West Pharmaceutical Services, Inc.
MX ˙ BMV ˙ US9553061055
SecurityMX:WST / West Pharmaceutical Services, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership27,864 shares
Latest Disclosed Value $ 6,983,837
First Trust Advisors Lp reports 88.47% increase in ownership of WST / West Pharmaceutical Services, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 27,864 shares of West Pharmaceutical Services, Inc. (MX:WST) valued at $6,983,837 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 14,784 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of 88.47% 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)
2026-05-13 2026-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 27,864 13,080 88.47 6,984 71.70 0.0050
2026-02-13 2025-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 14,784 -11,726 -44.23 4,068 -41.52 0.0030
2025-11-12 2025-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 26,510 -19,822 -42.78 6,954 -31.40 0.0052
2025-08-13 2025-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 46,332 29,067 168.36 10,137 162.28 0.0082
2025-05-14 2025-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 17,265 -24,408 -58.57 3,865 -71.68 0.0034
2025-02-13 2024-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 41,673 26,539 175.36 13,650 200.53 0.0120
2024-11-13 2024-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 15,134 15,134 4,543 0.0043
2024-05-13 2024-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -51,531 -100.00 0 -100.00
2024-02-13 2023-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 51,531 -2,546 -4.71 18,145 -10.57 0.0198
2023-11-13 2023-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 54,077 6,648 14.02 20,290 11.85 0.0240
2023-08-14 2023-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 47,429 44,197 1,367.48 18,140 1,521.09 0.0206
2023-05-15 2023-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 3,232 3,232 1,120 0.0013
2023-02-09 2022-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -5,770 -100.00 0 -100.00
2022-11-14 2022-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 5,770 -70,231 -92.41 1,420 -93.82 0.0018
2022-08-12 2022-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 76,001 -24,638 -24.48 22,980 -44.40 0.0284
2022-05-13 2022-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 100,639 -14,039 -12.24 41,333 -23.15 0.0423
2022-02-08 2021-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 114,678 -10,292 -8.24 53,785 1.38 0.0523
2021-11-15 2021-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 124,970 83,892 204.23 53,055 260.50 0.0571
2021-10-12 2021-06-30 13F/A-1 WEST PHARMACEUTICAL SVSC COM 955306105 41,078 -33,412 -44.85 14,717 -29.89 0.0159
2021-08-16 2021-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 50,883 -23,607 18,272 0.0188
2021-05-14 2021-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 74,490 -61,906 -45.39 20,990 -45.68 0.0254
2021-02-02 2020-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 136,396 -45,791 -25.13 38,642 -22.84 0.0512
2020-11-05 2020-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 182,187 -29,497 -13.93 50,083 4.15 0.0802
2020-07-22 2020-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 211,684 9,128 4.51 48,088 55.93 0.0834
2020-05-06 2020-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 202,556 -5,419 -2.61 30,839 -1.36 0.0699
2020-02-03 2019-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 207,975 52,820 34.04 31,265 42.09 0.0534
2019-11-04 2019-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 155,155 103,619 201.06 22,004 241.15 0.0414
2019-07-30 2019-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 51,536 -58,783 -53.28 6,450 -46.94 0.0122
2019-06-19 2019-03-31 13F/A-1 WEST PHARMACEUTICAL SVSC COM 955306105 110,319 -185,864 -62.75 12,157 -58.13 0.0242
2019-05-09 2019-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 110,319 -185,864 12,157
2019-02-07 2018-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 296,183 235,347 386.85 29,035 286.57 0.0688
2018-10-25 2018-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 60,836 60,836 7,511 0.0140
2018-08-02 2018-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -51,443 -100.00 0 -100.00
2018-04-23 2018-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 51,443 -55,671 -51.97 4,542 -57.03 0.0104
2018-02-08 2017-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 107,114 -13,651 -11.30 10,569 -9.08 0.0252
2017-10-24 2017-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 120,765 58,875 95.13 11,625 98.72 0.0299
2017-08-02 2017-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 61,890 -192,283 -75.65 5,850 -71.80 0.0156
2017-05-02 2017-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 254,173 132,915 109.61 20,743 101.66 0.0575
2017-02-06 2016-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 121,258 -174,016 -58.93 10,286 -53.24 0.0306
2016-11-01 2016-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 295,274 260,496 749.03 21,998 733.57 0.0657
2016-08-04 2016-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 34,778 1,015 3.01 2,639 12.78 0.0083
2016-05-10 2016-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 33,763 9,182 37.35 2,340 58.11 0.0075
2016-05-04 2015-12-31 13F/A-1 WEST PHARMACEUTICAL SVSC COM 955306105 24,581 12,560 104.48 1,480 127.34 0.0038
2016-02-03 2015-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 24,581 1,480
2015-11-05 2015-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 12,021 -23,142 -65.81 651 -68.12 0.0019
2015-08-04 2015-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 35,163 12,407 54.52 2,042 49.05 0.0053
2015-05-04 2015-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 22,756 -13,132 -36.59 1,370 -28.31 0.0040
2015-02-13 2014-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 35,888 35,888 0.00 1,911 0.0064
2014-11-12 2014-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 0 -11,123 -100.00 0 -100.00
2014-08-11 2014-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 11,123 -28,842 -72.17 469 -73.35 0.0019
2014-05-12 2014-03-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 39,965 11,652 41.15 1,760 26.71 0.0077
2014-08-08 2013-12-31 13F/A-1 WEST PHARMACEUTICAL SVSC COM 955306105 28,313 6,731 31.19 1,389 56.42 0.0067
2014-02-13 2013-12-31 13F WEST PHARMACEUTICAL SVSC COM 955306105 28,313 1,389
2013-11-12 2013-09-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 21,582 11,968 124.49 888 31.56 0.0048
2013-08-12 2013-06-30 13F WEST PHARMACEUTICAL SVSC COM 955306105 9,614 9,614 675 0.0044
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.