West Pharmaceutical Services, Inc.
MX ˙ BMV ˙ US9553061055
SecurityMX:WST / West Pharmaceutical Services, Inc.
InstitutionCIBC Asset Management Inc
Latest Disclosed Ownership17,222 shares
Latest Disclosed Value $ 4,316,522
CIBC Asset Management Inc reports 1.57% increase in ownership of WST / West Pharmaceutical Services, Inc.

On May 12, 2026 - CIBC Asset Management Inc filed a 13F-HR form disclosing ownership of 17,222 shares of West Pharmaceutical Services, Inc. (MX:WST) valued at $4,316,522 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 16,956 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of 1.57% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 17,222 266 1.57 4,317 -7.48 0.0105
2026-02-10 2025-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 16,956 6,915 68.87 4,665 77.11 0.0113
2025-10-31 2025-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,041 8 0.08 2,634 20.00 0.0076
2025-08-14 2025-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,033 -897 -8.21 2,195 -10.30 0.0068
2025-05-13 2025-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,930 -128 -1.16 2,447 -32.44 0.0081
2025-01-31 2024-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,058 477 4.51 3,622 14.08 0.0119
2024-11-06 2024-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,581 762 7.76 3,176 -1.82 0.0103
2024-08-01 2024-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,819 -655 -6.25 3,234 -21.96 0.0115
2024-05-09 2024-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,474 316 3.11 4,145 15.88 0.0144
2024-02-13 2023-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,158 -451 -4.25 3,577 -10.15 0.0134
2023-10-30 2023-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,609 30 0.28 3,981 -1.63 0.0165
2023-08-14 2023-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,579 -105 -0.98 4,046 9.32 0.0155
2023-05-12 2023-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,684 228 2.18 3,702 50.45 0.0147
2023-02-13 2022-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 10,456 727 7.47 2,461 2.76 0.0103
2022-11-03 2022-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,729 736 8.18 2,394 -11.95 0.0105
2022-08-09 2022-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 8,993 -2,821 -23.88 2,719 -43.96 0.0110
2022-05-06 2022-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,814 -2,251 -16.00 4,852 -26.45 0.0170
2022-02-08 2021-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 14,065 286 2.08 6,597 12.77 0.0241
2021-11-09 2021-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 13,779 -414 -2.92 5,850 14.77 0.0236
2021-08-16 2021-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 14,193 1,091 8.33 5,097 38.06 0.0206
2021-05-14 2021-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 13,102 678 5.46 3,692 4.89 0.0157
2021-02-03 2020-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 12,424 455 3.80 3,520 6.99 0.0166
2020-11-05 2020-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,969 5,681 90.35 3,290 130.39 0.0168
2020-07-28 2020-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 6,288 3,577 131.94 1,428 245.76 0.0084
2020-04-30 2020-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,711 0 0.00 413 1.23 0.0029
2020-02-14 2019-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,711 71 2.69 408 9.09 0.0023
2019-10-30 2019-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,640 0 0.00 374 13.33 0.0022
2019-08-05 2019-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,640 0 0.00 330 13.40 0.0020
2019-05-06 2019-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,640 0 0.00 291 12.36 0.0018
2019-02-12 2018-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,640 0 0.00 259 -20.55 0.0019
2018-11-02 2018-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,640 0 0.00 326 24.43 0.0020
2018-08-09 2018-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,640 172 6.97 262 20.18 0.0016
2018-04-30 2018-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,468 0 0.00 218 -10.66 0.0014
2018-02-02 2017-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,468 0 0.00 244 2.52 0.0015
2017-11-06 2017-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,468 106 4.49 238 6.73 0.0015
2017-07-27 2017-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,362 2,362 223 0.0015
2017-05-12 2017-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -2,362 -100.00 0 -100.00
2017-02-08 2016-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 2,362 2,362 200 0.0014
2016-05-09 2016-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 0 0 0.0000
2016-02-02 2015-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 0 0 0.0000
2015-11-03 2015-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -4,954 -100.00 0 -100.00
2015-08-06 2015-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,954 8 0.16 288 -3.36 0.0020
2015-05-08 2015-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,946 131 2.72 298 16.41 0.0021
2015-02-10 2014-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 4,815 4,815 256 0.0017
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.