Ticker · CUSIP 45828L108

IAS

INTEGRAL AD SCIENCE HLDNG CO
Communication Services·Advertising Agencies
···Share
Holders (tracked)
7
Combined shares
2,610,279
Combined value
$26.55M
Last close
$10.34
Quarter
2025Q3
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
7122023Q42025Q3
Price is +1.7% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

14 events
  1. T. Rowe Price exited2026-02-17
    −39,935 shares · 2025Q4
    Position
  2. Izzy Englander (Millennium Mgmt) exited2026-02-17
    −333,892 shares · 2025Q4
    Position
  3. Ken Griffin (Citadel Advisors) exited2026-02-17
    −24,900 shares · 2025Q4
    Position
  4. Two Sigma Investments exited2026-02-17
    −59,664 shares · 2025Q4
    Position
  5. AQR Capital Management exited2026-02-17
    −151,888 shares · 2025Q4
    Position
  6. George Soros (Soros Fund Mgmt) exited2026-02-13
    −1,990,000 shares · 2025Q4
    Position
  7. Mario Gabelli (GAMCO) exited2026-02-05
    −10,000 shares · 2025Q4
    Position
  8. AQR Capital Management added2025-11-14
    +57,803 shares · 2025Q3
    Position
  9. Izzy Englander (Millennium Mgmt) opened position2025-11-14
    +333,892 shares · 2025Q3
    Position
  10. Two Sigma Investments trimmed2025-11-14
    −59,836 shares · 2025Q3
    Position
  11. T. Rowe Price added2025-11-14
    +2,543 shares · 2025Q3
    Position
  12. George Soros (Soros Fund Mgmt) opened position2025-11-14
    +1,990,000 shares · 2025Q3
    Position
  13. Renaissance Technologies exited2025-11-13
    −232,300 shares · 2025Q3
    Position
  14. Mario Gabelli (GAMCO) opened position2025-11-12
    +10,000 shares · 2025Q3
    Position

Insider activity

No insider transactions in the last 30 days.
View full insider history for IAS →
Follow-the-investor returns
If you'd copied each holder of IAS…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
Ken Griffin (Citadel Advisors)2021Q2$8.27+25.1%$257K
Izzy Englander (Millennium Mgmt)2021Q2$8.96+15.4%$3.5M
AQR Capital Management2023Q2$9.73+6.3%$1.6M
George Soros (Soros Fund Mgmt)2025Q3$10.17+1.7%$20.6M
Mario Gabelli (GAMCO)2025Q3$10.17+1.7%$103K
T. Rowe Price2021Q2$12.39-16.5%$413K
Two Sigma Investments2022Q1$14.93-30.8%$617K

Who moved on this name in 2025Q3

Position changes reported for the latest quarter, grouped by direction.
New positions3
Added to2
Trimmed1
Exited1

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2021Q4
5
$33.9M
2022Q1
7
$94.1M
2022Q2
7
$66.0M
2022Q3
8
$40.5M
2022Q4
9
$44.6M
2023Q1
10
$70.1M
2023Q2
13
$129.5M
2023Q3
13
$85.8M
2023Q4
12
$177.4M
2024Q1
11
$81.4M
2024Q2
9
$89.3M
2024Q3
7
$16.7M
2024Q4
7
$11.3M
2025Q1
8
$9.2M
2025Q2
6
$4.6M
2025Q3
7
$26.5M

Who owns IAS

7 super-investors · 2025Q3
Tracked stake
2.61M
shares
Combined value
$27M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added2Trim1Held1
#ManagerSharesValue
1George Soros
Soros Fund Mgmt
1.99M$20M
2Izzy Englander
Millennium Mgmt
333.9K$3M
3AQR Capital Management151.9K$2M
4Two Sigma Investments59.7K$607K
5T. Rowe Price39.9K$407K
6Ken Griffin
Citadel Advisors
24.9K$253K
7Mario Gabelli
GAMCO
10.0K$102K

Recent moves

20 transactions
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