Renaissance Technologies (RenTech)'s BELFB Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 231,351 shares of Bel Fuse Inc. (BELFB) worth $39.24 M, representing 0.06% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 51 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in BELFB, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2016, adding 82,317 shares. Largest reduction occurred in Q1 2022, reducing 65,606 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Bel Fuse (BELFB) Holding Value Over Time
Track share changes against reported price movement
Quarterly Bel Fuse (BELFB) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -21,500 | Reduce 8.50% | 231,351 | $169.63 |
| Q3 2025 | -30,600 | Reduce 10.80% | 252,851 | $141.02 |
| Q2 2025 | -40,300 | Reduce 12.45% | 283,451 | $97.69 |
| Q1 2025 | +20,219 | Add 6.66% | 323,751 | $74.86 |
| Q4 2024 | -1,919 | Reduce 0.63% | 303,532 | $82.47 |
| Q3 2024 | -4,400 | Reduce 1.42% | 305,451 | $78.51 |
| Q2 2024 | +4,027 | Add 1.32% | 309,851 | $65.24 |
| Q1 2024 | -19,013 | Reduce 5.85% | 305,824 | $60.31 |
| Q4 2023 | -34,214 | Reduce 9.53% | 324,837 | $66.77 |
| Q3 2023 | +26,000 | Add 7.81% | 359,051 | $47.72 |
| Q2 2023 | -19,900 | Reduce 5.64% | 333,051 | $0.06 |
| Q1 2023 | -51,700 | Reduce 12.78% | 352,951 | $0.04 |
| Q4 2022 | -47,900 | Reduce 10.58% | 404,651 | $0.03 |
| Q3 2022 | +13,700 | Add 3.12% | 452,551 | $25.25 |
| Q2 2022 | -40,394 | Reduce 8.43% | 438,851 | $15.56 |
| Q1 2022 | -65,606 | Reduce 12.04% | 479,245 | $17.84 |
| Q4 2021 | +34,200 | Add 6.70% | 544,851 | $12.93 |
| Q3 2021 | -900 | Reduce 0.18% | 510,651 | $12.43 |
| Q2 2021 | +35,800 | Add 7.52% | 511,551 | $14.40 |
| Q1 2021 | -25,500 | Reduce 5.09% | 475,751 | $19.89 |
| Q4 2020 | +428 | Add 0.09% | 501,251 | $15.03 |
| Q3 2020 | -3,600 | Reduce 0.71% | 500,823 | $10.68 |
| Q2 2020 | -36,000 | Reduce 6.66% | 504,423 | $10.73 |
| Q1 2020 | -1,400 | Reduce 0.26% | 540,423 | $9.74 |
| Q4 2019 | +35,000 | Add 6.91% | 541,823 | $20.50 |
| Q3 2019 | -12,616 | Reduce 2.43% | 506,823 | $15.03 |
| Q2 2019 | -2,784 | Reduce 0.53% | 519,439 | $17.17 |
| Q1 2019 | +76 | Add 0.01% | 522,223 | $25.28 |
| Q4 2018 | +5,647 | Add 1.09% | 522,147 | $18.42 |
| Q3 2018 | +18,800 | Add 3.78% | 516,500 | $26.50 |
| Q2 2018 | -1,717 | Reduce 0.34% | 497,700 | $20.90 |
| Q1 2018 | +22,417 | Add 4.70% | 499,417 | $18.90 |
| Q4 2017 | -7,117 | Reduce 1.47% | 477,000 | $25.17 |
| Q3 2017 | +19,700 | Add 4.24% | 484,117 | $31.20 |
| Q2 2017 | -15,300 | Reduce 3.19% | 464,417 | $24.70 |
| Q1 2017 | +75,700 | Add 18.74% | 479,717 | $25.55 |
| Q4 2016 | +82,317 | Add 25.59% | 404,017 | $30.90 |
| Q3 2016 | +57,600 | Add 21.81% | 321,700 | $24.14 |
| Q2 2016 | +41,900 | Add 18.86% | 264,100 | $17.78 |
| Q1 2016 | +15,100 | Add 7.29% | 222,200 | $14.60 |
| Q4 2015 | +17,200 | Add 9.06% | 207,100 | $17.29 |
| Q3 2015 | +14,200 | Add 8.08% | 189,900 | $19.44 |
| Q2 2015 | -22,517 | Reduce 11.36% | 175,700 | $20.52 |
| Q1 2015 | -383 | Reduce 0.19% | 198,217 | $19.03 |
| Q4 2014 | -6,400 | Reduce 3.12% | 198,600 | $27.34 |
| Q3 2014 | -2,017 | Reduce 0.97% | 205,000 | $24.74 |
| Q2 2014 | -26,000 | Reduce 11.16% | 207,017 | $25.67 |
| Q1 2014 | +5,200 | Add 2.28% | 233,017 | $21.90 |
| Q4 2013 | +30,200 | Add 15.28% | 227,817 | $21.31 |
| Q3 2013 | -10,170 | Reduce 4.89% | 197,617 | $17.44 |
| Q2 2013 | +207,787 | Add 0.00% | 207,787 | $13.45 |
Renaissance Technologies (RenTech)'s Bel Fuse Investment FAQs
Renaissance Technologies (RenTech) first purchased Bel Fuse Inc. (BELFB) in Q2 2013, acquiring 207,787 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 Bel Fuse Inc. (BELFB) for 51 quarters since Q2 2013.
Renaissance Technologies (RenTech)'s largest addition to Bel Fuse Inc. (BELFB) was in Q2 2013, adding 207,787 shares worth $2.8 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 231,351 shares of Bel Fuse Inc. (BELFB), valued at approximately $39.24 M.
As of the Q4 2025 filing, Bel Fuse Inc. (BELFB) represents approximately 0.06% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Bel Fuse Inc. (BELFB) was 544,851 shares, as reported at the end of Q4 2021.