ATEYY · Insider trading · 13F holders · Congress trades
Advantest Corp (ATEYY) (ATEYY)
Who is buying and selling ATEYY: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 1
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 1
ATEYY at a glance
- No open-market insider purchases or sales of ATEYY were filed in the last 90 days.
- 1 13F filer hold ATEYY among their 50 largest positions, worth $3.2M combined. The biggest bets by portfolio weight are Ativo Capital Management LLC (2.5%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- Members of Congress have disclosed 2 ATEYY trades since 2023, 1 purchase and 0 sales in the past year; the latest was Alan Armstrong (R-OK), buying $15K–50K on Mar 30, 2026.
- ATEYY last closed at $218.46 on Oct 30, 2026.
ATEYY insider trading
No open-market insider purchases or sales of ATEYY were filed in the last 90 days.
Who owns ATEYY? Hedge funds and superinvestors
1 13F filer hold ATEYY among their 50 largest positions, worth $3.2M combined. The biggest bets by portfolio weight are Ativo Capital Management LLC (2.5%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Ativo Capital Management LLCInstitutional asset manager | 2.5% | $3.2M | 14,711 | +7.9% shares | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 1). Screen ATEYY in the grand portfolio →
ATEYY stock trades by members of Congress
Members of Congress have disclosed 2 ATEYY trades since 2023, 1 purchase and 0 sales in the past year; the latest was Alan Armstrong (R-OK), buying $15K–50K on Mar 30, 2026.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Jul 21, 2026 | Alan ArmstrongR-OK · Senate | Buy | $15K–50K | Mar 30, 2026 | +72.2% |
| Aug 13, 2023 | Daniel S. GoldmanD-NY · House | Sale | $15K–50K | Jul 10, 2023 | +518.7% |
2 members have traded ATEYY: Alan Armstrong, Daniel S. Goldman.
ATEYY questions and answers
Are insiders buying ATEYY stock?
No open-market insider purchases or sales of ATEYY were filed in the last 90 days.
Which hedge funds own ATEYY?
1 13F filer hold ATEYY among their 50 largest positions, worth $3.2M combined. The biggest bets by portfolio weight are Ativo Capital Management LLC (2.5%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded ATEYY?
Members of Congress have disclosed 2 ATEYY trades since 2023, 1 purchase and 0 sales in the past year; the latest was Alan Armstrong (R-OK), buying $15K–50K on Mar 30, 2026.
Who is the largest holder of ATEYY?
Among 13F filers, Ativo Capital Management LLC reports the largest ATEYY position, $3.2M (14,711 shares) in its Q3 2026 13F. The biggest bet by portfolio weight is Ativo Capital Management LLC's: 2.5% of its portfolio.
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