Avantor
AVTR
466 hedge funds and large institutions have $8.47B invested in Avantor in 2025 Q3 according to their latest regulatory filings, with 75 funds opening new positions, 144 increasing their positions, 203 reducing their positions, and 111 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% → 99.57% (-4.9%)
8% less funds holding
Funds holding: 505 → 466 (-39)
12% less capital invested
Capital invested by funds: $9.58B → $8.47B (-$1.11B)
29% less repeat investments, than reductions
Existing positions increased: 144 | Existing positions reduced: 203
32% less first-time investments, than exits
New positions opened: 75 | Existing positions closed: 111
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GA
Greenhaven Associates
Purchase,
New York
|
+$236M |
| 2 |
ECM
Engine Capital Management
New York
|
+$183M |
| 3 |
LCOV
London Company of Virginia
Richmond,
Virginia
|
+$165M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$66.8M |
| 5 |
SAM
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 7,640 institutional investors tracked by Wall St. Rank reported a position in Avantor (AVTR) for Q3 2025, worth a combined $8.47B — down 12% from $9.58B a quarter earlier.
Sellers outnumbered buyers: 111 funds closed out of AVTR and 75 opened new positions — a net loss of 36 holders — while 203 trimmed existing stakes and 144 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 505 in Q2 2025.
- Funds reported $8.47B of Avantor stock for Q3 2025, down 12% quarter-over-quarter.
- 75 funds opened new Avantor positions in Q3 2025 and 111 closed out, a net change of -36 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.