Who owns ZWS (ZWS)
Which tracked institutional funds hold ZWS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ZWS 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
87 tracked funds added or opened ZWS while 88 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
ZWS’s largest tracked holder by dollar value, BlackRock, 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 ZWS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ZWS 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 421 tracked filers holding ZWS, 221 increased or opened the position and 186 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 ZWS 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 33
- VANGUARD PORTFOLIO MANAGEMENT LLC$397M
- VANGUARD CAPITAL MANAGEMENT LLC$313M
- VANGUARD FIDUCIARY TRUST CO$47M
- Driehaus Capital Management LLC$40M
- CIBC Bancorp USA Inc.$20M
- TWO SIGMA INVESTMENTS, LP$16M
Full exits 12
- VANGUARD GROUP INC$767M
- CIBC Private Wealth Group LLC$22M
- Point72 Asset Management, L.P.$13M
- Informed Momentum Co LLC$7M
- WINTON GROUP Ltd$6M
- Gallo Partners, LP$5M
Largest adds
- GOLDMAN SACHS GROUP INC$43M
- T. Rowe Price Investment Management, Inc.$33M
- UBS Group AG$29M
- JANE STREET GROUP, LLC$23M
- MILLENNIUM MANAGEMENT LLC$23M
- Qube Research & Technologies Ltd$21M
Largest trims
- BlackRock, Inc.$198M
- KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC$76M
- Invesco Ltd.$64M
- NORGES BANK$57M
- Crescent Grove Advisors, LLC$48M
- JANUS HENDERSON GROUP PLC$29M
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 | 20,197,029 | $906M | 12.3% | 2026-Q1 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC trimmed | 10,850,567 | $487M | 6.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 8,856,306 | $397M | 5.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 6,987,370 | $313M | 4.3% | 2026-Q1 |
| STATE STREET CORP added | 5,636,375 | $253M | 3.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 5,620,799 | $252M | 3.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 4,417,248 | $198M | 2.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,646,072 | $164M | 2.2% | 2026-Q1 |
| BECK MACK & OLIVER LLC trimmed | 3,497,990 | $157M | 2.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 3,195,863 | $149M | 2.0% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC trimmed | 3,303,293 | $148M | 2.0% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 3,078,224 | $138M | 1.9% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,916,087 | $131M | 1.8% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 2,806,370 | $126M | 1.7% | 2026-Q1 |
| Impax Asset Management Group plc trimmed | 2,609,142 | $117M | 1.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,563,031 | $115M | 1.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 2,085,932 | $94M | 1.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 1,907,162 | $86M | 1.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,901,935 | $85M | 1.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,797,602 | $81M | 1.1% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 1,774,315 | $80M | 1.1% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 1,677,269 | $75M | 1.0% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 1,485,173 | $66M | 0.9% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 1,347,639 | $60M | 0.8% | 2026-Q1 |
| Crescent Grove Advisors, LLC trimmed | 1,334,775 | $60M | 0.8% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 1,269,203 | $57M | 0.8% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 1,247,419 | $56M | 0.8% | 2026-Q1 |
| NORGES BANK trimmed | 1,646,431 | $54M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 1,088,776 | $49M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 1,040,348 | $47M | 0.6% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 1,031,082 | $46M | 0.6% | 2026-Q1 |
| UBS Group AG added | 1,016,213 | $46M | 0.6% | 2026-Q1 |
| Amundi trimmed | 903,588 | $41M | 0.6% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 922,073 | $40M | 0.5% | 2026-Q1 |
| Driehaus Capital Management LLC trimmed | 897,614 | $40M | 0.5% | 2026-Q1 |
| Fisher Asset Management, LLC trimmed | 889,432 | $40M | 0.5% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 841,673 | $38M | 0.5% | 2026-Q1 |
| BROWN ADVISORY INC trimmed | 822,625 | $37M | 0.5% | 2026-Q1 |
| DekaBank Deutsche Girozentrale | 800,000 | $36M | 0.5% | 2026-Q1 |
