Advantest ATEYY Institutional Ownership

Updated Oct 5, 2026

Advantest Corp (OTC:ATEYY) was reported as a holding by 16 institutional investors in 13F filings for the quarter ended June 30, 2026.

• Collectively, these holders controlled 0.04% of Advantest's outstanding shares in Q2 2026, unchanged from 0.04% in Q1 2026.
• Total shares held in Advantest rose 1.95% from Q1 2026, while the number of holders rose 14.29% from Q2 2025.
• Among the 16 holders of Advantest, 12 added to their positions, 2 reduced their stakes and 2 left their positions unchanged.
• Altogether, institutional holders owned 69.76K ATEYY shares at the end of Q2 2026, up 1.33K from the prior quarter and down 42.22K from a year earlier.
• Boston Common Asset Management, LLC held the largest position in ATEYY at 32.44K shares as of June 30, 2026, or 0.02% of shares outstanding.
• The largest position increases in ATEYY for Q2 2026 were by Rhumbline Advisers (+2.58K shares), Boston Common Asset Management, LLC (+639 shares), GAMMA Investing LLC (+258 shares), Diversified Trust Co (+205 shares) and First Command Advisory Services, Inc. (+146 shares).
• The largest position reductions in ATEYY for Q2 2026 were by Yousif Capital Management, LLC (-5.33K shares) and Salomon & Ludwin, LLC (-85 shares).
• Per Business Quant, the top 10 investors in ATEYY for the quarter ended June 30, 2026 were Boston Common Asset Management, LLC (32.44K shares), Rhumbline Advisers (17.52K shares), GAMMA Investing LLC (5.68K shares), Canopy Partners, LLC (3.77K shares), Diversified Trust Co (3.1K shares), Yousif Capital Management, LLC (2.27K shares), Calydon Capital (1.43K shares), Enterprise Financial Services Corp (1.21K shares), Westside Investment Management, Inc. (800 shares) and Pnc Financial Services Group, Inc. (704 shares).