Qualys, Inc.
MX ˙ BMV ˙ US74758T3032
SecurityMX:QLYS / Qualys, Inc.
InstitutionPrudential Financial Inc
Latest Disclosed Ownership6,370 shares
Latest Disclosed Value $ 559,605
Prudential Financial Inc reports 127.91% increase in ownership of QLYS / Qualys, Inc.

On May 13, 2026 - Prudential Financial Inc filed a 13F-HR form disclosing ownership of 6,370 shares of Qualys, Inc. (MX:QLYS) valued at $559,605 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,795 shares of Qualys, Inc.. This represents a change in shares of 127.91% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F QUALYS COM 74758T303 6,370 3,575 127.91 560 50.67 0.0004
2026-02-13 2025-12-31 13F QUALYS COM 74758T303 2,795 -2,677 -48.92 371 -48.76 0.0004
2025-11-13 2025-09-30 13F QUALYS COM 74758T303 5,472 -160 -2.84 724 -10.95 0.0009
2025-08-12 2025-06-30 13F QUALYS COM 74758T303 5,632 1,885 50.31 814 50.83 0.0011
2025-05-13 2025-03-31 13F QUALYS COM 74758T303 3,747 110 3.02 539 1.89 0.0008
2025-02-11 2024-12-31 13F QUALYS COM 74758T303 3,637 -2,965 -44.91 529 -35.96 0.0007
2024-11-14 2024-09-30 13F QUALYS COM 74758T303 6,602 1,002 17.89 826 3.51 0.0012
2024-08-13 2024-06-30 13F QUALYS COM 74758T303 5,600 631 12.70 799 -3.74 0.0012
2024-05-14 2024-03-31 13F QUALYS COM 74758T303 4,969 -324 -6.12 829 -20.13 0.0012
2024-02-13 2023-12-31 13F QUALYS COM 74758T303 5,293 565 11.95 1,039 43.97 0.0016
2023-11-13 2023-09-30 13F QUALYS COM 74758T303 4,728 -8,994 -65.54 721 -59.31 0.0011
2023-08-11 2023-06-30 13F QUALYS COM 74758T303 13,722 -10,802 -44.05 1,772 -44.42 0.0026
2023-05-12 2023-03-31 13F QUALYS COM 74758T303 24,524 -19,218 -43.93 3,189 -35.06 0.0050
2023-02-14 2022-12-31 13F QUALYS COM 74758T303 43,742 23,532 116.44 4,909 74.20 0.0083
2022-11-04 2022-09-30 13F QUALYS COM 74758T303 20,210 3,805 23.19 2,818 36.14 0.0048
2022-08-15 2022-06-30 13F QUALYS COM 74758T303 16,405 1,496 10.03 2,070 -2.50 0.0033
2022-05-13 2022-03-31 13F QUALYS COM 74758T303 14,909 3,698 32.99 2,123 38.04 0.0028
2022-02-14 2021-12-31 13F QUALYS COM 74758T303 11,211 472 4.40 1,538 20.06 0.0019
2021-11-15 2021-09-30 13F QUALYS COM 74758T303 10,739 -1,227 -10.25 1,281 6.40 0.0018
2021-08-16 2021-06-30 13F QUALYS COM 74758T303 11,966 -8,966 -42.83 1,204 -45.10 0.0017
2021-05-12 2021-03-31 13F QUALYS COM 74758T303 20,932 -19,970 -48.82 2,193 -56.01 0.0033
2021-08-16 2020-12-31 13F/A-1 QUALYS COM 0121 74758T303 40,902 40,701 20,249.25 4,985 24,825.00 0.0084
2021-02-16 2020-12-31 13F QUALYS COM 74758T303 40,902 40,701 4,985 0.0084
2021-08-05 2020-09-30 13F/A-1 QUALYS COM 74758T303 201 13 6.91 20 0.00 0.0029
2020-11-16 2020-09-30 13F QUALYS COM 74758T303 32,216 32,028 3,158 0.0060
2021-08-05 2020-06-30 13F/A-1 QUALYS COM 0104 74758T303 188 -3 -1.57 20 17.65 0.0037
2020-08-12 2020-06-30 13F QUALYS COM 74758T303 29,072 28,881 3,024 0.0058
2021-08-05 2020-03-31 13F/A-1 QUALYS COM 0086 74758T303 191 38 24.84 17 30.77 0.0044
2020-05-12 2020-03-31 13F QUALYS COM 74758T303 54,803 54,650 4,767 0.0106
2021-08-05 2019-12-31 13F/A-1 QUALYS COM 0083 74758T303 153 50 48.54 13 62.50 0.0034
2020-02-11 2019-12-31 13F QUALYS COM 74758T303 54,666 54,563 4,558 0.0068
2021-08-05 2019-09-30 13F/A-1 QUALYS COM 0075 74758T303 103 17 19.77 8 14.29 0.0026
2019-11-13 2019-09-30 13F QUALYS COM 74758T303 55,496 55,410 4,194 0.0067
2021-08-05 2019-06-30 13F/A-1 QUALYS COM 74758T303 86 53 160.61 7 133.33 0.0024
2019-08-08 2019-06-30 13F QUALYS COM 74758T303 56,314 56,281 4,904 0.0076
2021-08-05 2019-03-31 13F/A-1 QUALYS COM 74758T303 33 -96 -74.42 3 -70.00 0.0013
2019-05-15 2019-03-31 13F QUALYS COM 74758T303 56,678 56,549 4,690 0.0078
2021-08-05 2018-12-31 13F/A-1 QUALYS COM 74758T303 129 -86,779 -99.85 10 -99.87 0.0081
2019-02-07 2018-12-31 13F QUALYS COM 74758T303 75,193 -11,715 5,620 0.0099
2018-11-07 2018-09-30 13F QUALYS COM 74758T303 86,908 -144,906 -62.51 7,744 -60.37 0.0114
2018-08-13 2018-06-30 13F QUALYS COM 74758T303 231,814 -19,777 -7.86 19,541 6.76 0.0292
2018-05-04 2018-03-31 13F QUALYS COM 74758T303 251,591 29,807 13.44 18,304 39.07 0.0279
2018-02-13 2017-12-31 13F QUALYS COM 74758T303 221,784 169,194 321.72 13,162 383.19 0.0179
2017-11-02 2017-09-30 13F QUALYS COM 74758T303 52,590 1,920 3.79 2,724 31.79 0.0045
2017-08-07 2017-06-30 13F QUALYS COM 74758T303 50,670 -2,550 -4.79 2,067 2.48 0.0031
2017-05-10 2017-03-31 13F QUALYS COM 74758T303 53,220 1,010 1.93 2,017 22.09 0.0031
2017-02-07 2016-12-31 13F QUALYS COM 74758T303 52,210 -980 -1.84 1,652 -18.66 0.0027
2016-11-04 2016-09-30 13F QUALYS COM 74758T303 53,190 -11,570 -17.87 2,031 5.23 0.0034
2016-08-09 2016-06-30 13F QUALYS COM 74758T303 64,760 7,260 12.63 1,930 32.65 0.0032
2016-05-09 2016-03-31 13F QUALYS COM 74758T303 57,500 57,500 1,455 0.0026
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.