Vanguard Group Inc ownership in TER / Teradyne, Inc.

泰瑞達公司

US ˙ NasdaqGS ˙ US8807701029

Security	TER / Teradyne, Inc.
Institution	Vanguard Group Inc
Latest Disclosed Ownership	20,972,755 shares
Ownership	13.07%

2025-07-29 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 20,972,755 shares of Teradyne, Inc. (US:TER). This represents 13.07 percent ownership of the company. In their previous filing dated 2024-02-13 , Vanguard Group Inc had reported owning 18,285,878 shares, indicating an increase of 14.69 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2025-07-29	2025-07-29	13G/A	18,285,878	20,972,755	14.69	13.07	9.28
2024-02-13	2024-02-13	13G/A	18,024,838	18,285,878	1.45	11.96	3.37
2023-02-09	2023-02-09	13G/A	17,973,761	18,024,838	0.28	11.57	4.90
2022-02-10	2022-02-10	13G/A	19,095,271	17,973,761	-5.87	11.03	-4.09
2021-02-10	2021-02-10	13G/A	16,860,575	19,095,271	13.25	11.50	14.31
2020-02-12	2020-02-12	13G/A	17,458,038	16,860,575	-3.42	10.06	-0.20
2019-04-08	2019-04-08	13G/A	16,983,437	17,458,038	2.79	10.08	6.44
2019-02-12	2019-02-12	13G/A	16,983,437	16,983,437	0.00	9.47	0.00
2019-02-11	2019-02-11	13G/A	17,359,570	16,983,437	-2.17	9.47	7.13
2018-02-12	2018-02-12	13G/A	15,941,214	17,359,570	8.90	8.84	11.62
2017-02-10	2017-02-10	13G/A	14,121,381	15,941,214	12.89	7.92	15.28
2016-02-10	2016-02-10	13G/A		14,121,381		6.87
2015-02-10	2015-02-10	13G/A		13,133,592		6.06
2014-02-12	2014-02-12	13G/A		10,552,446		5.50
2013-02-11	2013-02-11	13G/A		12,660,384		6.73
2012-02-09	2012-02-09	13G/A		11,748,056		6.38

