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CSS Holdings,Ltd. 2304

Company
株式会社CSSホールディングスCSS Holdings,Ltd.
Investors
13
Buys
26
Total Value
¥1.3B ($8.2M)
Avg Return
+219.99%
Last Filing
2026-03-12

CSS Holdings,Ltd. (2304) has 26 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥1.3B ($8.2M) in reported transaction value. The earliest filing StockDrifts holds for CSS Holdings,Ltd. is dated 2021-07-06; the most recent is 2026-03-12. Across these filings the average return since disclosure is +219.99%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-03-12BUYMarket Buy
野口 優
strategic677.0K¥964-5.5%¥6M ($36K)
2026-03-12BUYMarket Buy
野口 緑
strategic613.3K¥964-5.5%¥9M ($56K)
2026-03-12BUYMarket Buy
野口 凛
strategic671.0K¥964-5.5%¥5M ($33K)
2023-05-19SELLMarket Buy
Oakキャピタル株式会社
Oak Capital Corporation
passive0¥698-30.5%¥419M ($2.7M)
2023-05-18BUYMarket Buy
株式会社ユニヴァ・アセット・マネジメント
UNIVA Asset Management Limited
passive600.0K¥710+28.3%¥426M ($2.7M)
2022-08-01BUYnegotiated
S・TEC株式会社
S TEC Co.,Ltd.
strategic451.4K¥284--
2022-08-01BUYnegotiated
白土 将敏
Masatoshi Shirato
strategic202.0K¥284+220.8%¥40M ($257K)
2022-08-01BUYnegotiated
B・TEC株式会社
B・TEC Co., Ltd.
strategic8.5K¥284--
2022-08-01BUYnegotiated
C-TEC株式会社
C-TEC Co., Ltd.
strategic8.1K¥284--
2022-08-01BUYnegotiated
D・TEC株式会社
D・TEC Co., Ltd.
strategic7.0K¥284--
2022-06-06SELLunknown
野口 緑
Noguchi Midori
strategic609.4K¥258-253.1%¥171M ($1.1M)
2022-06-06SELLunknown
野口 緑
Noguchi Midori
strategic609.4K¥258-253.1%¥171M ($1.1M)
2022-06-06BUYunknown
野口 優
Yu Noguchi
strategic677.0K¥258--
2022-06-06BUYunknown
野口 凛
Rin Noguchi
strategic671.0K¥258-¥173M ($1.1M)
2022-06-06BUYunknown
野口 優
Yu Noguchi
strategic677.0K¥258--
2022-06-06BUYunknown
野口 凛
Rin Noguchi
strategic671.0K¥258-¥173M ($1.1M)
2022-06-02BUYnegotiated
C-TEC株式会社
C-TEC Co., Ltd.
strategic8.1K¥259+251.7%¥2M ($13K)
2022-06-02BUYnegotiated
S・TEC株式会社
S TEC Co.,Ltd.
strategic451.4K¥259+251.7%¥411K ($3K)
2022-06-02BUYnegotiated
S・TEC株式会社
S TEC Co.,Ltd.
strategic451.4K¥259+251.7%¥411K ($3K)
2022-06-02BUYblock_purchase
S・TEC株式会社
S TEC Co.,Ltd.
strategic451.4K¥259+251.7%¥411K ($3K)
2022-06-02BUYblock_purchase
白土 将敏
Masatoshi Shirato
strategic62.0K¥259+251.7%¥13M ($83K)
2022-06-02SELLblock_purchase
B・TEC株式会社
B・TEC Co., Ltd.
strategic8.5K¥259-251.7%¥94M ($604K)
2022-06-02BUYblock_purchase
C-TEC株式会社
C-TEC Co., Ltd.
strategic8.1K¥259+251.7%¥2M ($13K)
2022-06-02BUYblock_purchase
D・TEC株式会社
D・TEC Co., Ltd.
strategic7.0K¥259+251.7%¥2M ($11K)
2022-06-02BUYnegotiated
白土 将敏
Masatoshi Shirato
strategic62.0K¥259+251.7%¥13M ($83K)
2022-06-02SELLnegotiated
B・TEC株式会社
