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ADTTF

Advantest Corp SEC filings

Semiconductors & Related Devices · OTC, OTC · Incorporated in Japan

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Filing history

2026-08-11

EFFECT EFFECT

2026-08-06

F-6 F-6

2026-05-27

Passive 5%+ stake update SCHEDULE 13G/A

2025-08-28

D/A D/A

Item 06b

2024-09-03

D/A D/A

Item 06b

2023-06-06

D/A D/A

Item 06b

2022-06-09

D D

Item 06b

2020-08-06

SC 13G SC 13G

2016-04-22

15F-12B 15F-12B

2016-04-22

S-8 POS S-8 POS

2016-04-22

S-8 POS S-8 POS

2016-04-22

S-8 POS S-8 POS

2016-04-22

S-8 POS S-8 POS

2016-04-22

S-8 POS S-8 POS

2016-04-22

S-8 POS S-8 POS

2016-04-22

F-6 POS F-6 POS

2016-04-11

25 25

2016-04-01

Foreign company report 6-K

2016-02-12

SC 13G/A SC 13G/A

2016-02-12

Foreign company report 6-K

2016-02-10

SC 13G/A SC 13G/A

2016-02-04

SC 13G/A SC 13G/A

2016-01-27

Foreign company report 6-K

2015-12-22

Foreign company report 6-K

2015-11-13

Foreign company report 6-K

2015-10-26

Foreign company report 6-K

2015-09-09

UPLOAD UPLOAD

2015-09-08

CORRESP CORRESP

2015-08-31

UPLOAD UPLOAD

2015-08-14

Foreign company report 6-K

2015-07-28

Foreign company report 6-K

2015-06-25

Foreign company report 6-K

2015-06-25

Foreign annual report 20-F

2015-06-01

Foreign company report 6-K

2015-06-01

Conflict minerals report SD

2015-05-27

Foreign company report 6-K

2015-04-27

Foreign company report 6-K

2015-03-25

Foreign company report 6-K

2015-02-13

Foreign company report 6-K

2015-02-13

SC 13G SC 13G