Comparable stake leader
BlackRock, Inc.
SEC ownership of TERADYNE, INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000097210.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
15 Jul 2026
- Public ticker
- TER on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
15 Jul 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000097210
- Issuer location
- North Reading, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of TERADYNE, INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
15 Jul 2026
13D/G
13F
3/4/5
Lead comparable stake: 11%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 11%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
11%
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.5%
FMR LLC
4.9%
Gregory Stephen Smith
0.07%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
11%
|
$8,444,169,700
17,452,401 shares
|
+$775,042,975 | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.5%
|
$3,478,359,844
11,732,982 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.5%
|
$2,556,382,288
8,623,026 shares
|
$0 | 31 Mar 2026 |
| FMR LLC |
13F
13D/G
Company
|
4.9%
from 13D/G
|
$1,070,073,824
3,609,505 shares
|
— | 31 Mar 2026 |
| Gregory Stephen Smith |
3/4/5
President and CEO, Director
|
0.07%
|
$41,508,478
116,495 shares
|
-$6,807,664 | 15 Jul 2026 |
| Paul J. Tufano |
3/4/5
Director
|
0.04%
|
$19,521,298
65,848 shares
|
— | 25 Jun 2026 |
| Marilyn Matz |
3/4/5
Director
|
0.01%
|
$5,786,714
16,241 shares
|
-$1,346,392 | 15 Jul 2026 |
| Peter Herweck |
3/4/5
Director
|
0.01%
|
$4,802,948
16,201 shares
|
— | 25 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$10,622,257.
Buys
$0
Insiders: 0
Sells
$10,622,257
Insiders: 6
Net
-$10,622,257
Shares: -34,542
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 34,542
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 22,875 | $0 | $8,354,311 | -$8,354,311 |
| 3-6 | 0 | 2,931 | $0 | $890,066 | -$890,066 |
| 6-9 | 0 | 4,091 | $0 | $790,776 | -$790,776 |
| 9-12 | 0 | 4,645 | $0 | $587,105 | -$587,105 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 27 reporting-owner rows connected to TERADYNE, INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
27
Largest Forms 3/4/5 holder
Gregory Stephen Smith
Net 12M change
-$10,622,257
Latest report
15 Jul 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Gregory Stephen Smith | President and CEO, Director | $41,508,478 | -$6,807,664 | -14% | Filing P/S | 15 Jul 2026 |
| Mark E. Jagiela | CEO, Director | $21,731,948 | Mixed | 30 Jan 2023 | ||
| Paul J. Tufano | Director | $19,521,298 | Mixed | 25 Jun 2026 | ||
| Timothy E. Guertin | Director | $6,651,783 | Mixed | 15 Mar 2024 | ||
| Marilyn Matz | Director | $5,786,714 | -$1,346,392 | -19% | Filing P/S | 15 Jul 2026 |
| Brad Robbins | President, LitePoint Corp. | $5,597,563 | Mixed | 29 Jan 2024 | ||
| Shannon John Poulin | President, Semiconductor Test | $5,581,160 | -$581,013 | -9.4% | Filing P/S | 21 May 2026 |
| Peter Herweck | Director | $4,802,948 | Mixed | 25 Jun 2026 | ||
| Edwin J. Gillis | Director | $4,575,690 | Mixed | 17 Mar 2023 | ||
| Walter G. Vahey | Exec. VP, Corp. Development | $4,330,763 | Mixed | 28 Jan 2022 | ||
