Integral Ad Science HoldingIAS
13F holders, Q1 2025 (March 31)187holders +22
45new positions
26sold out
5famous investors
$8.06avg. 13F price*
At the end of Q1 2025, 187 institutions reported holding Integral Ad Science Holding (IAS) in their 13F filings, up 22 from Q4 2024. 45 opened new positions and 26 sold out. The largest holders were Vista Equity Partners Management, LLC ($524.0M), Atlas Venture Advisors, Inc. ($183.1M) and Vanguard Group Inc. ($73.3M). 5 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Integral Ad Science Holding
- CUSIP
- 45828L108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 45 | $48.8M |
| Exits | 26 | $61.6M |
All 13F filers, Q4 2024 → Q1 2025: 13,060,630 shares bought and 10,628,270 shares sold, net +2,432,360 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 187 holders
| Vista Equity Partners Management, LLC | 48.74% | No change | 65,010,001 | $524.0M |
| Atlas Venture Advisors, Inc. | 50.04% | No change | 22,722,770 | $183.1M |
| Vanguard Group Inc. | 0.00% | Add +0.5% | 9,090,229 | $73.3M |
| Sunriver Management LLC | 8.12% | Add +12.0% | 8,166,774 | $65.8M |
| BlackRock, Inc. | 0.00% | Reduce -0.6% | 6,004,070 | $48.4M |
| P2 Capital Partners, LLC | 7.53% | No change | 4,810,000 | $38.8M |
| Dimensional Fund Advisors LP | 0.01% | Add +17.1% | 4,439,747 | $35.8M |
| Rubric Capital Management LP | 0.46% | Add +60.4% | 3,166,949 | $25.5M |
| Corvex Management LP | 0.82% | New | 2,618,000 | $21.1M |
| Clearbridge Investments, LLC | 0.02% | Reduce -8.0% | 2,510,516 | $20.2M |
| Aberdeen Group plc | 0.03% | Add +12.7% | 1,994,980 | $16.1M |
| Geode Capital Management, LLC | 0.00% | Add +2.2% | 1,888,882 | $15.2M |
| TimesSquare Capital Management, LLC | 0.22% | Reduce -14.0% | 1,719,863 | $13.9M |
| Invenomic Capital Management LP | 0.68% | Add +84.3% | 1,649,983 | $13.3M |
| Ararat Capital Management LP | 6.27% | Reduce -30.3% | 1,589,834 | $12.8M |
| State Street Corp. | 0.00% | Reduce -1.7% | 1,562,732 | $12.6M |
| Jacobs Levy Equity Management, Inc. | 0.04% | Reduce -3.0% | 1,378,259 | $11.1M |
| Nuveen, LLC | 0.00% | — | 1,352,028 | $10.9M |
| Alta Fox Capital Management, LLC | 3.88% | Add +20832.0% | 1,214,053 | $9.8M |
| Frontier Capital Management Co. LLC | 0.09% | Reduce -3.0% | 967,456 | $7.8M |
| Cubist Systematic Strategies, LLC | 0.10% | New | 923,168 | $7.4M |
| Northern Trust Corp. | 0.00% | Add +1.8% | 689,174 | $5.6M |
| CenterBook Partners LP | 0.33% | Reduce -36.0% | 651,880 | $5.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -2.5% | 588,895 | $4.7M |
| Morgan Stanley | 0.00% | Add +1.4% | 585,569 | $4.7M |
| Bank of America Corp. | 0.00% | Add +56.9% | 532,437 | $4.3M |
| Deutsche Bank AG | 0.00% | Reduce -1.1% | 525,696 | $4.2M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | Add +23.8% | 496,400 | $4.0M |
| Monimus Capital Management, LP | 3.33% | Add +151.9% | 487,371 | $3.9M |
| Renaissance Technologies | 0.01% | Add +112.0% | 440,000 | $3.5M |
| Millennium Management | 0.00% | Add +534.4% | 406,770 | $3.3M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -11.3% | 389,093 | $3.1M |
| Qube Research & Technologies Ltd | 0.00% | Add +187.2% | 310,032 | $2.5M |
| Bank of New York Mellon Corp | 0.00% | Add +15.9% | 291,079 | $2.3M |
| Janus Henderson Group PLC | 0.00% | Reduce -0.5% | 241,285 | $2.0M |
| ExodusPoint Capital Management, LP | 0.03% | New | 246,590 | $2.0M |
| Jane Street Group, LLC | 0.00% | New | 246,429 | $2.0M |
| Rice Hall James & Associates, LLC | 0.11% | Reduce -25.1% | 235,212 | $1.9M |
| PDT Partners, LLC | 0.13% | Add +13.3% | 228,977 | $1.8M |
| Jefferies Financial Group Inc. | 0.03% | New | 225,000 | $1.8M |
| Circumference Group LLC | 2.10% | Add +10.5% | 210,000 | $1.7M |
| one8zero8, LLC | 0.36% | Add +14.7% | 187,050 | $1.5M |
| Susquehanna International Group, LLP | 0.00% | Add +97.1% | 173,365 | $1.4M |
| Atom Investors LP | 0.17% | Reduce -47.2% | 167,575 | $1.4M |
