QLYS US Equity

QUALYS, INC.

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Information Technology · Services-Prepackaged Software · CIK 1107843 · FYE 1231

$135.13

-0.62 (-0.46%)

USD · as of 2026-07-29 · marketstack

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Institutional ownership· 13F filers holding QLYS · 2026-Q1 methodology → sources →

418 holders

% of shares outstanding held

104.6%

Shares held (13F)

36,842,918

Reporting holders

418

Institutional 13F holdings sum to 104.6% of shares outstanding. Readings above 100% reflect securities-lending double counting: shares on loan to short sellers are reported long by both the lending institution and the one that bought them. FINRA short interest of 4,712,786 shares (settlement 2026-04-30) accounts for the excess.

Top holders

largest 100 of 418 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	5,360,5965.4M	$471M	15.22%	—
2	VANGUARD PORTFOLIO MANAGEMENT LLC	2,537,1262.5M	$223M	7.20%	NEW†
3	VANGUARD CAPITAL MANAGEMENT LLC	1,584,6061.6M	$139M	4.50%	NEW†
4	STATE STREET CORP	1,388,7201.4M	$122M	3.94%	ADD 3%
5	GEODE CAPITAL MANAGEMENT, LLC	1,320,9091.3M	$116M	3.75%	ADD 5%
6	AQR CAPITAL MANAGEMENT LLC	1,038,9281.0M	$91M	2.95%	ADD 64%
7	Legal & General Group Plc	1,029,5871.0M	$90M	2.92%	TRIM -11%
8	Boston Trust Walden Corp	1,010,3761.0M	$89M	2.87%	TRIM -8%
9	FIRST TRUST ADVISORS LP	996,064996,064	$88M	2.83%	TRIM -27%
10	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	832,796832,796	$73M	2.36%	ADD 127%
11	DIMENSIONAL FUND ADVISORS LP	763,099763,099	$67M	2.17%	ADD 6%
12	JPMORGAN CHASE & CO	760,842760,842	$67M	2.16%	ADD 56%
13	Penserra Capital Management LLC	732,504732,504	$64M	2.08%	ADD 34%
14	MORGAN STANLEY	646,426646,426	$57M	1.84%	TRIM -7%
15	RWA WEALTH PARTNERS, LLC	548,760548,760	$48M	1.56%	TRIM -7%
16	NORTHERN TRUST CORP	510,546510,546	$45M	1.45%	—
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	502,419502,419	$44M	1.43%	ADD 7%
18	RENAISSANCE TECHNOLOGIES LLC	497,600497,600	$44M	1.41%	ADD 4%
19	NEUBERGER BERMAN GROUP LLC	470,116470,116	$41M	1.33%	TRIM -42%
20	CDAM (UK) Ltd	469,001469,001	$41M	1.33%	ADD 21%
21	LONDON CO OF VIRGINIA	466,342466,342	$41M	1.32%	ADD 20%
22	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	438,572438,572	$39M	1.25%	ADD 4%
23	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	416,587416,587	$37M	1.18%	TRIM -3%
24	Invesco Ltd.	380,820380,820	$33M	1.08%	—
25	Clark Capital Management Group, Inc.	380,459380,459	$33M	1.08%	ADD 5%
26	GOLDMAN SACHS GROUP INC	324,180324,180	$28M	0.92%	TRIM -5%
27	Bank of New York Mellon Corp	318,287318,287	$28M	0.90%	TRIM -4%
28	Alyeska Investment Group, L.P.	304,677304,677	$27M	0.87%	NEW
29	VOYA INVESTMENT MANAGEMENT LLC	297,355297,355	$26M	0.84%	ADD 3%
30	TUDOR INVESTMENT CORP ET AL	250,885250,885	$22M	0.71%	ADD 15%
31	VANGUARD FIDUCIARY TRUST CO	250,359250,359	$22M	0.71%	NEW
32	FORT WASHINGTON INVESTMENT ADVISORS INC /OH/	243,872243,872	$21M	0.69%	ADD 17%
33	Portolan Capital Management, LLC	239,028239,028	$21M	0.68%	ADD 361%
34	MILLENNIUM MANAGEMENT LLC	235,382235,382	$21M	0.67%	TRIM -4%
35	Fundsmith LLPtracked	226,077226,077	$20M	0.64%	TRIM -65%
36	BNP PARIBAS FINANCIAL MARKETS	208,624208,624	$18M	0.59%	TRIM -11%
37	ENVESTNET ASSET MANAGEMENT INC	207,674207,674	$18M	0.59%	ADD 38%
38	BANK OF AMERICA CORP /DE/	206,645206,645	$18M	0.59%	TRIM -24%
39	CITADEL ADVISORS LLC	203,530203,530	$18M	0.58%	ADD 371%
40	UBS Group AG	194,217194,217	$17M	0.55%	ADD 70%
41	CANADA LIFE ASSURANCE Co	188,726188,726	$17M	0.54%	ADD 22%
42	AMERIPRISE FINANCIAL INC	183,972183,972	$16M	0.52%	ADD 3%