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-01-29	2025-12-31	13F	TERADYNE	COM	880770102	20,298,150	-1,119,567	-5.23	3,928,910	33.28	0.0570
2025-11-07	2025-09-30	13F	TERADYNE	COM	880770102	21,417,717	444,940	2.12	2,947,935	56.32	0.0441
2025-08-11	2025-06-30	13F	TERADYNE	COM	880770102	20,972,777	50,546	0.24	1,885,872	9.12	0.0305
2025-05-09	2025-03-31	13F	TERADYNE	COM	880770102	20,922,231	516,332	2.53	1,728,176	-32.74	0.0312
2025-02-11	2024-12-31	13F	TERADYNE	COM	880770102	20,405,899	92,428	0.46	2,569,511	-5.55	0.0448
2024-11-13	2024-09-30	13F	TERADYNE	COM	880770102	20,313,471	1,151,657	6.01	2,720,583	-4.26	0.0487
2024-08-13	2024-06-30	13F	TERADYNE	COM	880770102	19,161,814	740,628	4.02	2,841,505	36.71	0.0546
2024-05-10	2024-03-31	13F	TERADYNE	COM	880770102	18,421,186	135,286	0.74	2,078,462	4.74	0.0412
2024-03-11	2023-12-31	13F/A-1	TERADYNE	COM	880770102	18,285,900	89,511	0.49	1,984,386	8.55	0.0434
2024-02-14	2023-12-31	13F	TERADYNE	COM	880770102	18,285,900	89,511		1,984,386		0.0377
2023-12-18	2023-09-30	13F/A-1	TERADYNE	COM	880770102	18,196,389	-71,706	-0.39	1,828,009	-10.12	0.0449
2023-11-14	2023-09-30	13F	TERADYNE	COM	880770102	18,196,389	-71,706		1,828,009		0.0081
2023-08-14	2023-06-30	13F	TERADYNE	COM	880770102	18,268,095	89,317	0.49	2,033,787	4.06	0.0482
2023-07-14	2023-03-31	13F/A-1	TERADYNE	COM	880770102	18,178,778	153,940	0.85	1,954,400	24.13	0.0498
2023-05-15	2023-03-31	13F	TERADYNE	COM	880770102	18,178,778	153,940		1,954,400		0.0498
2023-02-10	2022-12-31	13F	TERADYNE	COM	880770102	18,024,838	128,323	0.72	1,574,470	17.07	0.0429
2022-11-14	2022-09-30	13F	TERADYNE	COM	880770102	17,896,515	-182,314	-1.01	1,344,923	-16.93	0.0396
2022-08-12	2022-06-30	13F	TERADYNE	COM	880770102	18,078,829	-49,377	-0.27	1,618,959	-24.46	0.0455
2022-05-13	2022-03-31	13F	TERADYNE	COM	880770102	18,128,206	154,445	0.86	2,143,298	-27.08	0.0507
2022-02-14	2021-12-31	13F	TERADYNE	COM	880770102	17,973,761	-194,633	-1.07	2,939,249	48.19	0.0667
2021-11-12	2021-09-30	13F	TERADYNE	COM	880770102	18,168,394	-201,126	-1.09	1,983,444	-19.40	0.0493
2021-08-13	2021-06-30	13F	TERADYNE	COM	880770102	18,369,520	-621,367	-3.27	2,460,781	6.49	0.0612
2021-05-14	2021-03-31	13F	TERADYNE	COM	880770102	18,990,887	-104,384	-0.55	2,310,810	0.94	0.0625
2021-02-12	2020-12-31	13F	TERADYNE	COM	880770102	19,095,271	52,296	0.27	2,289,333	51.30	0.0664
2020-11-16	2020-09-30	13F	TERADYNE	COM	880770102	19,042,975	2,419,684	14.56	1,513,155	7.71	0.0501
2020-08-14	2020-06-30	13F	TERADYNE	COM	880770102	16,623,291	-297,726	-1.76	1,404,834	53.26	0.0498
2020-05-15	2020-03-31	13F	TERADYNE	COM	880770102	16,921,017	60,442	0.36	916,612	-20.28	0.0391
2020-02-14	2019-12-31	13F	TERADYNE	COM	880770102	16,860,575	-154,267	-0.91	1,149,722	16.68	0.0392
2019-11-14	2019-09-30	13F	TERADYNE	COM	880770102	17,014,842	-336,996	-1.94	985,329	18.52	0.0365
2019-08-14	2019-06-30	13F	TERADYNE	COM	880770102	17,351,838	-106,200	-0.61	831,326	19.52	0.0313
2019-05-15	2019-03-31	13F	TERADYNE	COM	880770102	17,458,038	474,601	2.79	695,528	30.51	0.0273
2019-02-14	2018-12-31	13F	TERADYNE	COM	880770102	16,983,437	-287,688	-1.67	532,940	-16.56	0.0239
2018-12-13	2018-09-30	13F/A-2	TERADYNE	COM	880770102	17,271,125	-289,772	-1.65	638,686	-4.47	0.0250
2018-11-23	2018-09-30	13F/A-1	TERADYNE	COM	880770102	17,271,125	0		638,686		0.0250
2018-11-14	2018-09-30	13F	TERADYNE	COM	880770102	17,271,125	-289,772		638,686
2018-08-14	2018-06-30	13F	TERADYNE	COM	880770102	17,560,897	-317,985	-1.78	668,542	-18.20	0.0280
2018-05-15	2018-03-31	13F	TERADYNE	COM	880770102	17,878,882	519,312	2.99	817,244	12.44	0.0357
2018-02-14	2017-12-31	13F	TERADYNE	COM	880770102	17,359,570	128,569	0.75	726,845	13.12	0.0318
2017-11-14	2017-09-30	13F	TERADYNE	COM	880770102	17,231,001	29,684	0.17	642,544	24.39	0.0300
2017-08-24	2017-06-30	13F/A-1	TERADYNE	COM	880770102	17,201,317	458,103	2.74	516,555	-0.80	0.0254
2017-08-11	2017-06-30	13F	TERADYNE	COM	880770102	17,201,317	458,103		516,555
2017-05-12	2017-03-31	13F	TERADYNE	COM	880770102	16,743,214	802,000	5.03	520,713	28.60	0.0268
2017-02-14	2016-12-31	13F	TERADYNE	COM	880770102	15,941,214	595,927	3.88	404,908	22.27	0.0226
2016-11-14	2016-09-30	13F	TERADYNE	COM	880770102	15,345,287	348,699	2.33	331,151	12.15	0.0195
2016-08-10	2016-06-30	13F	TERADYNE	COM	880770102	14,996,588	497,069	3.43	295,283	-5.67	0.0183
2016-05-13	2016-03-31	13F	TERADYNE	COM	880770102	14,499,519	378,138	2.68	313,045	7.25	0.0203
2016-02-08	2015-12-31	13F	TERADYNE	COM	880770102	14,121,381	77,722	0.55	291,890	15.40	0.0196
2015-11-12	2015-09-30	13F/A-1	TERADYNE	COM	880770102	14,043,659	-55,453	-0.39	252,927	-7.00	0.0107
2015-11-12	2015-09-30	13F/A-1	TERADYNE	COM	880770102	14,043,659	-55,453		252,927		0.0107
2015-08-13	2015-06-30	13F	TERADYNE	COM	880770102	14,099,112	307,941	2.23	271,971	4.62	0.0184
2015-05-15	2015-03-31	13F/A-1	TERADYNE	COM	880770102	13,791,171	657,579	5.01	259,964	0.02	0.0176
2015-05-14	2015-03-31	13F	TERADYNE	COM	880770102	13,791,171			259,964
2015-02-12	2014-12-31	13F	TERADYNE	COM	880770102	13,133,592	1,038,033	8.58	259,914	10.82	0.0187
2014-11-12	2014-09-30	13F	TERADYNE	COM	880770102	12,095,559	695,323	6.10	234,532	4.96	0.0183
2014-08-11	2014-06-30	13F	TERADYNE	COM	880770102	11,400,236	327,004	2.95	223,445	1.45	0.0176
2014-05-13	2014-03-31	13F	TERADYNE	COM	880770102	11,073,232	520,786	4.94	220,246	18.45	0.0185
2014-02-12	2013-12-31	13F	TERADYNE	COM	880770102	10,552,446	-2,492,226	-19.11	185,934	-13.72	0.0164
2013-11-07	2013-09-30	13F	TERADYNE	COM	880770102	13,044,672	119,346	0.92	215,498	-5.11	0.0210
2013-08-13	2013-06-30	13F	TERADYNE	COM	880770102	12,925,326	12,925,326		227,098		0.0238

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.