Avantor
AVTR
421 hedge funds and large institutions have $7.97B invested in Avantor in 2025 Q4 according to their latest regulatory filings, with 65 funds opening new positions, 116 increasing their positions, 193 reducing their positions, and 103 closing their positions.
2.23% more ownership
Funds ownership: 99.57% → 101.8% (+2.2%)
6% less capital invested
Capital invested by funds: $8.47B → $7.97B (-$498M)
10% less funds holding
Funds holding: 466 → 421 (-45)
37% less first-time investments, than exits
New positions opened: 65 | Existing positions closed: 103
40% less repeat investments, than reductions
Existing positions increased: 116 | Existing positions reduced: 193
46% less funds holding in top 10
Funds holding in top 10: 13 → 7 (-6)
74% less call options, than puts
Call options by funds: $13.5M | Put options by funds: $52.2M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
+$288M |
| 2 |
Morgan Stanley
New York
|
+$138M |
| 3 |
D.E. Shaw & Co
New York
|
+$59.5M |
| 4 |
Jane Street
New York
|
+$46.8M |
| 5 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$44.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ECM
Engine Capital Management
New York
|
-$95.9M |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$82.8M |
| 3 |
Holocene Advisors
New York
|
-$68.6M |
| 4 |
Manulife (Manufacturers Life Insurance)
Canada,
Ontario, Canada
|
-$40.3M |
| 5 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$35.5M |
AVTR Hedge Fund Activity: Q4 2025 in Review
421 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Avantor (AVTR) for Q4 2025, worth a combined $7.97B — down 5.9% from $8.47B a quarter earlier.
Sellers outnumbered buyers: 103 funds closed out of AVTR and 65 opened new positions — a net loss of 38 holders — while 193 trimmed existing stakes and 116 added.
The largest buyer was Wellington Management Group, opening a new position worth an estimated $288M. The largest seller was Engine Capital Management, cutting an estimated $95.9M.
- 421 institutional investors held Avantor (AVTR) as of Q4 2025, down from 466 in Q3 2025.
- Funds reported $7.97B of Avantor stock for Q4 2025, down 5.9% quarter-over-quarter.
- 65 funds opened new Avantor positions in Q4 2025 and 103 closed out, a net change of -38 holders.
- The largest Avantor buyer in Q4 2025 was Wellington Management Group, an estimated $288M added.
- The largest Avantor seller in Q4 2025 was Engine Capital Management, an estimated $95.9M sold.
Based on aggregated 13F filings for Q4 2025.