Avantor Inc

$AVTR

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Smart money positioned

12 of the Top-200 alpha managers hold $AVTR as of the latest 13F snapshot.

13F holders

421

Insider buys · 90d

Congress · 90d

Smart Money · top-200 alpha cohort

12 holders · Q1 2026

$AVTR is held by 12 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 0.06%, with an average of 0.02% of portfolio. Largest holder: Oxford Asset Management LLP at 0.06%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.

Oxford Asset Management LLP

0.06% held

α +10.3pts

Aigen Investment Management, LP

0.04% held

α +50.5pts

ADAR1 Capital Management, LLC

0.04% held

α +74.0pts

Wellington Management Group LLP

Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.

Institutional holders

Top 10 of 421 · Source: 13F-HR

Second Line Capital, LLC

0.52% of portfolio

119,648,329 sh

Al Warda Investments RSC Ltd

D. E. Shaw & Co., Inc.

Gladwyn Financial Advisors, Inc.

0.04% of portfolio

15,606,510 sh

Clarkston Capital Partners, LLC

4.01% of portfolio

15,105,065 sh

Roberts Capital Advisors, LLC

0.08% of portfolio

14,786,678 sh

New Mountain Capital, L.L.C.

100.00% of portfolio

14,000,000 sh

See all 421 13F holders · Pro →

Insider activity · last 90 days

17 transactions · 8 filers

12 Feb 2026

Summe Gregory L —

▲ BOUGHT

100,000

$9.40

05 Dec 2025

Mehra Sanjeev K —

▲ BOUGHT

350,000

$11.09

17 Nov 2025

Ligner Emmanuel —

▲ BOUGHT

87,500

$11.35

30 Oct 2025

Summe Gregory L —

▲ BOUGHT

100,000

$11.25

21 Aug 2025

Summe Gregory L —

▲ BOUGHT

100,000

$12.56

05 Aug 2025

Eck Steven W —

▼ SOLD

3,476

$11.39

23 May 2025

Summe Gregory L —

▲ BOUGHT

30,000

$12.50

22 May 2025

Summe Gregory L —

▲ BOUGHT

20,000

$12.65

07 May 2025

Summe Gregory L —

▲ BOUGHT

25,000

$12.00

28 Apr 2025

Kang Lan —

▲ BOUGHT

5,000

$12.57

28 Apr 2025

Peacock Jonathan M —

▲ BOUGHT

8,091

$12.81

29 Apr 2025

Massaro Joseph R —

▲ BOUGHT

8,100

$12.30

Transaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.