West Pharmaceutical Services, Inc.
West Pharmaceutical Services, Inc. (WST) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · WST · as of Mar 31, 2025
Ownership Breakdown
736
Institutional Holders
▼ 34 vs Q4
$15.61B
Total Inst. Value
▼ $7.24B vs Q4
70.65M
Shares Outstanding
freeFloat 99.36%
69.88M
13F Shares Held
▼ 19,911 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
WST largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC fabricated rubber products, nec | 9.23M | 12.73% | 12.73% | $2.07T | May 9, 2025 | ▲ 244.3K |
BLACKROCK, INC. fabricated rubber products, nec | 6.93M | 9.56% | 9.56% | $1.55T | May 2, 2025 | ▼ 520.6K |
BANK OF NEW YORK MELLON CORP fabricated rubber products, nec | 3.38M | 4.66% | 4.66% | $755.67B | Apr 29, 2025 | ▼ 74.5K |
BROWN ADVISORY INC fabricated rubber products, nec | 3.27M | 4.51% | 4.51% | $731.75B | Apr 30, 2025 | ▲ 716.4K |
STATE STREET CORP fabricated rubber products, nec | 3.20M | 4.42% | 4.42% | $717.21B | May 15, 2025 | ▼ 43.2K |
ARTISAN PARTNERS LIMITED PARTNERSHIP fabricated rubber products, nec | 2.20M | 3.03% | 3.03% | $491.52B | May 14, 2025 | ▼ 915.4K |
GEODE CAPITAL MANAGEMENT, LLC fabricated rubber products, nec | 1.85M | 2.56% | 2.56% | $413.70B | May 13, 2025 | ▲ 74.8K |
DURABLE CAPITAL PARTNERS LP fabricated rubber products, nec | 1.57M | 2.17% | 2.17% | $352.19B | May 15, 2025 | ▲ 935.7K |
APG ASSET MANAGEMENT N.V. fabricated rubber products, nec | 1.56M | 2.15% | 2.15% | $323.77B | May 14, 2025 | ▲ 124.7K |
FRANKLIN RESOURCES INC fabricated rubber products, nec | 1.56M | 2.15% | 2.15% | $349.39B | May 13, 2025 | ▼ 220.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
29
Increased
+5.64M shares2
New Positions
first time holders18
Decreased
−3.50M shares0
Sold Out
fully exitedNet shares change (top 50)
+2.13M
+5.64M / −3.50M
Net new holders
+13
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
WST insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Campbell Shane Alden SVP, Proprietary Segment | May 12, 2026 | Tax Withhold | 134.927 | $312.07 | $42.1K | 612.796 | Form 4 ↗ |
Campbell Shane Alden SVP, Proprietary Segment | May 12, 2026 | Tax Withhold | 84.329 | $312.07 | $26.3K | 274.13 | Form 4 ↗ |
Pucci Paolo director | May 4, 2026 | Award | 791 | — | — | 11.9K | Form 4 ↗ |
Michels Douglas A director | May 4, 2026 | Award | 791 | — | — | 46.5K | Form 4 ↗ |
Lockhart Stephen H director | May 4, 2026 | Award | 791 | — | — | 3.5K | Form 4 ↗ |
LAI GOLDMAN MYLA director | May 4, 2026 | Award | 791 | — | — | 20.4K | Form 4 ↗ |
Keller Deborah L director | May 4, 2026 | Award | 791 | — | — | 11.6K | Form 4 ↗ |
Joseph Molly director | May 4, 2026 | Award | 791 | — | — | 4.4K | Form 4 ↗ |
HAUGEN JANET BRUTSCHEA director | May 4, 2026 | Award | 791 | — | — | 2.4K | Form 4 ↗ |
FRIEL ROBERT F director | May 4, 2026 | Award | 791 | — | — | 5.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
West Pharmaceutical Services, Inc. (WST) is primarily owned by institutional investors, who hold approximately 98.9% of total shares outstanding. Company insiders own approximately 0.64%, while retail and public investors account for the remaining 0.45%.
The largest institutional shareholder of West Pharmaceutical Services, Inc. is VANGUARD GROUP INC, holding approximately 9.23 million shares — equal to 12.73% of outstanding shares — as of March 31, 2025.
A total of 736 institutional investors currently hold WST stock, with a combined institutional value of approximately $15.61 billion as of the most recent 13F filing period.
Frequently asked questions
WST ownershipWest Pharmaceutical Services, Inc. (WST) is primarily owned by institutional investors, who hold approximately 98.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 12.73% stake. Company insiders hold 0.64%. Data sourced from SEC Form 13F as of March 31, 2025.