Comparable stake leader
Boston Common Asset Management, LLC
SEC ownership of ADVANTEST CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001158838.
Disclosed value leader
Boston Common Asset Management, LLC
Comparable rows
0/12
Latest evidence
30 Sep 2026
- Public ticker
- ATEYY, ADTTF on OTC
- Parsed ownership sources
-
13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Boston Common Asset Management, LLC
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
30 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001158838
- Issuer location
- Chiyoda Ku, Tokyo 100 0005, Japan
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ADVANTEST CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Boston Common Asset Manag...
Disclosed value leader
Boston Common Asset Manag...
Comparable rows
0/12
Latest evidence
30 Sep 2026
13F
Highest disclosed value: $7,429,289
12 rows are not safely comparable across share classes.
Showing 1-8 of 12 holder rows.
Quick read
Boston Common Asset Management, LLC has the largest disclosed position value at $7.43M.
0 of 12 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Boston Common Asset Management, LLC's linked filing trail.
Disclosed position value
Top 5
Boston Common Asset Management, LLC
$7.43M
Ativo Capital Management LLC
$3.25M
GAMMA Investing LLC
$1.38M
Canopy Partners, LLC
$813.6K
YOUSIF CAPITAL MANAGEMENT, LLC
$413.4K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 12 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Boston Common Asset Management, LLC |
13F
Company
|
—
denominator unverified
|
$7,429,289
33,638 shares
|
— | 30 Sep 2026 |
| Ativo Capital Management LLC |
13F
Company
|
—
denominator unverified
|
$3,249,168
14,711 shares
|
— | 30 Sep 2026 |
| GAMMA Investing LLC |
13F
Company
|
—
denominator unverified
|
$1,378,829
6,243 shares
|
— | 30 Sep 2026 |
| Canopy Partners, LLC |
13F
Company
|
—
denominator unverified
|
$813,648
3,684 shares
|
— | 30 Sep 2026 |
| YOUSIF CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
denominator unverified
|
$413,383
1,896 shares
|
— | 30 Sep 2026 |
| ENTERPRISE FINANCIAL SERVICES CORP |
13F
Company
|
—
denominator unverified
|
$282,479
1,279 shares
|
— | 30 Sep 2026 |
| ATLAS CAPITAL ADVISORS INC. |
13F
Company
|
—
denominator unverified
|
$9,079
270 shares
|
— | 30 Sep 2026 |
| Gleason Group, Inc. |
13F
Company
|
—
denominator unverified
|
$5,669
26 shares
|
— | 30 Sep 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
No eligible buy or sell activity is available for this window. No eligible Buy or Sell transactions are available in this dataset since 15 Nov 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Recent insider transactions for ADVANTEST CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.