WST
West Pharmaceutical Services, Inc. · Healthcare · Medical - Instruments & Supplies
Momentum inputs (comparable managers):
holder breadth +15.4% ·
share flow +11.4% ·
net new positions +13.3%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 160 | +3 | 50.04M | $17.95B | +8 | −6 |
| 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 | n/a | −2 |
| Q2 2025 | 20 | 0 | 24.84M | $5.43B | +1 | −1 |
| Q1 2025 | 17 | +2 | 8.37M | $1.87B | +2 | n/a |
| Q4 2024 | 15 | +2 | 8.55M | $2.80B | +2 | n/a |
| Q3 2024 | 12 | -1 | 4.43M | $1.33B | n/a | −1 |
| Q2 2024 | 13 | n/a | 5.33M | $1.75B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 3.25M | n/a | $1.06B | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 1.78M | +2.2% | $581.21M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 3 | Norges Bank ✦ (passive) | 887.18K | +2.5% | $290.60M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 670.88K | +1294.0% | $219.75M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 525.32K | -58.4% | $172.07M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 6 | D. E. Shaw & Co. ✦ | 425.92K | +5277.7% | $139.51M | 0.2% | ▲ Add | 3 | SEC ↗ ×2 |
| 7 | Adage Capital Partners ✦ | 242.71K | +36.0% | $79.50M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 8 | Marshall Wace ✦ | 227.26K | +77.2% | $74.44M | 0.1% | ▲ Add | 3 | SEC ↗ ×3 |
| 9 | Millennium Management ✦ | 219.62K | New | $71.94M | 0.1% | New | 1 | SEC ↗ |
| 10 | Point72 Asset Management ✦ | 202.47K | New | $66.32M | 0.2% | New | 1 | SEC ↗ |
| 11 | Two Sigma Investments ✦ | 75.99K | -47.5% | $24.89M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 12 | Fisher Asset Management ✦ | 28.74K | 0.0% | $9.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 10.98K | -28.1% | $3.60M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 14 | Wellington Management ✦ | 6.66K | +1.5% | $2.18M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 15 | Gotham Asset Management ✦ | 2.16K | 0.0% | $708,185 | 0.0% | Held | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Millennium Management | $71.94M | 0.1% |
| Point72 Asset Management | $66.32M | 0.2% |
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