Advantest Co., Ltd.
Advantest Co., Ltd. is a registered legal entity registered in Japan under 9011601000379, and its current status with National Tax Agency — Corporate Number Publication Site is active. The company was incorporated on 5 October 2015 and lists its registered address as Chiyoda Ward, Japan. 4 shareholders are on record for Advantest Co., Ltd., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from National Tax Agency — Corporate Number Publication Site and was last updated on 30 September 2026.
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Shareholders
4
Shareholders of Advantest Co., Ltd.
Four shareholders are currently on record for Advantest Co., Ltd., reflecting the kabunushi meibo (shareholder register) maintained under Articles 121-122 of the Companies Act rather than a public filing. The largest of these is VANGUARD STAR FUNDS-Vanguard Total International Stock Index Fund, holding 21.8% — the largest recorded stake — followed by VANGUARD WORLD FUND-Vanguard International Growth Fund at 20.3%; the remaining 2 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Data-provider feed — rows as supplied to Zavia for National Tax Agency — Corporate Number Publication Site, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| VANGUARD STAR FUNDS-Vanguard Total International Stock Index Fund | 21.8% | National Tax Agency — Corporate Number Publication Site | |
| VANGUARD WORLD FUND-Vanguard International Growth Fund | 20.3% | National Tax Agency — Corporate Number Publication Site | |
| Fidelity Investment Trust-Fidelity Series International Growth Fund | 4.6% | National Tax Agency — Corporate Number Publication Site | |
| Stanley-Laman Group, Ltd. | 0% | National Tax Agency — Corporate Number Publication Site |
Officers
5
Directors and officers of Advantest Co., Ltd.
The Group Ceo, Senior Executive Officer & Representative Director of Advantest Co., Ltd. currently on record is Douglas Lefever; five officers are currently on record for Advantest Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at Advantest Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control. The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Data availability
The register reports 13 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Data-provider feed — rows as supplied to Zavia for National Tax Agency — Corporate Number Publication Site, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
Group Structure
Group structure of Advantest Co., Ltd.
Advantest Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 10 subsidiaries recorded beneath it across 5 jurisdictions. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
- ADVANTEST PRE-OWNED SOLUTIONS CO., LTD. (Japan)
- Advantest Taiwan Inc. (Taiwan)
- ADVANTEST GREEN CORPORATION (Japan)
- Advantest America, Inc. (United States)
- ADVANTEST ACADEMY, K.K. (Japan)
- ADVANTEST KYUSHU SYSTEMS CO., LTD. (Japan)
- Advantest America Corporation (holding Co.) (United States)
- ADVANTEST (SINGAPORE) PTE. LTD. (Singapore)
- ADVANFACILITIES CO., LTD. (Japan)
- Advantest Europe GmbH (Germany)
Data availability
Those 10 subsidiaries span Japan, Taiwan, United States, Singapore, Germany jurisdictions, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. Three of the 10 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
Data-provider feed — rows as supplied to Zavia for National Tax Agency — Corporate Number Publication Site, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
Advantest Co., Ltd.
Japan
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Frequently Asked Questions
Who owns Advantest Co., Ltd.?
Four shareholders are currently on record for Advantest Co., Ltd., reflecting the kabunushi meibo (shareholder register) maintained under Articles 121-122 of the Companies Act rather than a public filing. The largest of these is VANGUARD STAR FUNDS-Vanguard Total International Stock Index Fund, holding 21.8% — the largest recorded stake — followed by VANGUARD WORLD FUND-Vanguard International Growth Fund at 20.3%; the remaining 2 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is Advantest Co., Ltd.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Advantest Co., Ltd. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does Advantest Co., Ltd. have on record?
4 shareholders are shown on record for Advantest Co., Ltd..
What is Advantest Co., Ltd.'s company registration number?
Advantest Co., Ltd.'s registration number is 9011601000379, filed with National Tax Agency — Corporate Number Publication Site in Japan. Its current status on the register is active.
Is Advantest Co., Ltd. still an active company?
Advantest Co., Ltd.'s status on National Tax Agency — Corporate Number Publication Site is listed as active.
When was Advantest Co., Ltd. incorporated?
Advantest Co., Ltd. was incorporated on 5 October 2015, according to National Tax Agency — Corporate Number Publication Site.
What is Advantest Co., Ltd.'s registered address?
The registered address on file for Advantest Co., Ltd. is Chiyoda Ward, Japan.
Who are the officers/directors of Advantest Co., Ltd.?
The Group Ceo, Senior Executive Officer & Representative Director of Advantest Co., Ltd. currently on record is Douglas Lefever; five officers are currently on record for Advantest Co., Ltd., filed with National Tax Agency — Corporate Number Publication Site. Management authority at Advantest Co., Ltd. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Advantest Co., Ltd. have a parent company or subsidiaries?
Advantest Co., Ltd. has no recorded parent company — it sits at the top of its own group structure, with 10 subsidiaries recorded beneath it across 5 jurisdictions. Those 10 subsidiaries span Japan, Taiwan, United States, Singapore, Germany jurisdictions, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. Three of the 10 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
Can Zavia monitor changes to Advantest Co., Ltd.'s ownership over time?
This profile reflects a point-in-time snapshot from National Tax Agency — Corporate Number Publication Site. Zavia's monitoring API can track changes to Advantest Co., Ltd.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access Advantest Co., Ltd.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including Japan, so records like Advantest Co., Ltd.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from National Tax Agency — Corporate Number Publication Site and was last synced on 30 September 2026.