X0508 4 2024-03-08 0001842718 INTEGRAL AD SCIENCE HOLDING CORP. IAS 0001955607 SECOR TANIA C/O INTEGRAL AD SCIENCE HOLDING CORP. 12 E. 49TH STREET, 20TH FLOOR NEW YORK NY 10017 false true false false Chief Financial Officer false Common Stock, $0.001 par value 2024-03-08 4 S false 8929 9.71 D 221959 D Mandatory sale to cover tax liability associated with the vesting and settlement of market stock units. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $9.63 to $9.76 per share. The reporting person undertakes to provide to Integral Ad Science Holding Corp., any security holder of Integral Ad Science Holding Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. Exhibit 24 - Power of Attorney /s/ Yossi Almani, by Power of Attorney 2024-03-11