Renaissance Technologies (RenTech)'s QLYS Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 480,300 shares of Qualys, Inc. (QLYS) worth $63.83 M, representing 0.10% of the portfolio. First purchased in 2015-Q1, this long-term strategic position has been held for 42 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in QLYS, representing a significant commitment to this investment thesis. Largest addition occurred in Q1 2016, adding 321,400 shares. Largest reduction occurred in Q1 2019, reducing 250,100 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Qualys (QLYS) Holding Value Over Time
Track share changes against reported price movement
Quarterly Qualys (QLYS) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +24,600 | Add 5.40% | 480,300 | $132.90 |
| Q3 2025 | +95,300 | Add 26.44% | 455,700 | $132.33 |
| Q2 2025 | -21,900 | Reduce 5.73% | 360,400 | $142.87 |
| Q1 2025 | +6,200 | Add 1.65% | 382,300 | $125.93 |
| Q4 2024 | -33,700 | Reduce 8.22% | 376,100 | $140.22 |
| Q3 2024 | -64,300 | Reduce 13.56% | 409,800 | $128.46 |
| Q2 2024 | +63,000 | Add 15.32% | 474,100 | $142.60 |
| Q1 2024 | +253,500 | Add 160.85% | 411,100 | $166.87 |
| Q4 2023 | +34,300 | Add 27.82% | 157,600 | $196.28 |
| Q3 2023 | -14,300 | Reduce 10.39% | 123,300 | $152.55 |
| Q2 2023 | -31,600 | Reduce 18.68% | 137,600 | $0.13 |
| Q1 2023 | -142,500 | Reduce 45.72% | 169,200 | $0.13 |
| Q4 2022 | +79,000 | Add 33.95% | 311,700 | $0.11 |
| Q3 2022 | +46,800 | Add 25.17% | 232,700 | $139.39 |
| Q2 2022 | +141,300 | Add 316.82% | 185,900 | $126.14 |
| Q1 2022 | +31,000 | Add 227.94% | 44,600 | $142.40 |
| Q4 2021 | -66,100 | Reduce 82.94% | 13,600 | $137.21 |
| Q3 2021 | +79,700 | New Buy | 79,700 | $111.29 |
| Q1 2021 | -101,900 | Sold Out | 0 | $0.00 |
| Q4 2020 | -229,300 | Reduce 69.23% | 101,900 | $121.87 |
| Q3 2020 | -180,200 | Reduce 35.24% | 331,200 | $98.01 |
| Q2 2020 | +298,300 | Add 139.98% | 511,400 | $104.02 |
| Q1 2020 | -196,300 | Reduce 47.95% | 213,100 | $86.99 |
| Q4 2019 | -43,500 | Reduce 9.60% | 409,400 | $83.37 |
| Q3 2019 | +54,000 | Add 13.54% | 452,900 | $75.57 |
| Q2 2019 | -230,000 | Reduce 36.57% | 398,900 | $87.08 |
| Q1 2019 | -250,100 | Reduce 28.45% | 628,900 | $82.74 |
| Q4 2018 | -179,600 | Reduce 16.97% | 879,000 | $74.74 |
| Q3 2018 | -247,600 | Reduce 18.96% | 1.06 M | $89.10 |
| Q2 2018 | -182,000 | Reduce 12.23% | 1.31 M | $84.30 |
| Q1 2018 | +187,500 | Add 14.42% | 1.49 M | $72.75 |
| Q4 2017 | +185,200 | Add 16.60% | 1.3 M | $59.35 |
| Q3 2017 | +92,500 | Add 9.04% | 1.12 M | $51.80 |
| Q2 2017 | +105,100 | Add 11.45% | 1.02 M | $40.80 |
| Q1 2017 | +186,000 | Add 25.41% | 917,900 | $37.90 |
| Q4 2016 | +116,100 | Add 18.85% | 731,900 | $31.65 |
| Q3 2016 | +93,400 | Add 17.88% | 615,800 | $38.19 |
| Q2 2016 | +100,000 | Add 23.67% | 522,400 | $29.81 |
| Q1 2016 | +321,400 | Add 318.22% | 422,400 | $25.31 |
| Q4 2015 | +101,000 | New Buy | 101,000 | $33.09 |
| Q2 2015 | -10,900 | Sold Out | 0 | $0.00 |
| Q1 2015 | +10,900 | New Buy | 10,900 | $46.51 |
Renaissance Technologies (RenTech)'s Qualys Investment FAQs
Renaissance Technologies (RenTech) first purchased Qualys, Inc. (QLYS) in Q1 2015, acquiring 10,900 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 Qualys, Inc. (QLYS) for 42 quarters since Q1 2015.
Renaissance Technologies (RenTech)'s largest addition to Qualys, Inc. (QLYS) was in Q1 2016, adding 422,400 shares worth $10.69 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 480,300 shares of Qualys, Inc. (QLYS), valued at approximately $63.83 M.
As of the Q4 2025 filing, Qualys, Inc. (QLYS) represents approximately 0.10% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Qualys, Inc. (QLYS) was 1,488,200 shares, as reported at the end of Q1 2018.