| Sanjay Mehta | VP and Chief Financial Officer | $4,077,884 | Filing P/S | 04 Feb 2025 | ||
| Regan Mills | President, Product Test | $3,900,513 | -$341,078 | -8% | Filing P/S | 08 Apr 2026 |
| Mercedes Johnson | Director | $3,636,778 | -$1,289,342 | -26% | Mixed | 01 Jul 2026 |
| Ernest E. Maddock | Director | $3,043,754 | Mixed | 12 Jun 2026 | ||
| Ryan E. Driscoll | VP, General Counsel, Secretary | $2,894,419 | -$256,768 | -8.1% | Filing P/S | 07 May 2026 |
| Jean Pierre Hathout | President, Teradyne Robotics | $2,885,445 | Mixed | 01 Jun 2026 | ||
| Richard John Burns | President, Semiconductor Test | $2,808,517 | Filing P/S | 04 Feb 2025 | ||
| Charles Jeffrey Gray | VP, General Counsel, Secretary | $2,613,883 | Mixed | 29 Jan 2024 | ||
| Michael A. Bradley | Director | $2,585,227 | Mixed | 16 Dec 2021 | ||
| Bridget A. van Kralingen | Director | $1,845,167 | Mixed | 08 May 2026 |
Recent insider transactions for TERADYNE, INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Gregory Stephen Smith | TER | Common Stock | Sale | -3.32% | $1,425,240 | $356.31 | -4,000 | 116,495 | 15 Jul 2026 | Direct |
| Marilyn Matz | TER | Common Stock | Sale | -6.88% | $427,572 | $356.31 | -1,200 | 16,241 | 15 Jul 2026 | Direct |
| Mercedes Johnson | TER | Common Stock | Sale | -2.43% | $76,820 | $460.00 | -167 | 6,697 | 01 Jul 2026 | Direct |
| Paul J. Tufano | TER | Common Stock | Award | 0.18% | 116 | 65,848 | 25 Jun 2026 | Direct | ||
| Andrew Chisholm Henry | TER | Common Stock | Award | 1.81% | 52 | 2,927 | 25 Jun 2026 | Direct | ||
| Peter Herweck | TER | Common Stock | Award | 0.39% | 63 | 16,201 | 25 Jun 2026 | Direct | ||
| Marilyn Matz | TER | Common Stock | Sale | -6.44% | $507,636 | $423.03 | -1,200 | 17,441 | 15 Jun 2026 | Direct |
| Gregory Stephen Smith | TER | Common Stock | Sale | -3.21% | $1,692,120 | $423.03 | -4,000 | 120,470 | 15 Jun 2026 | Direct |
| Ernest E. Maddock | TER | Common Stock | Other | 0.02% | 2 | 10,267 | 12 Jun 2026 | Direct | ||
| Peter Herweck | TER | Common Stock | Other | 0.02% | 4 | 16,138 | 12 Jun 2026 | Direct | ||
| Paul J. Tufano | TER | Common Stock | Other | 0.03% | 19 | 65,732 | 12 Jun 2026 | Direct | ||
| Jean Pierre Hathout | TER | Common Stock | Tax liability | -1.76% | -174 | 9,733 | 02 Jun 2026 | Direct | ||
| Mercedes Johnson | TER | Common Stock | Sale | -2.38% | $61,747 | $369.74 | -167 | 6,864 | 02 Jun 2026 | Direct |
| Jean Pierre Hathout | TER | Common Stock | Tax liability | -2.62% | -267 | 9,907 | 01 Jun 2026 | Direct | ||
| Shannon John Poulin | TER | Common Stock | Sale | -4.01% | $232,880 | $355.00 | -656 | 15,722 | 22 May 2026 | Direct |
| Shannon John Poulin | TER | Common Stock | Tax liability | -8.55% | -1,531 | 16,378 | 21 May 2026 | Direct | ||
| Shannon John Poulin | TER | Common Stock | Options Exercise | 18.9% | 2,843 | 17,909 | 21 May 2026 | Direct | ||
| Shannon John Poulin | TER | Common Stock | Sale | -6.27% | $348,133 | $345.37 | -1,008 | 15,066 | 21 May 2026 | Direct |
| Shannon John Poulin | TER | Stock Option (Right to Buy) | Options Exercise | -25% | -2,843 | 8,532 | 21 May 2026 | Direct | ||
| Marilyn Matz | TER | Common Stock | Sale | -2.1% | $140,000 | $350.00 | -400 | 18,641 | 21 May 2026 | Direct |
