Citadel Advisors
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Citadel Advisors’s West Pharmaceutical WST Stock Holding History

Citadel Advisors’s Portfolio WST Stock Details WST Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$7.69M Buy
30,700
+19,300
+169% +$4.8M ﹤0.01% 3641
2025
Q4 		$3.14M Sell
11,400
-36,100
-76% -$9.87M ﹤0.01% 5078
2025
Q3 		$12.5M Sell
47,500
-5,300
-10% -$1.29M ﹤0.01% 2936
2025
Q2 		$11.6M Sell
52,800
-35,600
-40% -$7.61M ﹤0.01% 2824
2025
Q1 		$19.8M Buy
88,400
+46,200
+109% +$12.7M ﹤0.01% 2049
2024
Q4 		$13.8M Sell
42,200
-6,000
-12% -$1.89M ﹤0.01% 2575
2024
Q3 		$14.5M Buy
48,200
+1,200
+3% +$367K ﹤0.01% 2424
2024
Q2 		$15.5M Buy
47,000
+14,300
+44% +$5.05M ﹤0.01% 2275
2024
Q1 		$12.9M Buy
32,700
+11,900
+57% +$4.4M ﹤0.01% 2590
2023
Q4 		$7.32M Sell
20,800
-2,300
-10% -$814K ﹤0.01% 3253
2023
Q3 		$8.67M Buy
23,100
+11,300
+96% +$4.37M ﹤0.01% 2868
2023
Q2 		$4.51M Buy
11,800
+2,500
+27% +$893K ﹤0.01% 3805
2023
Q1 		$3.22M Sell
9,300
-9,100
-49% -$2.66M ﹤0.01% 4525
2022
Q4 		$4.33M Buy
18,400
+3,800
+26% +$900K ﹤0.01% 4098
2022
Q3 		$3.59M Buy
14,600
+2,200
+18% +$670K ﹤0.01% 4455
2022
Q2 		$3.75M Sell
12,400
-11,200
-47% -$3.64M ﹤0.01% 4342
2022
Q1 		$9.69M Buy
23,600
+4,000
+20% +$1.57M ﹤0.01% 3007
2021
Q4 		$9.19M Buy
19,600
+2,800
+17% +$1.21M ﹤0.01% 3216
2021
Q3 		$7.13M Buy
16,800
+10,700
+175% +$4.51M ﹤0.01% 3657
2021
Q2 		$2.19M Sell
6,100
-1,000
-14% -$330K ﹤0.01% 6368
2021
Q1 		$2M Sell
7,100
-2,800
-28% -$801K ﹤0.01% 6384
2020
Q4 		$2.81M Buy
9,900
+300
+3% +$84.2K ﹤0.01% 4697
2020
Q3 		$2.64M Sell
9,600
-800
-8% -$212K ﹤0.01% 4209
2020
Q2 		$2.36M Sell
10,400
-4,200
-29% -$825K ﹤0.01% 4285
2020
Q1 		$2.22M Buy
14,600
+10,100
+224% +$1.55M ﹤0.01% 3968
2019
Q4 		$676K Sell
4,500
-600
-12% -$87.4K ﹤0.01% 6307
2019
Q3 		$723K Buy
+5,100
New +$702K ﹤0.01% 6148
2019
Q2 		– Sell
-5,200
Closed -$573K – 9946
2019
Q1 		$573K Buy
+5,200
New +$541K ﹤0.01% 6570
2017
Q4 		– Sell
-2,100
Closed -$202K – 8504
2017
Q3 		$202K Sell
2,100
-2,200
-51% -$199K ﹤0.01% 6684
2017
Q2 		$406K Hold
4,300
– – ﹤0.01% 5428
2017
Q1 		$351K Buy
+4,300
New +$360K ﹤0.01% 5636
2016
Q1 		– Sell
-200
Closed -$12K – 8097
2015
Q4 		$12K Sell
200
-5,000
-96% -$301K ﹤0.01% 8215
2015
Q3 		$281K Buy
5,200
+1,600
+44% +$93.2K ﹤0.01% 5668
2015
Q2 		$209K Buy
3,600
+500
+16% +$27.9K ﹤0.01% 6261
2015
Q1 		$187K Buy
+3,100
New +$165K ﹤0.01% 6253
2014
Q4 		– Sell
-2,000
Closed -$90K – 8761
2014
Q3 		$90K Buy
2,000
+200
+11% +$8.5K ﹤0.01% 6506
2014
Q2 		$76K Sell
1,800
-3,900
-68% -$167K ﹤0.01% 6444
2014
Q1 		$251K Buy
5,700
+3,100
+119% +$146K ﹤0.01% 5248
2013
Q4 		$128K Buy
+2,600
New +$122K ﹤0.01% 5413

Other funds holding WST

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
GIM
Generation Investment Management London, United Kingdom $11.2B AUM 0.58% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Citadel Advisors's WST Position: Q1 2026 in Review

Citadel Advisors increased its West Pharmaceutical (WST) stake by 32% in Q1 2026, buying an estimated $19.4M and bringing the position to 323,587 shares worth $81.1M. The position accounts for 0.01% of the portfolio, ranked #959.

Citadel Advisors first reported a position in WST in Q2 2013 and has held it in 48 quarters since. The position peaked at $582M in Q3 2023. 753 funds tracked by Wall St. Rank hold WST as of Q1 2026.

  • Citadel Advisors held 323,587 shares of West Pharmaceutical worth $81.1M as of Q1 2026.
  • Citadel Advisors bought 77,947 West Pharmaceutical shares in Q1 2026, an estimated $19.4M.
  • West Pharmaceutical made up 0.01% of Citadel Advisors's portfolio in Q1 2026, its #959 holding.
  • Citadel Advisors first reported a position in West Pharmaceutical in Q2 2013 and has held it in 48 quarters since.
  • Citadel Advisors's West Pharmaceutical position peaked at $582M in Q3 2023.
  • 753 funds tracked by Wall St. Rank held West Pharmaceutical as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.