Teradyne, Inc.
MX ˙ BMV ˙ US8807701029
SecurityMX:TER / Teradyne, Inc.
InstitutionNational Pension Service
Latest Disclosed Ownership323,718 shares
Latest Disclosed Value $ 95,969,438
National Pension Service reports 32.45% increase in ownership of TER / Teradyne, Inc.

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 323,718 shares of Teradyne, Inc. (MX:TER) valued at $95,969,438 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 244,400 shares of Teradyne, Inc.. This represents a change in shares of 32.45% during the quarter.

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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F TERADYNE COM 880770102 323,718 79,318 32.45 95,969 102.87 0.0729
2026-02-10 2025-12-31 13F TERADYNE TERADYNE INC 880770102 244,400 244,400 47,306 0.0350
2025-05-13 2025-03-31 13F TERADYNE COM 880770102 0 -252,482 -100.00 0 -100.00
2025-02-05 2024-12-31 13F TERADYNE COM 880770102 252,482 10,430 4.31 31,793 -1.93 0.0301
2024-10-30 2024-09-30 13F TERADYNEINC COM 880770102 242,052 -102 -0.04 32,418 -9.72 0.0313
2024-08-13 2024-06-30 13F TERADYNE COM 880770102 242,154 -36,807 -13.19 35,909 14.09 0.0413
2024-05-14 2024-03-31 13F TERADYNE COM 880770102 278,961 14,486 5.48 31,475 9.67 0.0378
2024-02-07 2023-12-31 13F TERADYNE COM 880770102 264,475 0 0.00 28,701 13.24 0.0400
2023-11-15 2023-09-30 13F TERADYNE COM 880770102 264,475 9,459 3.71 25,345 -9.15 0.0406
2023-08-16 2023-06-30 13F TERADYNE COM 880770102 255,016 -18,633 -6.81 27,899 -5.25 0.0450
2023-05-12 2023-03-31 13F TERADYNE COM 880770102 273,649 -17,997 -6.17 29,445 15.58 0.0536
2023-02-24 2022-12-31 13F/A-1 TERADYNE COM 880770102 291,646 1,496 0.52 25,475 13.78 0.0501
2023-02-21 2022-12-31 13F TERADYNE COM 880770102 291,646 1,496 25 0.0501
2023-02-24 2022-09-30 13F/A-1 TERADYNE COM 880770102 290,150 2,168 0.75 22,391 -13.18 0.0467
2022-11-18 2022-09-30 13F TERADYNE COM 880770102 290,150 2,168 22,391 0.0467
2022-08-17 2022-06-30 13F TERADYNE COM 880770102 287,982 3,871 1.36 25,789 -23.22 0.0532
2022-05-13 2022-03-31 13F TERADYNE COM 880770102 284,111 10,656 3.90 33,590 -24.88 0.0613
2022-02-15 2021-12-31 13F TERADYNE COM 880770102 273,455 -6,772 -2.42 44,718 46.18 0.0780
2021-11-18 2021-09-30 13F TERADYNE COM 880770102 280,227 -600 -0.21 30,592 -18.68 0.0583
2021-08-17 2021-06-30 13F TERADYNE COM 880770102 280,827 2,939 1.06 37,620 11.26 0.0715
2021-05-14 2021-03-31 13F TERADYNE COM 880770102 277,888 1,681 0.61 33,813 2.11 0.0707
2021-02-19 2020-12-31 13F TERADYNE NOTE 880770102 276,207 -22,077 -7.40 33,114 40.17 0.0755
2020-11-13 2020-09-30 13F TERADYNE NOTE 880770102 298,284 0 0.00 23,624 -6.28 0.0620
2020-08-11 2020-06-30 13F TERADYNE NOTE 880770102 298,284 298,284 25,208 0.0720
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.