Company · Ownership research

QUALYS, INC. QLYS

CIK 0001107843 · CUSIP 74758T303

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 74758T303 (QLYS), not CUSIP 74758T903 (QLYS), and does not merge CUSIPs.

This page lists the top 20 of 425 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$470.93M 5,360,596 shares	0.01%	-12.50K(-0.20%)Reduced	SEC filing ↗ May 13, 2026	▾
02	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$222.89M 2,537,126 shares	0.01%	—	SEC filing ↗ May 8, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$139.21M 1,584,606 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
04	STATE STREET CORP CIK 93751 · View history	$122.00M 1,388,720 shares	0.00%	+40.63K(+3.00%)Added	SEC filing ↗ May 15, 2026	▾
05	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$116.06M 1,320,909 shares	0.01%	+64.91K(+5.20%)Added	SEC filing ↗ May 15, 2026	▾
06	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$90.84M 1,038,928 shares	0.04%	+405.46K(+64.00%)Added	SEC filing ↗ May 15, 2026	▾
07	Legal & General Group Plc CIK 764068 · View history	$90.45M 1,029,587 shares	0.02%	-126.83K(-11.00%)Reduced	SEC filing ↗ May 8, 2026	▾
08	Boston Trust Walden Corp CIK 1534866 · View history	$88.76M 1,010,376 shares	0.73%	-93.51K(-8.50%)Reduced	SEC filing ↗ Apr 24, 2026	▾
09	FIRST TRUST ADVISORS LP CIK 1125816 · View history	$87.50M 996,064 shares	0.06%	-376.52K(-27.40%)Reduced	SEC filing ↗ May 13, 2026	▾
10	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$73.16M 832,796 shares	0.04%	+465.95K(+127.00%)Added	SEC filing ↗ May 14, 2026	▾
11	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$67.04M 763,099 shares	0.01%	+45.72K(+6.40%)Added	SEC filing ↗ May 7, 2026	▾
12	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$66.89M 760,842 shares	0.00%	+272.15K(+55.70%)Added	SEC filing ↗ May 13, 2026	▾
13	Penserra Capital Management LLC CIK 1593324 · View history	$64.35M 732,504 shares	0.75%	+185.43K(+33.90%)Added	SEC filing ↗ May 11, 2026	▾
14	MORGAN STANLEY CIK 895421 · View history	$56.79M 646,426 shares	0.00%	-45.37K(-6.60%)Reduced	SEC filing ↗ May 15, 2026	▾
15	RWA WEALTH PARTNERS, LLC CIK 1544576 · View history	$48.21M 548,760 shares	0.53%	-39.99K(-6.80%)Reduced	SEC filing ↗ May 13, 2026	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$44.85M 510,546 shares	0.01%	-2.10K(-0.40%)Reduced	SEC filing ↗ May 14, 2026	▾
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$44.14M 502,419 shares	0.01%	+32.11K(+6.80%)Added	SEC filing ↗ May 15, 2026	▾
18	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$43.71M 497,600 shares	0.07%	+17.30K(+3.60%)Added	SEC filing ↗ May 14, 2026	▾
19	NEUBERGER BERMAN GROUP LLC CIK 1465109 · Amended · View history	$41.30M 470,116 shares	0.03%	-344.96K(-42.30%)Reduced	SEC filing ↗ Oct 27, 2026	▾
20	CDAM (UK) Ltd CIK 1719387 · View history	$41.20M 469,001 shares	9.14%	+82.35K(+21.30%)Added	SEC filing ↗ May 14, 2026	▾

Showing 20 / 425 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

425

Cancelled or null records excluded

Disclosed shares

37,001,273

Not deduplicated across managers

Disclosed value

$3.26B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

QUALYS, INC. · Q1 2026

Explore all 425 reporting institutions.

This page includes 20 of 425 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.