| Gregory Stephen Smith | TER | Common Stock | Sale | -6.46% | $2,914,211 | $338.98 | -8,597 | 124,470 | 15 May 2026 | Direct |
| Gregory Stephen Smith | TER | Common Stock | Options Exercise | 3.58% | 4,597 | 133,067 | 15 May 2026 | Direct | ||
| Gregory Stephen Smith | TER | Stock Option (Right to Buy) | Options Exercise | -100% | -4,597 | 0 | 15 May 2026 | Direct | ||
| Marilyn Matz | TER | Common Stock | Sale | -4.03% | $271,184 | $338.98 | -800 | 19,041 | 15 May 2026 | Direct |
| Peter Herweck | TER | Common Stock | Award | 4.32% | 668 | 16,134 | 08 May 2026 | Direct | ||
| Mercedes Johnson | TER | Common Stock | Award | 10.5% | 668 | 7,031 | 08 May 2026 | Direct | ||
| Marilyn Matz | TER | Common Stock | Award | 3.48% | 668 | 19,841 | 08 May 2026 | Direct | ||
| Bridget A. van Kralingen | TER | Common Stock | Award | 12% | 668 | 6,224 | 08 May 2026 | Direct | ||
| Paul J. Tufano | TER | Common Stock | Award | 1.03% | 668 | 65,713 | 08 May 2026 | Direct | ||
| Necip Sayiner | TER | Common Stock | Award | 31.3% | 668 | 2,800 | 08 May 2026 | Direct | ||
| Ernest E. Maddock | TER | Common Stock | Award | 6.96% | 668 | 10,265 | 08 May 2026 | Direct | ||
| Andrew Chisholm Henry | TER | Common Stock | Award | 30.3% | 668 | 2,875 | 08 May 2026 | Direct | ||
| Ryan E. Driscoll | TER | Common Stock | Sale | -8.15% | $256,768 | $377.60 | -680 | 7,665 | 07 May 2026 | Direct |
| Regan Mills | TER | Common Stock | Sale | -0.14% | $5,475 | $342.17 | -16 | 11,399 | 08 Apr 2026 | Direct |
| Mercedes Johnson | TER | Common Stock | Sale | -8.94% | $195,125 | $312.20 | -625 | 6,363 | 06 Apr 2026 | Direct |
| Regan Mills | TER | Common Stock | Sale | -2.16% | $73,302 | $290.88 | -252 | 11,415 | 02 Apr 2026 | Direct |
| Shannon John Poulin | TER | Common Stock | Tax liability | -6.74% | -1,162 | 16,074 | 01 Apr 2026 | Direct | ||
| Regan Mills | TER | Common Stock | Tax liability | -1.87% | -222 | 11,667 | 01 Apr 2026 | Direct | ||
| Peter Herweck | TER | Common Stock | Award | 0.6% | 92 | 15,466 | 26 Mar 2026 | Direct | ||
| Paul J. Tufano | TER | Common Stock | Award | 0.25% | 159 | 65,045 | 26 Mar 2026 | Direct | ||
| Andrew Chisholm Henry | TER | Common Stock | Award | 3.52% | 75 | 2,207 | 26 Mar 2026 | Direct | ||
| Ernest E. Maddock | TER | Common Stock | Other | 0.02% | 2 | 9,597 | 13 Mar 2026 | Direct | ||
| Paul J. Tufano | TER | Common Stock | Other | 0.04% | 25 | 64,886 | 13 Mar 2026 | Direct | ||
| Peter Herweck | TER | Common Stock | Other | 0.03% | 5 | 15,374 | 13 Mar 2026 | Direct | ||
| Mercedes Johnson | TER | Common Stock | Sale | -8.21% | $187,000 | $299.20 | -625 | 6,988 | 05 Mar 2026 | Direct |
| Regan Mills | TER | Common Stock | Sale | -6.22% | $262,302 | $332.87 | -788 | 11,889 | 25 Feb 2026 | Direct |
| Mercedes Johnson | TER | Common Stock | Sale | -7.59% | $166,862 | $266.98 | -625 | 7,613 | 05 Feb 2026 | Direct |
| Gregory Stephen Smith | TER | Common Stock | Award | 11.6% | 13,380 | 128,470 | 04 Feb 2026 | Direct | ||
| Gregory Stephen Smith | TER | Stock Option (Right to Buy) | Award | 11,810 | 11,810 | 04 Feb 2026 | Direct | |||
| Shannon John Poulin | TER | Common Stock | Award | 34.9% | 4,460 | 17,236 | 04 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.