43	ACADIAN ASSET MANAGEMENT LLC	182,107182,107	$16M	0.52%	ADD 58%
44	Retirement Systems of Alabama	181,626181,626	$16M	0.52%	—
45	FEDERATED HERMES, INC.	180,260180,260	$16M	0.51%	ADD 4%
46	NORDEA INVESTMENT MANAGEMENT AB	168,031168,031	$14M	0.48%	ADD 34%
47	Trexquant Investment LP	156,021156,021	$14M	0.44%	ADD 115%
48	TWO SIGMA INVESTMENTS, LP	155,036155,036	$14M	0.44%	TRIM -25%
49	ALLIANCEBERNSTEIN L.P.	96,52996,529	$13M	0.27%	ADD 5%
50	MARSHALL WACE, LLP	143,501143,501	$13M	0.41%	ADD 5438%
51	PRINCIPAL FINANCIAL GROUP INC	140,317140,317	$12M	0.40%	ADD 19%
52	BARCLAYS PLC	135,527135,527	$12M	0.38%	ADD 16%
53	JANUS HENDERSON GROUP PLC	126,189126,189	$11M	0.36%	ADD 3%
54	D. E. Shaw & Co., Inc.	125,112125,112	$11M	0.36%	ADD 95%
55	OBERWEIS ASSET MANAGEMENT INC/	118,900118,900	$10M	0.34%	ADD 10%
56	Fisher Asset Management, LLC	116,182116,182	$10M	0.33%	TRIM -2%
57	SYSTEMATIC FINANCIAL MANAGEMENT LP	114,026114,026	$10M	0.32%	NEW
58	PRICE T ROWE ASSOCIATES INC /MD/	113,677113,677	$10M	0.32%	TRIM -37%
59	Gotham Asset Management, LLC	110,607110,607	$10M	0.31%	ADD 43%
60	RHUMBLINE ADVISERS	103,852103,852	$9M	0.29%	—
61	Tributary Capital Management, LLC	103,157103,157	$9M	0.29%	ADD 1743%
62	CULLINAN ASSOCIATES INC	102,800102,800	$9M	0.29%	—
63	DEUTSCHE BANK AG\	101,340101,340	$9M	0.29%	TRIM -17%
64	Vident Advisory, LLC	97,28397,283	$9M	0.28%	ADD 3%
65	Nuveen, LLC	95,03595,035	$8M	0.27%	ADD 13%
66	Janney Montgomery Scott LLC	89,70089,700	$8M	0.25%	ADD 3%
67	WINMILL & CO. INC	88,64188,641	$8M	0.25%	NEW
68	AMERICAN CAPITAL MANAGEMENT INC	83,75283,752	$7M	0.24%	TRIM -79%
69	CITIGROUP INC	81,52481,524	$7M	0.23%	ADD 11%
70	Robeco Institutional Asset Management B.V.	76,60176,601	$7M	0.22%	ADD 16%
71	California Public Employees Retirement System	75,88075,880	$7M	0.22%	TRIM -22%
72	TEACHER RETIREMENT SYSTEM OF TEXAS	75,70775,707	$7M	0.21%	ADD 47%
73	Vontobel Holding Ltd.	75,25275,252	$7M	0.21%	TRIM -6%
74	Man Group plc	73,33373,333	$6M	0.21%	ADD 5%
75	Swiss National Bank	71,20071,200	$6M	0.20%	—
76	AMERICAN CENTURY COMPANIES INC	68,67768,677	$6M	0.20%	TRIM -37%
77	VICTORY CAPITAL MANAGEMENT INC	66,45566,455	$6M	0.19%	ADD 111%
78	BI Asset Management Fondsmaeglerselskab A/S	62,97362,973	$6M	0.18%	ADD 77%
79	SG Americas Securities, LLC	62,67162,671	$6M	0.18%	ADD 88%
80	Park State Asset Management	58,12358,123	$5M	0.17%	ADD 19%
81	SUSQUEHANNA INTERNATIONAL GROUP, LLP	57,53757,537	$5M	0.16%	ADD 305%
82	Qube Research & Technologies Ltd	55,20055,200	$5M	0.16%	ADD 233%
83	HERALD INVESTMENT MANAGEMENT Ltd	55,00055,000	$5M	0.16%	TRIM -15%
84	LPL Financial LLC	54,16154,161	$5M	0.15%	TRIM -38%
85	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	50,23850,238	$4M	0.14%	—
86	WELLS FARGO & COMPANY/MN	48,83448,834	$4M	0.14%	TRIM -32%
87	Russell Investments Group, Ltd.	47,89447,894	$4M	0.14%	ADD 76%
88	RENAISSANCE GROUP LLC	47,82747,827	$4M	0.14%	ADD 16%
89	NICHOLAS COMPANY, INC.	47,32647,326	$4M	0.13%	—
90	SEI INVESTMENTS CO	47,29547,295	$4M	0.13%	ADD 29%
91	Y-Intercept (Hong Kong) Ltd	47,19447,194	$4M	0.13%	ADD 540%
92	Public Sector Pension Investment Board	47,07047,070	$4M	0.13%	NEW
93	Asset Management One Co., Ltd.	45,26245,262	$4M	0.13%	ADD 3%
94	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	42,31742,317	$4M	0.12%	ADD 24%
95	HUSSMAN STRATEGIC ADVISORS, INC.	42,00042,000	$4M	0.12%	ADD 150%
96	VAN ECK ASSOCIATES CORP	41,00041,000	$4M	0.12%	ADD 4%
97	Nutshell Asset Management Ltd	40,64440,644	$4M	0.12%	NEW
98	ROYAL BANK OF CANADA	40,20740,207	$4M	0.11%	ADD 12%
99	THIRD AVENUE MANAGEMENT LLC	39,12039,120	$3M	0.11%	NEW
100	Quadrature Capital Ltd	38,35238,352	$3M	0.11%	NEW

