13F reference period
n/a
Security Snapshot
INTEGRAL AD SCIENCE HOLDING CORP. - Common Stock, $0.001 par value per share (IAS) Institutional Ownership
CUSIP: 45828L108
13F Institutional Holders and Ownership History from Q2 2021 to Q2 2026
Institutions Reporting
Shares (Excl. Options)
n/a
Price
$10.00
The headline uses the Q3 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended.
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- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- IAS
- Shares outstanding
- 167,832,380
- SEC-reported price per share
- $10.00
- Insider filing price
- $10.00
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- IAS - INTEGRAL AD SCIENCE HOLDING CORP. - Common Stock, $0.001 par value per share is tracked under CUSIP 45828L108.
- 13F reference-period holder data is not available.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder data for the Q3 2026 reference period is not available.
- Available periods remain in the history table; they do not substitute for the headline period.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Schedule 13D/G
Open SEC evidence
Ownership context comes from Schedule 13D/G and available holder history for this CUSIP.
Security key
45828L108
13F reference period
n/a
13F holders
13D/G owners
2
CIK / CUSIP context first
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 45828L108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
IAS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Sunriver Management LLC | 4.3% | -20% | $72,411,997 | -$17,317,039 | 7,120,157 | -19% | SUNRIVER MANAGEMENT LLC | 30 Sep 2025 |
| GLAZER CAPITAL, LLC | 4.2% | -36% | $71,006,577 | -$36,818,209 | 6,981,827 | -34% | Glazer Capital, LLC | 31 Dec 2025 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
21
Headline period
n/a
Rows shown
1-21 of 21
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 1 | $10 | $10.00 | 1 | |
| 2026 Q1 | 1 | $10 | -$3,402 | $10.00 | 1 |
| 2025 Q4 | 330 | $3,412 | -$1,650,626,290 | $10.17 | 2 |
| 2025 Q3 | 162,237,804 | $1,649,958,851 | +$38,465,309 | $10.17 | 169 |
| 2025 Q2 | 161,302,415 | $1,340,413,879 | +$21,177,283 | $8.31 | 167 |
| 2025 Q1 | 158,913,957 | $1,280,907,870 | +$6,183,963 | $8.06 | 183 |
| 2024 Q4 | 157,013,768 | $1,639,233,773 | +$10,942,383 | $10.44 | 162 |
| 2024 Q3 | 155,253,832 | $1,678,301,051 | -$7,490,949 | $10.81 | 168 |
| 2024 Q2 | 156,540,646 | $1,521,575,056 | +$48,941,489 | $9.72 | 153 |
| 2024 Q1 | 151,179,932 | $1,507,267,904 | -$34,001,193 | $9.97 | 164 |
| 2023 Q4 | 152,051,602 | $2,188,098,209 | +$24,773,185 | $14.39 | 173 |
| 2023 Q3 | 150,627,018 | $1,790,970,912 | -$13,700,552 | $11.89 | 163 |
| 2023 Q2 | 150,627,248 | $2,708,276,328 | +$18,710,371 | $17.98 | 167 |
| 2023 Q1 | 149,864,180 | $2,138,488,934 | +$29,872,291 | $14.27 | 114 |
| 2022 Q4 | 148,104,635 | $1,301,853,690 | -$3,576,426 | $8.79 | 105 |
| 2022 Q3 | 148,973,800 | $1,079,153,266 | -$28,475,728 | $7.24 | 96 |
| 2022 Q2 | 149,824,703 | $1,487,805,317 | +$6,990,414 | $9.93 | 87 |
| 2022 Q1 | 148,720,656 | $2,053,137,371 | -$74,182,167 | $13.80 | 87 |
| 2021 Q4 | 153,375,601 | $3,406,359,912 | +$45,043,910 | $22.21 | 78 |
| 2021 Q3 | 145,093,409 | $2,993,365,044 | +$23,018,213 | $20.63 | 69 |
| 2021 Q2 | 143,921,089 | $2,961,335,000 | +$2,961,335,000 | $20.58 | 70 |