Teradyne, Inc.
MX ˙ BMV ˙ US8807701029
SecurityMX:TER / Teradyne, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership121,314 shares
Latest Disclosed Value $ 35,964,748
Robeco Institutional Asset Management B.V. reports 701.23% increase in ownership of TER / Teradyne, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 121,314 shares of Teradyne, Inc. (MX:TER) valued at $35,964,748 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 15,141 shares of Teradyne, Inc.. This represents a change in shares of 701.23% 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)
2026-04-21 2026-03-31 13F TERADYNE COM 880770102 121,314 106,173 701.23 35,965 1,127.44 0.0513
2026-01-23 2025-12-31 13F TERADYNE COM 880770102 15,141 587 4.03 2,931 46.28 0.0042
2025-10-22 2025-09-30 13F TERADYNE COM 880770102 14,554 -8,312 -36.35 2,003 -2.58 0.0029
2025-07-18 2025-06-30 13F TERADYNE COM 880770102 22,866 -46,332 -66.96 2,056 -64.02 0.0033
2025-04-23 2025-03-31 13F TERADYNE COM 880770102 69,198 -24,721 -26.32 5,716 -51.67 0.0111
2025-01-23 2024-12-31 13F TERADYNE COM 880770102 93,919 -55,366 -37.09 11,826 -40.85 0.0224
2024-10-29 2024-09-30 13F TERADYNE COM 880770102 149,285 58,688 64.78 19,994 48.82 0.0397
2024-07-23 2024-06-30 13F TERADYNE COM 880770102 90,597 4,608 5.36 13,435 38.47 0.0289
2024-04-24 2024-03-31 13F TERADYNE COM 880770102 85,989 -401 -0.46 9,702 3.49 0.0211
2024-02-14 2023-12-31 13F/A-1 TERADYNE COM 880770102 86,390 38,690 81.11 9,375 95.68 0.0227
2024-02-08 2023-12-31 13F TERADYNE COM 880770102 85,226 37,526 86 0.0162
2023-10-24 2023-09-30 13F TERADYNE COM 880770102 47,700 -24,351 -33.80 4,792 -40.27 0.0128
2023-07-24 2023-06-30 13F TERADYNE COM 880770102 72,051 1,748 2.49 8,021 6.13 0.0210
2023-05-04 2023-03-31 13F TERADYNE COM 880770102 70,303 -333,795 -82.60 7,558 -78.59 0.0206
2023-02-07 2022-12-31 13F TERADYNE COM 880770102 404,098 -152,252 -27.37 35,298 -15.58 0.1017
2022-12-01 2022-09-30 13F/A-1 TERADYNE COM 880770102 556,350 41,092 7.98 41,811 -9.39 0.1351
2022-10-27 2022-09-30 13F TERADYNE COM 880770102 654,035 41,177 49,152 0.1567
2022-12-01 2022-06-30 13F/A-1 TERADYNE COM 880770102 515,258 28,977 5.96 46,142 -19.74 0.1434
2022-07-27 2022-06-30 13F TERADYNE COM 880770102 612,858 28,977 54,882 0.1681
2022-12-01 2022-03-31 13F/A-1 TERADYNE COM 880770102 486,281 43,543 9.83 57,493 -20.59 0.1354
2022-04-26 2022-03-31 13F TERADYNE COM 880770102 583,881 141,143 69,032 0.1607
2022-12-01 2021-12-31 13F/A-1 TERADYNE COM 880770102 442,738 -60,398 -12.00 72,404 31.82 0.1541
2022-01-31 2021-12-31 13F TERADYNE COM 880770102 442,738 -60,398 72,404 0.1522
2022-12-01 2021-09-30 13F/A-1 TERADYNE COM 880770102 503,136 31,162 6.60 54,926 -13.13 0.1218
2021-10-20 2021-09-30 13F TERADYNE COM 880770102 503,136 31,162 54,926 0.1202
2022-12-01 2021-06-30 13F/A-1 TERADYNE COM 880770102 471,974 4,168 0.89 63,226 11.07 0.1402
2021-07-28 2021-06-30 13F TERADYNE COM 880770102 471,974 4,168 63,226 0.1382
2022-12-01 2021-03-31 13F/A-1 TERADYNE COM 880770102 467,806 22,793 5.12 56,923 6.69 0.1403
2021-04-23 2021-03-31 13F TERADYNE COM 880770102 467,806 22,793 56,923 0.1383
