West Pharmaceutical Services, Inc.
US ˙ NYSE ˙ US9553061055

SecurityWST / West Pharmaceutical Services, Inc.
InstitutionGreenleaf Trust
Latest Disclosed Ownership810 shares
Latest Disclosed Value $ 203,018
Greenleaf Trust reports 5.15% decrease in ownership of WST / West Pharmaceutical Services, Inc.

On April 27, 2026 - Greenleaf Trust filed a 13F-HR form disclosing ownership of 810 shares of West Pharmaceutical Services, Inc. (US:WST) valued at $203,018 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 854 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of -5.15% during the quarter. The current value of the position is $256,211 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)
2026-04-27 2026-03-31 13F W Pharmaceutical Services Com 955306105 810 -44 -5.15 203 -13.25 0.0011
2026-01-21 2025-12-31 13F W Pharmaceutical Services Com 955306105 854 20 2.40 235 7.34 0.0022
2025-10-22 2025-09-30 13F W Pharmaceutical Services Com 955306105 834 834 219 0.0020
2025-04-30 2025-03-31 13F W Pharmaceutical Services COM 955306105 0 -1,210 -100.00 0 -100.00
2025-01-24 2024-12-31 13F W Pharmaceutical Services COM 955306105 1,210 156 14.80 396 25.32 0.0036
2024-10-22 2024-09-30 13F W Pharmaceutical Services COM 955306105 1,054 -22 -2.04 316 -10.73 0.0028
2024-07-22 2024-06-30 13F W Pharmaceutical Services COM 955306105 1,076 -84 -7.24 354 -22.88 0.0034
2024-04-29 2024-03-31 13F W Pharmaceutical Services COM 955306105 1,160 7 0.61 459 13.33 0.0043
2024-01-31 2023-12-31 13F W Pharmaceutical Services COM 955306105 1,153 -386 -25.08 406 -29.81 0.0044
2023-11-09 2023-09-30 13F W Pharmaceutical Services COM 955306105 1,539 -32 -2.04 577 -3.83 0.0067
2023-08-09 2023-06-30 13F W Pharmaceutical Services COM 955306105 1,571 15 0.96 601 11.32 0.0064
2023-05-11 2023-03-31 13F W Pharmaceutical Services COM 955306105 1,556 307 24.58 539 0.0061
2023-01-25 2022-12-31 13F W Pharmaceutical Services COM 955306105 1,249 108 9.47 0 -100.00 0.0037
2022-11-10 2022-09-30 13F W Pharmaceutical Services COM 955306105 1,141 -133 -10.44 281 -27.01 0.0042
2022-08-12 2022-06-30 13F W Pharmaceutical Services COM 955306105 1,274 -1 -0.08 385 -26.53 0.0058
2022-04-27 2022-03-31 13F W Pharmaceutical Services COM 955306105 1,275 -1 -0.08 524 -12.37 0.0063
2022-02-11 2021-12-31 13F W Pharmaceutical Services COM 955306105 1,276 5 0.39 598 10.74 0.0070
2021-11-12 2021-09-30 13F W Pharmaceutical Services COM 955306105 1,271 61 5.04 540 24.14 0.0066
2021-08-10 2021-06-30 13F W Pharmaceutical Services COM 955306105 1,210 -782 -39.26 435 -22.46 0.0054
2021-04-30 2021-03-31 13F W Pharmaceutical Services COM 955306105 1,992 128 6.87 561 6.25 0.0074
2021-02-08 2020-12-31 13F W Pharmaceutical Services COM 955306105 1,864 14 0.76 528 3.73 0.0070
2020-10-30 2020-09-30 13F W Pharmaceutical Services COM 955306105 1,850 873 89.36 509 129.28 0.0079
2020-08-12 2020-06-30 13F W Pharmaceutical Services COM 955306105 977 977 222 0.0039
2018-08-07 2018-06-30 13F W Pharmaceutical Services COM 955306105 0 -349 -100.00 0 -100.00
2018-04-30 2018-03-31 13F W Pharmaceutical Services COM 955306105 349 0 0.00 31 -8.82 0.0006
2018-02-08 2017-12-31 13F W Pharmaceutical Services COM 955306105 349 0 0.00 34 0.00 0.0007
2017-11-13 2017-09-30 13F W Pharmaceutical Services COM 955306105 349 349 34 0.0007
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.