QUALYS INC (QLYS) Institutional Shareholders
QUALYS INC (QLYS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $5.04B in QLYS holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of QLYS tracked by InsiderSet, reporting ownership valued at approximately $792.32M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.05B, representing an estimated gain of +33.14% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 51% of the total disclosed QLYS value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in QUALYS INC (QLYS).
This page ranks the largest institutional QLYS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
422
Total Reported Value
$5.04B
Largest Holder
Blackrock, Inc.
Largest Position
$792.32M
Insider Transactions (90d)
48
Latest Filing Quarter
Q2 2026
New Institutional Positions
56
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 5,762,721 | $792,316,482 | $1,054,923,706 | +$262,607,224 | +33.14% | |
| Vanguard Portfolio Management Llc | 0.02% | 2,695,941 | $370,664,928 | $493,518,959 | +$122,854,031 | +33.14% | |
| Vanguard Capital Management Llc | 0.00% | 1,590,332 | $218,654,747 | $291,126,176 | +$72,471,429 | +33.14% | |
| State Street Corp | 0.01% | 1,456,158 | $200,207,163 | $266,564,283 | +$66,357,120 | +33.14% | |
| Legal & General Group Plc | 0.04% | 1,437,373 | $197,624,414 | $263,125,501 | +$65,501,087 | +33.14% | |
| Geode Capital Management, Llc | 0.01% | 1,409,583 | $193,825,739 | $258,038,264 | +$64,212,525 | +33.13% | |
| Aqr Capital Management Llc | 0.07% | 1,394,771 | $190,595,525 | $255,326,779 | +$64,731,254 | +33.96% | |
| First Trust Advisors Lp | 0.09% | 1,130,656 | $155,453,893 | $206,977,887 | +$51,523,994 | +33.14% | |
| Arrowstreet Capital, Limited Partnership | 0.06% | 985,345 | $135,475,084 | $180,377,256 | +$44,902,172 | +33.14% | |
| Boston Trust Walden Corp | 1.03% | 984,889 | $135,412,389 | $180,293,780 | +$44,881,391 | +33.14% | |
| Penserra Capital Management Llc | 0.82% | 780,069 | $107,251,000 | $142,799,431 | +$35,548,431 | +33.15% | |
| Millennium Management Llc | 0.07% | 762,709 | $104,864,860 | $139,621,510 | +$34,756,650 | +33.14% | |
| Dimensional Fund Advisors Lp | 0.02% | 719,248 | $98,858,523 | $131,665,539 | +$32,807,016 | +33.19% | |
| Morgan Stanley | 0.00% | 620,705 | $85,340,915 | $113,626,257 | +$28,285,342 | +33.14% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.09% | 553,737 | $76,062,215 | $101,367,095 | +$25,304,880 | +33.27% | |
| Rwa Wealth Partners, Llc | 0.72% | 548,756 | $75,448,462 | $100,455,273 | +$25,006,811 | +33.14% | |
| Clark Capital Management Group, Inc. | 0.41% | 543,703 | $74,753,726 | $99,530,271 | +$24,776,545 | +33.14% | |
| Acadian Asset Management Llc | 0.09% | 542,279 | $74,531,000 | $99,269,594 | +$24,738,594 | +33.19% | |
| Portolan Capital Management, Llc | 2.73% | 529,807 | $72,843,164 | $96,986,469 | +$24,143,305 | +33.14% | |
| Voya Investment Management Llc | 0.06% | 521,489 | $71,699,522 | $95,463,776 | +$23,764,254 | +33.14% | |
| Northern Trust Corp | 0.01% | 517,147 | $71,102,541 | $94,668,930 | +$23,566,389 | +33.14% | |
| Charles Schwab Investment Management Inc | 0.01% | 514,677 | $70,762,941 | $94,216,772 | +$23,453,831 | +33.14% | |
