Qualys, Inc.
MX ˙ BMV ˙ US74758T3032
SecurityMX:QLYS / Qualys, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership96,529 shares
Latest Disclosed Value $ 12,828,704
Alliancebernstein L.p. reports 4.72% increase in ownership of QLYS / Qualys, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 96,529 shares of Qualys, Inc. (MX:QLYS) valued at $12,828,704 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 92,182 shares of Qualys, Inc.. This represents a change in shares of 4.72% 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)
2026-05-15 2026-03-31 13F QUALYS COM 74758T303 96,529 4,347 4.72 12,829 4.72 0.0042
2026-02-17 2025-12-31 13F QUALYS COM 74758T303 92,182 2,977 3.34 12,251 3.78 0.0039
2025-11-14 2025-09-30 13F QUALYS COM 74758T303 89,205 -6,426 -6.72 11,804 -13.60 0.0037
2025-08-14 2025-06-30 13F QUALYS COM 74758T303 95,631 -5,345 -5.29 13,663 7.45 0.0045
2025-05-15 2025-03-31 13F QUALYS COM 74758T303 100,976 -582 -0.57 12,716 -10.71 0.0046
2025-02-12 2024-12-31 13F QUALYS COM 74758T303 101,558 -11,507 -10.18 14,240 -1.96 0.0048
2024-11-14 2024-09-30 13F QUALYS COM 74758T303 113,065 -2,133 -1.85 14,524 -11.58 0.0049
2024-08-14 2024-06-30 13F QUALYS COM 74758T303 115,198 11,563 11.16 16,427 -5.01 0.0057
2024-05-14 2024-03-31 13F QUALYS COM 74758T303 103,635 -2,929 -2.75 17,294 -17.32 0.0061
2024-02-14 2023-12-31 13F QUALYS COM 74758T303 106,564 -5,503 -4.91 20,916 22.35 0.0080
2023-11-14 2023-09-30 13F QUALYS COM 74758T303 112,067 1,630 1.48 17,096 19.84 0.0073
2023-08-15 2023-06-30 13F QUALYS COM 74758T303 110,437 -2,505 -2.22 14,265 -2.85 0.0058
2023-05-15 2023-03-31 13F QUALYS COM 74758T303 112,942 -1,459 -1.28 14,685 14.37 0.0063
2023-02-15 2022-12-31 13F QUALYS COM 74758T303 114,401 1,319 1.17 12,839 -18.54 0.0058
2022-11-15 2022-09-30 13F QUALYS COM 74758T303 113,082 968 0.86 15,762 11.46 0.0076
2022-08-15 2022-06-30 13F QUALYS COM 74758T303 112,114 32,530 40.88 14,142 24.78 0.0065
2022-05-13 2022-03-31 13F QUALYS COM 74758T303 79,584 -9,361 -10.52 11,334 -7.14 0.0044
2022-02-14 2021-12-31 13F QUALYS COM 74758T303 88,945 2,360 2.73 12,205 26.66 0.0043
2021-11-10 2021-09-30 13F QUALYS COM 74758T303 86,585 -10,961 -11.24 9,636 -1.89 0.0038
2021-07-30 2021-06-30 13F QUALYS COM 74758T303 97,546 8,281 9.28 9,822 5.01 0.0039
2021-05-06 2021-03-31 13F QUALYS COM 74758T303 89,265 953 1.08 9,353 -13.10 0.0041
2021-02-08 2020-12-31 13F QUALYS COM 74758T303 88,312 -1,168 -1.31 10,763 22.73 0.0051
2020-11-12 2020-09-30 13F QUALYS COM 74758T303 89,480 -2,495 -2.71 8,770 -8.33 0.0047
2020-08-13 2020-06-30 13F QUALYS COM 74758T303 91,975 30,410 49.39 9,567 78.62 0.0056
2020-05-14 2020-03-31 13F QUALYS COM 74758T303 61,565 440 0.72 5,356 5.10 0.0038
2020-02-18 2019-12-31 13F QUALYS COM 74758T303 61,125 305 0.50 5,096 10.88 0.0029
2019-11-14 2019-09-30 13F QUALYS COM 74758T303 60,820 -6,790 -10.04 4,596 -21.93 0.0029
2019-08-14 2019-06-30 13F QUALYS COM 74758T303 67,610 13,370 24.65 5,887 31.17 0.0037
2019-05-14 2019-03-31 13F QUALYS COM 74758T303 54,240 4,980 10.11 4,488 21.89 0.0029
2019-02-13 2018-12-31 13F QUALYS COM 74758T303 49,260 1,115 2.32 3,682 -14.17 0.0027
2018-11-08 2018-09-30 13F QUALYS COM 74758T303 48,145 0 0.00 4,290 5.69 0.0028
2018-08-13 2018-06-30 13F QUALYS COM 74758T303 48,145 -2,323 -4.60 4,059 10.54 0.0028
2018-05-14 2018-03-31 13F QUALYS COM 74758T303 50,468 5,800 12.98 3,672 38.51 0.0027
2018-02-13 2017-12-31 13F QUALYS COM 74758T303 44,668 -6,100 -12.02 2,651 0.80 0.0019
2017-11-13 2017-09-30 13F QUALYS COM 74758T303 50,768 0 0.00 2,630 26.99 0.0020
2017-08-10 2017-06-30 13F QUALYS COM 74758T303 50,768 10,083 24.78 2,071 34.31 0.0016
2017-05-11 2017-03-31 13F QUALYS COM 74758T303 40,685 -425 -1.03 1,542 18.52 0.0012
2017-02-13 2016-12-31 13F QUALYS COM 74758T303 41,110 -1,290 -3.04 1,301 -19.64 0.0011
2016-11-10 2016-09-30 13F QUALYS COM 74758T303 42,400 -3,300 -7.22 1,619 18.87 0.0014
2016-08-11 2016-06-30 13F QUALYS COM 74758T303 45,700 8,700 23.51 1,362 45.51 0.0012
2016-05-13 2016-03-31 13F QUALYS COM 74758T303 37,000 700 1.93 936 -22.06 0.0008
2016-02-16 2015-12-31 13F/A-1 QUALYS COM 74758T303 36,300 -1,061 -2.84 1,201 12.98 0.0010
2016-02-12 2015-12-31 13F QUALYS COM 74758T303 36,300 1,033
2015-11-13 2015-09-30 13F QUALYS COM 74758T303 37,361 261 0.70 1,063 -28.99 0.0009
2015-08-14 2015-06-30 13F QUALYS COM 74758T303 37,100 6,200 20.06 1,497 4.25 0.0012
2015-05-13 2015-03-31 13F QUALYS COM 74758T303 30,900 2,300 8.04 1,436 32.96 0.0012
2015-02-13 2014-12-31 13F QUALYS COM 74758T303 28,600 0 0.00 1,080 41.92 0.0009
2014-11-13 2014-09-30 13F QUALYS COM 74758T303 28,600 23,600 472.00 761 494.53 0.0006
2014-08-13 2014-06-30 13F QUALYS COM 74758T303 5,000 4,200 525.00 128 540.00 0.0001
2014-05-13 2014-03-31 13F QUALYS COM 74758T303 800 800 -50.00 20 -23.08 0.0000
2013-11-14 2013-09-30 13F QUALYS COM 74758T303 0 -1,600 -100.00 0 -100.00
2013-08-13 2013-06-30 13F QUALYS COM 74758T303 1,600 1,600 26 0.0000
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.