Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

AVANTOR INC · common stock (filed as COM) · Q1 2026 · 5 members disclosed AVTR ↗
13F filers reporting this class for the quarter ended 2026-03-31
357
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$4.8B
holders whose share count rose or who opened the position (new + add), by shares
206
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
61
FILING WINDOW OPEN
Q3 2026 filings are due by 2026-11-16 — figures for that quarter will change; missing filers are not zeros.

Holders — quarter ended 2026-03-31

by reported value · Δ shares vs 2025-12-31Holders rank by reported value. The change kind — new, add, trim or exit — is read from the share count against the prior quarter, never from the reported value.
13F holders of AVTR ranked by reported value, 1–25 of 424 holders
#FilerReported valueSharesΔ sharesChange
1DODGE & COX$938M119,648,329+2,583,186ADD
2BlackRock, Inc.$515M65,703,554+6,106,628ADD
3VANGUARD PORTFOLIO MANAGEMENT LLC$245M31,275,847—NO PRIOR
4VANGUARD CAPITAL MANAGEMENT LLC$240M30,606,112—NO PRIOR
5WELLINGTON MANAGEMENT GROUP LLP$190M24,224,156+787,520ADD
6BARROW HANLEY MEWHINNEY & STRAUSS LLC$175M22,358,399−10,928,775TRIM
7STATE STREET CORP$162M20,721,079+511,673ADD
8Engine Capital Management, LP$155M19,780,830+7,853,018ADD
9DIMENSIONAL FUND ADVISORS LP$132M16,894,649+2,288,053ADD
10New Mountain Capital, L.L.C.$110M14,000,0000NO CHANGE
11D. E. Shaw & Co., Inc.$103M13,110,674+6,894,751ADD
12GEODE CAPITAL MANAGEMENT, LLC$101M12,891,421+912,861ADD
13LONDON CO OF VIRGINIA$85.1M10,852,257−1,084,265TRIM
14FULLER & THALER ASSET MANAGEMENT, INC.$83.4M10,632,112+7,387,318ADD
15Clarkston Capital Partners, LLC$67.7M8,629,389−6,475,676TRIM
16First Pacific Advisors, LP$63.4M8,089,023+4,120,403ADD
17Invesco Ltd.$63.3M8,073,854−9,104,862TRIM
18FMR LLC$59.7M7,610,318−60,414TRIM
19BANK OF AMERICA CORP /DE/$55.4M7,067,563+1,382,320ADD
20MORGAN STANLEY$47.8M6,098,287−11,370,131TRIM
21EARNEST PARTNERS LLC$47.2M6,024,712−7,095TRIM
22NORTHERN TRUST CORP$42.8M5,458,656+149,202ADD
23CHARLES SCHWAB INVESTMENT MANAGEMENT INC$42.4M5,410,744+531,321ADD
24SEI INVESTMENTS CO$41.5M5,287,850+46,707ADD
25JANE STREET GROUP, LLC$38.9M4,966,462+1,134,645ADD
Show all 424 holders
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · AVTR

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Use of congressional disclosure reports for commercial purposes, credit decisions or solicitation is restricted by 5 U.S.C. §13107(c).

Notable managers · quarter ended 2026-03-31

Trimming
1 Moore Capital Management $903K held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · AVANTOR INC

Merged timeline of congressional filings and notable-manager moves on AVTR
DateWhoChangeSize
2026-05-15Tudor Investment Corp 13FADD+2,021,043 sh
2026-05-15Gotham Asset Management 13FADD+965,823 sh
2026-05-15Bridgewater Associates 13FNEW+128,209 sh
2026-05-15Moore Capital Management 13FTRIM−383,933 sh
2026-05-14Caxton Associates 13FNEW+10,055 sh

5 newest, by filing date · 13F rows are quarter-end snapshots, not trades

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.