WEST PHARMACEUTICAL SERVICES (WST) Institutional Shareholders
WEST PHARMACEUTICAL SERVICES (WST) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $16.84B in WST holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of WST tracked by InsiderSet, reporting ownership valued at approximately $1.71B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.33B, representing an estimated gain of +36.04% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed WST value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in WEST PHARMACEUTICAL SERVICES (WST).
This page ranks the largest institutional WST shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
776
Total Reported Value
$16.84B
Largest Holder
Blackrock, Inc.
Largest Position
$1.71B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
56
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.03% | 6,836,714 | $1,713,554,040 | $2,331,046,005 | +$617,491,965 | +36.04% | |
| Vanguard Capital Management Llc | 0.03% | 4,683,286 | $1,173,818,803 | $1,596,813,195 | +$422,994,392 | +36.04% | |
| Vanguard Portfolio Management Llc | 0.05% | 4,094,009 | $1,026,122,416 | $1,395,893,309 | +$369,770,893 | +36.04% | |
| State Street Corp | 0.03% | 3,293,778 | $825,552,518 | $1,123,046,547 | +$297,494,029 | +36.04% | |
| Artisan Partners Limited Partnership | 1.09% | 2,657,893 | $666,174,221 | $906,235,197 | +$240,060,976 | +36.04% | |
| Bank Of New York Mellon Corp | 0.11% | 2,465,858 | $618,042,720 | $840,758,944 | +$222,716,224 | +36.04% | |
| Generation Investment Management Llp | 5.04% | 2,243,976 | $562,430,145 | $765,106,057 | +$202,675,912 | +36.04% | |
| Geode Capital Management, Llc | 0.03% | 1,912,455 | $477,525,250 | $652,070,657 | +$174,545,407 | +36.55% | |
| Morgan Stanley | 0.02% | 1,458,282 | $365,504,513 | $497,215,831 | +$131,711,318 | +36.04% | |
| Brown Advisory Inc | 0.55% | 1,340,877 | $336,082,408 | $457,185,422 | +$121,103,014 | +36.03% | |
| Longview Partners (Guernsey) Ltd | 4.67% | 1,315,403 | $329,692,608 | $448,499,807 | +$118,807,199 | +36.04% | |
| Fmr Llc | 0.02% | 1,249,748 | $313,236,961 | $426,114,078 | +$112,877,117 | +36.04% | |
| Apg Asset Management N.V. | 0.87% | 1,267,282 | $275,673,981 | $432,092,471 | +$156,418,490 | +56.74% | |
| Invesco Ltd. | 0.04% | 1,056,007 | $264,677,597 | $360,056,147 | +$95,378,550 | +36.04% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.05% | 902,764 | $226,268,769 | $307,806,413 | +$81,537,644 | +36.04% | |
| Kayne Anderson Rudnick Investment Management Llc | 0.63% | 858,298 | $215,123,978 | $292,645,286 | +$77,521,308 | +36.04% | |
| Td Asset Management Inc | 0.16% | 768,953 | $192,730,380 | $262,182,215 | +$69,451,835 | +36.04% | |
| Northern Trust Corp | 0.02% | 731,283 | $183,288,772 | $249,338,252 | +$66,049,480 | +36.04% | |
| Goldman Sachs Group Inc | 0.02% | 727,617 | $182,369,877 | $248,088,292 | +$65,718,415 | +36.04% | |
| Jacobs Levy Equity Management, Inc | 0.74% | 705,336 | $176,785,415 | $240,491,363 | +$63,705,948 | +36.04% | |
| Proshare Advisors Llc | 0.24% | 660,084 | $165,443,452 | $225,062,241 | +$59,618,789 | +36.04% | |
| Amundi | 0.04% | 644,065 | $161,428,451 | $219,600,402 | +$58,171,951 | +36.04% | |
| Findlay Park Partners Llp | 2.15% | 616,766 | $154,586,230 | $210,292,535 | +$55,706,305 | +36.04% | |
