L3VLUP
ProSign in

AVTR in the 13F filings

Avantor Inc · CUSIP 05352A100

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
27
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 7 listed it in both
Shares listed
203,439,597
combined, among listed positions
Reported value
$2.3bn
combined, at the quarter end

Among the 92 comparable managers: 17 buyers (opened or added shares) and 16 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +15,769,367.

Managers listing AVTR in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

27 of 27 holders

ActionFiling
Dodge & Cox117,065,143$1.3bn0.72%Trimmed-681,74513 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP23,436,636$269munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Invesco Ltd17,178,716$197munder 0.1%Added+1,125,34819 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)7,670,732$88munder 0.1%Added+48,90217 Feb 2026 (the filing on sec.gov)
MFS Investment Management7,214,408$83munder 0.1%Trimmed-287,67822 Jan 2026 (the filing on sec.gov)
D. E. Shaw & Co.6,215,923$71munder 0.1%Added+4,835,14817 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC4,391,597$50munder 0.1%Added+3,182,43417 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC3,831,817$44munder 0.1%Added+3,800,80612 Feb 2026 (the filing on sec.gov)
Millennium Management LLC3,668,997$42munder 0.1%Added+966,48717 Feb 2026 (the filing on sec.gov)
Southeastern Asset Management Inc3,548,518$41m1.81%Trimmed-1,600,90213 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP2,584,006$30m0.21%Newnew17 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,243,956$14munder 0.1%Trimmed-6,728,97817 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC991,436$11munder 0.1%Trimmed-37,79213 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP857,513$9.8munder 0.1%Trimmed-1,01217 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC581,330$6.7munder 0.1%Added+218,93913 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc563,477$6.5munder 0.1%Added+26,02217 Feb 2026 (the filing on sec.gov)
Moore Capital Management LP499,086$5.7m0.08%Added+205,49217 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP412,713$4.7munder 0.1%Added+129,83117 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp323,394$3.7munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd307,978$3.5munder 0.1%Added+20,57217 Feb 2026 (the filing on sec.gov)
Quantbot Technologies LP224,194$2.6m0.09%Trimmed-22,30010 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC209,798$2.4munder 0.1%Added+44,68613 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC143,248$1.6munder 0.1%Added+4,98427 Oct 2026 (the filing on sec.gov)
Susquehanna International Group LLP135,568$1.6munder 0.1%Added+122,28617 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP97,014$1.1munder 0.1%Trimmed-153,10917 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (6)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
9 in Q3 2024 to 5 in Q2 2026

Tracked managers listing it, at least.

01020302020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
AVTR by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201910$2.1bnn.a.n.a.
Q3 20199$1.4bnn.a.n.a.
Q4 201911$2.0bnn.a.n.a.
Q1 202011$1.3bnn.a.n.a.
Q2 202012$1.9bnn.a.n.a.
Q3 202022$2.7bnn.a.n.a.
Q4 202021$4.2bnn.a.n.a.
Q1 202115$4.2bnn.a.n.a.
Q2 202112$5.2bnn.a.n.a.
Q3 202117$6.3bnn.a.n.a.
Q4 202116$6.6bnn.a.n.a.
Q1 202222$5.5bnn.a.n.a.
Q2 202220$5.4bnn.a.n.a.
Q3 202223$2.2bnn.a.n.a.
Q4 202220$2.0bnn.a.n.a.
Q1 202316$1.5bnn.a.n.a.
Q2 202314$1.4bnn.a.n.a.
Q3 202318$1.9bnn.a.n.a.
Q4 202314$3.0bn99
Q1 202416$3.1bn96
Q2 202413$2.1bn88
Q3 20249$2.6bn65
Q4 202411$2.8bn64
Q1 202510$2.2bn92
Q2 202510$2.0bn74
Q3 202510$1.8bn74
Q4 20257$1.8bn1716
Q1 20269$1.3bn1914
Q2 20265$1.5bn1616

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

AVTR and LLY →AVTR and JNJ →AVTR and VRTX →Choose a stock to compare with AVTR →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own AVTR, latest filings →Back to the 13F Explorer →