Avantor Inc

$AVTR
13F holders
421
Net 13F flow · Q
Insider buys · 90d
0
Insider net · 90d
Congress · 90d
0
Convergence

Institutional holders

Top 10 of 421 · Source: 13F-HR
01
Second Line Capital, LLC
02
Al Warda Investments RSC Ltd
03
Axa S.a.
04
State Street
05
D. E. Shaw & Co., Inc.
06
Saltoro Capital, LP
07
Gladwyn Financial Advisors, Inc.
08
Clarkston Capital Partners, LLC
09
Roberts Capital Advisors, LLC
10
New Mountain Capital, L.L.C.

Each fund name links to that filer's expert page. Share counts and per-fund weights are pending the 13F ingest fix (portfolios_expertholding.units is currently mis-populated — see the same caveat on the fund detail page's holdings table). Quarter-over-quarter delta ships with the metrics pipeline.

See all 421 13F holders · Pro →

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.

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.

Insider activity · last 90 days

17 transactions · 8 filers
12 Feb 2026
Summe Gregory L
▲ BOUGHT
100,000
$9.40
P
05 Dec 2025
Mehra Sanjeev K
▲ BOUGHT
350,000
$11.09
P
17 Nov 2025
Ligner Emmanuel
▲ BOUGHT
87,500
$11.35
P
30 Oct 2025
Summe Gregory L
▲ BOUGHT
100,000
$11.25
P
21 Aug 2025
Summe Gregory L
▲ BOUGHT
100,000
$12.56
P
05 Aug 2025
Eck Steven W
▼ SOLD
3,476
$11.39
S
23 May 2025
Summe Gregory L
▲ BOUGHT
30,000
$12.50
P
22 May 2025
Summe Gregory L
▲ BOUGHT
20,000
$12.65
P
07 May 2025
Summe Gregory L
▲ BOUGHT
25,000
$12.00
P
28 Apr 2025
Kang Lan
▲ BOUGHT
5,000
$12.57
P
28 Apr 2025
Peacock Jonathan M
▲ BOUGHT
8,091
$12.81
P
29 Apr 2025
Massaro Joseph R
▲ BOUGHT
8,100
$12.30
P

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.

Congress trades · last 90 days

28 disclosures · STOCK Act
House · California · Traded Aug 13
SOLD
$1K–$15K
Sep 12STOCK
House · California · Traded Aug 12
SOLD
$1K–$15K
Sep 12STOCK
House · California · Traded Jul 23
SOLD
$1K–$15K
Aug 14STOCK
House · Michigan · Traded Jun 17
SOLD
$1K–$15K
Aug 13STOCK
House · Michigan · Traded Jun 11
BOUGHT
$1K–$15K
Aug 13STOCK
House · California · Traded Nov 14
SOLD
$1K–$15K
Dec 5STOCK
House · California · Traded Nov 13
SOLD
$1K–$15K
Dec 5STOCK
House · California · Traded Nov 8
SOLD
$1K–$15K
Dec 5STOCK
House · California · Traded Nov 14
SOLD
$1K–$15K
Dec 5STOCK
House · California · Traded Nov 13
SOLD
$1K–$15K
Dec 5STOCK
See full $AVTR Congress history →

Convergence · Pattern Engine ships in v1.1

30-day window
In development

Convergence detection for $AVTR lands with the Pattern Engine.

Once the Pattern Engine ships, this section will surface every active convergence event involving $AVTR — the institutional managers and Congress members on the same name, the 30-day window, and the combined position size.

Source data: SEC EDGAR · 13F-HR · Form 4 · CapitolTrades · Last refreshed 10:49 UTC.