X0609 4 2026-09-15 0 0000816761 TERADATA CORP /DE/ TDC 0001719723 MCMILLAN STEPHEN false C/O TERADATA CORPORATION 17095 VIA DEL CAMPO SAN DIEGO CA 92127 1 1 0 0 President and CEO 1 Common Stock 2026-09-15 4 S 0 10000 30.017 D 752446 D Sale of shares pursuant to Rule 10b5-1 trading plan adopted by the Reporting Person on May 18, 2026. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.00 to $30.05. The reporting person has provided to the issuer and will provide any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. /s/ Irving Gomez, Attorney-in-fact for Stephen McMillan 2026-09-17