Renaissance Technologies (RenTech)'s WST Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 104,736 shares of West Pharmaceutical Services, Inc. (WST) worth $28.82 M, representing 0.04% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 40 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in WST, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2014, adding 499,800 shares. Largest reduction occurred in Q2 2016, reducing 468,300 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s West Pharmaceutical Services (WST) Holding Value Over Time
Track share changes against reported price movement
Quarterly West Pharmaceutical Services (WST) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +104,736 | New Buy | 104,736 | $275.14 |
| Q3 2025 | -24,300 | Sold Out | 0 | $0.00 |
| Q2 2025 | +24,300 | New Buy | 24,300 | $218.80 |
| Q1 2023 | -294,700 | Sold Out | 0 | $0.00 |
| Q4 2022 | +95,011 | Add 47.58% | 294,700 | $0.24 |
| Q3 2022 | -2,311 | Reduce 1.14% | 199,689 | $246.08 |
| Q2 2022 | +197,100 | Add 4022.45% | 202,000 | $302.37 |
| Q1 2022 | +3,300 | Add 206.25% | 4,900 | $410.61 |
| Q4 2021 | +1,600 | New Buy | 1,600 | $468.75 |
| Q1 2021 | -44,200 | Sold Out | 0 | $0.00 |
| Q4 2020 | +44,200 | New Buy | 44,200 | $283.30 |
| Q3 2020 | -61,100 | Sold Out | 0 | $0.00 |
| Q2 2020 | -304,100 | Reduce 83.27% | 61,100 | $227.17 |
| Q1 2020 | -195,200 | Reduce 34.83% | 365,200 | $152.25 |
| Q4 2019 | +187,700 | Add 50.36% | 560,400 | $150.33 |
| Q3 2019 | +63,700 | Add 20.61% | 372,700 | $141.82 |
| Q2 2019 | -111,600 | Reduce 26.53% | 309,000 | $125.15 |
| Q1 2019 | +281,000 | Add 201.29% | 420,600 | $110.20 |
| Q4 2018 | -20,800 | Reduce 12.97% | 139,600 | $98.03 |
| Q3 2018 | -113,200 | Reduce 41.37% | 160,400 | $123.47 |
| Q2 2018 | -153,600 | Reduce 35.96% | 273,600 | $99.29 |
| Q1 2018 | +60,700 | Add 16.56% | 427,200 | $88.29 |
| Q4 2017 | -54,000 | Reduce 12.84% | 366,500 | $98.67 |
| Q3 2017 | +101,900 | Add 31.98% | 420,500 | $96.26 |
| Q2 2017 | +314,500 | Add 7670.73% | 318,600 | $94.52 |
| Q1 2017 | +4,100 | New Buy | 4,100 | $81.71 |
| Q3 2016 | -45,900 | Sold Out | 0 | $0.00 |
| Q2 2016 | -468,300 | Reduce 91.07% | 45,900 | $75.88 |
| Q1 2016 | -300 | Reduce 0.06% | 514,200 | $69.32 |
| Q4 2015 | -84,000 | Reduce 14.04% | 514,500 | $60.22 |
| Q3 2015 | -235,300 | Reduce 28.22% | 598,500 | $54.12 |
| Q2 2015 | -69,400 | Reduce 7.68% | 833,800 | $58.08 |
| Q1 2015 | -37,400 | Reduce 3.98% | 903,200 | $60.21 |
| Q4 2014 | -312,200 | Reduce 24.92% | 940,600 | $53.24 |
| Q3 2014 | -354,300 | Reduce 22.05% | 1.25 M | $44.76 |
| Q2 2014 | +187,300 | Add 13.19% | 1.61 M | $42.18 |
| Q1 2014 | +499,800 | Add 54.33% | 1.42 M | $44.05 |
| Q4 2013 | +244,100 | Add 36.11% | 920,000 | $49.06 |
| Q3 2013 | +211,100 | Add 45.42% | 675,900 | $41.15 |
| Q2 2013 | +464,800 | Add 0.00% | 464,800 | $35.13 |
Renaissance Technologies (RenTech)'s West Pharmaceutical Services Investment FAQs
Renaissance Technologies (RenTech) first purchased West Pharmaceutical Services, Inc. (WST) in Q2 2013, acquiring 464,800 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies (RenTech) has held West Pharmaceutical Services, Inc. (WST) for 40 quarters since Q2 2013.
Renaissance Technologies (RenTech)'s largest addition to West Pharmaceutical Services, Inc. (WST) was in Q1 2014, adding 1,419,800 shares worth $62.54 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 104,736 shares of West Pharmaceutical Services, Inc. (WST), valued at approximately $28.82 M.
As of the Q4 2025 filing, West Pharmaceutical Services, Inc. (WST) represents approximately 0.04% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in West Pharmaceutical Services, Inc. (WST) was 1,607,100 shares, as reported at the end of Q2 2014.