Who has been buying KDDI Corporation stock?

18 distinct investors have filed 19 disclosed large-shareholding filings in KDDI Corporation (9433), most recently on 2025-07-04. 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 KDDI Corporation have?

KDDI Corporation has 19 buy-side and 15 sell-side disclosures on record, covering ¥272.3B ($1.8B) in total reported value, spanning 2021-03-29 to 2025-07-04.

Where does StockDrifts get KDDI Corporation 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.

KDDI Corporation 9433

Company

KDDI株式会社KDDI Corporation

Investors

Buys

Total Value

¥272.3B ($1.8B)

Avg Return

+29.03%

Last Filing

2025-07-04

KDDI Corporation (9433) has 19 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 18 distinct investors. Together those filings cover ¥272.3B ($1.8B) in reported transaction value. The earliest filing StockDrifts holds for KDDI Corporation is dated 2021-03-29; the most recent is 2025-07-04. 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 +29.03%, 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
2026-07-08	SELL	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	309.7M	¥2,808	-6.2%	¥150.8B ($972.8M)
2026-07-02	SELL	unknown	京セラ株式会社 KYOCERA CORPORATION	strategic	508.5M	¥2,723.5	-7.3%	¥146.3B ($943.6M)
2026-06-15	BUY	block_purchase	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	363.4M	¥2,718	+3.2%	¥42.5B ($274.1M)
2026-06-11	BUY	Market Buy	京セラ株式会社 KYOCERA CORPORATION	strategic	562.1M	¥2,757.5	+1.7%	¥67.4B ($434.9M)
2025-07-04	SELL	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	363.4M	¥2,485	-5.7%	¥107.2B ($691.5M)
2025-07-04	SELL	unknown	京セラ株式会社 KYOCERA CORPORATION	strategic	562.1M	¥2,485	-5.7%	¥268.5B ($1.7B)
2025-06-16	BUY	block_purchase	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	406.6M	¥2,438	+7.7%	¥43.9B ($283.2M)
2025-06-13	BUY	Market Buy	京セラ株式会社 KYOCERA CORPORATION	strategic	670.2M	¥2,426	+8.3%	¥147.3B ($950.4M)
2025-05-07	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	36.1M	¥2,635	-0.3%	¥46.2B ($298.1M)
2025-05-07	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	7.9M	¥2,635	-0.3%	¥20.7B ($133.5M)
2025-05-07	BUY	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	4.4M	¥2,635	-0.3%	¥11.7B ($75.3M)
2025-05-07	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	72.0M	¥2,635	-0.3%	¥43.9B ($283.2M)
2025-05-07	BUY	Market Buy	ブラックロック・アセット・マネジメント・カナダ・リミテッド BlackRock Asset Management Canada Limited	passive	4.8M	¥2,635	-0.3%	¥12.7B ($82.2M)
2025-05-07	BUY	Market Buy	ブラックロック(ルクセンブルグ)エス・エーS.A.) BlackRock (Luxembourg	passive	4.5M	¥2,635	-0.3%	¥11.8B ($75.9M)
2025-05-07	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	13.4M	¥2,635	-0.3%	¥21.9B ($141.6M)
2025-05-07	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	4.9M	¥2,635	+0.3%	¥48.5B ($313.0M)
2025-05-07	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	43.4M	¥2,635	+0.3%	¥32.3B ($208.7M)
2025-05-07	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	73.8M	¥2,635	-0.3%	¥30.0B ($193.8M)
2024-09-05	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	53.4M	¥2,439.5	-7.7%	¥8.0B ($51.7M)
2024-09-05	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	48.4M	¥2,439.5	-7.7%	¥24.1B ($155.2M)
2024-07-04	SELL	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	203.3M	¥2,196.5	-19.6%	¥109.3B ($705.1M)
2024-06-12	BUY	block_purchase	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	253.1M	¥2,139	+22.8%	¥26.3B ($169.4M)
