Teradyne, Inc.
MX ˙ BMV ˙ US8807701029
SecurityMX:TER / Teradyne, Inc.
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership1,090,120 shares
Latest Disclosed Value $ 323,176,975
Rafferty Asset Management, LLC reports 23.08% decrease in ownership of TER / Teradyne, Inc.

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 1,090,120 shares of Teradyne, Inc. (MX:TER) valued at $323,176,975 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,417,246 shares of Teradyne, Inc.. This represents a change in shares of -23.08% 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)
2026-05-15 2026-03-31 13F TERADYNE COM 880770102 1,090,120 -327,126 -23.08 323,177 17.81 1.3120
2026-02-13 2025-12-31 13F TERADYNE COM 880770102 1,417,246 22,978 1.65 274,322 42.95 0.9477
2025-11-12 2025-09-30 13F TERADYNE COM 880770102 1,394,268 -771,771 -35.63 191,907 -1.47 0.6224
2025-08-14 2025-06-30 13F TERADYNE COM 880770102 2,166,039 856,540 65.41 194,770 80.07 0.6425
2025-05-14 2025-03-31 13F TERADYNE COM 880770102 1,309,499 -111,192 -7.83 108,165 -39.54 0.4612
2025-02-14 2024-12-31 13F TERADYNE COM 880770102 1,420,691 -47,323 -3.22 178,893 -9.01 0.6331
2024-11-13 2024-09-30 13F TERADYNE COM 880770102 1,468,014 162,051 12.41 196,611 1.52 0.6736
2024-08-13 2024-06-30 13F TERADYNE COM 880770102 1,305,963 -111,656 -7.88 193,661 21.08 0.7189
2024-05-13 2024-03-31 13F TERADYNE COM 880770102 1,417,619 398,689 39.13 159,950 44.65 0.5967
2024-02-13 2023-12-31 13F TERADYNE COM 880770102 1,018,930 128,704 14.46 110,574 23.64 0.4663
2023-11-13 2023-09-30 13F TERADYNE COM 880770102 890,226 -67,443 -7.04 89,432 -16.12 0.5256
2023-08-11 2023-06-30 13F TERADYNE COM 880770102 957,669 214,033 28.78 106,617 33.36 0.6011
2023-05-11 2023-03-31 13F TERADYNE COM 880770102 743,636 109,142 17.20 79,948 44.25 0.5417
2023-02-13 2022-12-31 13F TERADYNE COM 880770102 634,494 48,328 8.24 55,423 25.82 0.4640
2022-11-14 2022-09-30 13F TERADYNE COM 880770102 586,166 -18,794 -3.11 44,050 -18.69 0.4688
2022-08-12 2022-06-30 13F TERADYNE COM 880770102 604,960 -137,478 -18.52 54,174 -38.28 0.4985
2022-05-13 2022-03-31 13F TERADYNE COM 880770102 742,438 132,124 21.65 87,778 -12.05 0.5203
2022-02-10 2021-12-31 13F TERADYNE COM 880770102 610,314 193,967 46.59 99,805 119.58 0.5253
2021-11-10 2021-09-30 13F TERADYNE COM 880770102 416,347 -112,339 -21.25 45,453 -35.82 0.3106
2021-08-10 2021-06-30 13F TERADYNE COM 880770102 528,686 55,548 11.74 70,823 23.02 0.4460
2021-05-10 2021-03-31 13F TERADYNE COM 880770102 473,138 246,939 109.17 57,571 112.29 0.3933
2021-02-10 2020-12-31 13F TERADYNE COM 880770102 226,199 -1,814 -0.80 27,119 49.68 0.2650
2020-11-13 2020-09-30 13F TERADYNE COM 880770102 228,013 32,125 16.40 18,118 9.45 0.2191
2020-08-07 2020-06-30 13F TERADYNE COM 880770102 195,888 120,661 160.40 16,554 306.23 0.2332
2020-05-15 2020-03-31 13F TERADYNE COM 880770102 75,227 -18,156 -19.44 4,075 -36.01 0.1706
2020-02-10 2019-12-31 13F TERADYNE COM 880770102 93,383 11,612 14.20 6,368 34.49 0.0980
2019-11-14 2019-09-30 13F TERADYNE COM 880770102 81,771 -56,549 -40.88 4,735 -28.55 0.0740
2019-08-09 2019-06-30 13F TERADYNE COM 880770102 138,320 281 0.20 6,627 20.51 0.1165
2019-05-15 2019-03-31 13F TERADYNE COM 880770102 138,039 13,095 10.48 5,499 40.24 0.0885
2019-02-11 2018-12-31 13F TERADYNE COM 880770102 124,944 -9,017 -6.73 3,921 -20.85 0.0855
2018-11-09 2018-09-30 13F TERADYNE COM 880770102 133,961 -72,640 -35.16 4,954 -37.01 0.0768
2018-08-14 2018-06-30 13F TERADYNE COM 880770102 206,601 -10,098 -4.66 7,865 -20.60 0.1175
2018-05-15 2018-03-31 13F TERADYNE COM 880770102 216,699 42,418 24.34 9,905 35.74 0.1468
2018-02-14 2017-12-31 13F TERADYNE COM 880770102 174,281 68,786 65.20 7,297 85.49 0.1261
2017-11-13 2017-09-30 13F TERADYNE COM 880770102 105,495 11,547 12.29 3,934 39.45 0.0882
2017-08-11 2017-06-30 13F TERADYNE COM 880770102 93,948 31,159 49.62 2,821 44.44 0.0810
2017-05-11 2017-03-31 13F TERADYNE COM 880770102 62,789 62,789 1,953 0.0430
2016-11-14 2016-09-30 13F TERADYNE COM 880770102 0 -28,839 -100.00 0 -100.00
2016-08-09 2016-06-30 13F TERADYNE COM 880770102 28,839 10,561 57.78 568 43.80 0.0384
2016-05-12 2016-03-31 13F TERADYNE COM 880770102 18,278 18,278 0.00 395 0.0215
2016-02-12 2015-12-31 13F TERADYNE COM 880770102 0 -20,974 -100.00 0 -100.00
2015-11-12 2015-09-30 13F TERADYNE COM 880770102 20,974 -70,396 -77.04 378 -78.56 0.0299
2015-08-12 2015-06-30 13F TERADYNE COM 880770102 91,370 76,921 532.36 1,763 548.16 0.1184
2015-05-14 2015-03-31 13F TERADYNE COM 880770102 14,449 -8,294 -36.47 272 -39.56 0.0205
2015-02-13 2014-12-31 13F TERADYNE COM 880770102 22,743 22,743 0.00 450 0.1021
2014-11-14 2014-09-30 13F TERADYNE COM 880770102 0 -22,995 -100.00 0 -100.00
2014-08-13 2014-06-30 13F TERADYNE COM 880770102 22,995 22,995 451 0.0868
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.