Teradyne, Inc.
MX ˙ BMV ˙ US8807701029
SecurityMX:TER / Teradyne, Inc.
InstitutionCustom Index Systems, Llc
Latest Disclosed Ownership2,491 shares
Latest Disclosed Value $ 738,482
Custom Index Systems, Llc reports 5.15% increase in ownership of TER / Teradyne, Inc.

On May 1, 2026 - Custom Index Systems, Llc filed a 13F-HR/A form disclosing ownership of 2,491 shares of Teradyne, Inc. (MX:TER) valued at $738,482 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,369 shares of Teradyne, Inc.. This represents a change in shares of 5.15% 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)
2026-05-01 2026-03-31 13F/A-1 TERADYNE COM 880770102 2,491 122 5.15 738 61.14 0.3217
2026-04-29 2026-03-31 13F TERADYNE COM 880770102 2,491 122 738 0.3211
2026-02-12 2025-12-31 13F TERADYNE COM 880770102 2,369 -2,076 -46.70 459 -25.04 0.2025
2025-10-29 2025-09-30 13F TERADYNE COM 880770102 4,445 1,407 46.31 612 123.81 0.1818
2025-08-13 2025-06-30 13F TERADYNE COM 880770102 3,038 292 10.63 273 20.80 0.1303
2025-05-14 2025-03-31 13F TERADYNE COM 880770102 2,746 -509 -15.64 227 -44.74 0.1150
2025-01-23 2024-12-31 13F TERADYNE COM 880770102 3,255 173 5.61 410 -0.73 0.2200
2024-10-24 2024-09-30 13F TERADYNE COM 880770102 3,082 3,082 413 0.2236
2024-08-06 2024-06-30 13F TERADYNE COM 880770102 0 -3,235 -100.00 0 -100.00
2024-05-14 2024-03-31 13F TERADYNE COM 880770102 3,235 -631 -16.32 365 -12.89 0.2076
2024-01-26 2023-12-31 13F TERADYNE COM 880770102 3,866 3,866 420 0.2585
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.