WhaleCreep

Which hedge funds own AVTR? AVANTOR INC, Q2 2026 13F holders

HealthcareMedical Instruments & Supplies

42 tracked hedge funds disclosed a position in AVTR (AVANTOR INC) in their Q2 2026 13F filings, worth $1.0bn in total. The largest holder by portfolio weight is Engine Capital Management, LP at 19.1% of its book. 12 opened a new position this quarter: Western Standard LLC, Melqart Asset Management (UK) Ltd, Lecap Asset Management Ltd, Arrowpoint Investment Partners (Singapore) Pte. Ltd.. 23 exited: Eversept Partners, LP, Stanley Capital Management, LLC, Twinbeech Capital LP.

42
Holders
Tracked managers whose filing for the quarter reports a long equity position in the security.
12
New this quarter
Holders whose previous filing (at most two quarters earlier) did not report the security.
23
Exited this quarter
Tracked managers whose previous filing reported the security and whose filing for the quarter does not.
$50.7m
Inflow, new holders
Combined value of the positions the new holders reported for the quarter.
$83.3m
Outflow, exits
Combined value the exiting managers reported for the security in their previous filing.
$1.0bn
Combined value
Sum of the holders' reported positions in the security.
3.4%
Share of managers holding
Holders as a share of tracked managers filing for that quarter. Comparable across the 2024 coverage expansion, where the raw holder count is not.

Holders, Q2 2026

42 rows
Engine Capital Management, LP Hedge fund19.1%$197m19.86m+0.4%held
Western Standard LLC Hedge fund7.1%$20.9m2.11m–new
Greenhaven Associates (Edgar Wachenheim) Long-only investor2.8%$244m24.64m+9.0%added
Southeastern Asset Management (Mason Hawkins) Long-only investor2.4%$46.8m4.73m+34%added
Prescott General Partners LLC Hedge fund1.3%$25.7m2.60m0.0%held
Voss Capital, LP Hedge fund1.3%$26.2m2.65m−40%reduced
Clearline Capital LP Hedge fund0.7%$11.1m1.12m0.0%held
Melqart Asset Management (UK) Ltd Hedge fund0.6%$6.3m635,800–new
Lecap Asset Management Ltd Hedge fund0.5%$1.2m119,994–new
Arrowpoint Investment Partners (Singapore) Pte. Ltd. Hedge fund0.4%$1.3m131,088–new
Freestone Grove Partners LP Hedge fund0.4%$56.6m5.71m+105%added
CastleKnight Management LP Hedge fund0.3%$7.4m751,700–new
Capricorn Fund Managers Ltd Hedge fund0.2%$3.0m300,700–new
Alpha Wealth Funds, LLC Hedge fund0.1%$198k20,000+33%added
Brant Point Investment Management LLC Hedge fund0.1%$495k50,000–new
Marshall Wace, LLP Hedge fund0.1%$130m13.13m+282%added
Mangrove Partners IM, LLC Hedge fund0.09%$1.4m139,111−1.0%reduced
Edgestream Partners, L.P. Hedge fund0.09%$3.0m299,853−28%reduced
Dark Forest Capital Management LP Hedge fund0.08%$1.3m130,438+18%added
ADAR1 Capital Management, LLC Hedge fund0.06%$1.3m130,000+63%added
D. E. Shaw & Co., Inc. Hedge fund0.06%$94.8m9.57m−27%reduced
Gsa Capital Partners LLP Hedge fund0.05%$800k80,841+399%added
AlphaGrep UK Ltd Hedge fund0.05%$156k15,752−81%reduced
Armistice Capital, LLC Hedge fund0.05%$1.7m170,000–new
AQR Capital Management LLC Hedge fund0.04%$115m11.63m+139%added
ExodusPoint Capital Management, LP Hedge fund0.02%$2.5m249,085−30%reduced
Squarepoint Ops LLC Hedge fund0.02%$10.0m1.01m+418%added
Kintegral Advisory, LLC Hedge fund0.02%$209k21,1260.0%held
Prelude Capital Management, LLC Hedge fund0.02%$228k23,0000.0%held
Bridgewater Associates, LP Hedge fund0.01%$3.0m301,219+135%added
Fulcrum Asset Management LLP Hedge fund0.01%$82.2k8,200–new
SummitTX Capital, L.P. Hedge fund0.01%$310k31,285–new
Aristeia Capital, L.L.C. Hedge fund0.01%$510k51,523−5.6%reduced
Quantbot Technologies LP Hedge fund0.01%$196k19,791+231%added
Engineers Gate Manager LP Hedge fund0.01%$540k54,570+362%added
Millennium Management LLC Hedge fund0.01%$7.5m753,575−69%reduced
Arrowstreet Capital, Limited Partnership Hedge fund0.0%$8.1m813,548–new
Citadel Advisors LLC Hedge fund0.0%$4.0m399,147−30%reduced
Magnetar Financial LLC Hedge fund0.0%$208k21,017−91%reduced
Quarry LP Hedge fund0.0%$1.4k140−97%reduced
Twin Tree Management, LP Hedge fund0.0%$1.2k121–new
CVA Family Office, LLC Family office0.0%$1.7k176+604%added