West Pharmaceutical Services, Inc.
MX ˙ BMV ˙ US9553061055
SecurityMX:WST / West Pharmaceutical Services, Inc.
InstitutionHighTower Advisors, LLC
Latest Disclosed Ownership5,220 shares
Latest Disclosed Value $ 1,308,276
HighTower Advisors, LLC reports 5.07% decrease in ownership of WST / West Pharmaceutical Services, Inc.

On May 5, 2026 - HighTower Advisors, LLC filed a 13F-HR form disclosing ownership of 5,220 shares of West Pharmaceutical Services, Inc. (MX:WST) valued at $1,308,276 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 5,499 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of -5.07% during the quarter.

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)
2026-05-05 2026-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,220 -279 -5.07 1,308 -13.55 0.0014
2026-02-06 2025-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,499 -1,070 -16.29 1,513 -12.19 0.0017
2025-11-07 2025-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 6,569 -2,249 -25.50 1,724 -10.68 0.0020
2025-08-11 2025-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 8,818 -1,369 -13.44 1,929 -15.39 0.0024
2025-05-13 2025-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,187 -163 -1.57 2,281 -32.74 0.0031
2025-02-07 2024-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,350 1,812 21.22 3,390 31.34 0.0046
2024-11-14 2024-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 8,538 -963 -10.14 2,581 -17.57 0.0037
2024-08-13 2024-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,501 282 3.06 3,131 -14.31 0.0048
2024-05-06 2024-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,219 -145 -1.55 3,654 11.23 0.0059
2024-02-12 2023-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,364 -1,774 -15.93 3,285 -22.01 0.0055
2023-11-08 2023-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,138 -436 -3.77 4,212 -5.24 0.0079
2023-08-14 2023-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,574 59 0.51 4,445 11.74 0.0087
2023-05-12 2023-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,515 972 9.22 3,978 60.60 0.0087
2023-02-09 2022-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,543 1,057 11.14 2,477 7.18 0.0057
2022-11-09 2022-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,486 -48 -0.50 2,311 -19.95 0.0062
2022-08-10 2022-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,534 -1,218 -11.33 2,887 -34.70 0.0075
2022-05-12 2022-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,752 -4,525 -29.62 4,421 -38.36 0.0099
2022-02-10 2021-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 15,277 5,453 55.51 7,172 71.87 0.0157
2021-11-12 2021-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,824 1,589 19.30 4,173 40.93 0.0112
2021-08-06 2021-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 8,235 966 13.29 2,961 44.23 0.0086
2021-05-10 2021-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 7,269 7,269 2,053 0.0065
2021-02-10 2020-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -7,309 -100.00 0 -100.00
2020-11-13 2020-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 7,309 2,541 53.29 1,998 86.03 0.0096
2020-08-10 2020-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,768 454 10.52 1,074 63.22 0.0059
2020-05-21 2020-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,314 210 5.12 658 5.79 0.0043
2020-02-14 2019-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,104 -1,054 -20.43 622 -14.68 0.0037
2019-11-12 2019-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,158 53 1.04 729 13.55 0.0040
2019-08-13 2019-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,105 372 7.86 642 24.66 0.0038
2019-05-15 2019-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,733 444 10.35 515 21.75 0.0034
2019-02-14 2018-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,289 1,489 53.18 423 23.32 0.0032
2018-11-09 2018-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,800 2,800 343 0.0025
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.