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WST in the 13F filings

West Pharmaceutical SVSC Inc · CUSIP 955306105

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Surgical, medical and electromedical devices
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
33
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 10 listed it in both
Shares listed
9,543,588
combined, among listed positions
Reported value
$2.4bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 21 buyers (opened or added shares) and 20 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,531,376.

Managers listing WST in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

33 of 33 holders

ActionFiling
Artisan Partners LP2,657,893$666m1.07%Trimmed-192,50813 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,249,748$313munder 0.1%Added+1,140,09415 May 2026 (the filing on sec.gov)
Invesco Ltd1,056,007$265munder 0.1%Added+147,38212 May 2026 (the filing on sec.gov)
Capital Research Global Investors604,011$151munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc526,383$132munder 0.1%Added+187,11615 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP510,516$128m0.07%Added+210,11214 May 2026 (the filing on sec.gov)
Viking Global Investors LP416,948$105m0.29%Added+121,92015 May 2026 (the filing on sec.gov)
Citadel Advisors LLC323,587$81munder 0.1%Added+77,94715 May 2026 (the filing on sec.gov)
Jane Street Group LLC305,132$76munder 0.1%Added+85,38612 May 2026 (the filing on sec.gov)
AQR Capital Management LLC266,944$67munder 0.1%Trimmed-250,68715 May 2026 (the filing on sec.gov)
Wellington Management Group LLP248,636$62munder 0.1%Added+232,77615 May 2026 (the filing on sec.gov)
Two Sigma Investments LP225,631$57munder 0.1%Added+85,69215 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC209,660$53m0.08%Added+104,92414 May 2026 (the filing on sec.gov)
Holocene Advisors LP203,621$51m0.12%Added+75,90415 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC181,853$46munder 0.1%Trimmed-245,65927 Oct 2026 (the filing on sec.gov)
Point72 Asset Management LP159,350$40m0.05%Trimmed-75,68715 May 2026 (the filing on sec.gov)
AllianceBernstein LP87,301$24munder 0.1%Added+7,25815 May 2026 (the filing on sec.gov)
Man Group PLC79,649$20munder 0.1%Added+12,32115 May 2026 (the filing on sec.gov)
Tudor Investment Corp65,415$16munder 0.1%Added+24,74515 May 2026 (the filing on sec.gov)
Winton Group Ltd33,422$8.4m0.29%Newnew12 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP26,814$6.7m0.05%Added+10,24614 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC23,661$5.9munder 0.1%Added+1,64215 May 2026 (the filing on sec.gov)
Bridgewater Associates LP23,161$5.8munder 0.1%Added+19,08815 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.14,001$3.5munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Millennium Management LLC13,775$3.5munder 0.1%Trimmed-96,61815 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (4)

Exited (8)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
14 in Q3 2024 to 12 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
WST by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20133$230mn.a.n.a.
Q3 20134$290mn.a.n.a.
Q4 20135$370mn.a.n.a.
Q1 20144$348mn.a.n.a.
Q2 20144$344mn.a.n.a.
Q3 20143$349mn.a.n.a.
Q4 20143$403mn.a.n.a.
Q1 20154$757mn.a.n.a.
Q2 20154$795mn.a.n.a.
Q3 20154$798mn.a.n.a.
Q4 20154$896mn.a.n.a.
Q1 20164$1.0bnn.a.n.a.
Q2 20166$1.0bnn.a.n.a.
Q3 20167$1.1bnn.a.n.a.
Q4 20167$1.4bnn.a.n.a.
Q1 20178$1.3bnn.a.n.a.
Q2 201712$1.4bnn.a.n.a.
Q3 20175$1.4bnn.a.n.a.
Q4 20178$1.6bnn.a.n.a.
Q1 20188$1.5bnn.a.n.a.
Q2 20188$1.7bnn.a.n.a.
Q3 201811$2.1bnn.a.n.a.
Q4 201810$1.7bnn.a.n.a.
Q1 201914$2.0bnn.a.n.a.
Q2 201912$2.2bnn.a.n.a.
Q3 201920$2.6bnn.a.n.a.
Q4 201912$2.4bnn.a.n.a.
Q1 202019$2.3bnn.a.n.a.
Q2 202016$3.2bnn.a.n.a.
Q3 202020$3.8bnn.a.n.a.
Q4 202018$3.9bnn.a.n.a.
Q1 202115$3.6bnn.a.n.a.
Q2 202116$4.9bnn.a.n.a.
Q3 202121$5.9bnn.a.n.a.
Q4 202118$6.8bnn.a.n.a.
Q1 202220$6.3bnn.a.n.a.
Q2 202219$4.4bnn.a.n.a.
Q3 202223$2.9bnn.a.n.a.
Q4 202220$2.2bnn.a.n.a.
Q1 202319$3.9bnn.a.n.a.
Q2 202319$4.1bnn.a.n.a.
Q3 202320$4.3bnn.a.n.a.
Q4 202316$3.5bn710
Q1 202417$4.1bn127
Q2 202414$3.2bn97
Q3 202414$2.9bn95
Q4 202417$3.0bn118
Q1 202512$1.4bn94
Q2 202513$1.3bn123
Q3 202513$2.1bn122
Q4 202516$1.6bn2514
Q1 202612$1.3bn2120
Q2 202612$3.1bn1520

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

WST and LLY →WST and JNJ →WST and VRTX →Choose a stock to compare with WST →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own WST, latest filings →Back to the 13F Explorer →