Avantor
AVTR
466 hedge funds and large institutions have $8.47B invested in Avantor in 2025 Q3 according to their latest regulatory filings, with 76 funds opening new positions, 143 increasing their positions, 203 reducing their positions, and 113 closing their positions.
0% more funds holding in top 10
Funds holding in top 10: 13 → 13 (0)
3% less call options, than puts
Call options by funds: $16.8M | Put options by funds: $17.3M
4.86% less ownership
Funds ownership: 104.42% → 99.56% (-4.9%)
8% less funds holding
Funds holding: 506 → 466 (-40)
24% less capital inflows, than outflows
Capital inflows: $1.38B | Capital outflows: $1.82B
30% less repeat investments, than reductions
Existing positions increased: 143 | Existing positions reduced: 203
33% less first-time investments, than exits
New positions opened: 76 | Existing positions closed: 113
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GA
Greenhaven Associates
Purchase,
New York
|
+$236M |
| 2 |
Engine Capital Management
New York
|
+$183M |
| 3 |
London Company of Virginia
Richmond,
Virginia
|
+$165M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$66.8M |
| 5 |
Southeastern Asset Management
Memphis,
Tennessee
|
+$66.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$304M |
| 2 |
BlackRock
New York
|
-$144M |
| 3 |
Janus Henderson Group
London,
|
-$121M |
| 4 |
Bessemer Group
Woodbridge,
New Jersey
|
-$90.2M |
| 5 |
1832 Asset Management
Toronto,
Ontario, Canada
|
-$60.7M |
AVTR Hedge Fund Activity: Q3 2025 in Review
466 of the 7,658 institutional investors tracked by Wall St. Rank reported a position in Avantor (AVTR) for Q3 2025, worth a combined $8.47B — down 12% from $9.6B a quarter earlier.
Sellers outnumbered buyers: 113 funds closed out of AVTR and 76 opened new positions — a net loss of 37 holders — while 203 trimmed existing stakes and 143 added.
The largest buyer was Greenhaven Associates, opening a new position worth an estimated $236M. The largest seller was T. Rowe Price Investment Management, cutting an estimated $304M.
- 466 institutional investors held Avantor (AVTR) as of Q3 2025, down from 506 in Q2 2025.
- Funds reported $8.47B of Avantor stock for Q3 2025, down 12% quarter-over-quarter.
- 76 funds opened new Avantor positions in Q3 2025 and 113 closed out, a net change of -37 holders.
- The largest Avantor buyer in Q3 2025 was Greenhaven Associates, an estimated $236M added.
- The largest Avantor seller in Q3 2025 was T. Rowe Price Investment Management, an estimated $304M sold.
Based on aggregated 13F filings for Q3 2025.