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

5.9M

5.7M

5.6M

5.5M

5.4M

$471M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

2.5M

$223M

VANGUARD CAPITAL MANAGEMENT LLC

—

1.6M

$139M

STATE STREET CORP

1.4M

1.3M

1.4M

$122M

GEODE CAPITAL MANAGEMENT, LLC

1.3M

1.2M

1.3M

$116M

AQR CAPITAL MANAGEMENT LLC

350K

689K

1.0M

633K

1.0M

$91M

Legal & General Group Plc

955K

986K

1.1M

1.2M

1.0M

$90M

Boston Trust Walden Corp

1.0M

1.1M

1.0M

$89M

FIRST TRUST ADVISORS LP

920K

1.1M

1.4M

996K

$88M

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

52K

37K

73K

94K

367K

833K

$73M

DIMENSIONAL FUND ADVISORS LP

664K

669K

681K

696K

717K

763K

$67M

JPMORGAN CHASE & CO

565K

491K

522K

1.1M

489K

761K

$67M

Penserra Capital Management LLC

326K

499K

545K

516K

547K

733K

$64M

MORGAN STANLEY

944K

858K

944K

732K

692K

646K

$57M

RWA WEALTH PARTNERS, LLC

—

611K

589K

549K

$48M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	418	36,842,918	104.6%	$3.2B
2025-Q4

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · QLYS

Large holders — 13G, passive (top 4 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	14%	QII	2025-03-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	7.19%	QII	2026-03-31	SEC →
VANGUARD CAPITAL MANAGEMENT LLC	5.2%	QII	2026-03-31	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

Source: SEC Schedule 13D/13G structured XML. 13D = active intent; 13G filers report passively (Rule 13d-1(b) QII / 13d-1(c) Passive / 13d-1(d) Exempt) and are not activists. Percent and delta are the group aggregate the filing reports. Structured 13D/G coverage begins December 2024 (SEC XML mandate).

