AVANTOR INC (AVTR) Stock Institutional Trading Activity
AVANTOR INC (AVTR) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Greenhaven Associates, Longleaf Partners, Olstein Capital Management, Renaissance Technologies LLC, and Dodge & Cox Stock Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q4 2022 | Renaissance Technologies LLC | Sell | -2,870,700 | 2,083,600 | $43,943 |
| Q4 2022 | Causeway Capital Management | Buy | 422,921 | 1,362,265 | $28,730,165 |
| Q4 2022 | Parnassus Endeavor Fund | Sell | -489,974 | 8,752,391 | $184,587,926 |
| Q3 2022 | First Eagle U.S. Value | Buy | 626 | 1,106 | $22 |
| Q3 2022 | Causeway Capital Management | Buy | 939,344 | 939,344 | $18,411 |
| Q3 2022 | Viking Global Investors | Sell | -3,270,023 | 2,898,662 | $56,814 |
| Q3 2022 | Renaissance Technologies LLC | Buy | 4,905,100 | 4,954,300 | $97,104 |
| Q3 2022 | Parnassus Endeavor Fund | Buy | 1,756,524 | 9,242,365 | $181,150 |
| Q2 2022 | Renaissance Technologies LLC | Sell | -448,349 | 49,200 | $1,530 |
| Q2 2022 | Viking Global Investors | Buy | 2,708,722 | 6,168,685 | $191,846 |
| Q2 2022 | Parnassus Endeavor Fund | Buy | 372,881 | 7,485,841 | $232,810 |
| Q1 2022 | First Eagle U.S. Value | Buy | 480 | 480 | $16 |
| Q1 2022 | Viking Global Investors | Sell | -5,327,379 | 3,459,963 | $117,016 |
| Q1 2022 | Parnassus Endeavor Fund | Buy | 1,213,183 | 7,112,960 | $240,560 |
| Q1 2022 | Third Point | Sell | -2,440,000 | 8,360,000 | $282,735 |
| Q4 2021 | Parnassus Endeavor Fund | Buy | 21,442 | 5,899,777 | $248,617 |
| Q4 2021 | Viking Global Investors | Buy | 1,666,150 | 8,787,342 | $370,299 |
| Q3 2021 | Parnassus Endeavor Fund | Buy | 453,179 | 5,878,335 | $240,424 |
| Q3 2021 | Viking Global Investors | Sell | -4,610,870 | 7,121,192 | $291,257 |
| Q3 2021 | Third Point | Buy | 300,000 | 10,800,000 | $441,720 |
| Q2 2021 | Parnassus Endeavor Fund | Buy | 360,680 | 5,425,156 | $192,647 |
| Q2 2021 | Third Point | Sell | -500,000 | 10,500,000 | $372,855 |
| Q2 2021 | Viking Global Investors | Sell | -3,775,826 | 11,732,062 | $416,606 |
| Q1 2021 | Parnassus Endeavor Fund | Buy | 5,064,476 | 5,064,476 | $146,515 |
| Q1 2021 | Renaissance Technologies LLC | Sell | -713,926 | 497,549 | $14,394 |
| Q1 2021 | Viking Global Investors | Buy | 2,149,159 | 15,507,888 | $448,643 |
| Q4 2020 | Renaissance Technologies LLC | Sell | -1,624,325 | 1,211,475 | $34,103 |
| Q4 2020 | Third Point | Buy | 6,000,000 | 11,000,000 | $309,650 |
| Q4 2020 | Viking Global Investors | Buy | 5,141,022 | 13,358,729 | $376,048 |
| Q3 2020 | Renaissance Technologies LLC | Buy | 970,600 | 2,835,800 | $63,777 |
Frequently asked questions about AVTR activity
Which institutional owners are buying AVTR?
Institutional owners buying AVTR include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in AVTR activity?
"Buy" means an investor increased their reported position in AVTR compared to the prior reporting period. This reflects growing exposure to AVANTOR INC (AVTR) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in AVTR increasing?
Institutional interest in AVTR can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.