Renaissance Technologies (RenTech)'s IRWD Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 7.99 M shares of Ironwood Pharmaceuticals, Inc. (IRWD) worth $33.65 M, representing 0.05% of the portfolio. First purchased in 2015-Q2, this long-term strategic position has been held for 37 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in IRWD, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2022, adding 2.29 M shares. Largest reduction occurred in Q2 2025, reducing 1.53 M shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Ironwood Pharmaceuticals (IRWD) Holding Value Over Time
Track share changes against reported price movement
Quarterly Ironwood Pharmaceuticals (IRWD) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | -67,847 | Reduce 0.84% | 7.99 M | $4.21 |
| Q1 2026 | -143,900 | Reduce 1.75% | 8.06 M | $3.51 |
| Q4 2025 | -147,200 | Reduce 1.76% | 8.2 M | $3.37 |
| Q3 2025 | -53,996 | Reduce 0.64% | 8.35 M | $1.31 |
| Q2 2025 | -1.53 M | Reduce 15.44% | 8.41 M | $0.72 |
| Q1 2025 | +874,251 | Add 9.64% | 9.94 M | $1.47 |
| Q4 2024 | +469,043 | Add 5.46% | 9.07 M | $4.43 |
| Q3 2024 | +25,300 | Add 0.30% | 8.6 M | $4.12 |
| Q2 2024 | +1.47 M | Add 20.73% | 8.57 M | $6.52 |
| Q1 2024 | +503,903 | Add 7.64% | 7.1 M | $8.71 |
| Q4 2023 | +796,000 | Add 13.72% | 6.6 M | $11.44 |
| Q3 2023 | +480,445 | Add 9.03% | 5.8 M | $9.63 |
| Q2 2023 | +681,700 | Add 14.70% | 5.32 M | $0.01 |
| Q1 2023 | +263,600 | Add 6.03% | 4.64 M | $0.01 |
| Q4 2022 | -999,000 | Reduce 18.59% | 4.37 M | $0.01 |
| Q3 2022 | -42,200 | Reduce 0.78% | 5.37 M | $10.36 |
| Q2 2022 | +2.29 M | Add 73.40% | 5.42 M | $11.53 |
| Q1 2022 | +443,800 | Add 16.56% | 3.12 M | $12.58 |
| Q4 2021 | +469,700 | Add 21.26% | 2.68 M | $11.66 |
| Q3 2021 | -1.23 M | Reduce 35.73% | 2.21 M | $13.06 |
| Q2 2021 | +297,300 | Add 9.47% | 3.44 M | $12.87 |
| Q1 2021 | +1.14 M | Add 56.59% | 3.14 M | $11.18 |
| Q4 2020 | +1.09 M | Add 118.55% | 2.01 M | $11.39 |
| Q3 2020 | -396,100 | Reduce 30.15% | 917,753 | $8.99 |
| Q2 2020 | -184,600 | Reduce 12.32% | 1.31 M | $10.32 |
| Q1 2020 | +744,763 | Add 98.82% | 1.5 M | $10.09 |
| Q4 2019 | +667,637 | Add 775.84% | 753,690 | $13.31 |
| Q3 2019 | +86,053 | New Buy | 86,053 | $8.59 |
| Q2 2019 | -357,453 | Sold Out | 0 | $0.00 |
| Q1 2019 | +357,453 | New Buy | 357,453 | $13.53 |
| Q3 2017 | -630,253 | Sold Out | 0 | $0.00 |
| Q2 2017 | +443,800 | Add 238.02% | 630,253 | $18.88 |
| Q1 2017 | +186,453 | New Buy | 186,453 | $17.06 |
| Q1 2016 | -242,553 | Sold Out | 0 | $0.00 |
| Q4 2015 | +211,300 | Add 676.10% | 242,553 | $11.59 |
| Q3 2015 | -38,050 | Reduce 54.90% | 31,253 | $10.43 |
| Q2 2015 | +69,303 | New Buy | 69,303 | $12.06 |
Renaissance Technologies (RenTech)'s Ironwood Pharmaceuticals Investment FAQs
Renaissance Technologies (RenTech) first purchased Ironwood Pharmaceuticals, Inc. (IRWD) in Q2 2015, acquiring 69,303 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 Ironwood Pharmaceuticals, Inc. (IRWD) for 37 quarters since Q2 2015.
Renaissance Technologies (RenTech)'s largest addition to Ironwood Pharmaceuticals, Inc. (IRWD) was in Q2 2022, adding 5,415,353 shares worth $62.44 M.
According to the latest 13F filing for Q2 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 7,993,226 shares of Ironwood Pharmaceuticals, Inc. (IRWD), valued at approximately $33.65 M.
As of the Q2 2026 filing, Ironwood Pharmaceuticals, Inc. (IRWD) represents approximately 0.05% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Ironwood Pharmaceuticals, Inc. (IRWD) was 9,940,492 shares, as reported at the end of Q1 2025.