Integral Ad Science HoldingIAS
13F holders, Q3 2025 (September 30)171holders +1
47new positions
44sold out
5famous investors
$10.17avg. 13F price*
At the end of Q3 2025, 171 institutions reported holding Integral Ad Science Holding (IAS) in their 13F filings, up 1 from Q2 2025. 47 opened new positions and 44 sold out. The largest holders were Vista Equity Partners Management, LLC ($661.2M), Atlas Venture Advisors, Inc. ($231.1M) and Vanguard Group Inc. ($92.0M). 5 famous investors held it, including George Soros (0.5% of Soros Fund Management's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Integral Ad Science Holding
- CUSIP
- 45828L108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 47 | $196.1M |
| Exits | 44 | $124.8M |
All 13F filers, Q2 2025 → Q3 2025: 25,903,866 shares bought and 24,895,878 shares sold, net +1,007,988 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 171 holders
| Vista Equity Partners Management, LLC | 55.63% | No change | 65,010,001 | $661.2M |
| Atlas Venture Advisors, Inc. | 52.79% | No change | 22,722,770 | $231.1M |
| Vanguard Group Inc. | 0.00% | Reduce -2.3% | 9,043,380 | $92.0M |
| Sunriver Management LLC | 7.87% | Reduce -19.3% | 7,120,157 | $72.4M |
| BlackRock, Inc. | 0.00% | Add +1.3% | 6,757,261 | $68.7M |
| Dimensional Fund Advisors LP | 0.01% | Add +10.0% | 5,949,164 | $60.5M |
| P2 Capital Partners, LLC | 10.09% | Reduce -1.6% | 4,830,805 | $49.1M |
| KRYGER CAPITAL Ltd | 3.52% | New | 3,000,000 | $30.5M |
| Nexpoint Asset Management, L.P. | 2.45% | New | 2,683,061 | $27.3M |
| Glazer Capital, LLC | 0.79% | New | 2,096,797 | $21.3M |
| First Trust Capital Management L.P. | 1.37% | New | 2,088,796 | $21.2M |
| Soros Fund Management | 0.46% | New | 1,990,000 | $20.2M |
| Geode Capital Management, LLC | 0.00% | Add +2.5% | 1,964,293 | $20.0M |
| Verition Fund Management LLC | 0.12% | Add +1663.2% | 1,948,970 | $19.8M |
| State Street Corp. | 0.00% | Add +2.1% | 1,643,118 | $16.7M |
| Bank of America Corp. | 0.00% | Add +118.2% | 1,394,507 | $14.2M |
| Nuveen, LLC | 0.00% | Reduce -26.2% | 1,369,706 | $13.9M |
| Balyasny Asset Management L.P. | 0.02% | New | 1,166,530 | $11.9M |
| Water Island Capital LLC | 1.70% | New | 1,071,160 | $10.9M |
| Polar Asset Management Partners Inc. | 0.30% | New | 1,000,000 | $10.2M |
| AQR Arbitrage LLC | 0.36% | New | 991,705 | $10.1M |
| Northern Trust Corp. | 0.00% | Reduce -0.7% | 805,536 | $8.2M |
| Dana Investment Advisors, Inc. | 0.24% | Add +611.4% | 793,740 | $8.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +139.6% | 767,555 | $7.8M |
| Ararat Capital Management LP | 3.64% | Reduce -69.0% | 668,407 | $6.8M |
| Alpine Associates Management Inc. | 0.40% | New | 641,140 | $6.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +3.5% | 637,495 | $6.5M |
| Pacer Advisors, Inc. | 0.02% | New | 582,510 | $5.9M |
| UBS Group AG | 0.00% | Add +88.5% | 574,116 | $5.8M |
| CenterBook Partners LP | 0.27% | Reduce -68.8% | 536,066 | $5.5M |
| Qube Research & Technologies Ltd | 0.01% | Add +183.9% | 521,420 | $5.3M |
| Morgan Stanley | 0.00% | Reduce -11.4% | 491,740 | $5.0M |
| Barclays PLC | 0.00% | Add +49.8% | 477,908 | $4.9M |
| Monimus Capital Management, LP | 3.51% | Reduce -30.3% | 464,110 | $4.7M |
| Circumference Group LLC | 5.37% | Add +28.6% | 450,000 | $4.6M |
| Clearline Capital LP | 0.37% | Reduce -18.6% | 419,221 | $4.3M |
| Gabelli Funds LLC | 0.03% | New | 383,797 | $3.9M |
| Susquehanna International Group, LLP | 0.01% | Add +100.8% | 375,113 | $3.8M |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 0.57% | New | 350,600 | $3.6M |
| Aberdeen Group plc | 0.01% | Reduce -81.0% | 335,915 | $3.4M |
| Millennium Management | 0.00% | New | 333,892 | $3.4M |
| Bank of New York Mellon Corp | 0.00% | Add +1.7% | 297,019 | $3.0M |
| SG Americas Securities, LLC | 0.01% | Add +680.0% | 273,467 | $2.8M |
| Carmignac Gestion | 0.04% | New | 266,001 | $2.7M |
