Renaissance Technologies (RenTech)'s CRBU Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 2.77 M shares of Caribou Biosciences, Inc. (CRBU) worth $4.88 M, representing 0.01% of the portfolio. First purchased in 2021-Q4, this medium-term investment has been held for 16 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in CRBU, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2024, adding 1.48 M shares. Largest reduction occurred in Q3 2024, reducing 888,700 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Caribou Biosciences (CRBU) Holding Value Over Time
Track share changes against reported price movement
Quarterly Caribou Biosciences (CRBU) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | +183,048 | Add 7.07% | 2.77 M | $1.76 |
| Q1 2026 | +950,640 | Add 57.97% | 2.59 M | $1.90 |
| Q4 2025 | +859,436 | Add 110.12% | 1.64 M | $1.59 |
| Q3 2025 | +248,300 | Add 46.66% | 780,421 | $2.33 |
| Q2 2025 | +532,121 | New Buy | 532,121 | $1.26 |
| Q4 2024 | -594,200 | Sold Out | 0 | $0.00 |
| Q3 2024 | -888,700 | Reduce 59.93% | 594,200 | $1.96 |
| Q2 2024 | +1.48 M | New Buy | 1.48 M | $1.64 |
| Q1 2024 | -32,400 | Sold Out | 0 | $0.00 |
| Q4 2023 | +32,400 | New Buy | 32,400 | $5.74 |
| Q2 2023 | -77,700 | Sold Out | 0 | $0.00 |
| Q1 2023 | +77,700 | New Buy | 77,700 | $0.01 |
| Q3 2022 | -239,000 | Sold Out | 0 | $0.00 |
| Q2 2022 | +93,900 | Add 64.71% | 239,000 | $5.43 |
| Q1 2022 | +49,151 | Add 51.23% | 145,100 | $9.18 |
| Q4 2021 | +95,949 | New Buy | 95,949 | $15.09 |
Renaissance Technologies (RenTech)'s Caribou Biosciences Investment FAQs
Renaissance Technologies (RenTech) first purchased Caribou Biosciences, Inc. (CRBU) in Q4 2021, acquiring 95,949 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 Caribou Biosciences, Inc. (CRBU) for 16 quarters since Q4 2021.
Renaissance Technologies (RenTech)'s largest addition to Caribou Biosciences, Inc. (CRBU) was in Q2 2024, adding 1,482,900 shares worth $2.43 M.
According to the latest 13F filing for Q2 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 2,773,545 shares of Caribou Biosciences, Inc. (CRBU), valued at approximately $4.88 M.
As of the Q2 2026 filing, Caribou Biosciences, Inc. (CRBU) represents approximately 0.01% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Caribou Biosciences, Inc. (CRBU) was 2,773,545 shares, as reported at the end of Q2 2026.