| London Co Of Virginia | 0.34% | 428,317 | $58,946,168 | $78,407,710 | +$19,461,542 | +33.02% | |
| Invesco Ltd. | 0.00% | 423,064 | $58,167,069 | $77,446,096 | +$19,279,027 | +33.14% | |
| Goldman Sachs Group Inc | 0.01% | 397,028 | $54,587,380 | $72,679,946 | +$18,092,566 | +33.14% | |
| Citadel Advisors Llc | 0.03% | 378,139 | $51,990,332 | $69,222,125 | +$17,231,793 | +33.14% | |
| Fort Washington Investment Advisors Inc | 0.25% | 368,865 | $50,715,249 | $67,524,427 | +$16,809,178 | +33.14% | |
| Point72 Asset Management, L.P. | 0.06% | 285,895 | $39,307,704 | $52,335,939 | +$13,028,235 | +33.14% | |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 284,100 | $39,060,909 | $52,007,346 | +$12,946,437 | +33.14% |
| Bank Of New York Mellon Corp | 0.01% | 283,980 | $39,044,415 | $51,985,379 | +$12,940,964 | +33.14% | |
| Jpmorgan Chase & Co | 0.00% | 291,681 | $37,631,123 | $53,395,124 | +$15,764,001 | +41.89% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 416,587 | $36,597,169 | $76,260,416 | +$39,663,247 | +108.38% | |
| Vanguard Fiduciary Trust Co | 0.01% | 253,640 | $34,872,964 | $46,431,338 | +$11,558,374 | +33.14% | |
| Ubs Group Ag | 0.01% | 244,220 | $33,577,808 | $44,706,913 | +$11,129,105 | +33.14% | |
| Cdam (Uk) Ltd | 7.80% | 219,862 | $30,228,826 | $40,247,938 | +$10,019,112 | +33.14% | |
| Envestnet Asset Management Inc | 0.01% | 213,213 | $29,314,590 | $39,030,772 | +$9,716,182 | +33.14% | |
| Retirement Systems Of Alabama | 0.07% | 174,089 | $23,935,497 | $31,868,732 | +$7,933,235 | +33.14% | |
| Canada Life Assurance Co | 0.04% | 173,779 | $23,865,000 | $31,811,984 | +$7,946,984 | +33.30% | |
| Bank Of America Corp | 0.00% | 158,937 | $21,852,247 | $29,095,007 | +$7,242,760 | +33.14% | |
| Principal Financial Group Inc | 0.01% | 148,346 | $20,396,092 | $27,156,219 | +$6,760,127 | +33.14% | |
| Wellington Management Group Llp | 0.00% | 141,444 | $19,447,136 | $25,892,739 | +$6,445,603 | +33.14% | |
| Bnp Paribas Financial Markets | 0.01% | 137,450 | $18,898,000 | $25,161,597 | +$6,263,597 | +33.14% | |
| Systematic Financial Management Lp | 0.35% | 126,828 | $17,437,864 | $23,217,134 | +$5,779,270 | +33.14% | |
| Russell Investments Group, Ltd. | 0.01% | 124,779 | $16,357,985 | $22,842,044 | +$6,484,059 | +39.64% | |
| Fisher Asset Management, Llc | 0.00% | 114,929 | $15,801,681 | $21,038,903 | +$5,237,222 | +33.14% | |
| Nuveen, Llc | 0.00% | 112,516 | $15,469,825 | $20,597,179 | +$5,127,354 | +33.14% | |
| Tributary Capital Management, Llc | 1.27% | 112,278 | $15,437,102 | $20,553,611 | +$5,116,509 | +33.14% | |
| Vontobel Holding Ltd. | 0.05% | 107,542 | $14,785,950 | $19,686,639 | +$4,900,689 | +33.14% | |
| Rhumbline Advisers | 0.01% | 106,980 | $14,708,651 | $19,583,759 | +$4,875,108 | +33.14% | |
| Cullinan Associates Inc | 1.07% | 102,800 | $14,133,972 | $18,818,568 | +$4,684,596 | +33.14% |
Frequently asked questions about QLYS
Who owns the most QLYS stock?
The largest holders of QLYS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for QUALYS INC (QLYS).
Is QLYS widely held by superinvestors?
Many widely followed stocks like QLYS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly QLYS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.