| Alliancebernstein L.P. | 0.00% | Add +236.8% | 257,920 | $2.6M |
| JPMorgan Chase & Co. | 0.00% | Add +209.4% | 244,469 | $2.5M |
| Rice Hall James & Associates, LLC | 0.11% | Reduce -32.1% | 199,103 | $2.0M |
| American Century Companies Inc. | 0.00% | Add +31.3% | 173,871 | $1.8M |
| Jane Street Group, LLC | 0.00% | Add +193.1% | 160,128 | $1.6M |
| Invesco Ltd. | 0.00% | Add +20.8% | 159,611 | $1.6M |
| Swiss National Bank | 0.00% | No change | 158,700 | $1.6M |
| AQR Capital Management | 0.00% | Add +61.4% | 151,888 | $1.5M |
| Victory Capital Management Inc. | 0.00% | Reduce -3.8% | 147,573 | $1.5M |
| First Trust Advisors LP | 0.00% | Add +107.6% | 146,573 | $1.5M |
| Susquehanna Portfolio Strategies, LLC | 0.02% | Add +50.2% | 114,124 | $1.2M |
| Rhumbline Advisers | 0.00% | Reduce -25.9% | 107,551 | $1.1M |
| Janney Montgomery Scott LLC | 0.00% | Add +0.8% | 101,960 | $1.0M |
| Quinn Opportunity Partners LLC | 0.07% | Reduce -61.5% | 100,000 | $1.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -50.6% | 96,703 | $983K |
| Ameriprise Financial Inc. | 0.00% | Reduce -92.9% | 89,214 | $907K |
| Legal & General Group Plc | 0.00% | No change | 88,135 | $896K |
| OP Asset Management Ltd | 0.01% | Reduce -21.8% | 83,815 | $852K |
| Factor Wealth Management LTD | 0.20% | Reduce -19.3% | 78,540 | $799K |
| HSBC Holdings PLC | 0.00% | Reduce -19.6% | 78,117 | $795K |
| Envestnet Asset Management Inc. | 0.00% | Add +3.9% | 75,705 | $770K |
| California State Teachers Retirement System | 0.00% | Add +0.0% | 74,877 | $761K |
| Deutsche Bank AG | 0.00% | Reduce -85.3% | 72,477 | $737K |
| Canada Pension Plan Investment Board | 0.00% | No change | 72,000 | $732K |
| Morningstar Investment Management LLC | 0.03% | New | 71,712 | $729K |
| Wells Fargo & Company | 0.00% | Add +4.7% | 70,410 | $716K |
| State of Wisconsin Investment Board | 0.00% | No change | 69,672 | $709K |
| Danske Bank A/S | 0.00% | New | 66,810 | $679K |
| Grizzlyrock Capital, LLC | 0.48% | Reduce -88.3% | 61,250 | $623K |
| CastleKnight Management LP | 0.03% | Add +200.0% | 60,300 | $613K |
| Two Sigma Investments, LP | 0.00% | Reduce -50.1% | 59,664 | $607K |
| Principal Financial Group Inc. | 0.00% | Reduce -15.2% | 54,443 | $554K |
| Alps Advisors Inc. | 0.00% | Add +33.1% | 54,280 | $552K |
| Fifth Lane Capital, LP | 0.52% | New | 50,000 | $509K |
| LSV Asset Management | 0.00% | New | 48,500 | $493K |
| Walleye Capital LLC | 0.00% | New | 48,127 | $489K |
| OMERS ADMINISTRATION Corp | 0.00% | New | 47,800 | $486K |
| Blue Trust, Inc. | 0.01% | Add +3.7% | 45,461 | $462K |
| MetLife Investment Management, LLC | 0.00% | No change | 44,048 | $448K |
| Wolverine Asset Management LLC | 0.03% | New | 43,393 | $441K |
| Virtu Financial LLC | 0.02% | New | 42,274 | $430K |
| ProShare Advisors LLC | 0.00% | Add +160.9% | 40,786 | $415K |
| AlphaQuest LLC | 0.03% | Reduce -38.9% | 40,513 | $412K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -3.9% | 40,047 | $407K |
| T. Rowe Price Associates Inc. | 0.00% | Add +6.8% | 39,935 | $407K |
| Prelude Capital Management, LLC | 0.03% | Add +41.8% | 39,985 | $407K |
| Jain Global LLC | 0.01% | New | 36,500 | $371K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -15.3% | 35,795 | $364K |
| Intech Investment Management LLC | 0.00% | Reduce -32.0% | 35,560 | $362K |
| Teacher Retirement System of Texas | 0.00% | Add +156.3% | 34,919 | $355K |
| Janus Henderson Group PLC | 0.00% | No change | 34,000 | $346K |
| Royal Bank of Canada | 0.00% | Reduce -69.8% | 33,858 | $344K |
| LPL Financial LLC | 0.00% | Add +10.9% | 30,135 | $306K |
| Sei Investments Co. | 0.00% | Reduce -46.8% | 29,344 | $298K |
| BNP Paribas Financial Markets | 0.00% | Reduce -16.4% | 27,716 | $282K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.00% | New | 25,000 | $254K |
"% of holder's portfolio" is IAS's weight in each manager's 13F, not the share of Integral Ad Science Holding the manager owns.