Institutional ownership· 13F filers holding QLYS · 2026-Q1 methodology → sources →

418 holders

% of shares outstanding held

104.6%

Shares held (13F)

36,842,918

Reporting holders

418

Top holders

largest 100 of 418 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	5,360,5965.4M	$471M	15.22%	—
2	VANGUARD PORTFOLIO MANAGEMENT LLC	2,537,1262.5M	$223M	7.20%	NEW†
3	VANGUARD CAPITAL MANAGEMENT LLC	1,584,6061.6M	$139M	4.50%	NEW†
4	STATE STREET CORP	1,388,7201.4M	$122M	3.94%	ADD 3%
5	GEODE CAPITAL MANAGEMENT, LLC	1,320,9091.3M	$116M	3.75%	ADD 5%
6	AQR CAPITAL MANAGEMENT LLC	1,038,9281.0M	$91M	2.95%	ADD 64%
7	Legal & General Group Plc	1,029,5871.0M	$90M	2.92%	TRIM -11%
8	Boston Trust Walden Corp	1,010,3761.0M	$89M	2.87%	TRIM -8%
9	FIRST TRUST ADVISORS LP	996,064996,064	$88M	2.83%	TRIM -27%
10	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	832,796832,796	$73M	2.36%	ADD 127%
11	DIMENSIONAL FUND ADVISORS LP	763,099763,099	$67M	2.17%	ADD 6%
12	JPMORGAN CHASE & CO	760,842760,842	$67M	2.16%	ADD 56%
13	Penserra Capital Management LLC	732,504732,504	$64M	2.08%	ADD 34%
14	MORGAN STANLEY	646,426646,426	$57M	1.84%	TRIM -7%
15	RWA WEALTH PARTNERS, LLC	548,760548,760	$48M	1.56%	TRIM -7%
16	NORTHERN TRUST CORP	510,546510,546	$45M	1.45%	—
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	502,419502,419	$44M	1.43%	ADD 7%
18	RENAISSANCE TECHNOLOGIES LLC	497,600497,600	$44M	1.41%	ADD 4%
19	NEUBERGER BERMAN GROUP LLC	470,116470,116	$41M	1.33%	TRIM -42%
20	CDAM (UK) Ltd	469,001469,001	$41M	1.33%	ADD 21%
21	LONDON CO OF VIRGINIA	466,342466,342	$41M	1.32%	ADD 20%
22	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	438,572438,572	$39M	1.25%	ADD 4%
23	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	416,587416,587	$37M	1.18%	TRIM -3%
24	Invesco Ltd.	380,820380,820	$33M	1.08%	—
25	Clark Capital Management Group, Inc.	380,459380,459	$33M	1.08%	ADD 5%
26	GOLDMAN SACHS GROUP INC	324,180324,180	$28M	0.92%	TRIM -5%
27	Bank of New York Mellon Corp	318,287318,287	$28M	0.90%	TRIM -4%
28	Alyeska Investment Group, L.P.	304,677304,677	$27M	0.87%	NEW
29	VOYA INVESTMENT MANAGEMENT LLC	297,355297,355	$26M	0.84%	ADD 3%
30	TUDOR INVESTMENT CORP ET AL	250,885250,885	$22M	0.71%	ADD 15%
31	VANGUARD FIDUCIARY TRUST CO	250,359250,359	$22M	0.71%	NEW
32	FORT WASHINGTON INVESTMENT ADVISORS INC /OH/	243,872243,872	$21M	0.69%	ADD 17%
33	Portolan Capital Management, LLC	239,028239,028	$21M	0.68%	ADD 361%
34	MILLENNIUM MANAGEMENT LLC	235,382235,382	$21M	0.67%	TRIM -4%
35	Fundsmith LLPtracked	226,077226,077	$20M	0.64%	TRIM -65%
36	BNP PARIBAS FINANCIAL MARKETS	208,624208,624	$18M	0.59%	TRIM -11%
37	ENVESTNET ASSET MANAGEMENT INC	207,674207,674	$18M	0.59%	ADD 38%
38	BANK OF AMERICA CORP /DE/	206,645206,645	$18M	0.59%	TRIM -24%
39	CITADEL ADVISORS LLC	203,530203,530	$18M	0.58%	ADD 371%
40	UBS Group AG	194,217194,217	$17M	0.55%	ADD 70%
41	CANADA LIFE ASSURANCE Co	188,726188,726	$17M	0.54%	ADD 22%
42	AMERIPRISE FINANCIAL INC	183,972183,972	$16M	0.52%	ADD 3%
43	ACADIAN ASSET MANAGEMENT LLC	182,107182,107	$16M	0.52%	ADD 58%
44	Retirement Systems of Alabama	181,626181,626	$16M	0.52%	—
45	FEDERATED HERMES, INC.	180,260180,260	$16M	0.51%	ADD 4%
46	NORDEA INVESTMENT MANAGEMENT AB	168,031168,031	$14M	0.48%	ADD 34%
47	Trexquant Investment LP	156,021156,021	$14M	0.44%	ADD 115%
