Source: Teradyne Form 10-Q and 10-K inventories and cost of revenues (XBRL company facts, https://data.sec.gov/api/xbrl/companyfacts/CIK0000097210.json); every period is period-end inventory x 90 / the quarter's cost of revenues, with Q4 as the fiscal year less the nine months. Q4 2022 to Q2 2025 were recomputed on 2026-10-28; the earlier values (from Financial Modeling Prep key-metrics) were about 2.5 times too high on this basis, for example Q2 2025 was 232.6 against 113.2 (inventory $350.505 million x 90 / cost of revenues $278.785 million). Q1 2023 (121.3) was missing and is added. Q4 2025 is 73.7 (inventory $379.552 million x 90 / cost of revenues $463.647 million, which is FY2025 $1,332.679 million minus the nine-month $869.032 million, Form 10-K year ended 31 December 2025). Q3 2026 is 96.8: inventory $574.992 million x 90 / cost of revenues $534.674 million, from the Teradyne Q3 2026 earnings release Exhibit 99.1, https://www.sec.gov/Archives/edgar/data/97210/000119312526434981/ter-ex99_1.htm.

Source: Teradyne deferred revenue and customer advances note (thousands converted to millions). 31 December 2024 and 31 December 2025: Form 10-K year ended 31 December 2025, https://www.sec.gov/Archives/edgar/data/97210/000119312526059002/ter-20251231.htm. 28 September 2025: Form 10-Q ended 28 September 2025, https://www.sec.gov/Archives/edgar/data/97210/000119312525258477/ter-20250928.htm. 27 September 2026: Form 10-Q ended 27 September 2026 (accession 0001193125-26-441091), total $270.025 million (maintenance $56.853 million, customer advances and undelivered $133.586 million, extended warranty $79.586 million), current plus long-term, https://www.sec.gov/Archives/edgar/data/97210/000119312526441091/ter-20260927.htm. 29 March 2026: Form 10-Q ended 29 March 2026, https://www.sec.gov/Archives/edgar/data/97210/000119312526201058/ter-20260329.htm. 28 June 2026: Form 10-Q ended 28 June 2026, total $256.825 million (maintenance $60.663 million, customer advances and undelivered $118.038 million, extended warranty $78.124 million), https://www.sec.gov/Archives/edgar/data/97210/000119312526327715/ter-20260628.htm.

Source: Teradyne Form 10-Q and Form 10-K segment tables (thousands converted to millions). Q2 2026 and Q2 2025: Form 10-Q ended 28 June 2026, accession 0001193125-26-327715, https://www.sec.gov/Archives/edgar/data/97210/000119312526327715/ter-20260628.htm. Q1 2026 and Q1 2025: Form 10-Q ended 29 March 2026, accession 0001193125-26-201058, https://www.sec.gov/Archives/edgar/data/97210/000119312526201058/ter-20260329.htm. Q3 2025: Form 10-Q ended 28 September 2025, accession 0001193125-25-258477, https://www.sec.gov/Archives/edgar/data/97210/000119312525258477/ter-20250928.htm. Q4 2025 is FY2025 Form 10-K segment revenue (Semiconductor Test $2,523.7 million, Product Test $358.0 million, Robotics $308.3 million) minus nine-month 10-Q totals, accession 0001193125-26-059002, https://www.sec.gov/Archives/edgar/data/97210/000119312526059002/ter-20251231.htm. Exhibit 99.1 for Q2 2026 rounded the same quarter to $1,122 / $100 / $107 million: https://www.sec.gov/Archives/edgar/data/97210/000119312526321933/ter-ex99_1.htm. Q3 2026: Teradyne Q3 2026 earnings release Exhibit 99.1 (Form 8-K filed 28 October 2026), https://www.sec.gov/Archives/edgar/data/97210/000119312526434981/ter-ex99_1.htm. The release prints whole millions; the Form 10-Q for the quarter ended 27 September 2026 was not filed at the time of writing.

Source: Teradyne Form 10-Q and Form 10-K Note E / revenue disaggregation (thousands converted to millions). Q3 2026 and Q3 2025: Form 10-Q ended 27 September 2026 (accession 0001193125-26-441091), three-month columns, https://www.sec.gov/Archives/edgar/data/97210/000119312526441091/ter-20260927.htm. Q2 2026 and Q2 2025: Form 10-Q ended 28 June 2026, https://www.sec.gov/Archives/edgar/data/97210/000119312526327715/ter-20260628.htm. Q1 2026 and Q1 2025: Form 10-Q ended 29 March 2026, https://www.sec.gov/Archives/edgar/data/97210/000119312526201058/ter-20260329.htm. Q3 2025 and nine months 2025: Form 10-Q ended 28 September 2025, https://www.sec.gov/Archives/edgar/data/97210/000119312525258477/ter-20250928.htm. FY2025: Form 10-K year ended 31 December 2025, SoC $1,889.685 million, Memory $504.903 million, IST $129.156 million, https://www.sec.gov/Archives/edgar/data/97210/000119312526059002/ter-20251231.htm. Q2 2026 earnings call (29 July 2026) rounded the same quarter to SoC $843 million, memory $212 million, IST $67 million.