Renaissance Technologies (RenTech)'s NBBK Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 251,274 shares of NB Bancorp, Inc. (NBBK) worth $4.98 M, representing 0.01% of the portfolio. First purchased in 2024-Q1, this short-term holding has been held for 8 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained this position in NBBK for several quarters, showing initial confidence in the investment. Largest addition occurred in Q4 2025, adding 140,374 shares. Largest reduction occurred in Q2 2025, reducing 58,052 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s NB Bancorp (NBBK) Holding Value Over Time
Track share changes against reported price movement
Quarterly NB Bancorp (NBBK) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +140,374 | Add 126.58% | 251,274 | $19.82 |
| Q3 2025 | -33,248 | Reduce 23.07% | 110,900 | $17.65 |
| Q2 2025 | -58,052 | Reduce 28.71% | 144,148 | $17.86 |
| Q1 2025 | +36,700 | Add 22.18% | 202,200 | $18.07 |
| Q4 2024 | +89,300 | Add 117.19% | 165,500 | $18.06 |
| Q3 2024 | +5,500 | Add 7.78% | 76,200 | $18.56 |
| Q2 2024 | +55,200 | Add 356.13% | 70,700 | $15.08 |
| Q1 2024 | +15,500 | New Buy | 15,500 | $13.68 |
Renaissance Technologies (RenTech)'s NB Bancorp Investment FAQs
Renaissance Technologies (RenTech) first purchased NB Bancorp, Inc. (NBBK) in Q1 2024, acquiring 15,500 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 NB Bancorp, Inc. (NBBK) for 8 quarters since Q1 2024.
Renaissance Technologies (RenTech)'s largest addition to NB Bancorp, Inc. (NBBK) was in Q4 2025, adding 251,274 shares worth $4.98 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 251,274 shares of NB Bancorp, Inc. (NBBK), valued at approximately $4.98 M.
As of the Q4 2025 filing, NB Bancorp, Inc. (NBBK) 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 NB Bancorp, Inc. (NBBK) was 251,274 shares, as reported at the end of Q4 2025.