| Legal & General Group Plc trimmed | 768,311 | $34M | 0.5% | 2026-Q1 |
| Nuveen, LLC trimmed | 698,806 | $31M | 0.4% | 2026-Q1 |
| FMR LLC added | 659,605 | $30M | 0.4% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 657,421 | $29M | 0.4% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 574,498 | $26M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 540,617 | $24M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board added | 531,054 | $24M | 0.3% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 520,703 | $23M | 0.3% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 518,353 | $23M | 0.3% | 2026-Q1 |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ added | 496,639 | $22M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 472,639 | $21M | 0.3% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 455,834 | $20M | 0.3% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 445,155 | $20M | 0.3% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 443,276 | $20M | 0.3% | 2026-Q1 |
| CIBC Bancorp USA Inc. added | 441,251 | $20M | 0.3% | 2026-Q1 |
| Select Equity Group, L.P. added | 429,185 | $19M | 0.3% | 2026-Q1 |
| JENNISON ASSOCIATES LLC trimmed | 410,841 | $18M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 398,369 | $18M | 0.2% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 384,793 | $17M | 0.2% | 2026-Q1 |
| Trexquant Investment LP added | 376,075 | $17M | 0.2% | 2026-Q1 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 352,183 | $16M | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 346,173 | $16M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System added | 324,733 | $15M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 311,788 | $14M | 0.2% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 310,572 | $14M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 298,000 | $13M | 0.2% | 2026-Q1 |
| MAI Capital Management added | 293,787 | $13M | 0.2% | 2026-Q1 |
| Verition Fund Management LLC added | 252,247 | $11M | 0.2% | 2026-Q1 |
| SEI INVESTMENTS CO added | 248,631 | $11M | 0.2% | 2026-Q1 |
| Perpetual Ltd trimmed | 242,640 | $11M | 0.1% | 2026-Q1 |
| KBC Group NV added | 222,989 | $10M | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 201,885 | $9M | 0.1% | 2026-Q1 |
| BESSEMER GROUP INC added | 191,600 | $9M | 0.1% | 2026-Q1 |
| Mariner, LLC trimmed | 191,178 | $9M | 0.1% | 2026-Q1 |
| PEREGRINE CAPITAL MANAGEMENT LLC trimmed | 189,251 | $8M | 0.1% | 2026-Q1 |
| Fiera Capital Corp added | 182,536 | $8M | 0.1% | 2026-Q1 |
| Zurcher Kantonalbank (Zurich Cantonalbank) trimmed | 175,213 | $8M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 172,405 | $8M | 0.1% | 2026-Q1 |
| HUNTINGTON NATIONAL BANK trimmed | 170,675 | $8M | 0.1% | 2026-Q1 |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO added | 170,060 | $8M | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 169,091 | $8M | 0.1% | 2026-Q1 |
| MIROVA added | 167,277 | $8M | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 166,123 | $7M | 0.1% | 2026-Q1 |
| LBP AM SA trimmed | 162,155 | $7M | 0.1% | 2026-Q1 |
| Candriam S.C.A. added | 160,164 | $7M | 0.1% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND new | 158,655 | $7M | 0.1% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 154,331 | $7M | 0.1% | 2026-Q1 |
| Man Group plc added | 153,741 | $7M | 0.1% | 2026-Q1 |
| Janney Montgomery Scott LLC trimmed | 152,471 | $7M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 152,145 | $7M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 16,497,478 | $767M | 10.5% | 2025-Q4 stale |
| MACQUARIE GROUP LTD added | 7,477,566 | $310M | 4.2% | 2025-Q3 stale |
| Zimmer Partners, LP trimmed | 1,197,400 | $44M | 0.6% | 2025-Q2 stale |
| J. W. Coons Advisors, LLC | 688,164 | $25M | 0.3% | 2025-Q2 stale |
| CIBC Private Wealth Group LLC trimmed | 465,919 | $22M | 0.3% | 2025-Q4 stale |
| Point72 Asset Management, L.P. new | 286,510 | $13M | 0.2% | 2025-Q4 stale |
| LORD, ABBETT & CO. LLC new | 250,000 | $12M | 0.2% | 2025-Q3 stale |
| Thematics Asset Management | 197,277 | $9M | 0.1% | 2025-Q3 stale |
| Fortress Investment Group LLC added | 214,542 | $8M | 0.1% | 2025-Q2 stale |
| SOROS FUND MANAGEMENT LLC new | 225,370 | $7M | 0.1% | 2025-Q1 stale |
| Informed Momentum Co LLC trimmed | 155,011 | $7M | 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.