Who owns QLYS (QLYS)
Which tracked institutional funds hold QLYS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See QLYS company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
68 tracked funds added or opened QLYS while 193 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
QLYS’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes QLYS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in QLYS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 420 tracked filers holding QLYS, 247 increased or opened the position and 212 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in QLYS between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 32
- VANGUARD PORTFOLIO MANAGEMENT LLC$223M
- VANGUARD CAPITAL MANAGEMENT LLC$139M
- Alyeska Investment Group, L.P.$27M
- VANGUARD FIDUCIARY TRUST CO$22M
- SYSTEMATIC FINANCIAL MANAGEMENT LP$10M
- WINMILL & CO. INC$8M
Full exits 28
- VANGUARD GROUP INC$573M
- FULLER & THALER ASSET MANAGEMENT, INC.$79M
- NORRIS PERNE & FRENCH LLP/MI$15M
- TWO SIGMA ADVISERS, LP$11M
- BLAIR WILLIAM & CO/IL$6M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$6M
Largest adds
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$24M
- Portolan Capital Management, LLC$14M
- MARSHALL WACE, LLP$12M
- CITADEL ADVISORS LLC$12M
- Tributary Capital Management, LLC$8M
- Pacer Advisors, Inc.$6M
Largest trims
- BlackRock, Inc.$428M
- FIRST TRUST ADVISORS LP$95M
- NEUBERGER BERMAN GROUP LLC$67M
- Fundsmith LLP$66M
- Legal & General Group Plc$63M
- Boston Trust Walden Corp$58M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 3,261,555 | $287M | 8.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,537,126 | $223M | 6.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,584,606 | $139M | 3.9% | 2026-Q1 |
| STATE STREET CORP added | 1,388,720 | $122M | 3.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,320,909 | $116M | 3.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 1,034,819 | $90M | 2.5% | 2026-Q1 |
| Legal & General Group Plc trimmed | 1,029,587 | $90M | 2.5% | 2026-Q1 |
| Boston Trust Walden Corp trimmed | 1,010,376 | $89M | 2.5% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 996,064 | $88M | 2.4% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 832,796 | $73M | 2.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 763,099 | $67M | 1.9% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 760,842 | $67M | 1.9% | 2026-Q1 |
| Pacer Advisors, Inc. added | 1,093,119 | $65M | 1.8% | 2026-Q1 |
| Penserra Capital Management LLC added | 732,504 | $64M | 1.8% | 2026-Q1 |
| MORGAN STANLEY trimmed | 646,426 | $57M | 1.6% | 2026-Q1 |
| RWA WEALTH PARTNERS, LLC trimmed | 548,760 | $48M | 1.3% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 510,546 | $45M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 502,419 | $44M | 1.2% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 497,600 | $44M | 1.2% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 470,116 | $41M | 1.1% | 2026-Q1 |
| CDAM (UK) Ltd added | 469,001 | $41M | 1.1% | 2026-Q1 |
| LONDON CO OF VIRGINIA added | 466,342 | $41M | 1.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 438,572 | $39M | 1.1% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 416,587 | $37M | 1.0% | 2026-Q1 |
| Clark Capital Management Group, Inc. added | 380,459 | $33M | 0.9% | 2026-Q1 |
| Invesco Ltd. trimmed | 342,767 | $30M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 324,180 | $28M | 0.8% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 318,287 | $28M | 0.8% | 2026-Q1 |
| Alyeska Investment Group, L.P. trimmed | 304,677 | $27M | 0.7% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 297,355 | $26M | 0.7% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 250,885 | $22M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 250,359 | $22M | 0.6% | 2026-Q1 |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ added | 243,872 | $21M | 0.6% | 2026-Q1 |
| Portolan Capital Management, LLC added | 239,028 | $21M | 0.6% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 235,382 | $21M | 0.6% | 2026-Q1 |
| Fundsmith LLP trimmed | 226,077 | $20M | 0.6% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 208,624 | $18M | 0.5% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 207,674 | $18M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 206,645 | $18M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 203,530 | $18M | 0.5% | 2026-Q1 |
