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$ATEYY
$217.58 +$7.60 (3.62%) Close

Ownership

13F as of Q2 2026 · 174.5M shares outstanding

Who owns ATEYY?

By type of holder
Institutions 0.1% Everyone else 99.9%

No insider has reported a holding in the last two years, so insiders are counted in "Everyone else".

Concentration Top 10 holders own 0.1%
Boston Common Asset Management, LLC 0.0% · Rhumbline Advisers 0.0%
Institutional ownership
0.1%
0.0 pts vs last qtr
Institutional holders
20
+2 vs last qtr
Net shares bought
+2.7K
by institutions in Q2 2026
New / sold out
4 / 2
positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026
  • Rhumbline Advisers +2.6K
  • Ativo Capital Management LLC +1.7K

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Biggest sellers in Q2 2026
  • Yousif Capital Management, LLC −5.3K
  • Accent Capital Management, LLC SOLD OUT −464

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Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Advantest Corp in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2010–FY2015
+7.7%
+1.50% a year
Each share's claim on the business
−7.2%
shrank without buying or selling a share
Spent on buybacks vs paid in stock
$10.3B vs $3.04B
over 6 fiscal years
Diluted shares, split-adjusted
168.1M181.3M194.5M2010: 178.7M shares'102011: 175.5M shares'112012: 173.3M shares'122013: 173.5M shares'132014: 174.1M shares'142015: 192.5M shares'15
Buybacks Stock-based comp
$0$5.13B$10.27B2010 buybacks: $4.0M2010 stock comp: $143.0M'102011 buybacks: $10.27B2011 stock comp: $165.0M'112012 buybacks: $1.0M2012 stock comp: $583.0M'122013 buybacks: $1.0M2013 stock comp: $861.0M'132014 buybacks: $02014 stock comp: $1.28B'142015 buybacks: $02015 stock comp: $0'15

How patient are the owners?

Institutional shares by how long they've been held
5+ years0% 3–5 years21% 1–3 years50% Under 1 year29%
Quarterly turnover
7.6%
of institutional shares changed hands
Top 10 managers, median time held
1 year

Super Investors

Investment managers reporting ATEYY on Form 13F
BC
Boston Common Asset Management, LLC
Shares
32.4K
% of company
0.02%
Change vs last qtr
+639 (+2.0%)
Held since
2025
RA
Rhumbline Advisers
Shares
17.5K
% of company
0.01%
Change vs last qtr
+2.6K (+17.3%)
Held since
2023

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Institutional Funds

Mutual funds and ETFs reporting ATEYY on Form N-PORT; together they hold 0.1% of the company
AI
ActivePassive International Equity ETF
Trust for Professional Managers
Position value
$4.53M
% of company
0.01%
% of the fund
0.39%
As of
August 31, 2026
ID
iShares Dynamic Equity Active ETF
BlackRock ETF Trust
Position value
$3.76M
% of company
0.01%
% of the fund
0.12%
As of
July 31, 2026

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