Teradyne
TER · NASDAQ
Who owns TER
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 40.5% of TER’s shares.
- BlackRock Institutional Trust Company, N.A.8.6%
- Vanguard Capital Management, LLC6.5%
- Vanguard Portfolio Management, LLC5.5%
- State Street Investment Management (US)4.7%
- Next 6 largest institutions15.2%
- All other shareholders59.5%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 13.46M | 8.60% |
| Vanguard Capital Management, LLC | 10.23M | 6.53% |
| Vanguard Portfolio Management, LLC | 8.63M | 5.52% |
| State Street Investment Management (US) | 7.29M | 4.66% |
| Invesco Capital Management LLC | 5.73M | 3.66% |
| Geode Capital Management, L.L.C. | 4.60M | 2.94% |
| JP Morgan Asset Management | 4.44M | 2.84% |
| Fidelity Management & Research Company LLC | 3.85M | 2.46% |
| Van Eck Associates Corporation | 2.61M | 1.67% |
| Columbia Threadneedle Investments (US) | 2.58M | 1.65% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 4.98M | 3.18% |
| Vanguard 500 Index Fund | 4.11M | 2.62% |
| iShares Semiconductor ETF | 3.64M | 2.33% |
| Vanguard Mid-Cap Index Fund | 3.39M | 2.16% |
| Invesco QQQ Trust | 3.37M | 2.15% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $12.51M (20 trades) of TER on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| JOHNSON MERCEDES | Sale | 167 | $67.28K |
| Herweck Peter | Other | 4 | — |
| MADDOCK ERNEST E | Other | 2 | — |
| TUFANO PAUL J | Other | 19 | — |
| Henry Andrew Chisholm | Award | 64 | — |
| Herweck Peter | Award | 77 | — |
| TUFANO PAUL J | Award | 141 | — |
| MATZ MARILYN | Sale | 400 | $140.44K |
| Smith Gregory Stephen | Sale | 4.00K | $1.35M |
| MATZ MARILYN | Sale | 800 | $270.26K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Michael McCaulHouse | Purchase | $15K–$50K | Apr 29, 2026 |
| Alan ArmstrongSenator | Purchase | $1K–$15K | Mar 27, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 8.63M
- Days to cover
- 3.67
- % of shares outstanding
- 5.51%
- Average daily volume
- 2.35M
- Change since last report
- +6.6%
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