Who has been buying IPS, Inc. stock?

5 distinct investors have filed 10 disclosed large-shareholding filings in IPS, Inc. (4390), most recently on 2026-01-16. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does IPS, Inc. have?

IPS, Inc. has 10 buy-side and 11 sell-side disclosures on record, covering ¥1.1B ($7.2M) in total reported value, spanning 2021-04-07 to 2026-01-16.

Where does StockDrifts get IPS, Inc. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

IPS, Inc. 4390

Company

株式会社アイ・ピー・エスIPS, Inc.

Investors

Buys

Total Value

¥1.1B ($7.2M)

Avg Return

+32.20%

Last Filing

2026-01-16

IPS, Inc. (4390) has 10 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥1.1B ($7.2M) in reported transaction value. The earliest filing StockDrifts holds for IPS, Inc. is dated 2021-04-07; the most recent is 2026-01-16. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is +32.20%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-06-26	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥3,305	-5.0%	¥35M ($223K)
2026-05-21	SELL	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	870.2K	¥3,895	+6.0%	¥632M ($4.1M)
2026-01-16	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥3,175	+0.9%	¥299M ($1.9M)
2026-01-16	BUY	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥3,175	-0.9%	¥299M ($1.9M)
2024-07-19	SELL	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	1.0M	¥2,305	-36.4%	¥338M ($2.2M)
2023-11-21	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥2,115	-48.7%	¥5M ($35K)
2023-07-24	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥2,332	-34.9%	¥3M ($19K)
2023-06-30	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥2,336	-34.6%	¥3M ($19K)
2023-06-21	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	1.1M	¥2,423	+29.8%	¥416M ($2.7M)
2023-06-21	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥2,423	-29.8%	¥3M ($19K)
2023-03-22	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	951.9K	¥2,341	+34.3%	¥376M ($2.4M)
2022-12-27	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥2,770	-13.5%	¥3M ($22K)
2022-11-22	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥3,100	-1.4%	¥50M ($323K)
2022-09-06	SELL	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	789.0K	¥3,000	-4.8%	¥384M ($2.5M)
2021-11-19	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co.,Ltd.	other	916.6K	¥2,180	+44.3%	¥597M ($3.9M)
2021-11-04	SELL	unknown	宮下幸治 Koji Miyashita	strategic	5.6M	¥1,856	-69.5%	¥242M ($1.6M)
2021-10-22	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	191.2K	¥1,980	+58.8%	¥64M ($412K)
2021-10-22	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	402.2K	¥1,980	+58.8%	¥783M ($5.0M)
2021-09-07	BUY	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co.,Ltd.	other	641.2K	¥2,226	+41.3%	¥1.4B ($9.2M)
2021-07-26	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	158.1K	¥2,803	+12.2%	¥14M ($90K)
2021-07-26	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	738.1K	¥2,803	+12.2%	¥420M ($2.7M)
2021-07-16	SELL	Market Buy	村口和孝 Kazutaka Muraguchi	passive	601.0K	¥2,866	-9.7%	¥433M ($2.8M)
2021-07-16	BUY	Market Buy	村口和孝 Kazutaka Muraguchi	passive	601.0K	¥2,866	+9.7%	¥433M ($2.8M)
2021-04-22	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	153.3K	¥2,649	+18.7%	¥36M ($233K)
2021-04-22	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	588.1K	¥2,649	+18.7%	¥1.6B ($10.1M)
2021-04-07	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	140.5K	¥2,820	+11.5%	¥178M ($1.1M)
2021-04-07	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	588.1K	¥2,820	+11.5%	¥1.7B ($10.7M)

Frequently asked questions

Who has been buying IPS, Inc. stock?: 5 distinct investors have filed 10 disclosed large-shareholding filings in IPS, Inc. (4390), most recently on 2026-01-16. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does IPS, Inc. have?: IPS, Inc. has 10 buy-side and 11 sell-side disclosures on record, covering ¥1.1B ($7.2M) in total reported value, spanning 2021-04-07 to 2026-01-16.
Where does StockDrifts get IPS, Inc. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for IPS, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.