Advantest (ATEYY): which funds own it
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Sections with a free account
No concentrated manager holds it.
Who owns Advantest?
Advantest trades in the U.S. through ADRs, certificates that represent shares of a non-U.S. company. Form 13F counts ADRs while the company reports ordinary shares, so we do not compute percentages. As of Jun 30, 2026, the largest ADR holders reported on Form 13F were Boston Common Asset Management (32,439 ADRs), Rhumbline Advisers (17,524 ADRs) and Ativo Capital Management (13,637 ADRs).
Which institutions hold the most Advantest shares?
Per Form 13F filings as of Jun 30, 2026, in ADRs:
- 1. Boston Common Asset Management: 32,439 ADRs
- 2. Rhumbline Advisers: 17,524 ADRs
- 3. Ativo Capital Management: 13,637 ADRs
- 4. GAMMA Investing: 5,684 ADRs
- 5. Canopy Partners: 3,766 ADRs
- 6. Diversified Trust: 3,095 ADRs
- 7. Yousif Capital Management: 2,267 ADRs
- 8. Calydon Capital: 1,433 ADRs
- 9. Enterprise Financial Services: 1,211 ADRs
- 10. Westside Investment Management: 800 ADRs
Sources:All of the company's proxy statements on EDGAR ↗
We hold 13D and 13G filings made since December 2024: a holder above 5% that has not filed since then does not appear here.
Quarter flow (concentrated managers)
Concentrated managers holding it
None in the latest quarter.
Largest holders of ATEYY (all 13F filers)
- Boston Common Asset Management32 KType not verified+639
- Rhumbline Advisers18 KIndex manager+2,580
- Ativo Capital Management14 KType not verified+1,711
- GAMMA Investing5,684Type not verified+258
- Canopy Partners3,766Type not verified+1
- Diversified Trust3,095Wealth adviser+205
- Yousif Capital Management2,267Type not verified−5,330
- Calydon Capital1,433Type not verified+1,433
- Enterprise Financial Services1,211Type not verified+1,211
- Westside Investment Management800Type not verified0
- Shares
- 32 K
- Change
- +639
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- Type
- Type not verified
- Value
- $6.7M
- Shares
- 18 K
- Change
- +2,580
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- Type
- Index manager
- Value
- $3.6M
- Ativo Capital Management
- Shares
- 14 K
- Change
- +1,711
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- Type
- Type not verified
- Value
- $2.8M
- Shares
- 5,684
- Change
- +258
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- Type
- Type not verified
- Value
- $1.2M
- Canopy Partners
- Shares
- 3,766
- Change
- +1
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- Type
- Type not verified
- Value
- $784K
- Shares
- 3,095
- Change
- +205
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- Type
- Wealth adviser
- Value
- $616K
- Shares
- 2,267
- Change
- −5,330
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- Type
- Type not verified
- Value
- $451K
- Calydon Capital
- Shares
- 1,433
- Change
- +1,433
See more
- Type
- Type not verified
- Value
- $298K
- Enterprise Financial Services
- Shares
- 1,211
- Change
- +1,211
See more
- Type
- Type not verified
- Value
- $252K
- Westside Investment Management
- Shares
- 800
- Change
- 0
See more
- Type
- Type not verified
- Value
- $166K
The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.
Insiders (Form 4)
Open-market purchases, excluding 10b5-1 plans. Officers and directors only; joint filers of the same purchase count as one. 10% owners with no role are shown separately. 0 = nobody bought; “no data” = we do not have its Form 4 filings.
Each of the company's Form 4 filings, on EDGAR ↗Latest trades, with date and filing →
Above 5% (13D/13G)
This list may be incomplete: we hold 13D and 13G filings made since December 2024. A holder above 5% that has not filed anything since then is not shown here.
No recent filings.
This company filed no 8-K forms in the last year. Foreign companies listed in the US (ADRs) report material events on forms 6-K and 20-F, and ETFs and funds do not file 8-Ks. If it is a foreign company listed in the US through ADRs (American Depositary Receipts), what trades are bank-issued certificates that represent shares from its home market. See its filings on EDGAR ↗