ATEYY · Advantest Corp · Holdings
Market Cap
$140.48B
Shares
721.95M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 17
Total Value: $14,569,809
Total Shares: 70,027
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 17 13F filers · Δ vs Mar 31, 2026Top Holder
46.3%
−0.2 pts
Top 5
89.3%
−3.6 pts
Top 10
98.4%
−1.5 pts
HHI
2,907
Highly concentrated+33
Quarterly Activity
vs Mar 31, 2026
New
4
Increased
9
Decreased
2
Sold Out
0
Unchanged
2
Holder count:
+4
Institutional value:
+56.8%
Shares held:
+2.3%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega RHUMBLINE ADVISERS | +2,580 | 17,524 | |
| Mid Boston Common Asset Management, LLC | +639 | 32,439 | |
| Mid GAMMA Investing LLC | +258 | 5,684 | |
| Mid Diversified Trust Co | +205 | 3,095 | |
| Small First Command Advisory Services, Inc. | +146 | 167 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid YOUSIF CAPITAL MANAGEMENT, LLC | −5,330 | 2,267 | |
| Small Salomon & Ludwin, LLC | −85 | 445 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Small Calydon Capital | 1,433 | $298,149 | |
| Small Enterprise Financial Services Corp | 1,211 | $251,959 | |
| Small ATLAS CAPITAL ADVISORS INC. | 270 | $56,176 | |
| Micro Gleason Group, Inc. | 26 | $5,409 |
Top Sold-Out Positions
vs Mar 31, 2026No fully closed positions this quarter.