48	TWO SIGMA INVESTMENTS, LP	155,036155,036	$14M	0.44%	TRIM -25%
49	ALLIANCEBERNSTEIN L.P.	96,52996,529	$13M	0.27%	ADD 5%
50	MARSHALL WACE, LLP	143,501143,501	$13M	0.41%	ADD 5438%
51	PRINCIPAL FINANCIAL GROUP INC	140,317140,317	$12M	0.40%	ADD 19%
52	BARCLAYS PLC	135,527135,527	$12M	0.38%	ADD 16%
53	JANUS HENDERSON GROUP PLC	126,189126,189	$11M	0.36%	ADD 3%
54	D. E. Shaw & Co., Inc.	125,112125,112	$11M	0.36%	ADD 95%
55	OBERWEIS ASSET MANAGEMENT INC/	118,900118,900	$10M	0.34%	ADD 10%
56	Fisher Asset Management, LLC	116,182116,182	$10M	0.33%	TRIM -2%
57	SYSTEMATIC FINANCIAL MANAGEMENT LP	114,026114,026	$10M	0.32%	NEW
58	PRICE T ROWE ASSOCIATES INC /MD/	113,677113,677	$10M	0.32%	TRIM -37%
59	Gotham Asset Management, LLC	110,607110,607	$10M	0.31%	ADD 43%
60	RHUMBLINE ADVISERS	103,852103,852	$9M	0.29%	—
61	Tributary Capital Management, LLC	103,157103,157	$9M	0.29%	ADD 1743%
62	CULLINAN ASSOCIATES INC	102,800102,800	$9M	0.29%	—
63	DEUTSCHE BANK AG\	101,340101,340	$9M	0.29%	TRIM -17%
64	Vident Advisory, LLC	97,28397,283	$9M	0.28%	ADD 3%
65	Nuveen, LLC	95,03595,035	$8M	0.27%	ADD 13%
66	Janney Montgomery Scott LLC	89,70089,700	$8M	0.25%	ADD 3%
67	WINMILL & CO. INC	88,64188,641	$8M	0.25%	NEW
68	AMERICAN CAPITAL MANAGEMENT INC	83,75283,752	$7M	0.24%	TRIM -79%
69	CITIGROUP INC	81,52481,524	$7M	0.23%	ADD 11%
70	Robeco Institutional Asset Management B.V.	76,60176,601	$7M	0.22%	ADD 16%
71	California Public Employees Retirement System	75,88075,880	$7M	0.22%	TRIM -22%
72	TEACHER RETIREMENT SYSTEM OF TEXAS	75,70775,707	$7M	0.21%	ADD 47%
73	Vontobel Holding Ltd.	75,25275,252	$7M	0.21%	TRIM -6%
74	Man Group plc	73,33373,333	$6M	0.21%	ADD 5%
75	Swiss National Bank	71,20071,200	$6M	0.20%	—
76	AMERICAN CENTURY COMPANIES INC	68,67768,677	$6M	0.20%	TRIM -37%
77	VICTORY CAPITAL MANAGEMENT INC	66,45566,455	$6M	0.19%	ADD 111%
78	BI Asset Management Fondsmaeglerselskab A/S	62,97362,973	$6M	0.18%	ADD 77%
79	SG Americas Securities, LLC	62,67162,671	$6M	0.18%	ADD 88%
80	Park State Asset Management	58,12358,123	$5M	0.17%	ADD 19%
81	SUSQUEHANNA INTERNATIONAL GROUP, LLP	57,53757,537	$5M	0.16%	ADD 305%
82	Qube Research & Technologies Ltd	55,20055,200	$5M	0.16%	ADD 233%
83	HERALD INVESTMENT MANAGEMENT Ltd	55,00055,000	$5M	0.16%	TRIM -15%
84	LPL Financial LLC	54,16154,161	$5M	0.15%	TRIM -38%
85	BNP PARIBAS ASSET MANAGEMENT Holding S.A.	50,23850,238	$4M	0.14%	—
86	WELLS FARGO & COMPANY/MN	48,83448,834	$4M	0.14%	TRIM -32%
87	Russell Investments Group, Ltd.	47,89447,894	$4M	0.14%	ADD 76%
88	RENAISSANCE GROUP LLC	47,82747,827	$4M	0.14%	ADD 16%
89	NICHOLAS COMPANY, INC.	47,32647,326	$4M	0.13%	—
90	SEI INVESTMENTS CO	47,29547,295	$4M	0.13%	ADD 29%
91	Y-Intercept (Hong Kong) Ltd	47,19447,194	$4M	0.13%	ADD 540%
92	Public Sector Pension Investment Board	47,07047,070	$4M	0.13%	NEW
93	Asset Management One Co., Ltd.	45,26245,262	$4M	0.13%	ADD 3%
94	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	42,31742,317	$4M	0.12%	ADD 24%
95	HUSSMAN STRATEGIC ADVISORS, INC.	42,00042,000	$4M	0.12%	ADD 150%
96	VAN ECK ASSOCIATES CORP	41,00041,000	$4M	0.12%	ADD 4%
97	Nutshell Asset Management Ltd	40,64440,644	$4M	0.12%	NEW
98	ROYAL BANK OF CANADA	40,20740,207	$4M	0.11%	ADD 12%
99	THIRD AVENUE MANAGEMENT LLC	39,12039,120	$3M	0.11%	NEW
100	Quadrature Capital Ltd	38,35238,352	$3M	0.11%	NEW

