Teradyne, Inc. (TER) Ownership
TER ownership summary
as of October 18, 2026- Institutions
- 102.2% of shares outstanding
- Insiders
- 0.20% of shares outstanding
- Shares outstanding
- 156.3M
- Float
- 156.0M shares available to trade
- Short interest
- 6.38% 8.6M shares short
- Days to cover
- 3.53 short interest up 6.6% vs prior month
- Institutions 102.16%
- Insiders 0.20%
TER top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 12.43% | 19.4M | $6.32B | +3.1M (+19.2%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 6.54% | 10.2M | $3.32B | +49,207 (+0.5%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.52% | 8.6M | $2.81B | +30,864 (+0.4%) | June 30, 2026 |
| 4 | State Street Corp | 4.66% | 7.3M | $2.37B | +320,034 (+4.6%) | June 30, 2026 |
| 5 | Amvescap Plc. | 4.27% | 6.7M | $2.17B | +4.2M (+165.1%) | June 30, 2026 |
| 6 | JPMorgan Chase & Co | 3.56% | 5.6M | $1.81B | +2.7M (+94.0%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.94% | 4.6M | $1.50B | +233,612 (+5.3%) | June 30, 2026 |
| 8 | FMR Inc | 2.63% | 4.1M | $1.33B | +496,271 (+13.7%) | June 30, 2026 |
| 9 | Ameriprise Financial Inc | 1.74% | 2.7M | $883.8M | −124,548 (−4.4%) | June 30, 2026 |
| 10 | Van Eck Associates Corporation | 1.67% | 2.6M | $847.6M | +123,549 (+5.0%) | June 30, 2026 |
| 11 | AQR Capital Management LLC | 1.55% | 2.4M | $785.4M | +233,416 (+10.7%) | June 30, 2026 |
| 12 | NORGES BANK | 1.42% | 2.2M | $722.8M | +163,643 (+7.9%) | June 30, 2026 |
| 13 | Alkeon Capital Management, LLC | 1.38% | 2.2M | $703.0M | −626,500 (−22.5%) | June 30, 2026 |
| 14 | The Goldman Sachs Group Inc | 1.27% | 2.0M | $646.7M | +296,731 (+17.5%) | June 30, 2026 |
| 15 | UBS Asset Mgmt Americas Inc | 1.27% | 2.0M | $642.9M | +12,659 (+0.6%) | June 30, 2026 |
| 16 | Morgan Stanley - Brokerage Accounts | 1.22% | 1.9M | $622.3M | −257,427 (−11.9%) | June 30, 2026 |
| 17 | T. Rowe Price Investment Management,Inc. | 1.13% | 1.8M | $576.6M | +1.8M (0.0%) | June 30, 2026 |
| 18 | Bank of America Corp | 1.11% | 1.7M | $566.1M | +655,984 (+60.4%) | June 30, 2026 |
| 19 | UBS Group AG | 1.05% | 1.6M | $534.1M | +533,522 (+48.1%) | June 30, 2026 |
| 20 | T. Rowe Price Associates, Inc. | 0.98% | 1.5M | $497.3M | −588,590 (−27.8%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 14.9M shares and 4 cut 1.6M.
