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 Sep 30, 2025
Ownership Breakdown
775
Institutional Holders
▲ 25 vs Q2
$18.06B
Total Inst. Value
▲ $2.78B vs Q2
70.65M
Shares Outstanding
freeFloat 99.36%
69.19M
13F Shares Held
▼ 859,239 vs Q2
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
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC fabricated rubber products, nec | 9.70M | 13.42% | 13.42% | $2.55T | Nov 7, 2025 | ▲ 388.1K |
BLACKROCK, INC. fabricated rubber products, nec | 6.46M | 8.93% | 8.93% | $1.69T | Nov 12, 2025 | ▼ 149.1K |
STATE STREET CORP fabricated rubber products, nec | 3.21M | 4.44% | 4.44% | $841.53B | Nov 14, 2025 | ▼ 64.0K |
BANK OF NEW YORK MELLON CORP fabricated rubber products, nec | 2.90M | 4.02% | 4.02% | $761.99B | Nov 3, 2025 | ▼ 301.7K |
ARTISAN PARTNERS LIMITED PARTNERSHIP fabricated rubber products, nec | 2.77M | 3.83% | 3.83% | $726.90B | Nov 12, 2025 | ▲ 503.6K |
BROWN ADVISORY INC fabricated rubber products, nec | 2.50M | 3.46% | 3.46% | $655.33B | Nov 14, 2025 | ▼ 523.2K |
GEODE CAPITAL MANAGEMENT, LLC fabricated rubber products, nec | 1.86M | 2.57% | 2.57% | $485.20B | Nov 12, 2025 | ▲ 24.1K |
MORGAN STANLEY fabricated rubber products, nec | 1.48M | 2.05% | 2.05% | $387.89B | May 27, 2026 | ▼ 6.5K |
VAN ECK ASSOCIATES CORP fabricated rubber products, nec | 1.42M | 1.97% | 1.97% | $373.79B | Nov 13, 2025 | ▼ 61.3K |
APG ASSET MANAGEMENT N.V. fabricated rubber products, nec | 1.41M | 1.96% | 1.96% | $315.62B | Nov 12, 2025 | ▼ 245.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
19
Increased
+3.30M shares2
New Positions
first time holders26
Decreased
−2.80M shares0
Sold Out
fully exitedNet shares change (top 50)
+502.5K
+3.30M / −2.80M
Net new holders
-5
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 97.9% of total shares outstanding. Company insiders own approximately 0.64%, while retail and public investors account for the remaining 1.42%.
The largest institutional shareholder of West Pharmaceutical Services, Inc. is VANGUARD GROUP INC, holding approximately 9.70 million shares — equal to 13.42% of outstanding shares — as of September 30, 2025.
A total of 775 institutional investors currently hold WST stock, with a combined institutional value of approximately $18.06 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 97.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 13.42% stake. Company insiders hold 0.64%. Data sourced from SEC Form 13F as of September 30, 2025.