Teradyne TER Insider Ownership

NASDAQ TER

$325.03 -18.18 (-5.30%)

As of: Oct 16, 2026 · 3:59 PM EDT

Insider Holdings by Owner

824.94K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

0.246%

▼-0.010% pp QoQ

Shares Held by Insiders

385.51K

filed for Sep 2026

▼-3.93% QoQ

Shares Outstanding

156.47Mn

156,470,000 shares

Direct Holdings

385.51K

Indirect: 0

Net Shares Traded (QoQ)

-15.77K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 11, 2026

Over the past 12 months, Teradyne insiders sold $14.19 million of stock on the open market (40.8K shares) and made no open-market purchases.

A count shows 6 insiders selling TER stock on the open market over the past 12 months and none buying.
Gregory Stephen Smith (President and CEO) led open-market sales of Teradyne stock over the past 12 months with $9.51 million (26.81K shares), most recently on September 15, 2026.
The newest open-market trade among Teradyne insiders came on October 1, 2026, when Mercedes Johnson (Director) made a sale of 167 shares for $67,284.
In transactions other than open-market trades, Teradyne insiders received 93.16K shares in stock awards, acquired 9.51K shares through option exercises and conversions and gave up 44.13K shares to cover taxes or exercise prices over the past 12 months.
Business Quant data puts insider holdings in TER at 385.34K shares across insiders' latest Form 4 filings, down 3.97% from 401.28K shares at the end of Q2 2026.
None of the 385.34K shares held by Teradyne insiders is held through trusts, partnerships or family members; all are direct holdings.
Per Business Quant, 19 insiders of TER hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
Teradyne's top three insider holders by shares held are Gregory Stephen Smith (President and CEO, 108.5K shares), Paul J. Tufano (Director, 66.01K shares) and Sanjay Mehta (VP and Chief Financial Officer, 36.58K shares).
Gregory Stephen Smith holds 28.16% of the combined insider position in Teradyne.
Institutional investors held 97.29% of Teradyne stock at the end of Q2 2026, while the latest Form 4 filings of its insiders account for about 0.25%; other investors, including the public, hold roughly 2.46%.
In the last 12 months, 74 Form 4 filings with transactions in TER stock came from 14 insiders.
This summary of Teradyne insider activity covers Form 4 filings through October 2, 2026.

Form 4 Holdings

Insiders Holding TER

Insiders 26

Shares held 824.94K

Of outstanding 0.527%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Mark E Jagiela	Ceo	208,600	208,600	25.3%	31 Jan, 2023
2	Gregory Stephen Smith	President And Ceo	108,495	108,495	13.2%	16 Sep, 2026
3	Paul J Tufano	Director	66,008	66,008	8.0%	28 Sep, 2026
4	Timothy E Guertin	Director	62,729	62,729	7.6%	19 Mar, 2024
5	Brad Robbins	President, Litepoint Corp.	52,772	52,772	6.4%	31 Jan, 2024
6	Edwin J Gillis	Director	43,921	43,921	5.3%	21 Mar, 2023
7	Walter G. Vahey	Exec. Vp, Corp. Development	41,570	41,570	5.0%	01 Feb, 2022
8	Sanjay Mehta	Vp And Chief Financial Officer	36,576	36,576	4.4%	05 Feb, 2025
9	Richard John Burns	President, Semiconductor Test	25,191	25,191	3.1%	05 Feb, 2025
10	Charles Jeffrey Gray	Vp, General Counsel, Secretary	24,643	24,643	3.0%	31 Jan, 2024
11	Ujjwal Kumar	President, Teradyne Robotics	16,369	16,369	2.0%	05 Aug, 2025
12	Peter Herweck	Director	16,282	16,282	2.0%	28 Sep, 2026
13	Shannon John Poulin	President, Semiconductor Test	15,722	15,722	1.9%	26 May, 2026
14	John Francis Wood	President, System Test Group	14,137	14,137	1.7%	04 Feb, 2025
15	Marilyn Matz	Director	13,841	13,841	1.7%	18 Sep, 2026
16	Regan Mills	President, Product Test	11,399	11,399	1.4%	09 Apr, 2026
17	Michelle L. Turner	Chief Financial Officer	11,260	11,260	1.4%	05 Nov, 2025
18	Ernest E Maddock	Director	10,269	10,269	1.2%	28 Sep, 2026
19	Jean Pierre Hathout	President, Teradyne Robotics	9,733	9,733	1.2%	03 Jun, 2026
20	Ryan Driscoll	Vp, General Counsel, Secretary	7,665	7,665	0.9%	11 May, 2026
21	Kralingen Bridget A Van	Director	6,224	6,224	0.8%	12 May, 2026
22	Mercedes Johnson	Director	6,197	6,197	0.8%	02 Oct, 2026
23	Ford Tamer	Director	5,359	5,359	0.6%	16 May, 2023
24	John Lukez	President, Litepoint Corp.	4,185	4,185	0.5%	04 Feb, 2025
25	Andrew Chisholm Henry	Director	2,991	2,991	0.4%	28 Sep, 2026
26	Necip Sayiner	Director	2,800	2,800	0.3%	12 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,155 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	Mercedes Johnson	Director	Disposed S	167	$402.90	$67.28K	6,197	Direct
24 Sep, 2026	Paul J Tufano	Director	Acquired A	141	$0.00	$0	65,989	Direct
24 Sep, 2026	Andrew Chisholm Henry	Director	Acquired A	64	$0.00	$0	2,991	Direct
25 Sep, 2026	Ernest E Maddock	Director	Acquired J	2	$0.00	$0	10,269	Direct
24 Sep, 2026	Peter Herweck	Director	Acquired A	77	$0.00	$0	16,278	Direct
25 Sep, 2026	Peter Herweck	Director	Acquired J	4	$0.00	$0	16,282	Direct
25 Sep, 2026	Paul J Tufano	Director	Acquired J	19	$0.00	$0	66,008	Direct
17 Sep, 2026	Marilyn Matz	Director	Disposed S	400	$351.11	$140.44K	13,841	Direct
15 Sep, 2026	Gregory Stephen Smith	President And Ceo	Disposed S	4,000	$337.83	$1.35Mn	108,495	Direct
15 Sep, 2026	Marilyn Matz	Director	Disposed S	800	$337.83	$270.26K	14,241	Direct
01 Sep, 2026	Mercedes Johnson	Director	Disposed S	167	$341.30	$57.00K	6,364	Direct
17 Aug, 2026	Gregory Stephen Smith	President And Ceo	Disposed S	4,000	$425.00	$1.70Mn	112,495	Direct
17 Aug, 2026	Marilyn Matz	Director	Disposed S	1,200	$425.00	$510.00K	15,041	Direct
03 Aug, 2026	Mercedes Johnson	Director	Disposed S	166	$358.15	$59.45K	6,531	Direct
15 Jul, 2026	Gregory Stephen Smith	President And Ceo	Disposed S	4,000	$356.31	$1.43Mn	116,495	Direct
15 Jul, 2026	Marilyn Matz	Director	Disposed S	1,200	$356.31	$427.57K	16,241	Direct
01 Jul, 2026	Mercedes Johnson	Director	Disposed S	167	$460.00	$76.82K	6,697	Direct
25 Jun, 2026	Andrew Chisholm Henry	Director	Acquired A	52	$0.00	$0	2,927	Direct
25 Jun, 2026	Paul J Tufano	Director	Acquired A	116	$0.00	$0	65,848	Direct
25 Jun, 2026	Peter Herweck	Director	Acquired A	63	$0.00	$0	16,201	Direct

Showing 1 to 20 of 3,155 transactions