TER top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.18% | 5.0M | $1.62B | −10,541 (−0.2%) | August 31, 2026 |
| 2 | Vanguard 500 Index Investor | 2.63% | 4.1M | $1.33B | −54,152 (−1.3%) | September 30, 2026 |
| 3 | iShares Semiconductor ETF | 2.35% | 3.7M | $1.19B | −36,992 (−1.0%) | September 30, 2026 |
| 4 | Vanguard MStar Mid Cap Index Instl | 2.14% | 3.3M | $1.09B | −38,310 (−1.1%) | September 30, 2026 |
| 5 | Invesco QQQ Trust | 2.09% | 3.3M | $1.06B | −5,324 (−0.2%) | September 30, 2026 |
| 6 | VanEck Semiconductor ETF | 1.50% | 2.3M | $762.9M | +13,356 (+0.6%) | September 30, 2026 |
| 7 | iShares Core S&P 500 ETF | 1.33% | 2.1M | $677.1M | −3,367 (−0.2%) | September 30, 2026 |
| 8 | Fidelity 500 Index | 1.30% | 2.0M | $660.4M | +7,804 (+0.4%) | August 31, 2026 |
| 9 | State Street® SPDR® S&P 500® ETF | 1.23% | 1.9M | $625.6M | — | September 30, 2026 |
| 10 | Vanguard MStar Growth Index Investor | 1.21% | 1.9M | $616.3M | +120,991 (+6.8%) | September 30, 2026 |
| 11 | Direxion Daily Semicondct Bull 3X ETF | 0.82% | 1.3M | $415.8M | −7,728 (−0.6%) | September 30, 2026 |
| 12 | Vanguard MStar Mid Cap Growth ETF | 0.79% | 1.2M | $398.9M | +24,809 (+2.1%) | September 30, 2026 |
| 13 | Vanguard Information Technology ETF | 0.78% | 1.2M | $395.2M | +2,799 (+0.2%) | September 30, 2026 |
| 14 | State Street®TechSelSectSPDR®ETF | 0.72% | 1.1M | $366.6M | +696 (+0.1%) | September 30, 2026 |
| 15 | Columbia Seligman Tech & Info A | 0.72% | 1.1M | $364.0M | −21,950 (−1.9%) | August 31, 2026 |
| 16 | ACAP Strategic A | 0.61% | 958K | $311.4M | −295,407 (−23.6%) | June 30, 2026 |
| 17 | iShares Russell Mid-Cap Growth ETF | 0.56% | 881K | $286.4M | −942 (−0.1%) | September 30, 2026 |
| 18 | Vanguard Institutional Index I | 0.53% | 827K | $268.8M | −9,634 (−1.2%) | September 30, 2026 |
| 19 | T. Rowe Price Mid-Cap Growth | 0.49% | 760K | $247.1M | −63,040 (−7.7%) | September 30, 2026 |
| 20 | Fidelity Select Semiconductors | 0.46% | 724K | $235.2M | +659,900 (+1,032.7%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
TER insider transactions
latest 12| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-05 | Ro Khanna | Buy | $271.13 | — | — |
| 2026-02-04 | Michael T. McCaul | Buy | $269.07 | — | — |
| 2025-12-12 | Gregory Stephen Smith | Sell | $201.31 | 1,108 | $223,051 |
| 2025-11-12 | Gregory Stephen Smith | Sell | $180.20 | 1,108 | $199,662 |
| 2025-10-31 | Lisa C. McClain | Sell | $181.76 | — | — |
| 2025-10-30 | Lisa C. McClain | Buy | $176.88 | — | — |
| 2025-10-30 | Lisa C. McClain | Sell | $176.88 | — | — |
| 2025-10-10 | Gregory Stephen Smith | Sell | $145.24 | 1,108 | $160,926 |
| 2025-09-22 | Gregory Stephen Smith | Sell | $126.39 | 554 | $70,020 |
| 2025-09-12 | Gregory Stephen Smith | Sell | $115.00 | 554 | $63,710 |
| 2025-08-12 | Gregory Stephen Smith | Sell | $106.00 | 554 | $58,724 |
| 2025-07-30 | Gregory Stephen Smith | Sell | $105.73 | 554 | $58,574 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
TER shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns TER
Institutional investors own 102.2% of Teradyne's shares and insiders 0.20%. The largest holder is BlackRock Inc with 12.43% of the shares (19.4M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 4 reduced their stake in the latest filings. Short interest is 6.38% of the float, or 3.53 days of average trading volume. The share count fell 27.2% since 2014.
Related: TER analyst forecast, TER key metrics, TER dividend history. See the TER stock overview for the latest quote and news.
TER ownership FAQ
Who owns the most Teradyne stock?
The largest shareholders of Teradyne are BlackRock Inc (12.43%), Vanguard Capital Management, LLC (6.54%), Vanguard Portfolio Management, LLC (5.52%), State Street Corp (4.66%), Amvescap Plc. (4.27%).
What percentage of Teradyne is owned by institutions?
Institutions hold 102.2% of Teradyne's shares outstanding; insiders hold 0.20%.
Which funds own Teradyne?
The largest fund holders of Teradyne are Vanguard MStar Total Stk Mkt Idx Invest (3.18%), Vanguard 500 Index Investor (2.63%), iShares Semiconductor ETF (2.35%), Vanguard MStar Mid Cap Index Instl (2.14%), Invesco QQQ Trust (2.09%).
What is Teradyne's short interest?
8.6M shares of Teradyne were sold short, 6.38% of the float; at the average daily volume it would take 3.53 days to cover.
Are insiders buying or selling Teradyne?
Of the latest 12 reported insider transactions in Teradyne (since July 30, 2025), 3 were purchases and 9 were sales.
How many shares of Teradyne are outstanding?
Teradyne has 156.3M shares outstanding, of which 156.0M are in the public float.