| Quinn Opportunity Partners LLC | 0.09% | Add +106.3% | 165,000 | $1.3M |
| Swiss National Bank | 0.00% | No change | 158,700 | $1.3M |
| Inflection Point Investments LLP | 2.75% | New | 156,899 | $1.3M |
| UBS Group AG | 0.00% | Reduce -54.6% | 155,330 | $1.3M |
| Verition Fund Management LLC | 0.01% | New | 152,563 | $1.2M |
| Citadel Advisors | 0.00% | Reduce -80.6% | 136,883 | $1.1M |
| Schonfeld Strategic Advisors LLC | 0.01% | Reduce -27.6% | 134,922 | $1.1M |
| Barclays PLC | 0.00% | Reduce -5.5% | 134,386 | $1.1M |
| Essex Investment Management Co. LLC | 0.22% | Reduce -0.7% | 128,408 | $1.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -22.8% | 119,700 | $965K |
| First Trust Advisors LP | 0.00% | Reduce -32.2% | 116,259 | $937K |
| Marshall Wace, LLP | 0.00% | New | 115,127 | $928K |
| Magnetar Financial LLC | 0.01% | New | 107,327 | $865K |
| Dana Investment Advisors, Inc. | 0.03% | New | 106,944 | $862K |
| Rhumbline Advisers | 0.00% | Reduce -5.4% | 101,663 | $819K |
| Jump Financial, LLC | 0.01% | New | 100,070 | $807K |
| Invesco Ltd. | 0.00% | Add +97.7% | 99,932 | $805K |
| Tejara Capital Ltd | 0.40% | Add +66.4% | 99,854 | $805K |
| Washington Harbour Partners LP | 2.24% | New | 97,300 | $784K |
| Ameriprise Financial Inc. | 0.00% | Reduce -91.2% | 96,829 | $780K |
| Semanteon Capital Management, LP | 0.41% | New | 94,662 | $763K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -1.8% | 92,428 | $745K |
| Legal & General Group Plc | 0.00% | Add +5.8% | 88,747 | $715K |
| American Century Companies Inc. | 0.00% | New | 88,256 | $711K |
| Envestnet Asset Management Inc. | 0.00% | Add +165.6% | 84,471 | $681K |
| Intech Investment Management LLC | 0.01% | Add +69.9% | 83,988 | $677K |
| 272 Capital LP | 1.79% | Reduce -63.4% | 83,930 | $676K |
| OP Asset Management Ltd | 0.01% | — | 81,651 | $658K |
| Fox Run Management, L.L.C. | 0.10% | New | 79,423 | $640K |
| Alliancebernstein L.P. | 0.00% | No change | 76,580 | $617K |
| Jennison Associates LLC | 0.00% | Add +20.2% | 76,373 | $616K |
| Point72 Asset Management | 0.00% | New | 76,155 | $614K |
| California State Teachers Retirement System | 0.00% | No change | 74,874 | $603K |
| Gsa Capital Partners LLP | 0.05% | New | 74,787 | $603K |
| Factor Wealth Management LTD | 0.18% | Reduce -25.1% | 74,404 | $600K |
| Canada Pension Plan Investment Board | 0.00% | No change | 72,000 | $580K |
| Raymond James Financial Inc. | 0.00% | Reduce -11.8% | 68,173 | $549K |
| JPMorgan Chase & Co. | 0.00% | Reduce -74.5% | 67,879 | $547K |
| Wells Fargo & Company | 0.00% | Reduce -24.3% | 64,406 | $519K |
| Versor Investments LP | 0.08% | Add +374.6% | 63,600 | $513K |
| Citigroup Inc. | 0.00% | Reduce -7.1% | 61,803 | $498K |
| Bayesian Capital Management, LP | 0.08% | New | 58,100 | $468K |
| Susquehanna Fundamental Investments, LLC | 0.01% | New | 58,002 | $467K |
| Royal Bank of Canada | 0.00% | Add +219.6% | 55,941 | $451K |
| Bank of Montreal | 0.00% | New | 51,760 | $417K |
| Repertoire Partners LP | 2.58% | Reduce -82.7% | 49,301 | $397K |
| Quantbot Technologies LP | 0.01% | New | 47,687 | $384K |
| Voya Investment Management LLC | 0.00% | Add +22.7% | 47,281 | $381K |
| State Board of Administration of Florida Retirement System | 0.00% | Reduce -45.4% | 45,324 | $365K |
| MetLife Investment Management, LLC | 0.00% | Reduce -1.9% | 44,048 | $355K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.3% | 43,326 | $349K |
| Engineers Gate Manager LP | 0.01% | New | 41,605 | $335K |
| AQR Capital Management | 0.00% | Reduce -23.9% | 40,689 | $328K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +10.5% | 40,483 | $326K |
| Alps Advisors Inc. | 0.00% | New | 39,190 | $316K |
| Legato Capital Management LLC | 0.04% | Reduce -1.3% | 38,239 | $308K |
"% of holder's portfolio" is IAS's weight in each manager's 13F, not the share of Integral Ad Science Holding the manager owns.