WST
West Pharmaceutical Services, Inc. · Healthcare · Medical - Instruments & Supplies
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 162 | +3 | 50.43M | $18.09B | +8 | −4 |
| Q1 2026 | 161 | -2 | 49.75M | $12.46B | +4 | −7 |
| Q4 2025 | 162 | +3 | 53.70M | $14.74B | +5 | −1 |
| Q3 2025 | 21 | -1 | 26.99M | $7.08B | — | −2 |
| Q2 2025 | 20 | 0 | 24.84M | $5.43B | +1 | −1 |
| Q1 2025 | 17 | +2 | 8.37M | $1.87B | +2 | — |
| Q4 2024 | 15 | +2 | 8.55M | $2.80B | +2 | — |
| Q3 2024 | 12 | -1 | 4.43M | $1.33B | — | −1 |
| Q2 2024 | 13 | — | 5.33M | $1.75B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Geode Capital Management ✦ (passive) | 1.73M | — | $567.45M | 0.1% | n/c | 1 | SEC ↗ ×2 |
| 2 | T. Rowe Price ✦ | 1.69M | — | $557.93M | 0.1% | n/c | 1 | SEC ↗ ×2 |
| 3 | Norges Bank ✦ (passive) | 866.37K | — | $285.37M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Millennium Management ✦ | 393.86K | — | $129.73M | 0.1% | n/c | 1 | SEC ↗ |
| 5 | Citadel Advisors ✦ | 280.34K | — | $92.34M | 0.1% | n/c | 1 | SEC ↗ ×2 |
| 6 | Adage Capital Partners ✦ | 169.91K | — | $55.97M | 0.1% | n/c | 1 | SEC ↗ |
| 7 | Two Sigma Investments ✦ | 82.38K | — | $27.14M | 0.1% | n/c | 1 | SEC ↗ |
| 8 | Marshall Wace ✦ | 47.98K | — | $15.80M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 9 | Fisher Asset Management ✦ | 28.77K | — | $9.48M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 17.55K | — | $5.78M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 11 | D. E. Shaw & Co. ✦ | 15.24K | — | $5.02M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 12 | Wellington Management ✦ | 5.76K | — | $1.90M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 13 | Gotham Asset Management ✦ | 2.11K | — | $694,684 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 749 holders, 70.07M shares, $16.37B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 2.52K sh · $921,260
Officer · 2.50K sh · $887,500
Officer · 2.50K sh · $862,500
Officer · 2.82K sh · $960,062
Officer · 2.82K sh · $960,403
Officer · 2.50K sh · $852,025
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology