West Pharmaceutical Services, Inc.
US ˙ NYSE ˙ US9553061055

SecurityWST / West Pharmaceutical Services, Inc.
InstitutionAlps Advisors Inc
Latest Disclosed Ownership2,105 shares
Latest Disclosed Value $ 527,597
Alps Advisors Inc reports 15.98% increase in ownership of WST / West Pharmaceutical Services, Inc.

On May 8, 2026 - Alps Advisors Inc filed a 13F-HR form disclosing ownership of 2,105 shares of West Pharmaceutical Services, Inc. (US:WST) valued at $527,597 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,815 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of 15.98% during the quarter. The current value of the position is $665,833 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)
2026-05-08 2026-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,105 290 15.98 528 5.61 0.0023
2026-02-12 2025-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,815 15 0.83 499 5.72 0.0029
2025-11-05 2025-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,800 1,800 472 0.0026
2024-11-12 2024-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -968 -100.00 0 -100.00
2024-08-13 2024-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 968 -2 -0.21 319 -16.97 0.0022
2024-05-14 2024-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 970 970 384 0.0027
2023-11-14 2023-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -1,009 -100.00 0 -100.00
2023-08-14 2023-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,009 5 0.50 386 10.95 0.0034
2023-05-10 2023-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,004 -71 -6.60 348 37.15 0.0031
2023-02-14 2022-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,075 -10 -0.92 253 -5.24 0.0023
2022-11-14 2022-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,085 190 21.23 267 -1.48 0.0025
2022-08-15 2022-06-30 13F/A-1 WEST PHARMACEUTICAL SVSC COM 955306105 895 895 271 0.0026
2022-08-11 2022-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 895 895 271 0.0026
2022-05-13 2022-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -820 -100.00 0 -100.00
2022-02-09 2021-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 820 16 1.99 385 12.90 0.0043
2021-11-15 2021-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 804 -433 -35.00 341 -23.20 0.0033
2021-08-11 2021-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,237 0 0.00 444 27.22 0.0039
2021-05-07 2021-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,237 307 33.01 349 32.70 0.0034
2021-02-03 2020-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 930 -19 -2.00 263 0.77 0.0030
2020-11-05 2020-09-30 13F/A-1 WEST PHARMACEUTICAL SVSC COM 955306105 949 -467 -32.98 261 -18.94 0.0038
2020-11-04 2020-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 949 -467 261 3,345.0277
2020-08-05 2020-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,416 -156 -9.92 322 34.73 0.0043
2020-05-06 2020-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 1,572 -870 -35.63 239 -34.88 0.0037
2020-02-07 2019-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,442 -105 -4.12 367 1.66 0.0029
2019-11-04 2019-09-30 13F WEST PHARMACEUT COMMON STOCK 955306105 2,547 2,547 361 0.0028
2019-02-04 2018-12-31 13F WEST PHARMACEUT COMMON STOCK 955306105 0 -1,886 -100.00 0 -100.00
2018-10-25 2018-09-30 13F WEST PHARMACEUT COMMON STOCK 955306105 1,886 -202 -9.67 233 13.11 0.0015
2018-07-31 2018-06-30 13F/A-1 West Pharmaceutical Services I COMMON STOCK 955306105 2,088 2,088 206 0.0013
2018-07-25 2018-06-30 13F West Pharmaceutical Services I COMMON STOCK 955306105 2,088 2,088 206
2018-05-01 2018-03-31 13F West Pharmaceutical Services I COMMON STOCK 955306105 0 -2,088 -100.00 0 -100.00
2018-02-20 2017-12-31 13F/A-1 West Pharmaceutical Services I COMMON STOCK 955306105 2,088 2,088 206 0.0014
2018-02-05 2017-12-31 13F West Pharmaceutical Services I COMMON STOCK 955306105 2,088 206 0.0014
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.