INTEGRAL AD SCIENCE HLDNG CO IAS

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($881.8k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $17.98. Options: 3 managers hold calls ($321.8k notional), 4 hold puts ($310.7k).

Trends to Q2 2023

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

No one currently above 5% in the filings since 19 Dec 2024.

Fell to 5% or below in the last year: GLAZER CAPITAL, LLC (4.2%, 2026-02-12), Vista Equity Partners Fund VI, L.P. (0.0%, 2025-12-29), Atlas Venture Fund VIII, L.P. (0.0%, 2025-12-23)

Holders, Q2 2023