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Integral Ad Science Holding Corp. (IAS) institutional ownership

Market cap$1.7B SectorCommunication Services
Funds holding · Q1 2026
1
reported IAS position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
0 buyers · 1 sellers

Integral Ad Science Holding Corp. (IAS) price and institutional activity

Dates

Q1 2026

$0 bought by 0 investors
$0 sold by 1 investors
Ifp Advisors, Inc
Bought Sold Totals per quarter; hover a bar for the names.

Integral Ad Science Holding Corp. (IAS) institutional activity · 1

Investor Type Est. change Change Δ Own Date
Ifp Advisors, Inc · Exited
Change −329 Δ Own −100.0% Date Q1 2026
Ifp Advisors, Inc Exited· Q1 2026 −329 −100.0% Q1 2026
Data through Q1 2026 · filed May 15, 2026
1 of 1

Famous investor activity in Integral Ad Science Holding Corp. (IAS)

Integral Ad Science Holding Corp. (IAS) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Vepf Management, L.P. · 10% Owner Other Form 4 events -$670M
Price $10.30 Qty -65.0M Owned 0 Trade date Dec 23, 2025 Filed date Dec 29, 2025
Vepf Management, L.P. 10% Owner Other Form 4 events $10.30 -65.0M -$670M 0 Dec 23, 2025 Dec 29, 2025
Atlas Venture Associates Viii, Inc. · 10% Owner Other Form 4 events -$234M
Price $10.30 Qty -22.7M Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Atlas Venture Associates Viii, Inc. 10% Owner Other Form 4 events $10.30 -22.7M -$234M 0 Dec 23, 2025 Dec 23, 2025
Lord Robert · Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -$301K
Price $10.30 Qty -29K Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Lord Robert Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale $10.30 -29K -$301K 0 Dec 23, 2025 Dec 23, 2025
Wegner Alpana · Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -$5.4M
Price $10.30 Qty -525K Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Wegner Alpana Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale $10.30 -525K -$5.4M 0 Dec 23, 2025 Dec 23, 2025
Putman Jill · Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -$1.4M
Price $10.30 Qty -132K Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Putman Jill Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale $10.30 -132K -$1.4M 0 Dec 23, 2025 Dec 23, 2025
Gil Alexis II · Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -$1.4M
Price $10.30 Qty -137K Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Gil Alexis II Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale $10.30 -137K -$1.4M 0 Dec 23, 2025 Dec 23, 2025
Utzschneider Lisa · Director, Officer 4 operations -1.6M
Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Utzschneider Lisa Director, Officer 4 operations -1.6M 0 Dec 23, 2025 Dec 23, 2025
Utzschneider Lisa · Director, Officer 2 operations -$13M
Price $4.13–$10.30 Qty -2.5M Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Utzschneider Lisa Director, Officer 2 operations $4.13–$10.30 -2.5M -$13M 0 Dec 23, 2025 Dec 23, 2025
Berkes Otto · Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -$830K
Price $10.30 Qty -81K Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Berkes Otto Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale $10.30 -81K -$830K 0 Dec 23, 2025 Dec 23, 2025
Heller Bridgette P. · Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -$645K
Price $10.30 Qty -63K Owned 0 Trade date Dec 23, 2025 Filed date Dec 23, 2025
Heller Bridgette P. Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale $10.30 -63K -$645K 0 Dec 23, 2025 Dec 23, 2025
Gil Alexis II · Officer Sell −$29K
Price $10.28 Qty −3K Owned 137K Trade date Dec 2, 2025 Filed date Dec 3, 2025
Gil Alexis II Officer Sell $10.28 −3K −$29K 137K Dec 2, 2025 Dec 3, 2025
Utzschneider Lisa · Director, Officer Sell −$125K
Price $10.24 Qty −12K Owned 418K Trade date Nov 5, 2025 Filed date Nov 6, 2025
Utzschneider Lisa Director, Officer Sell $10.24 −12K −$125K 418K Nov 5, 2025 Nov 6, 2025
Utzschneider Lisa · Director, Officer 2 operations 0
Owned 125K Trade date Nov 2, 2025 Filed date Nov 4, 2025
Utzschneider Lisa Director, Officer 2 operations 0 125K Nov 2, 2025 Nov 4, 2025
Utzschneider Lisa · Director, Officer Sell −$94K
Price $10.19 Qty −9K Owned 406K Trade date Oct 7, 2025 Filed date Oct 9, 2025
Utzschneider Lisa Director, Officer Sell $10.19 −9K −$94K 406K Oct 7, 2025 Oct 9, 2025
Gil Alexis II · Officer Sell −$36K
Price $10.18 Qty −4K Owned 140K Trade date Oct 3, 2025 Filed date Oct 7, 2025
Gil Alexis II Officer Sell $10.18 −4K −$36K 140K Oct 3, 2025 Oct 7, 2025
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15 of 23 Sign in to continue to older insider transactions.

Integral Ad Science Holding Corp. (IAS) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Atlas Venture Fund Viii, L.P. 22.7M
% of shares outstanding 14.8% Filing date Jan 31, 2023
Atlas Venture Fund Viii, L.P. 22.7M 14.8% Jan 31, 2023
Vanguard Group Inc 8.1M
% of shares outstanding 5.1% Filing date Feb 13, 2024
Vanguard Group Inc 8.1M 5.1% Feb 13, 2024
Glazer Capital, LLC 7.0M
% of shares outstanding 4.2% Filing date Feb 12, 2026
Glazer Capital, LLC 7.0M 4.2% Feb 12, 2026
Vista Equity Partners Fund Vi, L.P. 0
% of shares outstanding 0.0% Filing date Dec 29, 2025
Vista Equity Partners Fund Vi, L.P. 0 0.0% Dec 29, 2025
Sapphire Ventures, L.L.C. 222K
% of shares outstanding 0.0% Filing date Feb 10, 2023
Sapphire Ventures, L.L.C. 222K 0.0% Feb 10, 2023
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Integral Ad Science Holding Corp. (IAS) ownership FAQ

Who owns IAS?

1 reporting institutions disclosed IAS position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.