B・TEC Co., Ltd.
strategic8.5K¥259-251.7%¥94M ($604K)
2022-06-02BUYnegotiated
C-TEC株式会社
C-TEC Co., Ltd.
strategic8.1K¥259+251.7%¥2M ($13K)
2022-06-02BUYnegotiated
D・TEC株式会社
D・TEC Co., Ltd.
strategic7.0K¥259+251.7%¥2M ($11K)
2022-06-02BUYnegotiated
白土 将敏
Masatoshi Shirato
strategic62.0K¥259+251.7%¥13M ($83K)
2022-06-02SELLnegotiated
B・TEC株式会社
B・TEC Co., Ltd.
strategic8.5K¥259-251.7%¥94M ($604K)
2022-06-02BUYnegotiated
D・TEC株式会社
D・TEC Co., Ltd.
strategic7.0K¥259+251.7%¥2M ($11K)
2022-01-14BUYunknown
野口 緑
Noguchi Midori
strategic1.3M¥263--
2022-01-14BUYunknown
野口 優
Yu Noguchi
strategic677.0K¥263--
2021-12-15SELLunknown
野口 緑
Noguchi Midori
strategic1.3M¥278-227.7%¥171M ($1.1M)
2021-12-15BUYunknown
野口 優
Yu Noguchi
strategic677.0K¥278+227.7%¥6M ($41K)
2021-12-07BUYMarket Buy
Oakキャピタル株式会社
Oak Capital Corporation
passive600.0K¥262+247.7%¥157M ($1.0M)
2021-09-22BUYunknown
野口 優
Yu Noguchi
strategic654.0K¥267-¥175M ($1.1M)
2021-09-22SELLunknown
野口 緑
Noguchi Midori
strategic2.0M¥267-241.2%¥173M ($1.1M)
2021-09-14BUYMarket Buy
三菱UFJ信託銀行株式会社
Mitsubishi UFJ Financial Group Inc.
passive1.3M¥276+230.1%¥24M ($156K)
2021-09-14BUYMarket Buy
auカブコム証券株式会社
Mitsubishi UFJ Financial Group Inc.
other5.7K¥276-¥2M ($10K)
2021-09-13BUYMarket Buy
S・TEC株式会社
S TEC Co.,Ltd.
strategic449.9K¥261+249.0%¥10M ($68K)
2021-09-13SELLMarket Buy
白土 将敏
Masatoshi Shirato
strategic12.0K¥261-249.0%¥38M ($247K)
2021-09-13BUYMarket Buy
B・TEC株式会社
B・TEC Co., Ltd.
strategic3.6K¥261-¥940K ($6K)
2021-08-26BUYnegotiated
S・TEC株式会社
S TEC Co.,Ltd.
strategic449.9K¥257+254.5%¥10M ($67K)
2021-08-26BUYnegotiated
S・TEC株式会社
S TEC Co.,Ltd.
strategic449.9K¥257+254.5%¥10M ($67K)
2021-08-26BUYMarket Buy
S・TEC株式会社
S TEC Co.,Ltd.
strategic451.4K¥257+254.5%¥11M ($69K)
2021-08-26BUYMarket Buy
C-TEC株式会社
C-TEC Co., Ltd.
unknown8.1K¥257+254.5%¥2M ($13K)
2021-08-26BUYMarket Buy
D・TEC株式会社
D・TEC Co., Ltd.
unknown7.5K¥257+254.5%¥2M ($12K)
2021-08-26SELLnegotiated
白土 将敏
Masatoshi Shirato
strategic12.0K¥257-254.5%¥38M ($243K)
2021-08-26BUYnegotiated
C-TEC株式会社
C-TEC Co., Ltd.
strategic2.5K¥257-¥643K ($4K)

Showing the 50 most recent of 55 filings.

Frequently asked questions

Who has been buying CSS Holdings,Ltd. stock?
13 distinct investors have filed 26 disclosed large-shareholding filings in CSS Holdings,Ltd. (2304), most recently on 2026-03-12. 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 CSS Holdings,Ltd. have?
CSS Holdings,Ltd. has 26 buy-side and 13 sell-side disclosures on record, covering ¥1.3B ($8.2M) in total reported value, spanning 2021-07-06 to 2026-03-12.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.