Free · no sign-up · Q2 2026

Which funds own WST

West Pharmaceutical SVSC Inc in the Q2 2026 filings. At least 4 of the 91 current managers on file reported a position, worth $1.1bn between them. It is among the largest positions of fewer than a fifth of the current managers on file. Buying and selling roughly cancelled this quarter, which is what a name looks like when the argument is still live.

Managers holding: 4; at least, of 91 current
Combined value: $1.1bn; as reported
Opened: 1; new this quarter
Added to: 2; already held
Trimmed or sold out: 2; 1 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Artisan Partners LP Long-only · $63.1bn book	$866m	1.4%	2,411,792	+$200m-246,101	Trimmed
Point72 Asset Management LP Multi-strategy · $90.7bn book	$102m	0.1%	283,396	+$62m+124,046	Added
Holocene Advisors LP Long/short equity · $44.4bn book	$99m	0.2%	275,421	+$48m+71,800	Added
PDT Partners LLC Quantitative · $1.9bn book	$3.4m	0.2%	9,332	opened9,332	New

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Viking Global Investors LP · Long/short equity$105m held before

Ownership through time

At least 12 of the 95 managers whose filings are on file listed WST in Q2 2026, against 3 in Q2 2013. The same number as in Q1 2026: 2 started positions; 4 listed it again; 1 sold out, by its own filing; 5 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

Verition Fund Management LLC$7.7m
PDT Partners LLC$3.4m

Largest increases, by shares

Point72 Asset Management LP159,350 to 283,396 shares+$45m
Holocene Advisors LP203,621 to 275,421 shares+$26m
Verition Fund Management LLCnew: 21,511 shares+$7.7m
PDT Partners LLCnew: 9,332 shares+$3.4m
Capital Research Global Investors604,011 to 609,221 shares+$1.9m

Largest decreases, by shares

Artisan Partners LP2,657,893 to 2,411,792 shares-$88m
Arrowstreet Capital LP510,516 to 438,718 shares-$26m

Left it

Viking Global Investors LPwas $105m

Manager	First listed	Largest	Q2 2026
Fidelity (FMR LLC)	Q2 2021	$1.3bn	$1.3bn
Artisan Partners LP	Q3 2017	$1.0bn	$866m
Invesco Ltd	Q1 2020	$535m	$363m
Capital Research Global Investors	Q4 2018	$284m	$219m
Arrowstreet Capital LP	Q2 2017	$238m	$158m
Point72 Asset Management LP	Q3 2019	$173m	$102m
Holocene Advisors LP	Q1 2018	$141m	$99m
ExodusPoint Capital Management LP	Q2 2019	$25m	$11m
Verition Fund Management LLC	Q2 2016	$7.7m	$7.7m
PDT Partners LLC	Q4 2013	$5.1m	$3.4m
Freestone Grove Partners LP	Q1 2025	$44m	$2.0m
Caxton Associates LLP	Q1 2017	$1.6m	$1.4m
T. Rowe Price Associates Inc	Q1 2015	$2.9bn	last listed Q4 2024
AllianceBernstein LP	Q3 2016	$849m	last listed Q4 2024
Citadel Advisors LLC	Q1 2022	$582m	last listed Q3 2025
Neuberger Berman Group LLC	Q2 2013	$527m	last listed Q1 2026
Durable Capital Partners LP	Q1 2020	$489m	last listed Q3 2025
Janus Henderson Group Ltd	Q4 2017	$412m	last listed Q1 2022
MFS Investment Management	Q3 2018	$343m	last listed Q3 2024
Millennium Management LLC	Q4 2016	$204m	last listed Q2 2025
Marshall Wace LLP	Q2 2018	$149m	last listed Q1 2025
AQR Capital Management LLC	Q3 2016	$143m	last listed Q4 2025

What WST is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around WST →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Comps ExplorerValue it against the peers it trades beside Every managerRead any of these books in full Deal tapeWhat buyers paid for whole companies, not slices Hedge fund interviewsHow the room runs, and the stock pitch it wants

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