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

5.9M

5.7M

5.6M

5.5M

5.4M

$471M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

2.5M

$223M

VANGUARD CAPITAL MANAGEMENT LLC

—

1.6M

$139M

STATE STREET CORP

1.4M

1.3M

1.4M

$122M

GEODE CAPITAL MANAGEMENT, LLC

1.3M

1.2M

1.3M

$116M

AQR CAPITAL MANAGEMENT LLC

350K

689K

1.0M

633K

1.0M

$91M

Legal & General Group Plc

955K

986K

1.1M

1.2M

1.0M

$90M

Boston Trust Walden Corp

1.0M

1.1M

1.0M

$89M

FIRST TRUST ADVISORS LP

920K

1.1M

1.4M

996K

$88M

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

52K

37K

73K

94K

367K

833K

$73M

DIMENSIONAL FUND ADVISORS LP

664K

669K

681K

696K

717K

763K

$67M

JPMORGAN CHASE & CO

565K

491K

522K

1.1M

489K

761K

$67M

Penserra Capital Management LLC

326K

499K

545K

516K

547K

733K

$64M

MORGAN STANLEY

944K

858K

944K

732K

692K

646K

$57M

RWA WEALTH PARTNERS, LLC

—

611K

589K

549K

$48M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	418	36,842,918	104.6%	$3.2B
2025-Q4

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · QLYS

Large holders — 13G, passive (top 4 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	14%	QII	2025-03-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	7.19%	QII	2026-03-31	SEC →
VANGUARD CAPITAL MANAGEMENT LLC	5.2%	QII	2026-03-31	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

QLYS US Equity☆

Institutional ownership· 13F filers holding QLYS · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · QLYS

Institutional ownership· 13F filers holding QLYS · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · QLYS

QLYS US Equity