2022-12-01 2020-12-31 13F/A-1 TERADYNE COM 880770102 445,013 -105,332 -19.14 53,353 22.01 0.1402
2021-01-28 2020-12-31 13F TERADYNE COM 880770102 445,013 -105,332 53,353 0.1385
2021-01-19 2020-09-30 13F/A-1 TERADYNE COM 880770102 550,345 22,207 4.20 43,730 -2.03 0.1352
2020-10-29 2020-09-30 13F TERADYNE COM 880770102 550,345 22,207 43,730 135,052.4723
2021-01-19 2020-06-30 13F/A-1 TERADYNE COM 880770102 528,138 -26,597 -4.79 44,634 48.54 0.1516
2020-07-20 2020-06-30 13F TERADYNE COM 880770102 528,138 -26,597 44,634 151,451.1233
2021-01-19 2020-03-31 13F/A-1 TERADYNE COM 880770102 554,735 -5,316 -0.95 30,049 -21.31 0.1205
2020-04-30 2020-03-31 13F TERADYNE COM 880770102 554,735 -5,316 30,049 120,443.1687
2021-01-19 2019-12-31 13F/A-1 TERADYNE COM 880770102 560,051 313,996 127.61 38,188 167.99 0.1223
2020-02-06 2019-12-31 13F TERADYNE COM 880770102 560,051 313,996 38,188 122,141.3814
2021-01-19 2019-09-30 13F/A-1 TERADYNE COM 880770102 246,055 -32,048 -11.52 14,250 6.94 0.0503
2019-10-17 2019-09-30 13F TERADYNE COM 880770102 246,055 -32,048 14,250 50,237.1103
2021-01-19 2019-06-30 13F/A-1 TERADYNE COM 880770102 278,103 12,198 4.59 13,325 25.79 0.0471
2019-07-19 2019-06-30 13F TERADYNE COM 880770102 278,103 12,198 13,325 46,987.4354
2021-01-19 2019-03-31 13F/A-1 TERADYNE COM 880770102 265,905 -2,218 -0.83 10,593 25.96 0.0390
2019-05-02 2019-03-31 13F TERADYNE COM 880770102 265,905 -2,218 10,593 38,893.7277
2021-01-19 2018-12-31 13F/A-1 TERADYNE COM 880770102 268,123 2,291 0.86 8,410 -14.45 0.0378
2019-02-08 2018-12-31 13F TERADYNE COM 880770102 268,123 2,291 8,410 37,697.4082
2021-01-19 2018-09-30 13F/A-1 TERADYNE COM 880770102 265,832 -323,853 -54.92 9,831 -56.21 0.0389
2018-10-25 2018-09-30 13F TERADYNE COM 880770102 265,832 -323,853 9,831
2021-01-19 2018-06-30 13F/A-1 TERADYNE COM 880770102 589,685 -49,561 -7.75 22,448 -23.18 0.1023
2018-08-03 2018-06-30 13F TERADYNE COM 880770102 589,685 -49,561 22,448
2021-01-19 2018-03-31 13F/A-1 TERADYNE COM 880770102 639,246 65,918 11.50 29,220 21.71 0.1371
2018-05-07 2018-03-31 13F TERADYNE COM 880770102 639,246 65,918 29,220 136,648.2714
2021-01-19 2017-12-31 13F/A-1 TERADYNE COM 880770102 573,328 -148,404 -20.56 24,007 -10.79 0.1244
2018-01-25 2017-12-31 13F TERADYNE COM 880770102 573,328 -148,404 24,007
2021-01-19 2017-09-30 13F/A-1 TERADYNE COM 880770102 721,732 3,200 0.45 26,912 24.73 0.1671
2017-10-17 2017-09-30 13F TERADYNE COM 880770102 721,732 3,200 26,912 166,729.2810
2021-01-19 2017-06-30 13F/A-1 TERADYNE COM 880770102 718,532 150,351 26.46 21,577 22.10 0.1390
2017-08-07 2017-06-30 13F TERADYNE COM 880770102 718,532 150,351 21,577 140,483.6474
2021-01-19 2017-03-31 13F/A-1 TERADYNE COM 880770102 568,181 96,650 20.50 17,671 47.55 0.1177
2017-05-15 2017-03-31 13F TERADYNE COM 880770102 568,181 96,650 17,671 117,369.7149
2017-02-09 2016-12-31 13F TERADYNE COM 880770102 471,531 465,164 7,305.86 11,976 8,641.61 0.0937
2016-11-07 2016-09-30 13F TERADYNE COM 880770102 6,367 6,367 137 0.0010
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.