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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 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
38
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 12 listed it in both
Shares listed
8,016,852
combined, among listed positions
Reported value
$2.2bn
combined, at the quarter end

Among the 92 comparable managers: 25 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,645,586.

Managers listing WST in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

38 of 38 holders

ActionFiling
Artisan Partners LP2,850,401$784m1.17%Added+79,48117 Feb 2026 (the filing on sec.gov)
Invesco Ltd908,625$250munder 0.1%Added+27,34019 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC517,631$142m0.07%Trimmed-28,24817 Feb 2026 (the filing on sec.gov)
Steadfast Capital Management LP429,907$118m2.03%Trimmed-41,51117 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC427,512$118m0.09%Trimmed-17,88327 Oct 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc339,267$93munder 0.1%Added+224,72217 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP300,404$83munder 0.1%Added+79,44013 Feb 2026 (the filing on sec.gov)
Viking Global Investors LP295,028$81m0.22%Newnew17 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC245,640$68munder 0.1%Trimmed-481,89717 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP235,037$65m0.07%Trimmed-424,21617 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC219,746$60munder 0.1%Added+183,50112 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP139,939$39m0.05%Added+38,73817 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC134,453$37m0.11%Added+109,72213 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP127,717$35m0.07%Trimmed-59,39417 Feb 2026 (the filing on sec.gov)
Millennium Management LLC110,393$30munder 0.1%Trimmed-202,59317 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)109,654$30munder 0.1%Added+65,29017 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC104,736$29munder 0.1%Newnew12 Feb 2026 (the filing on sec.gov)
Moore Capital Management LP95,000$26m0.38%Held017 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP80,043$22munder 0.1%Trimmed-2,98517 Feb 2026 (the filing on sec.gov)
Man Group PLC67,328$19munder 0.1%Trimmed-35,15717 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp40,670$11munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP35,625$9.8munder 0.1%Added+34,82513 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP35,448$9.8munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC26,928$7.4munder 0.1%Added+13813 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC22,019$6.1munder 0.1%Added+20,10113 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (8)

Exited (2)

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 →