SCHEDULE 13G/A

INTEGRAL AD SCIENCE HLDNG CO

Common Stock, $0.001 par value per share · CUSIP: 45828L108

Event date: 2025-12-23

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Vista Equity Partners Fund VI, L.P.

  Shares: 0 · Class: 0%

• Vista Equity Partners Fund VI-A, L.P.

  Shares: 0 · Class: 0%

• VEPF VI FAF, L.P.

  Shares: 0 · Class: 0%

• Vista Equity Partners Fund VI GP, L.P.

  Shares: 0 · Class: 0%

• VEPF VI GP. Ltd.

  Shares: 0 · Class: 0%

• VEPF Management, L.P.

  Shares: 0 · Class: 0%

• Vista Equity Partners Management, LLC

  Shares: 0 · Class: 0%

• VEP Group, LLC

  Shares: 0 · Class: 0%

• Robert F. Smith

  Shares: 0 · Class: 0%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.