Who holds ticker verified against the SEC company list on 2026-09-11 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

West Pharmaceutical Services Inc - US · Equity · Q1 2026 · 9 members disclosed WST ↗
13F filers reporting this class for the quarter ended 2026-03-31; 1–500 of 542 holders are listed, largest first
542
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$13.9B
holders whose share count rose or who opened the position (new + add), by shares
257
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
101
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 WST ranked by reported value, 1–25 of 542 holders
#FilerReported valueSharesΔ sharesChange
1BlackRock, Inc.$1.7B6,836,714+236,979ADD
2VANGUARD CAPITAL MANAGEMENT LLC$1.2B4,683,286—NO PRIOR
3VANGUARD PORTFOLIO MANAGEMENT LLC$1.0B4,094,009—NO PRIOR
4STATE STREET CORP$826M3,293,778+41,758ADD
5Artisan Partners Limited Partnership$666M2,657,893−192,508TRIM
6GENERATION INVESTMENT MANAGEMENT LLP$562M2,243,976+682,107ADD
7MORGAN STANLEY$366M1,458,282−73,576TRIM
8BROWN ADVISORY INC$336M1,340,877−602,729TRIM
9Longview Partners (Guernsey) LTD$330M1,315,403+184,377ADD
10FMR LLC$313M1,249,748+1,140,094ADD
11APG Asset Management N.V.$276M1,267,282+68,277ADD
12Invesco Ltd.$265M1,056,007+147,382ADD
13UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$226M902,764−2,892TRIM
14TD ASSET MANAGEMENT INC$193M768,953+163,227ADD
15NORTHERN TRUST CORP$183M731,283+4,771ADD
16JACOBS LEVY EQUITY MANAGEMENT, INC$177M705,336+65,775ADD
17ProShare Advisors LLC$165M660,084+73,237ADD
18Amundi$161M644,065+296,639ADD
19Findlay Park Partners LLP$155M616,766−50,160TRIM
20Capital Research Global Investors$151M604,011+604,011NEW
21CHARLES SCHWAB INVESTMENT MANAGEMENT INC$139M554,332+11,529ADD
22Epoch Investment Partners, Inc.$137M545,050+39,745ADD
23SEI INVESTMENTS CO$133M529,261−62,496TRIM
24ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$128M510,516+210,112ADD
25Legal & General Group Plc$127M506,458+3,772ADD
Show the top 500 of 542 holders
Truncated by Public Filings. Top 500 of 542 holders shown; the rest are on EDGAR. Method ↗
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · WST

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 $0 held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · West Pharmaceutical Services Inc - US

Merged timeline of congressional filings and notable-manager moves on WST
DateWhoChangeSize
2026-05-15Viking Global Investors 13FADD+121,920 sh
2026-05-15Tudor Investment Corp 13FADD+24,745 sh
2026-05-15Bridgewater Associates 13FADD+19,088 sh
2026-05-15Gotham Asset Management 13FADD+5,324 sh
2026-05-15Moore Capital Management 13FEXIT−95,000 sh
2026-05-14Caxton Associates 13FNEW+1,457 sh

6 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.