Renaissance Technologies (RenTech)'s ALKS Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 6.67 M shares of Alkermes plc (ALKS) worth $186.57 M, representing 0.29% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 45 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in ALKS, representing a significant commitment to this investment thesis. Largest addition occurred in Q2 2019, adding 2.3 M shares. Largest reduction occurred in Q1 2021, reducing 889,900 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Alkermes plc (ALKS) Holding Value Over Time
Track share changes against reported price movement
Quarterly Alkermes plc (ALKS) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +375,500 | Add 5.97% | 6.67 M | $27.98 |
| Q3 2025 | +482,368 | Add 8.30% | 6.29 M | $30.00 |
| Q2 2025 | +71,332 | Add 1.24% | 5.81 M | $28.61 |
| Q1 2025 | +260,100 | Add 4.75% | 5.74 M | $33.02 |
| Q4 2024 | +57,697 | Add 1.06% | 5.48 M | $28.76 |
| Q3 2024 | -62,800 | Reduce 1.15% | 5.42 M | $27.99 |
| Q2 2024 | -403,320 | Reduce 6.85% | 5.48 M | $24.10 |
| Q1 2024 | -162,166 | Reduce 2.68% | 5.89 M | $27.07 |
| Q4 2023 | -66,696 | Reduce 1.09% | 6.05 M | $27.74 |
| Q3 2023 | +949,600 | Add 18.38% | 6.12 M | $28.01 |
| Q2 2023 | +227,500 | Add 4.61% | 5.17 M | $0.03 |
| Q1 2023 | -705,600 | Reduce 12.50% | 4.94 M | $0.03 |
| Q4 2022 | +88,400 | Add 1.59% | 5.64 M | $0.03 |
| Q3 2022 | +233,500 | Add 4.39% | 5.56 M | $22.33 |
| Q2 2022 | +454,600 | Add 9.34% | 5.32 M | $29.79 |
| Q1 2022 | +57,068 | Add 1.19% | 4.87 M | $26.31 |
| Q4 2021 | +66,463 | Add 1.40% | 4.81 M | $23.26 |
| Q3 2021 | -534,131 | Reduce 10.12% | 4.74 M | $30.84 |
| Q2 2021 | -786,900 | Reduce 12.97% | 5.28 M | $24.52 |
| Q1 2021 | -889,900 | Reduce 12.79% | 6.07 M | $18.68 |
| Q4 2020 | +171,200 | Add 2.52% | 6.96 M | $19.95 |
| Q3 2020 | -350,800 | Reduce 4.92% | 6.78 M | $16.57 |
| Q2 2020 | -46,100 | Reduce 0.64% | 7.14 M | $19.41 |
| Q1 2020 | +544,360 | Add 8.20% | 7.18 M | $14.42 |
| Q4 2019 | +1.74 M | Add 35.41% | 6.64 M | $20.40 |
| Q3 2019 | +950,622 | Add 24.06% | 4.9 M | $19.51 |
| Q2 2019 | +2.3 M | Add 139.72% | 3.95 M | $22.54 |
| Q1 2019 | +853,585 | Add 107.45% | 1.65 M | $36.49 |
| Q4 2018 | +794,401 | New Buy | 794,401 | $29.51 |
| Q2 2018 | -114,786 | Sold Out | 0 | $0.00 |
| Q1 2018 | +114,786 | New Buy | 114,786 | $57.96 |
| Q2 2017 | -124,886 | Sold Out | 0 | $0.00 |
| Q1 2017 | +124,886 | New Buy | 124,886 | $58.50 |
| Q1 2016 | -26,286 | Sold Out | 0 | $0.00 |
| Q4 2015 | +26,286 | New Buy | 26,286 | $79.40 |
| Q3 2015 | -229,286 | Sold Out | 0 | $0.00 |
| Q2 2015 | +30,600 | Add 15.40% | 229,286 | $64.34 |
| Q1 2015 | +134,700 | Add 210.51% | 198,686 | $60.97 |
| Q4 2014 | -91,800 | Reduce 58.93% | 63,986 | $58.56 |
| Q3 2014 | -58,900 | Reduce 27.44% | 155,786 | $42.87 |
| Q2 2014 | +161,376 | Add 302.71% | 214,686 | $50.33 |
| Q1 2014 | -452,276 | Reduce 89.46% | 53,310 | $44.08 |
| Q4 2013 | -156,100 | Reduce 23.59% | 505,586 | $40.66 |
| Q3 2013 | -133,000 | Reduce 16.74% | 661,686 | $33.62 |
| Q2 2013 | +794,686 | Add 0.00% | 794,686 | $28.68 |
Renaissance Technologies (RenTech)'s Alkermes plc Investment FAQs
Renaissance Technologies (RenTech) first purchased Alkermes plc (ALKS) in Q2 2013, acquiring 794,686 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 Alkermes plc (ALKS) for 45 quarters since Q2 2013.
Renaissance Technologies (RenTech)'s largest addition to Alkermes plc (ALKS) was in Q2 2019, adding 3,950,586 shares worth $89.05 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 6,668,028 shares of Alkermes plc (ALKS), valued at approximately $186.57 M.
As of the Q4 2025 filing, Alkermes plc (ALKS) represents approximately 0.29% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Alkermes plc (ALKS) was 7,181,113 shares, as reported at the end of Q1 2020.