Renaissance Technologies (RenTech)'s CALX Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 548,118 shares of Calix, Inc. (CALX) worth $20.46 M, representing 0.03% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 53 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in CALX, representing a significant commitment to this investment thesis. Largest addition occurred in Q1 2014, adding 722,900 shares. Largest reduction occurred in Q1 2021, reducing 568,300 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Calix (CALX) Holding Value Over Time
Track share changes against reported price movement
Quarterly Calix (CALX) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | +4,700 | Add 0.86% | 548,118 | $37.32 |
| Q1 2026 | +79,800 | Add 17.21% | 543,418 | $48.99 |
| Q4 2025 | +202,800 | Add 77.76% | 463,618 | $52.93 |
| Q3 2025 | +23,200 | Add 9.76% | 260,818 | $61.37 |
| Q2 2025 | +132,300 | Add 125.62% | 237,618 | $53.19 |
| Q1 2025 | -55,101 | Reduce 34.35% | 105,318 | $35.44 |
| Q4 2024 | -43,499 | Reduce 21.33% | 160,419 | $34.87 |
| Q3 2024 | +125,400 | Add 159.71% | 203,918 | $38.79 |
| Q2 2024 | +46,300 | Add 143.71% | 78,518 | $35.43 |
| Q1 2024 | +7,518 | Add 30.44% | 32,218 | $33.15 |
| Q4 2023 | -127,053 | Reduce 83.72% | 24,700 | $43.68 |
| Q3 2023 | -473,000 | Reduce 75.71% | 151,753 | $45.84 |
| Q2 2023 | -225,900 | Reduce 26.56% | 624,753 | $0.05 |
| Q1 2023 | +175,218 | Add 25.94% | 850,653 | $0.05 |
| Q4 2022 | -122,265 | Reduce 15.33% | 675,435 | $0.07 |
| Q3 2022 | -346,123 | Reduce 30.26% | 797,700 | $61.14 |
| Q2 2022 | -303,895 | Reduce 20.99% | 1.14 M | $34.14 |
| Q1 2022 | +22,391 | Add 1.57% | 1.45 M | $42.91 |
| Q4 2021 | -303,291 | Reduce 17.55% | 1.43 M | $79.97 |
| Q3 2021 | -339,800 | Reduce 16.43% | 1.73 M | $49.43 |
| Q2 2021 | -332,800 | Reduce 13.86% | 2.07 M | $47.50 |
| Q1 2021 | -568,300 | Reduce 19.14% | 2.4 M | $34.66 |
| Q4 2020 | +262,318 | Add 9.69% | 2.97 M | $29.76 |
| Q3 2020 | -147,900 | Reduce 5.18% | 2.71 M | $17.78 |
| Q2 2020 | -149,118 | Reduce 4.96% | 2.86 M | $14.90 |
| Q1 2020 | +289,700 | Add 10.67% | 3 M | $7.08 |
| Q4 2019 | -84,400 | Reduce 3.02% | 2.71 M | $8.00 |
| Q3 2019 | -221,800 | Reduce 7.34% | 2.8 M | $6.39 |
| Q2 2019 | +37,900 | Add 1.27% | 3.02 M | $6.56 |
| Q1 2019 | +76,900 | Add 2.65% | 2.98 M | $7.70 |
| Q4 2018 | +195,018 | Add 7.19% | 2.91 M | $9.75 |
| Q3 2018 | -14,200 | Reduce 0.52% | 2.71 M | $8.10 |
| Q2 2018 | -600 | Reduce 0.02% | 2.73 M | $7.80 |
| Q1 2018 | +86,500 | Add 3.28% | 2.73 M | $6.85 |
| Q4 2017 | -74,300 | Reduce 2.74% | 2.64 M | $5.95 |
| Q3 2017 | +87,482 | Add 3.33% | 2.71 M | $5.05 |
| Q2 2017 | +214,418 | Add 8.89% | 2.63 M | $6.85 |
| Q1 2017 | +43,400 | Add 1.83% | 2.41 M | $7.25 |
| Q4 2016 | +117,000 | Add 5.20% | 2.37 M | $7.70 |
| Q3 2016 | +124,900 | Add 5.87% | 2.25 M | $7.35 |
| Q2 2016 | +132,000 | Add 6.62% | 2.13 M | $6.91 |
| Q1 2016 | +205,400 | Add 11.48% | 1.99 M | $7.09 |
| Q4 2015 | +193,200 | Add 12.11% | 1.79 M | $7.87 |
| Q3 2015 | +186,200 | Add 13.21% | 1.6 M | $7.79 |
| Q2 2015 | +276,882 | Add 24.45% | 1.41 M | $7.61 |
| Q1 2015 | +179,600 | Add 18.85% | 1.13 M | $8.39 |
| Q4 2014 | +366,618 | Add 62.52% | 953,018 | $10.02 |
| Q3 2014 | -401,408 | Reduce 40.64% | 586,400 | $9.57 |
| Q2 2014 | -463,910 | Reduce 31.96% | 987,808 | $8.18 |
| Q1 2014 | +722,900 | Add 99.19% | 1.45 M | $8.43 |
| Q4 2013 | +280,700 | Add 62.64% | 728,818 | $9.64 |
| Q3 2013 | +90,800 | Add 25.41% | 448,118 | $12.73 |
| Q2 2013 | +357,318 | Add 0.00% | 357,318 | $10.10 |
Renaissance Technologies (RenTech)'s Calix Investment FAQs
Renaissance Technologies (RenTech) first purchased Calix, Inc. (CALX) in Q2 2013, acquiring 357,318 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 Calix, Inc. (CALX) for 53 quarters since Q2 2013.
Renaissance Technologies (RenTech)'s largest addition to Calix, Inc. (CALX) was in Q1 2014, adding 1,451,718 shares worth $12.24 M.
According to the latest 13F filing for Q2 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 548,118 shares of Calix, Inc. (CALX), valued at approximately $20.46 M.
As of the Q2 2026 filing, Calix, Inc. (CALX) represents approximately 0.03% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Calix, Inc. (CALX) was 3,020,718 shares, as reported at the end of Q2 2019.