| Capital Research Global Investors | 0.02% | 604,011 | $151,389,317 | $205,943,591 | +$54,554,274 | +36.04% | |
| Charles Schwab Investment Management Inc | 0.02% | 554,332 | $138,937,772 | $189,005,039 | +$50,067,267 | +36.04% | |
| Epoch Investment Partners, Inc. | 0.83% | 545,050 | $136,611,332 | $185,840,248 | +$49,228,916 | +36.04% | |
| Sei Investments Co | 0.12% | 529,261 | $132,653,661 | $180,456,831 | +$47,803,170 | +36.04% | |
| Arrowstreet Capital, Limited Partnership | 0.07% | 510,516 | $127,955,730 | $174,065,535 | +$46,109,805 | +36.04% | |
| Legal & General Group Plc | 0.03% | 506,458 | $126,938,641 | $172,681,920 | +$45,743,279 | +36.04% | |
| Dimensional Fund Advisors Lp | 0.02% | 461,462 | $115,639,545 | $157,340,084 | +$41,700,539 | +36.06% | |
| Bill & Melinda Gates Foundation Trust | Bill Gates | 0.35% | 444,500 | $111,409,480 | $151,556,720 | +$40,147,240 | +36.04% |
| Deutsche Bank Ag\ | 0.03% | 418,854 | $104,981,567 | $142,812,460 | +$37,830,893 | +36.04% | |
| Viking Global Investors | Ole Andreas Halvorsen | 0.29% | 416,948 | $104,503,847 | $142,162,590 | +$37,658,743 | +36.04% |
| Storebrand Asset Management As | 0.03% | 309,999 | $102,631,820 | $105,697,259 | +$3,065,439 | +2.99% | |
| Nuveen, Llc | 0.03% | 408,990 | $102,509,253 | $139,449,230 | +$36,939,977 | +36.04% | |
| Vanguard Fiduciary Trust Co | 0.03% | 405,104 | $101,535,267 | $138,124,260 | +$36,588,993 | +36.04% | |
| Liontrust Investment Partners Llp | 1.50% | 366,188 | $100,752,966 | $124,855,460 | +$24,102,494 | +23.92% | |
| American Century Companies Inc | 0.05% | 399,700 | $100,180,808 | $136,281,712 | +$36,100,904 | +36.04% | |
| State Farm Mutual Automobile Insurance Co | 0.08% | 388,239 | $97,308,223 | $132,373,969 | +$35,065,746 | +36.04% | |
| Bank Of America Corp | 0.01% | 381,813 | $95,697,698 | $130,182,960 | +$34,485,262 | +36.04% | |
| Royal Bank Of Canada | 0.02% | 377,552 | $94,628,000 | $128,730,130 | +$34,102,130 | +36.04% | |
| Envestnet Asset Management Inc | 0.02% | 259,536 | $93,173,462 | $88,491,395 | -$4,682,067 | -5.03% | |
| Barclays Plc | 0.03% | 349,104 | $87,499,425 | $119,030,500 | +$31,531,075 | +36.04% | |
| Riverbridge Partners Llc | 2.33% | 232,514 | $83,472,421 | $79,277,973 | -$4,194,448 | -5.02% | |
| Citadel Advisors Llc | 0.06% | 323,587 | $81,103,846 | $110,330,224 | +$29,226,378 | +36.04% | |
| Bnp Paribas Financial Markets | 0.05% | 313,594 | $78,599,200 | $106,923,010 | +$28,323,810 | +36.04% | |
| Jane Street Group, Llc | 0.08% | 305,132 | $76,478,284 | $104,037,807 | +$27,559,523 | +36.04% | |
| Ubs Group Ag | 0.01% | 275,508 | $69,053,325 | $93,937,208 | +$24,883,883 | +36.04% | |
| Citigroup Inc | 0.03% | 190,778 | $68,489,363 | $65,047,667 | -$3,441,696 | -5.03% | |
| Worldquant Millennium Advisors Llc | 0.26% | 268,107 | $67,198,338 | $91,413,763 | +$24,215,425 | +36.04% |
Frequently asked questions about WST
Who owns the most WST stock?
The largest holders of WST are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for WEST PHARMACEUTICAL SERVICES (WST).
Is WST widely held by superinvestors?
Many widely followed stocks like WST appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly WST is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.