Ticker · CUSIP 05352A100

AVTR

AVANTOR INC

Healthcare·Medical Instruments & Supplies

···Share

Holders (tracked)

Combined shares

22,593,838

Combined value

$177.14M

Last close

$8.52

Quarter

2026Q1

Price is +8.7% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$8.52-6.58 (-43.58%)H $15.60 · L $7.41 · Avg Vol 11.7M

Congress buyCongress sell

Tracked holders · last 8 quarters

-15 vs previous quarter over the last 8.

SEC event timeline

28 events

Greenhaven Associates added2026-04-06
+2,093,185 shares · 2026Q1
Position
D.E. Shaw & Co. added2026-02-17
+4,835,148 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) trimmed2026-02-17
−6,728,978 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+129,831 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2026-02-17
+966,487 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−2,495,068 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+26,022 shares · 2025Q4
Position
Wellington Management opened position2026-02-17
+23,436,636 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+323,394 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+3,182,434 shares · 2025Q4
Position
Dodge & Cox trimmed2026-02-13
−681,745 shares · 2025Q4
Position
Southeastern Asset (Longleaf) trimmed2026-02-13
−1,600,902 shares · 2025Q4
Position
Renaissance Technologies exited2026-02-12
−1,651,100 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+6,398,087 shares · 2025Q4
Position
Greenhaven Associates added2026-01-07
+2,189,083 shares · 2025Q4
Position
Southeastern Asset (Longleaf) opened position2025-11-14
+5,149,420 shares · 2025Q3
Position
AQR Capital Management trimmed2025-11-14
−831,734 shares · 2025Q3
Position
Steve Cohen (Point72) added2025-11-14
+858,428 shares · 2025Q3
Position
Two Sigma Investments trimmed2025-11-14
−2,702 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+1,358,707 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+2,689,632 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+31,083 shares · 2025Q3
Position
Wellington Management exited2025-11-14
−82,608 shares · 2025Q3
Position
Renaissance Technologies added2025-11-13
+416,200 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−8,036,188 shares · 2025Q3
Position
Dodge & Cox added2025-11-13
+313,404 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−27,793 shares · 2024Q3
Position
Greenhaven Associates opened position2025-11-04
+18,311,570 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for AVTR →

Follow-the-investor returns

If you'd copied each holder of AVTR…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Greenhaven Associates	2025Q3	$11.95	-28.7%	$192.5M

Who moved on this name in 2026Q1

Position changes reported for the latest quarter, grouped by direction.

New positions0

—

Added to1

Greenhaven Associates
+2,093,185
$16.4M

Trimmed0

—

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q2	19	163,982,774	$166.64B	—
2022Q3	21	123,694,412	$2.42B	+2
2022Q4	19	120,406,598	$2.54B	-2
2023Q1	19	99,535,014	$2.10B	—
2023Q2	14	98,818,058	$2.03B	-5
2023Q3	16	99,132,088	$2.09B	+2
2023Q4	14	153,574,695	$3.51B	-2
2024Q1	15	129,693,585	$3.32B	+1
2024Q2	16	127,442,217	$2.70B	+1
2024Q3	16	83,861,534	$2.17B	—
2024Q4	12	108,210,455	$2.28B	-4
2025Q1	13	108,490,944	$1.76B	+1
2025Q2	15	134,821,543	$1.81B	+2
2025Q3	13	159,855,765	$1.99B	-2
2025Q4	16	189,994,694	$2.18B	+3
2026Q1	1	22,593,838	$177.1M	-15

Congress members trading this stock

Date	Member	Type	Amount range	Filing
2025-08-13	Gilbert Cisneros	Sell	$1K – $15K	PDF ↗
2025-08-12	Gilbert Cisneros	Sell (P)	$1K – $15K	PDF ↗
2025-07-23	Gilbert Cisneros	Sell (P)	$1K – $15K	PDF ↗
2025-06-17	Lisa McClain	Sell (P)	$1K – $15K	PDF ↗
2025-06-11	Lisa McClain	Buy	$1K – $15K	PDF ↗

Who owns AVTR

1 super-investors · 2026Q1

Tracked stake

22.59M

Combined value

$177M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added1

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Greenhaven Associates	22.59M	$177M	2.9%	Added+2.09M

Recent moves

20 transactions

ADDGreenhaven Associates
+2,093,185 · 2026Q1
ADDT. Rowe Price
+26,022 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−6,728,978 · 2025Q4
ADDAQR Capital Management
+3,182,434 · 2025Q4
ADDD.E. Shaw & Co.
+4,835,148 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+323,394 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+966,487 · 2025Q4
SOLDSteve Cohen (Point72)
−2,495,068 · 2025Q4
NEWWellington Management
+23,436,636 · 2025Q4
ADDTwo Sigma Investments
+129,831 · 2025Q4
TRIMSoutheastern Asset (Longleaf)
−1,600,902 · 2025Q4
TRIMDodge & Cox
−681,745 · 2025Q4
SOLDRenaissance Technologies
−1,651,100 · 2025Q4
NEWNorges Bank (Norway SWF)
+6,398,087 · 2025Q4
ADDGreenhaven Associates
+2,189,083 · 2025Q4
ADDD.E. Shaw & Co.
+1,358,707 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+2,689,632 · 2025Q3
ADDSteve Cohen (Point72)
+858,428 · 2025Q3
TRIMTwo Sigma Investments
−2,702 · 2025Q3
ADDT. Rowe Price
+31,083 · 2025Q3

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