RENAISSANCE TECHNOLOGIES LLC

Position in WST — West Pharmaceutical Services Inc

CIK 1037389 NEW YORK, NY

Position in WST

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$52,549,182

+$23,732,119 QoQ

Shares Held

209,660

+100.2% QoQ

Ownership

0.297%

of shares outstanding

% of Portfolio

0.08%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

11 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

RENAISSANCE TECHNOLOGIES LLC holds $297,303,624 across 28 Medical Instruments & Supplies names. WST ranks #2 (17.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ISRG	Intuitive Surgical Inc	139,402	$64,262,927
2	WST	West Pharmaceutical Services Inc This page	209,660	$52,549,182
3	NVST	Envista Holdings Corp	1,208,165	$30,651,146
4	ATR	Aptargroup, Inc.	172,800	$21,776,256
5	MMSI	Merit Medical Systems Inc	314,212	$21,658,633
6	XRAY	DENTSPLY SIRONA Inc.	1,569,358	$18,204,552
7	LMAT	Lemaitre Vascular Inc	138,502	$15,120,263
8	WRBY	Warby Parker Inc.	552,836	$11,648,254

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$52,549,182	209,660	+100.2%	Shares	Sole	2026-05-14
2025-12-31	$28,817,063	104,736	+331.0%	Shares	Sole	2026-02-12
2025-06-30	$5,316,840	24,300	-91.8%	Shares	Sole	2025-08-13
2022-12-31	$69,357,645	294,700	+47.6%	Shares	Sole	2023-02-13
2022-09-30	$49,139,469	199,689	-1.1%	Shares	Sole	2022-11-14
2022-06-30	$61,078,740	202,000	+4022.4%	Shares	Sole	2022-08-12
2022-03-31	$2,012,479	4,900	+206.2%	Shares	Sole	2022-05-13
2021-12-31	$750,416	1,600	-96.4%	Shares	Sole	2022-02-11
2020-12-31	$12,522,302	44,200	-27.7%	Shares	Sole	2021-02-10
2020-06-30	$13,880,087	61,100	-83.3%	Shares	Sole	2020-08-13
2020-03-31	$55,601,700	365,200	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.