| UBS Group AG added | 194,217 | $17M | 0.5% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co added | 188,726 | $17M | 0.5% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 183,972 | $16M | 0.4% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 182,107 | $16M | 0.4% | 2026-Q1 |
| Retirement Systems of Alabama added | 181,626 | $16M | 0.4% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 180,260 | $16M | 0.4% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB added | 168,031 | $14M | 0.4% | 2026-Q1 |
| Trexquant Investment LP added | 156,021 | $14M | 0.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 155,036 | $14M | 0.4% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 96,529 | $13M | 0.4% | 2026-Q1 |
| MARSHALL WACE, LLP added | 143,501 | $13M | 0.4% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 140,317 | $12M | 0.3% | 2026-Q1 |
| BARCLAYS PLC added | 135,527 | $12M | 0.3% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 126,189 | $11M | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 125,112 | $11M | 0.3% | 2026-Q1 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 118,900 | $10M | 0.3% | 2026-Q1 |
| Fisher Asset Management, LLC trimmed | 116,182 | $10M | 0.3% | 2026-Q1 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP new | 114,026 | $10M | 0.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 113,677 | $10M | 0.3% | 2026-Q1 |
| Gotham Asset Management, LLC added | 110,607 | $10M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 103,852 | $9M | 0.3% | 2026-Q1 |
| Tributary Capital Management, LLC added | 103,157 | $9M | 0.3% | 2026-Q1 |
| CULLINAN ASSOCIATES INC | 102,800 | $9M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 101,340 | $9M | 0.2% | 2026-Q1 |
| Vident Advisory, LLC added | 97,283 | $9M | 0.2% | 2026-Q1 |
| NORGES BANK trimmed | 67,653 | $9M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 95,035 | $8M | 0.2% | 2026-Q1 |
| Janney Montgomery Scott LLC added | 89,700 | $8M | 0.2% | 2026-Q1 |
| WINMILL & CO. INC new | 88,641 | $8M | 0.2% | 2026-Q1 |
| AMERICAN CAPITAL MANAGEMENT INC trimmed | 83,752 | $7M | 0.2% | 2026-Q1 |
| CITIGROUP INC added | 81,524 | $7M | 0.2% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. added | 76,601 | $7M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 75,880 | $7M | 0.2% | 2026-Q1 |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 75,707 | $7M | 0.2% | 2026-Q1 |
| Vontobel Holding Ltd. trimmed | 75,252 | $7M | 0.2% | 2026-Q1 |
| Man Group plc added | 73,333 | $6M | 0.2% | 2026-Q1 |
| Swiss National Bank | 71,200 | $6M | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 68,677 | $6M | 0.2% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 66,455 | $6M | 0.2% | 2026-Q1 |
| BI Asset Management Fondsmaeglerselskab A/S added | 62,973 | $6M | 0.2% | 2026-Q1 |
| SG Americas Securities, LLC added | 62,671 | $6M | 0.2% | 2026-Q1 |
| Park State Asset Management added | 58,123 | $5M | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 57,537 | $5M | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 55,200 | $5M | 0.1% | 2026-Q1 |
| HERALD INVESTMENT MANAGEMENT Ltd trimmed | 55,000 | $5M | 0.1% | 2026-Q1 |
| LPL Financial LLC trimmed | 54,161 | $5M | 0.1% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 50,238 | $4M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 4,310,598 | $573M | 15.9% | 2025-Q4 stale |
| FULLER & THALER ASSET MANAGEMENT, INC. new | 591,358 | $79M | 2.2% | 2025-Q4 stale |
| Point72 Asset Management, L.P. added | 138,300 | $20M | 0.5% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC added | 134,271 | $19M | 0.5% | 2025-Q2 stale |
| NORRIS PERNE & FRENCH LLP/MI trimmed | 112,826 | $15M | 0.4% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 82,800 | $11M | 0.3% | 2025-Q4 stale |
| Clearbridge Investments, LLC trimmed | 82,165 | $11M | 0.3% | 2025-Q3 stale |
| Corebridge Financial, Inc. trimmed | 58,358 | $7M | 0.2% | 2025-Q1 stale |
| AXA Investment Managers S.A. new | 52,075 | $7M | 0.2% | 2025-Q3 stale |
| BLAIR WILLIAM & CO/IL added | 47,958 | $6M | 0.2% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 43,161 | $6M | 0.2% | 2025-Q4 stale |
| Summit Creek Advisors LLC trimmed | 34,590 | $5M | 0.1% | 2025-Q4 stale |
| Grandeur Peak Global Advisors, LLC trimmed | 33,263 | $4M | 0.1% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.