY	unknown	株式会社メルコグループ MELCO Inc.	strategic	4.2M	¥1,170.5	+116.2%	¥2.5B ($16.2M)
2025-06-03	SELL	unknown	株式会社メルコグループ MELCO Inc.	strategic	4.2M	¥1,170.5	-116.2%	¥2.5B ($16.2M)
2025-05-14	SELL	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.2M	¥1,083	-133.7%	¥389M ($2.5M)
2025-05-14	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.6M	¥1,083	+133.7%	¥164M ($1.1M)
2025-03-31	BUY	Market Buy	牧文 Aya Maki	activist	42.6K	¥1,105	+129.1%	¥5M ($33K)
2025-03-31	BUY	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	6.3M	¥1,105	+129.1%	¥522M ($3.4M)
2025-03-31	BUY	Market Buy	牧寛之 Maki Hiroyuki	activist	2.4M	¥1,105	+129.1%	¥418M ($2.7M)
2024-09-20	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.6M	¥1,907.5	+32.7%	¥3.0B ($19.3M)
2024-09-03	BUY	unknown	株式会社メルコグループ MELCO Inc.	strategic	6.5M	¥1,810	+39.8%	¥11.7B ($75.5M)
2024-07-08	SELL	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	6.5M	¥1,690	-49.8%	¥2.1B ($13.9M)
2024-07-08	BUY	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	7.7M	¥1,690	+49.8%	¥13.1B ($84.4M)
2024-07-05	SELL	unknown	株式会社メルコグループ MELCO Inc.	strategic	6.5M	¥1,725	-46.7%	¥2.2B ($14.2M)
2024-07-05	BUY	unknown	株式会社メルコグループ MELCO Inc.	strategic	6.5M	¥1,725	+46.7%	¥2.2B ($14.2M)
2024-07-04	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.8M	¥1,735	+45.9%	¥3.1B ($19.9M)
2024-07-04	SELL	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.6M	¥1,735	-45.9%	¥370M ($2.4M)
2024-04-24	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.8M	¥1,700	+48.9%	¥723M ($4.7M)
2023-11-22	BUY	Market Buy	牧文 Aya Maki	activist	42.6K	¥1,667.5	+51.8%	¥71M ($458K)
2023-11-22	BUY	Market Buy	牧寛之 Maki Hiroyuki	activist	2.3M	¥1,667.5	+51.8%	¥500M ($3.2M)
2023-08-31	BUY	Market Buy	牧文 Aya Maki	activist	42.6K	¥1,605	+57.7%	¥68M ($441K)
2023-08-31	BUY	Market Buy	牧寛之 Maki Hiroyuki	activist	2.0M	¥1,605	+57.7%	¥1.0B ($6.7M)
2023-08-31	SELL	unknown	株式会社メルコグループ MELCO Inc.	strategic	7.7M	¥1,605	-57.7%	¥1.0B ($6.7M)
2023-08-22	BUY	unknown	株式会社メルコグループ MELCO Inc.	strategic	8.4M	¥1,540	+64.3%	¥723M ($4.7M)
2023-08-22	BUY	Market Buy	株式会社メルコグループ MELCO Inc.	strategic	8.4M	¥1,540	+64.3%	¥723M ($4.7M)
2023-06-01	BUY	unknown	牧文 Aya Maki	activist	42.6K	¥1,552.5	+63.0%	¥66M ($427K)
2023-06-01	BUY	unknown	牧寛之 Maki Hiroyuki	activist	1.3M	¥1,552.5	+63.0%	¥2.0B ($13.1M)
2022-05-19	BUY	unknown	株式会社マキス Makis co,.ltd.	strategic	8.4M	¥1,775	+42.6%	¥14.9B ($96.1M)
2022-05-18	BUY	Market Buy	株式会社マキス Makis co,.ltd.	strategic	8.4M	¥1,727.5	+46.5%	¥2.8B ($18.1M)
2022-05-18	BUY	unknown	株式会社マキス Makis co,.ltd.	strategic	8.4M	¥1,727.5	+46.5%	¥2.8B ($18.1M)
2021-12-28	BUY	unknown	株式会社マキス Makis co,.ltd.	strategic	8.4M	¥1,957.5	+29.3%	¥16.4B ($106.0M)
2021-12-06	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.8M	¥1,955	+29.5%	¥3.5B ($22.5M)
2021-11-08	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	1.8M	¥2,130	+18.8%	¥3.8B ($24.5M)