West Pharmaceutical Services, Inc.
DE ˙ DB ˙ GB00BLGXWY71
269,50 € ↑3,00 (1,13%)
2026-06-04
DEL PRIS
SecurityDE:WPS / West Pharmaceutical Services, Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership1,852 shares
Latest Disclosed Value $ 464,185
Vestmark Advisory Solutions, Inc. reports 49.59% decrease in ownership of WPS / West Pharmaceutical Services, Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 1,852 shares of West Pharmaceutical Services, Inc. (DE:WPS) valued at $395,402 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 3,674 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of -49.59% during the quarter. The current value of the position is $499,114 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,852 -1,822 -49.59 464 -54.06 0.0032
2026-02-06 2025-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 3,674 2,545 225.42 1,011 241.22 0.0136
2025-11-10 2025-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,129 -134 -10.61 296 7.25 0.0056
2025-08-06 2025-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,263 -1,547 -55.05 276 -56.12 0.0040
2025-05-13 2025-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,810 1,172 71.55 629 17.35 0.0162
2025-02-06 2024-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,638 214 15.03 537 25.53 0.0185
2024-11-14 2024-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,424 265 22.86 427 12.07 0.0159
2024-08-12 2024-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,159 -104 -8.23 382 -23.65 0.0159
2024-05-15 2024-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,263 26 2.10 500 14.71 0.0215
2024-02-06 2023-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,237 417 50.85 436 41.69 0.0221
2023-11-06 2023-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 820 -7,692 -90.37 308 -90.57 0.0224
2023-08-07 2023-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 8,512 1 0.01 3,256 10.38 0.1240
2023-05-09 2023-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 8,511 1,972 30.16 2,949 91.62 0.1277
2023-01-20 2022-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 6,539 134 2.09 1,539 -2.35 0.0750
2022-11-03 2022-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 6,405 424 7.09 1,576 -12.83 0.0878
2022-08-04 2022-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,981 243 4.23 1,808 -23.29 0.1033
2022-04-27 2022-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,738 694 13.76 2,357 -0.38 0.1334
2022-01-31 2021-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,044 210 4.34 2,366 15.30 0.1335
2021-11-15 2021-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,834 537 12.50 2,052 32.99 0.1390
2021-08-09 2021-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,297 270 6.70 1,543 35.95 0.1098
2021-05-10 2021-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,027 1,074 36.37 1,135 35.60 0.1007
2021-02-04 2020-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,953 337 12.88 837 16.41 0.0939
2020-10-19 2020-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,616 208 8.64 719 31.44 0.0966
2020-08-13 2020-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,408 307 14.61 547 70.94 0.0846
2020-05-06 2020-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,101 2,101 320 0.0626
2020-02-14 2019-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -2,126 -100.00 0 -100.00
2019-11-05 2019-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,126 -12 -0.56 302 12.69 0.0490
2019-08-20 2019-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,138 246 13.00 268 28.85 0.0459
2019-05-14 2019-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,892 1,892 208 0.0371
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.