2023-09-25	SELL	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	253.1M	¥2,358	-11.4%	¥150.4B ($970.4M)
2023-08-31	BUY	block_purchase	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	316.8M	¥2,162.5	+21.5%	¥498M ($3.2M)
2023-03-29	BUY	unknown	京セラ株式会社 KYOCERA CORPORATION	strategic	335.1M	¥2,083.5	+26.1%	¥100.8B ($650.0M)
2023-03-29	SELL	unknown	京セラ株式会社 KYOCERA CORPORATION	strategic	335.1M	¥2,083.5	-26.1%	¥713.1B ($4.6B)
2023-03-29	BUY	Market Buy	京セラ株式会社 KYOCERA CORPORATION	strategic	335.1M	¥2,083.5	+26.1%	¥100.8B ($650.0M)
2021-12-20	BUY	negotiated	MUFGセキュリティーズ(カナダ) MUFG Securities(Canada	other	2.6M	¥1,475.474	+83.7%	¥3.8B ($24.7M)
2021-12-20	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	58.6M	¥1,681.5	-56.2%	¥8.9B ($57.5M)
2021-12-20	BUY	negotiated	MUFGセキュリティーズ(カナダ) MUFG Securities(Canada	other	2.6M	¥1,681.5	+56.2%	¥4.4B ($28.2M)
2021-12-20	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	4.6M	¥1,681.5	-56.2%	¥34.5B ($222.5M)
2021-12-20	SELL	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	27.9M	¥1,681.5	-56.2%	¥1.5B ($10.0M)
2021-12-20	BUY	negotiated	MUFGセキュリティーズ(カナダ) MUFG Securities(Canada	other	2.6M	¥1,475.474	+83.7%	¥3.8B ($24.7M)
2021-12-20	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	4.3M	¥1,681.5	+56.2%	¥7.2B ($46.1M)
2021-12-20	BUY	negotiated	MUFGセキュリティーズ(カナダ) MUFG Securities(Canada	other	2.6M	¥1,681.5	+56.2%	¥4.4B ($28.2M)
2021-10-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	59.7M	¥1,863	-41.0%	¥2.1B ($13.8M)
2021-10-21	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	61.3M	¥1,863	-41.0%	¥31.3B ($202.2M)
2021-10-04	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	25.0M	¥1,821.5	+44.2%	¥45.6B ($294.0M)
2021-10-04	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	28.8M	¥1,821.5	+44.2%	¥52.4B ($338.1M)
2021-10-04	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	63.8M	¥1,821.5	+44.2%	¥116.1B ($749.3M)
2021-10-04	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	4.3M	¥1,821.5	+44.2%	¥7.7B ($50.0M)
2021-07-05	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	536.8K	¥1,710	+53.6%	¥38.6B ($249.1M)
2021-07-05	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	29.4M	¥1,710	+53.6%	¥788M ($5.1M)
2021-07-05	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	65.6M	¥1,710	-53.6%	¥3.5B ($22.9M)
2021-07-05	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	4.3M	¥1,710	+53.6%	¥7.3B ($46.9M)
2021-03-29	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	23.6M	¥1,803	+45.7%	¥42.6B ($274.5M)
2021-03-29	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	28.9M	¥1,803	+45.7%	¥52.1B ($336.2M)
2021-03-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	67.7M	¥1,803	+45.7%	¥122.1B ($787.6M)
2021-03-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	4.3M	¥1,803	+45.7%	¥7.7B ($49.5M)

Frequently asked questions

Who has been buying KDDI Corporation stock?: 18 distinct investors have filed 19 disclosed large-shareholding filings in KDDI Corporation (9433), most recently on 2025-07-04. 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 KDDI Corporation have?: KDDI Corporation has 19 buy-side and 15 sell-side disclosures on record, covering ¥272.3B ($1.8B) in total reported value, spanning 2021-03-29 to 2025-07-04.
Where does StockDrifts get KDDI Corporation 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 KDDI Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.