Renaissance Technologies (RenTech)'s RLYB Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 104,462 shares of Rallybio Corporation (RLYB) worth $573,368, representing 0.00% of the portfolio. First purchased in 2022-Q1, this medium-term investment has been held for 12 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in RLYB, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2024, adding 61,012 shares. Largest reduction occurred in Q2 2024, reducing 18,424 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Rallybio Corporation (RLYB) Holding Value Over Time
Track share changes against reported price movement
Quarterly Rallybio Corporation (RLYB) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +15,112 | Add 16.91% | 104,462 | $5.49 |
| Q3 2025 | +28,721 | Add 47.37% | 89,350 | $3.99 |
| Q2 2025 | +11,067 | Add 22.33% | 60,629 | $2.70 |
| Q1 2025 | -5,603 | Reduce 10.16% | 49,562 | $5.24 |
| Q4 2024 | +4,703 | Add 9.32% | 55,165 | $7.68 |
| Q3 2024 | +7,874 | Add 18.49% | 50,462 | $9.36 |
| Q2 2024 | -18,424 | Reduce 30.20% | 42,588 | $10.72 |
| Q1 2024 | +61,012 | New Buy | 61,012 | $14.80 |
| Q1 2023 | -1,725 | Sold Out | 0 | $0.00 |
| Q4 2022 | +1,725 | New Buy | 1,725 | $0.05 |
| Q2 2022 | -6,589 | Sold Out | 0 | $0.00 |
| Q1 2022 | +6,589 | New Buy | 6,589 | $55.85 |
Renaissance Technologies (RenTech)'s Rallybio Corporation Investment FAQs
Renaissance Technologies (RenTech) first purchased Rallybio Corporation (RLYB) in Q1 2022, acquiring 6,589 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 Rallybio Corporation (RLYB) for 12 quarters since Q1 2022.
Renaissance Technologies (RenTech)'s largest addition to Rallybio Corporation (RLYB) was in Q1 2024, adding 61,012 shares worth $903,000.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 104,462 shares of Rallybio Corporation (RLYB), valued at approximately $573,368.
As of the Q4 2025 filing, Rallybio Corporation (RLYB) represents approximately 0.00% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Rallybio Corporation (RLYB) was 104,462 shares, as reported at the end of Q4 2025.