Skip to main content
TECHi home
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy

NASDAQ · Technology · Holders

Teradyne Inc. (TER) Institutional Ownership & Insider Trading History

Top TER institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.

Section freshness

Prices as of Sep 28, 4:00 PM EDT · Fundamentals checked Sep 29, 6:21 AM EDT · Statements Jun 28, 2026

Ownership read

TER insider transaction activity: Net selling.

Blackrock Inc. is the largest institutional holder. 59 sales and 0 purchases appear in the recent Form 4 filings. Use the filters below to separate open-market activity from option exercises, gifts, awards, and tax withholding.

Review insider tradesView institutions

Insider flow

TER

Purchases0
Sales73.97K

Directional bars ignore awards, gifts, conversions, and tax withholding rows.

Top holder

19.44M

Blackrock Inc.

Insider transaction activity

Net selling

$18.12M sold / $0.0000 bought

Observations shown

122

10 holder / 112 insider

Holder rows
10
Yahoo Finance · Filing dates shown per row
Increased / initiated
9
1 decreased · provider-reported changes
Insider rows
112
Yahoo Finance · Filing dates shown per row

Ownership concentration and transaction activity

Top 10 reported holders
41.39% outstanding
Changes with share-count history
Prior-position data unavailable
New / exited positions
0 / 0 explicitly reported
Largest increase with share-count history
Prior share counts unavailable

Reported-holder cohort only; absence from a limited provider list does not establish an exit. Changes are provider-reported and are only comparable quarter over quarter when the position periods match.

Net shares sold: 73,971

Sale-code S shares minus purchase-code P shares in this sample. Includes disclosed plans and unknown plan status; excludes grants, gifts, exercises and withholding. This is activity, not sentiment.

  • Purchase / sale; plan unknown: 59
  • Grant: 49
  • Conversion / exercise: 4

Top 10 institutional holders

Teradyne Inc. (TER) institutional ownership

Ranked by reported share count, with position changes and separate position and filing dates where ownership data supplies them.

Teradyne Inc. (TER) institutional ownership
#Institution% heldSharesChange %Position / filing date
1
Blackrock Inc.
11.2%19.44M+19.21%Position as of Jun 30, 2026Filing date unknown
2
Vanguard Capital Management LLC
5.89%10.23M+0.48%Position as of Jun 30, 2026Filing date unknown
3
Vanguard Portfolio Management LLC
4.97%8.63M+0.36%Position as of Jun 30, 2026Filing date unknown
4
State Street Corporation
4.20%7.29M+4.59%Position as of Jun 30, 2026Filing date unknown
5
Invesco Ltd.
3.85%6.68M+165.14%Position as of Jun 30, 2026Filing date unknown
6
JPMORGAN CHASE & CO
3.21%5.57M+94.04%Position as of Jun 30, 2026Filing date unknown
7
Geode Capital Management, LLC
2.65%4.60M+5.35%Position as of Jun 30, 2026Filing date unknown
8
FMR, LLC
2.36%4.11M+13.75%Position as of Jun 30, 2026Filing date unknown
9
Ameriprise Financial, Inc.
1.57%2.72M-4.38%Position as of Jun 30, 2026Filing date unknown
10
Van Eck Associates Corporation
1.50%2.61M+4.97%Position as of Jun 30, 2026Filing date unknown
Showing 10 of 10 matching institutional rows.

Recent insider transactions

Teradyne Inc. (TER) Form 4 filings

Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.

Teradyne Inc. (TER) Form 4 insider transactions
#Insider% companyActionSharesTransaction date
1
MATZ MARILYN
Director
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

800Sep 15, 2026
2
SMITH GREGORY STEPHEN
Chief Executive Officer
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

4.00KSep 15, 2026
3
JOHNSON MERCEDES
Director
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

167Sep 1, 2026
4
MATZ MARILYN
Director
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

1.20KAug 17, 2026
5
SMITH GREGORY STEPHEN
Chief Executive Officer
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

4.00KAug 17, 2026
6
JOHNSON MERCEDES
Director
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

166Aug 3, 2026
7
MATZ MARILYN
Director
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

1.20KJul 15, 2026
8
SMITH GREGORY STEPHEN
Chief Executive Officer
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

4.00KJul 15, 2026
9
JOHNSON MERCEDES
Director
<0.01%SaleOpen-market or direct sale reported on Form 4.
Transaction context
Classification:
Purchase / sale; plan unknown
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

167Jul 1, 2026
10
HERWECK PETER
Director
<0.01%Stock Award(Grant)Provider-supplied Form 4 action code. Review the original filing before making a trading judgment.
Transaction context
Classification:
Grant
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

63Jun 25, 2026
11
HENRY ANDREW CHISHOLM
Director
<0.01%Stock Award(Grant)Provider-supplied Form 4 action code. Review the original filing before making a trading judgment.
Transaction context
Classification:
Grant
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

52Jun 25, 2026
12
TUFANO PAUL J
Director
<0.01%Stock Award(Grant)Provider-supplied Form 4 action code. Review the original filing before making a trading judgment.
Transaction context
Classification:
Grant
10b5-1:
Unknown; not supplied by provider
Holdings after:
Not reported
Position sold:
Not calculable
Filed:
Not reported

Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership.

116Jun 25, 2026
Showing 12 of 112 matching Form 4 rows. Percent of company uses current shares outstanding.

Frequently asked

Common questions.

Who are the largest TER shareholders?

Blackrock Inc. is the largest reported institutional holder of TER, with 19.44 million shares, or about 11.19% of shares outstanding.

What does the institutional filing activity show for TER?

Teradyne Inc. has 10 institutional rows on file: 9 increased or initiated positions and 1 reduced them.

What insider transactions are available for TER?

TECHi shows 112 dated TER insider transactions through Sep 15, 2026, with transaction types kept separate so administrative actions are not presented as open-market trades.

Are TER insiders buying or selling?

The displayed TER activity reads Net selling: 59 sales and 0 purchases. Other transaction types remain separate.

Who is the most active reported TER insider?

SMITH GREGORY STEPHEN has the largest absolute share movement in the displayed TER filing rows, totaling 149,688 shares. The action labels provide the transaction context.

All data sources

Search the dated figures used for this view. Each entry identifies its units, reporting period and calculation status.

How to use this page

Use this to check who owns the float and whether insiders are active.

Best for Institutional concentration, insider transaction pattern, and float context.

Weak when Filings are delayed or transactions are administrative rather than economic.

Browse all companies and funds
Research tools
US market hours

Regular hours: 9:30 AM–4:00 PM America/New_York

Next open: Checking…

Exchange calendar includes scheduled holidays and early closes. Extended-session prices appear separately only when supplied by the quote source.