Atlas Venture Advisors’s Integral Ad Science IAS Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2025
Q4 | – | Sell |
-22,722,770
| Closed | -$231M | – | 4 |
|
|
2025
Q3 | $231M | Hold |
22,722,770
| – | – | 52.79% | 1 |
|
|
2025
Q2 | $189M | Hold |
22,722,770
| – | – | 44.51% | 2 |
|
|
2025
Q1 | $183M | Hold |
22,722,770
| – | – | 50.04% | 1 |
|
|
2024
Q4 | $237M | Hold |
22,722,770
| – | – | 51.19% | 1 |
|
|
2024
Q3 | $246M | Hold |
22,722,770
| – | – | 50.71% | 1 |
|
|
2024
Q2 | $221M | Hold |
22,722,770
| – | – | 48.58% | 2 |
|
|
2024
Q1 | $227M | Hold |
22,722,770
| – | – | 45.08% | 2 |
|
|
2023
Q4 | $327M | Hold |
22,722,770
| – | – | 57.48% | 1 |
|
|
2023
Q3 | $270M | Hold |
22,722,770
| – | – | 57.41% | 1 |
|
|
2023
Q2 | $409M | Sell |
22,722,770
-1
| -0% | -$17 | 69.22% | 1 |
|
|
2023
Q1 | $324M | Hold |
22,722,771
| – | – | 69.83% | 1 |
|
|
2022
Q4 | $200M | Hold |
22,722,771
| – | – | 68.9% | 1 |
|
|
2022
Q3 | $165M | Hold |
22,722,771
| – | – | 59.26% | 1 |
|
|
2022
Q2 | $226M | Hold |
22,722,771
| – | – | 71.25% | 1 |
|
|
2022
Q1 | $314M | Hold |
22,722,771
| – | – | 67.53% | 1 |
|
|
2021
Q4 | $505M | Buy |
22,722,771
+1
| +0% | +$23 | 70.13% | 1 |
|
|
2021
Q3 | $469M | Hold |
22,722,770
| – | – | 55.51% | 1 |
|
|
2021
Q2 | $468M | Buy |
+22,722,770
| New | +$468M | 48.54% | 1 |
|
Other funds holding IAS
Atlas Venture Advisors's IAS Position: Q4 2025 in Review
Atlas Venture Advisors sold out of Integral Ad Science (IAS) in Q4 2025, closing a stake of 22,722,770 shares — an estimated $231M sold.
Atlas Venture Advisors first reported a position in IAS in Q2 2021 and held it in 18 quarters. The position peaked at $505M in Q4 2021. 2 funds tracked by Wall St. Rank hold IAS as of Q4 2025.
- Atlas Venture Advisors reported no remaining Integral Ad Science position as of Q4 2025 after selling out during the quarter.
- Atlas Venture Advisors sold 22,722,770 Integral Ad Science shares in Q4 2025, an estimated $231M.
- Atlas Venture Advisors first reported a position in Integral Ad Science in Q2 2021 and held it in 18 quarters.
- Atlas Venture Advisors's Integral Ad Science position peaked at $505M in Q4 2021.
- 2 funds tracked by Wall St. Rank held Integral Ad Science as of Q4 2025.
Based on Atlas Venture Advisors's 13F filing for Q4 2025, filed 29 Jan 2026.