Security record · archived quarter
WST
West Pharmaceutical Services, Inc. · Healthcare · Medical - Instruments & Supplies
161Tracked holders
-2Δ holders
49.75MShares held
$12.46BReported value
+4New positions
−7Exits
Momentum inputs (comparable managers):
holder breadth -1.2% ·
share flow +3.6% ·
net new positions -1.9%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 162 | +3 | 50.44M | $18.07B | +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 | — | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | BlackRock ✦ (passive) | 6.84M | +3.6% | $1.71B | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | Vanguard Capital Management Llc | 4.68M | — | $1.17B | 0.0% | n/c | 1 | SEC ↗ |
| 23 | State Street Global Advisors ✦ (passive) | 3.29M | +1.3% | $825.55M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 24 | Artisan Partners Limited Partnership | 2.66M | -6.8% | $666.17M | 1.1% | ▼ Trim | 2 | SEC ↗ |
| 25 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 26 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 27 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 28 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 29 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 30 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 31 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 32 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 33 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 34 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 35 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 36 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 37 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 38 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 39 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 40 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 41 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 42 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 43 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 44 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 45 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 46 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 47 | Bank of New York Mellon Corp | 2.47M | -7.4% | $618.04M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 48 | Geode Capital Management ✦ (passive) | 1.91M | +2.3% | $477.53M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 49 | Geode Capital Management ✦ (passive) | 1.91M | +2.3% | $477.53M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 50 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 51 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 52 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 53 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 54 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 55 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 56 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 57 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 60 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 62 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 63 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 64 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 66 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 68 | Morgan Stanley ✦ | 1.46M | -4.8% | $365.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 69 | Brown Advisory Inc | 1.34M | -31.0% | $336.08M | 0.6% | ▼ Trim | 2 | SEC ↗ |
| 70 | Brown Advisory Inc | 1.34M | -31.0% | $336.08M | 0.6% | ▼ Trim | 2 | SEC ↗ |
| 71 | Brown Advisory Inc | 1.34M | -31.0% | $336.08M | 0.6% | ▼ Trim | 2 | SEC ↗ |
| 72 | Brown Advisory Inc | 1.34M | -31.0% | $336.08M | 0.6% | ▼ Trim | 2 | SEC ↗ |
| 73 | Fidelity (FMR) ✦ | 1.25M | +1039.7% | $313.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 74 | Fidelity (FMR) ✦ | 1.25M | +1039.7% | $313.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 75 | Fidelity (FMR) ✦ | 1.25M | +1039.7% | $313.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 76 | Fidelity (FMR) ✦ | 1.25M | +1039.7% | $313.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 77 | Fidelity (FMR) ✦ | 1.25M | +1039.7% | $313.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 78 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 80 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 82 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 85 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 86 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 87 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 89 | Invesco Ltd. | 1.06M | +16.2% | $264.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 91 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 92 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 93 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 94 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 95 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 96 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 97 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 98 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 99 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 100 | JPMorgan Chase ✦ | 1.04M | +279.5% | $255.78M | 0.0% | ▲ Add | 3 | 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
| Norges Bank | $272.04M | was 0.0% |
| Hrt Financial Lp | $34.99M | was 0.1% |
| Jennison Associates Llc | $15.02M | was 0.0% |
| Parnassus Investments, Llc | $9.46M | was 0.0% |
| Nomura Holdings Inc | $227,541 | was 0.0% |
| Walleye Trading LLC | $182,418 | was 0.0% |
| Group One Trading Llc | $108,130 | was 0.0% |
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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Aug 06
SC 13G — FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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