Form 13-F position report

WEST PHARMACEUTICAL SERV INC

Reported by BILL & MELINDA GATES FOUNDATION TRUST

Company profile Manager portfolio Source filing
WST CUSIP 955306105 Manager CIK 0001166559
Latest reported change

First reported at 444,500 shares this quarter.

New
% of reported 13F value 0.24% This manager · Q1 2025
Shares 444,500 Quarter-end amount reported
Reported value $99,514,660 Fair value at quarter end
Consecutive quarters held 1 Through Q1 2025

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

6 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q2 2026 Unchanged 444,500 0 (0.0%) 0.46% $159,575,500 2026-08-14
Q1 2026 Unchanged 444,500 0 (0.0%) 0.35% $111,409,480 2026-05-15
Q4 2025 Unchanged 444,500 0 (0.0%) 0.35% $122,299,730 2026-02-17
Q3 2025 Unchanged 444,500 0 (0.0%) 0.32% $116,605,685 2025-11-14
Q2 2025 Unchanged 444,500 0 (0.0%) 0.2% $97,256,600 2025-08-14
Q1 2025 New 444,500 +444,500 (0.0%) 0.24% $99,514,660 2025-05-15
Institutional context

Who else reported the position

832 managers reported WEST PHARMACEUTICAL SERV INC for Q1 2025.

Manager Activity Shares Change % of reported 13F Reported value Tenure
VANGUARD GROUP INC Added 9,231,721 +244,259 0.04% $2,066,797,697 48 qtrs
BlackRock Inc Reduced 6,930,119 -520,601 0.03% $1,551,515,090 3 qtrs
THE BANK OF NEW YORK MELLON CORPORATION Reduced 3,375,321 -74,490 0.15% $755,666,790 48 qtrs
BROWN ADVISORY INC Added 3,268,478 +716,442 1.05% $731,746,933 33 qtrs
STATE STREET CORPORATION Reduced 3,203,536 -43,177 0.03% $717,207,640 48 qtrs
Artisan Partners Limited Partnership Reduced 2,195,483 -915,420 0.79% $491,524,734 31 qtrs
GEODE CAPITAL MANAGEMENT LLC Added 1,853,693 +74,753 0.03% $413,695,558 48 qtrs
Durable Capital Partners LP Added 1,573,119 +935,721 3.15% $352,189,882 21 qtrs
FRANKLIN RESOURCES INC Reduced 1,560,597 -220,287 0.1% $349,386,455 48 qtrs
VAN ECK ASSOCIATES CORP Added 1,447,848 +758,355 0.42% $324,144,000 20 qtrs
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Filing details and methodology As reported
Report period
March 31, 2025
Filed
May 15, 2025
Filing type
13F-HR
Position type
COM

Voting authority reported

Sole
444,500
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.