ATEYY Institutional Ownership & Shareholders
ADVANTEST CORP- SPON ADR (ATEYY) is currently held by 18 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $18.57M based on the latest available SEC Form 13F filings for the quarter ended September 30, 2026.
Boston Common Asset Management, Llc is currently the largest disclosed institutional shareholder of ATEYY tracked by InsiderSet, reporting ownership valued at approximately $7.43M in its September 30, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 99% of the total disclosed ATEYY value among the investors covered in this analysis. Major shareholders include Boston Common Asset Management, Llc, Rhumbline Advisers, Ativo Capital Management Llc, and several other long-term asset managers with concentrated positions in ADVANTEST CORP- SPON ADR (ATEYY).
This page ranks the largest institutional ATEYY shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
18
Total Reported Value
$18.57M
Largest Holder
Boston Common Asset Management, Llc
Largest Position
$7.43M
Insider Transactions (90d)
0
Latest Filing Quarter
Q3 2026
New Institutional Positions
23
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Boston Common Asset Management, Llc | 0.43% | 33,638 | $7,429,289 | — | — | — | |
| Rhumbline Advisers | 0.00% | 17,524 | $3,646,020 | — | — | — | |
| Ativo Capital Management Llc | 2.51% | 14,711 | $3,249,168 | — | — | — | |
| Gamma Investing Llc | 0.05% | 6,243 | $1,378,829 | — | — | — | |
| Canopy Partners, Llc | 0.24% | 3,684 | $813,648 | — | — | — | |
| Diversified Trust Co | 0.01% | 3,095 | $615,858 | — | — | — | |
| Yousif Capital Management, Llc | 0.00% | 1,896 | $413,383 | — | — | — | |
| Calydon Capital | 0.04% | 1,433 | $298,150 | — | — | — | |
| Enterprise Financial Services Corp | 0.10% | 1,211 | $251,959 | — | — | — | |
| Westside Investment Management, Inc. | 0.03% | 800 | $204,152 | — | — | — | |
| Pnc Financial Services Group, Inc. | 0.00% | 704 | $146,474 | — | — | — | |
| Atlas Capital Advisors Inc. | 0.00% | 270 | $42,361 | — | — | — | |
| First Command Advisory Services, Inc. | 0.00% | 167 | $34,746 | — | — | — | |
| Ima Advisory Services, Inc. | 0.00% | 127 | $26,424 | — | — | — | |
| Huntington National Bank | 0.00% | 56 | $11,651 | — | — | — | |
| Gleason Group, Inc. | 0.00% | 26 | $5,669 | — | — | — | |
| Horrell Capital Management, Inc. | 0.00% | 13 | $2,871 | — | — | — | |
| Copeland Capital Management, Llc | 0.00% | 10 | $2,180 | — | — | — |
Frequently asked questions about ATEYY
Who are the largest institutional holders of ATEYY?
The largest institutional holders of ATEYY reported in the latest SEC Form 13F filings include Boston Common Asset Management, Llc, Rhumbline Advisers, Ativo Capital Management Llc, Gamma Investing Llc, and Canopy Partners, Llc. InsiderSet ranks institutional holders by their latest reported ATEYY position.
What is ATEYY institutional ownership?
This page tracks ATEYY positions reported by institutional investment managers through SEC Form 13F. ADVANTEST CORP- SPON ADR (ATEYY) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATEYY?
InsiderSet currently tracks 18 institutional managers reporting ATEYY holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATEYY shareholders.
How much ATEYY stock do institutions own?
Institutional investment managers disclosed approximately $18.57M in ATEYY holdings for Q3 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATEYY institutional ownership last updated?
The latest ATEYY institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended September 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATEYY holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATEYY position after the reporting date.
Are institutions buying or selling ATEYY?
Institutional buying and selling can be analyzed by comparing ATEYY positions across consecutive 13F reporting periods. InsiderSet's ATEYY Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATEYY ownership changes.
How has ATEYY institutional ownership changed over time?
InsiderSet tracks ATEYY institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.