West Pharmaceutical Services, Inc.
MX ˙ BMV ˙ US9553061055
SecurityMX:WST / West Pharmaceutical Services, Inc.
InstitutionPier Capital, LLC
Latest Disclosed Ownership18 shares
Latest Disclosed Value $ 4,512
Pier Capital, LLC ownership in WST / West Pharmaceutical Services, Inc.

On May 14, 2026 - Pier Capital, LLC filed a 13F-HR form disclosing ownership of 18 shares of West Pharmaceutical Services, Inc. (MX:WST) valued at $4,512 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 18 shares of West Pharmaceutical Services, Inc.. This represents a change in shares of 0.00% 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)
2026-05-14 2026-03-31 13F West Pharmaceutical Services COM 955306105 18 0 0.00 5 0.00 0.0007
2026-02-03 2025-12-31 13F West Pharmaceutical Services I COM 955306105 18 -36 -66.67 5 -71.43 0.0008
2025-11-13 2025-09-30 13F West Pharmaceutical Services I COM 955306105 54 0 0.00 14 27.27 0.0022
2025-08-05 2025-06-30 13F West Pharmaceutical Services I COM 955306105 54 -2,919 -98.18 12 -98.35 0.0018
2025-05-13 2025-03-31 13F West Pharmaceutical Services I COM 955306105 2,973 420 16.45 666 -20.45 0.1115
2025-02-11 2024-12-31 13F West Pharmaceutical Services I COM 955306105 2,553 440 20.82 836 31.86 0.1193
2024-11-15 2024-09-30 13F West Pharmaceutical Services I COM 955306105 2,113 471 28.68 634 17.41 0.0894
2024-08-07 2024-06-30 13F West Pharmaceutical Services I Common Stocks 955306105 1,642 53 3.34 541 -14.01 0.0805
2024-05-03 2024-03-31 13F West Pharmaceutical Services I Common Stocks 955306105 1,589 22 1.40 629 13.97 0.0865
2024-02-15 2023-12-31 13F West Pharmaceutical Services I Common Stocks 955306105 1,567 528 50.82 552 41.65 0.0789
2023-11-14 2023-09-30 13F West Pharmaceutical Services I Common Stocks 955306105 1,039 -22 -2.07 390 -3.95 0.0628
2023-08-14 2023-06-30 13F West Pharmaceutical Services I Common Stocks 955306105 1,061 1,061 406 0.0582
2019-08-14 2019-06-30 13F West Pharmaceutical Services I COM 955306105 0 -84,506 -100.00 0 -100.00
2019-04-24 2019-03-31 13F West Pharmaceutical Services I COM 955306105 84,506 54,946 185.88 9,313 221.36 1.4448
2019-02-13 2018-12-31 13F West Pharmaceutical Services I COM 955306105 29,560 -41,993 -58.69 2,898 -67.20 0.5751
2018-11-14 2018-09-30 13F West Pharmaceutical Services I COM 955306105 71,553 1,217 1.73 8,835 26.50 1.1149
2018-08-08 2018-06-30 13F West Pharmaceutical Services COM 955306105 70,336 8,676 14.07 6,984 28.29 0.9607
2018-05-14 2018-03-31 13F West Pharmaceutical Services COM 955306105 61,660 937 1.54 5,444 -9.15 0.9304
2018-02-15 2017-12-31 13F West Pharmaceutical Services COM 955306105 60,723 -1,059 -1.71 5,992 0.76 1.0241
2017-11-13 2017-09-30 13F West Pharmaceutical Services COM 955306105 61,782 917 1.51 5,947 3.37 1.0314
2017-08-09 2017-06-30 13F West Pharmaceutical Services COM 955306105 60,865 -3,536 -5.49 5,753 9.46 0.9931
2017-05-10 2017-03-31 13F West Pharmaceutical Services COM 955306105 64,401 -583 -0.90 5,256 -4.66 0.8986
2017-02-14 2016-12-31 13F West Pharmaceutical Services COM 955306105 64,984 -1,944 -2.90 5,513 10.57 0.9967
2016-11-14 2016-09-30 13F West Pharmaceutical Services COM 955306105 66,928 -35,154 -34.44 4,986 -35.63 0.8841
2016-08-15 2016-06-30 13F West Pharmaceutical Services COM 955306105 102,082 -3,351 -3.18 7,746 5.98 1.4115
2016-05-05 2016-03-31 13F West Pharmaceutical Services COM 955306105 105,433 -12,380 -10.51 7,309 3.02 1.4082
2016-02-12 2015-12-31 13F West Pharmaceutical Services COM 955306105 117,813 -2,396 -1.99 7,095 9.05 1.2276
2015-11-10 2015-09-30 13F West Pharmaceutical Services COM 955306105 120,209 2,804 2.39 6,506 -4.59 1.0597
2015-08-12 2015-06-30 13F West Pharmaceutical Services COM 955306105 117,405 -5,235 -4.27 6,819 -7.65 0.9825
2015-05-14 2015-03-31 13F West Pharmaceutical Services COM 955306105 122,640 122,640 7,384 1.1122
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.