Advantest Corporation

ATEYY • OTC

Advantest Corporation is a publicly traded company on OTC. As of Q3 2025, 11 institutional investors hold shares in this company, with total holdings valued at $9.8M. Boston Common Asset Management, LLC is the largest holder with a position valued at $5.1M.

Overview

Overview of institutional ownership in ATEYY as of Q3 2025

All Institutions

Institutions: 11
Value Held: $9.8M
Shares Held: 98.1K
Avg Position: $889.3K
Median Position: $396.8K

Hedge Funds

Hedge Funds: 0
Value Held: -
Shares Held: -
Avg Position: -
Median Position: -

Biggest Investors

Institutions with the largest positions in ATEYY as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
Boston Common Asset Management, LLC Long Only Manager	Kristina Ingrid Eisnor CCO	$5.1M 0.30% of portfolio	0.00% 51.5K shares	Q2 2025 Held for 5 months	$1.7B
Madison Asset Management, LLC Long Only Manager	Steven Allan Carl Chairman	$1.5M 0.02% of portfolio	0.00% 14.9K shares	Q2 2025 Held for 5 months	$9.0B
RHUMBLINE ADVISERS Long Only Manager	Denise Andrea D'Entremont CEO	$1.1M 0.00% of portfolio	0.00% 10.5K shares	Q2 2023 Held for 2y 5m	$124.42B
YOUSIF CAPITAL MANAGEMENT, LLC Long Only Manager	Kevin Khairi Yousif President	$761.0K 0.01% of portfolio	0.00% 7.7K shares	Q1 2023 Held for 2y 8m	$9.2B
GAMMA Investing LLC Long Only Manager	Lorraine Y Fang CEO	$471.9K 0.03% of portfolio	0.00% 4.7K shares	Q4 2023 Held for 1y 11m	$1.8B
C Canopy Partners, LLC Family Office	Charles Edward Stutenroth Managing Partner	$396.8K 0.14% of portfolio	0.00% 3.9K shares	Q4 2024 Held for 11 months	$286.3M
Diversified Trust Co RIA/Wealth	Nathan Michael Dingler Managing Partner	$264.3K 0.01% of portfolio	0.00% 2.7K shares	Q3 2025 Held for 2 months	$4.0B
Westside Investment Management, Inc. RIA/Wealth	James Michael Frawley CCO	$179.1K 0.03% of portfolio	0.00% 1.8K shares	Q3 2025 Held for 2 months	$587.2M
S Salomon & Ludwin, LLC Institution	-	$25.9K 0.00% of portfolio	0.00% 243.0 shares	Q2 2025 Held for 5 months	$1.1B
PNC FINANCIAL SERVICES GROUP, INC. Institution	William S. Demchak CEO	$13.1K 0.00% of portfolio	0.00% 130.0 shares	Q4 2022 Held for 2y 11m	$164.83B

Net Capital Flow

Institutional buying and selling activity for ATEYY in Q3 2025

Traded: −$1.1M
Buyers: 6
Sellers: 7
Total Bought: +$764.0K
Total Sold: −$1.9M
Avg Position: $698.7K

Biggest Buyers

Institution	Net Bought	Current Position
Diversified Trust Co RIA/Wealth	+$264.3K +2.7K shares	$264.3K 2.7K shares
Boston Common Asset Management, LLC Long Only Manager	+$247.6K +2.5K shares	$5.1M 51.5K shares
Westside Investment Management, Inc. RIA/Wealth	+$179.1K +876.0 shares	$179.1K 1.8K shares
GAMMA Investing LLC Long Only Manager	+$41.6K +414.0 shares	$471.9K 4.7K shares
S Salomon & Ludwin, LLC Institution	+$25.0K +234.0 shares	$25.9K 243.0 shares
C Canopy Partners, LLC Family Office	+$6.4K +64.0 shares	$396.8K 3.9K shares

Biggest Sellers

Institution	Net Sold	Current Position
Madison Asset Management, LLC Long Only Manager	−$874.5K −8.7K shares	$1.5M 14.9K shares
YOUSIF CAPITAL MANAGEMENT, LLC Long Only Manager	−$461.3K −4.7K shares	$761.0K 7.7K shares
Comprehensive Financial Planning, Inc./PA RIA/Wealth	−$276.5K −3.7K shares	Sold Off 0 shares
G Green Square Asset Management, LLC Institution	−$223.1K −3.0K shares	Sold Off 0 shares
RHUMBLINE ADVISERS Long Only Manager	−$37.5K −373.0 shares	$1.1M 10.5K shares
S Skopos Labs, Inc. RIA/Wealth	−$8.4K −113.0 shares	Sold Off 0 shares
PNC FINANCIAL SERVICES GROUP, INC. Institution	−$201.0 −2.0 shares	$13.1K 130.0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited ATEYY in Q3 2025

New Positions: 1
New Value: $179.1K
Exited Positions: 3
Exited Value: $507.9K

New Positions

Institution	Position Value
Westside Investment Management, Inc. RIA/Wealth	$179.1K 1.8K shares

Exited Positions

Institution	Previous Position
Comprehensive Financial Planning, Inc./PA RIA/Wealth	$276.5K 3.7K shares
G Green Square Asset Management, LLC Institution	$223.1K 3.0K shares
S Skopos Labs, Inc. RIA/Wealth	$8.4K 113.0 shares

Options Activity

Institutions with the largest Call and Put options positions in ATEYY as of Q3 2025

Call Positions: 0
Call Value: -
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
No call positions found

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with ATEYY as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
Boston Common Asset Management, LLC Long Only Manager	Kristina Ingrid Eisnor CCO	0.30% $5.1M	0.00% 51.5K shares	Q2 2025 Held for 5 months	$1.7B
C Canopy Partners, LLC Family Office	Charles Edward Stutenroth Managing Partner	0.14% $396.8K	0.00% 3.9K shares	Q4 2024 Held for 11 months	$286.3M
Westside Investment Management, Inc. RIA/Wealth	James Michael Frawley CCO	0.03% $179.1K	0.00% 1.8K shares	Q3 2025 Held for 2 months	$587.2M
GAMMA Investing LLC Long Only Manager	Lorraine Y Fang CEO	0.03% $471.9K	0.00% 4.7K shares	Q4 2023 Held for 1y 11m	$1.8B
Madison Asset Management, LLC Long Only Manager	Steven Allan Carl Chairman	0.02% $1.5M	0.00% 14.9K shares	Q2 2025 Held for 5 months	$9.0B
YOUSIF CAPITAL MANAGEMENT, LLC Long Only Manager	Kevin Khairi Yousif President	0.01% $761.0K	0.00% 7.7K shares	Q1 2023 Held for 2y 8m	$9.2B
Diversified Trust Co RIA/Wealth	Nathan Michael Dingler Managing Partner	0.01% $264.3K	0.00% 2.7K shares	Q3 2025 Held for 2 months	$4.0B
S Salomon & Ludwin, LLC Institution	-	0.00% $25.9K	0.00% 243.0 shares	Q2 2025 Held for 5 months	$1.1B
RHUMBLINE ADVISERS Long Only Manager	Denise Andrea D'Entremont CEO	0.00% $1.1M	0.00% 10.5K shares	Q2 2023 Held for 2y 5m	$124.42B
PNC FINANCIAL SERVICES GROUP, INC. Institution	William S. Demchak CEO	0.00% $13.1K	0.00% 130.0 shares	Q4 2022 Held for 2y 11m	$164.83B