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QLYS in the 13F filings

Qualys Inc · CUSIP 74758T303

Sector · Software and IT servicesTheme · Cloud and enterprise software· L3VLUP-definedTheme · Prepackaged software
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
26
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 7 listed it in both
Shares listed
5,079,200
combined, among listed positions
Reported value
$450m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 19 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +869,700.

Managers listing QLYS in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

26 of 26 holders

ActionFiling
AQR Capital Management LLC1,038,928$91munder 0.1%Added+405,45715 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP832,796$73munder 0.1%Added+465,95214 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC497,600$44m0.07%Added+17,30014 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC470,116$41munder 0.1%Trimmed-344,96127 Oct 2026 (the filing on sec.gov)
Invesco Ltd380,820$33munder 0.1%Added+4,41412 May 2026 (the filing on sec.gov)
Tudor Investment Corp250,885$22munder 0.1%Added+33,41015 May 2026 (the filing on sec.gov)
Millennium Management LLC235,382$21munder 0.1%Trimmed-9,94015 May 2026 (the filing on sec.gov)
Citadel Advisors LLC203,530$18munder 0.1%Added+160,32615 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC182,107$16munder 0.1%Added+66,75513 May 2026 (the filing on sec.gov)
Two Sigma Investments LP155,036$14munder 0.1%Trimmed-51,38915 May 2026 (the filing on sec.gov)
AllianceBernstein LP96,529$13munder 0.1%Added+4,34715 May 2026 (the filing on sec.gov)
Marshall Wace LLP143,501$13munder 0.1%Added+140,91015 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd126,189$11munder 0.1%Added+3,47418 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.125,112$11munder 0.1%Added+60,96215 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc113,677$10.0munder 0.1%Trimmed-65,87915 May 2026 (the filing on sec.gov)
Man Group PLC73,333$6.4munder 0.1%Added+3,56215 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP57,537$5.1munder 0.1%Added+43,34515 May 2026 (the filing on sec.gov)
Quantbot Technologies LP17,586$1.5m0.06%Trimmed-6813 May 2026 (the filing on sec.gov)
Caxton Associates LLP14,513$1.3munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Winton Group Ltd13,113$1.2munder 0.1%Added+5,22012 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP12,797$1.1munder 0.1%Added+4,98415 May 2026 (the filing on sec.gov)
Bridgewater Associates LP10,219$898kunder 0.1%Trimmed-13,38715 May 2026 (the filing on sec.gov)
Jane Street Group LLC9,861$866kunder 0.1%Newnew12 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)9,549$839kunder 0.1%Trimmed-3,96115 May 2026 (the filing on sec.gov)
Freestone Grove Partners LP8,466$744kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (4)

Exited (3)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
11 in Q3 2024 to 9 in Q2 2026

Tracked managers listing it, at least.

05101520182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
QLYS by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20131$1.4mn.a.n.a.
Q4 20131$13mn.a.n.a.
Q2 20141$2.9mn.a.n.a.
Q3 20141$3.0mn.a.n.a.
Q4 20141$974kn.a.n.a.
Q1 20151$787kn.a.n.a.
Q3 20152$19mn.a.n.a.
Q4 20151$3.4mn.a.n.a.
Q2 20161$39mn.a.n.a.
Q3 20162$41mn.a.n.a.
Q4 20162$54mn.a.n.a.
Q1 20172$118mn.a.n.a.
Q2 20172$134mn.a.n.a.
Q3 20173$205mn.a.n.a.
Q4 20172$244mn.a.n.a.
Q1 20184$318mn.a.n.a.
Q2 20185$346mn.a.n.a.
Q3 20183$320mn.a.n.a.
Q4 20183$247mn.a.n.a.
Q1 20192$248mn.a.n.a.
Q2 20193$202mn.a.n.a.
Q3 20194$200mn.a.n.a.
Q4 20194$240mn.a.n.a.
Q1 20207$257mn.a.n.a.
Q2 202010$372mn.a.n.a.
Q3 20207$288mn.a.n.a.
Q4 20207$370mn.a.n.a.
Q1 20215$280mn.a.n.a.
Q2 20217$266mn.a.n.a.
Q3 20216$346mn.a.n.a.
Q4 20218$426mn.a.n.a.
Q1 202211$455mn.a.n.a.
Q2 202210$386mn.a.n.a.
Q3 202211$475mn.a.n.a.
Q4 20229$350mn.a.n.a.
Q1 202310$359mn.a.n.a.
Q2 202311$329mn.a.n.a.
Q3 202312$403mn.a.n.a.
Q4 202314$620m96
Q1 202412$583m95
Q2 202413$528m95
Q3 202411$429m47
Q4 202413$366m68
Q1 202511$329m56
Q2 20259$409m55
Q3 20255$359m24
Q4 20257$269m1513
Q1 20266$158m1910
Q2 20269$563m1614

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

QLYS and GOOGL →QLYS and AMZN →QLYS and MSFT →Choose a stock to compare with QLYS →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own QLYS, latest filings →Back to the 13F Explorer →