West Pharmaceutical Services, Inc.
MX ˙ BMV ˙ US9553061055
SecurityMX:WST / West Pharmaceutical Services, Inc.
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership57,287 shares
Latest Disclosed Value $ 14,358,413
Baird Financial Group, Inc. reports 60.82% decrease in ownership of WST / West Pharmaceutical Services, Inc.

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 57,287 shares of West Pharmaceutical Services, Inc. (MX:WST) valued at $14,358,413 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 146,206 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of -60.82% 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)
2026-05-14 2026-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 57,287 -88,919 -60.82 14,358 -64.31 0.0121
2026-02-13 2025-12-31 13F WEST PHARMACEUTICAL SVSC INC COM COMMON 955306105 146,206 24,603 20.23 40,227 26.10 0.0627
2025-11-13 2025-09-30 13F WEST PHARMACEUTICAL SVCS COMMON 955306105 121,603 -32,226 -20.95 31,900 -5.22 0.0513
2025-08-13 2025-06-30 13F WEST PHARMACEUTICAL SVSC INC COM COMMON 955306105 153,829 -11,893 -7.18 33,658 -9.28 0.0590
2025-05-15 2025-03-31 13F WEST PHARMACEUTICAL SVSC INC COM COMMON 955306105 165,722 163,502 7,364.95 37,102 5,003.30 0.0714
2025-02-14 2024-12-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 2,220 188 9.25 727 19.38 0.0014
2024-11-14 2024-09-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 2,032 664 48.54 610 35.33 0.0012
2024-08-14 2024-06-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 1,368 -128 -8.56 451 -23.86 0.0009
2024-05-14 2024-03-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 1,496 925 162.00 592 194.03 0.0012
2024-02-14 2023-12-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 571 -418 -42.26 201 -45.82 0.0005
2023-11-13 2023-09-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 989 -2,636 -72.72 371 -73.23 0.0010
2023-08-11 2023-06-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 3,625 2,169 148.97 1,386 175.00 0.0037
2023-05-15 2023-03-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 1,456 -7,237 -83.25 504 25,100.00 0.0012
2023-02-13 2022-12-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 8,693 998 12.97 2 -99.89 0.0054
2022-11-15 2022-09-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 7,695 1,541 25.04 1,893 1.72 0.0056
2022-08-08 2022-06-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 6,154 1,892 44.39 1,861 6.28 0.0052
2022-05-13 2022-03-31 13F WEST PHARMACEUTICAL SVCS COMMON 955306105 4,262 2,576 152.79 1,751 121.37 0.0043
2022-02-09 2021-12-31 13F WEST PHARMACEUTICAL SVSC INC COM COMMON 955306105 1,686 -7 -0.41 791 10.01 0.0018
2021-11-12 2021-09-30 13F WEST PHARMACEUTICAL SVSC INC COM COMMON 955306105 1,693 461 37.42 719 62.67 0.0018
2021-08-11 2021-06-30 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 1,232 1,232 442 0.0011
2021-05-13 2021-03-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 0 -1,332 -100.00 0 -100.00
2021-02-11 2020-12-31 13F WEST PHARMACEUTICAL SVCS INCCO COMMON 955306105 1,332 1,332 377 0.0011
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.