Qualys, Inc.
US ˙ NasdaqGS ˙ US74758T3032

SecurityQLYS / Qualys, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership20,786 shares
Latest Disclosed Value $ 1,826,050
Engineers Gate Manager LP reports 37.77% increase in ownership of QLYS / Qualys, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 20,786 shares of Qualys, Inc. (US:QLYS) valued at $1,826,050 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,087 shares of Qualys, Inc.. This represents a change in shares of 37.77% during the quarter. The current value of the position is $2,319,925 USD.

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 20,786 5,699 37.77 1,826 -8.93 0.0228
2026-02-17 2025-12-31 13F QUALYS COM 74758T303 15,087 10,024 197.99 2,005 199.70 0.0238
2025-11-14 2025-09-30 13F QUALYS COM 74758T303 5,063 -6,468 -56.09 670 -59.38 0.0077
2025-08-14 2025-06-30 13F QUALYS COM 74758T303 11,531 11,531 1,647 0.0205
2025-05-15 2025-03-31 13F QUALYS COM 74758T303 0 -15,987 -100.00 0 -100.00
2025-02-14 2024-12-31 13F QUALYS COM 74758T303 15,987 11,280 239.64 2,242 271.03 0.0390
2024-11-14 2024-09-30 13F QUALYS COM 74758T303 4,707 -11,312 -70.62 605 -73.56 0.0118
2024-08-14 2024-06-30 13F QUALYS COM 74758T303 16,019 1,535 10.60 2,284 -5.46 0.0515
2024-05-15 2024-03-31 13F QUALYS COM 74758T303 14,484 12,258 550.67 2,417 454.13 0.0636
2024-02-14 2023-12-31 13F QUALYS COM 74758T303 2,226 -2,691 -54.73 437 -41.87 0.0125
2023-11-14 2023-09-30 13F QUALYS COM 74758T303 4,917 -1,221 -19.89 750 -5.30 0.0277
2023-08-14 2023-06-30 13F QUALYS COM 74758T303 6,138 3,405 124.59 793 123.10 0.0300
2023-05-15 2023-03-31 13F QUALYS COM 74758T303 2,733 -2,414 -46.90 355 -38.47 0.0148
2023-02-14 2022-12-31 13F QUALYS COM 74758T303 5,147 3,604 233.57 578 168.37 0.0347
2022-11-14 2022-09-30 13F QUALYS COM 74758T303 1,543 -1,339 -46.46 215 -40.93 0.0134
2022-08-15 2022-06-30 13F QUALYS COM 74758T303 2,882 1,010 53.95 364 36.33 0.0133
2022-05-16 2022-03-31 13F QUALYS COM 74758T303 1,872 -3,593 -65.75 267 -64.40 0.0104
2022-02-14 2021-12-31 13F QUALYS COM 74758T303 5,465 578 11.83 750 37.87 0.0337
2021-11-15 2021-09-30 13F QUALYS COM 74758T303 4,887 -11,716 -70.57 544 -67.46 0.0310
2021-08-16 2021-06-30 13F QUALYS COM 74758T303 16,603 16,603 1,672 0.1075
2021-05-17 2021-03-31 13F QUALYS COM 74758T303 0 -3,254 -100.00 0 -100.00
2021-02-16 2020-12-31 13F QUALYS COM 74758T303 3,254 865 36.21 397 69.66 0.0172
2020-11-16 2020-09-30 13F QUALYS COM 74758T303 2,389 -5,484 -69.66 234 -71.43 0.0110
2020-08-17 2020-06-30 13F QUALYS COM 74758T303 7,873 7,873 229.55 819 250.00 0.0417
2020-05-15 2020-03-31 13F QUALYS COM 74758T303 0 -10,236 -100.00 0 -100.00
2020-02-14 2019-12-31 13F QUALYS COM 74758T303 10,236 10,236 853 0.0375
2015-08-14 2015-06-30 13F QUALYS COM 74758T303 0 -16,444 -100.00 0 -100.00
2015-05-15 2015-03-31 13F QUALYS COM 74758T303 16,444 16,444 764 0.1016
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.