Who owns ZG (ZG)
Which tracked institutional funds hold ZG, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ZG 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
The tracked-fund tape on ZG is one-sided between 2025-Q4 and 2026-Q1: 85 added or opened and 276 trimmed or exited — on balance reducing.
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
ZG’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 0.1% of theirs — a 0.1pp gap the other way — the median holder sizes ZG more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ZG 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 546 tracked filers holding ZG, 304 increased or opened the position and 311 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 ZG 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 35
- VANGUARD PORTFOLIO MANAGEMENT LLC$743M
- VANGUARD CAPITAL MANAGEMENT LLC$404M
- VANGUARD FIDUCIARY TRUST CO$57M
- COATUE MANAGEMENT LLC$44M
- KAHN BROTHERS GROUP INC$23M
- WORLDQUANT MILLENNIUM ADVISORS LLC$19M
Full exits 50
- VANGUARD GROUP INC$1.9B
- M&T Bank Corp$317M
- Contour Asset Management LLC$222M
- Altimeter Capital Management, LP$149M
- SOMA EQUITY PARTNERS LP$122M
- Davidson Kempner Capital Management LP$41M
Largest adds
- GOLDMAN SACHS GROUP INC$49M
- STATE OF WISCONSIN INVESTMENT BOARD$39M
- D. E. Shaw & Co., Inc.$31M
- AQR CAPITAL MANAGEMENT LLC$26M
- BALYASNY ASSET MANAGEMENT L.P.$26M
- Quantinno Capital Management LP$20M
Largest trims
- Caledonia (Private) Investments Pty Ltd$1.0B
- FMR LLC$700M
- BlackRock, Inc.$559M
- Independent Franchise Partners LLP$226M
- Ninety One UK Ltd$165M
- TIGER GLOBAL MANAGEMENT LLC$136M
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 |
|---|---|---|---|---|
| Caledonia (Private) Investments Pty Ltd trimmed | 11,370,543 | $471M | 7.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 7,501,846 | $310M | 4.7% | 2026-Q1 |
| BlackRock, Inc. trimmed | 4,460,393 | $185M | 2.8% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,949,276 | $163M | 2.5% | 2026-Q1 |
| STATE STREET CORP added | 3,876,050 | $160M | 2.4% | 2026-Q1 |
| EMINENCE CAPITAL, LP added | 3,445,538 | $143M | 2.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,439,812 | $142M | 2.2% | 2026-Q1 |
| Capital World Investors trimmed | 3,081,931 | $128M | 1.9% | 2026-Q1 |
| Independent Franchise Partners LLP added | 2,738,482 | $113M | 1.7% | 2026-Q1 |
| Technology Crossover Management VIII, Ltd. | 2,735,000 | $113M | 1.7% | 2026-Q1 |
| Dorsal Capital Management, LP trimmed | 2,450,000 | $101M | 1.5% | 2026-Q1 |
| FMR LLC trimmed | 2,404,197 | $99M | 1.5% | 2026-Q1 |
| Technology Crossover Management XI, Ltd. | 2,338,036 | $97M | 1.5% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 2,068,039 | $86M | 1.3% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,896,206 | $78M | 1.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,801,267 | $75M | 1.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,773,234 | $73M | 1.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,691,185 | $70M | 1.1% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 1,551,106 | $63M | 1.0% | 2026-Q1 |
| Greencape Capital Pty Ltd trimmed | 1,447,853 | $60M | 0.9% | 2026-Q1 |
| L1 Capital Pty Ltd trimmed | 1,269,328 | $53M | 0.8% | 2026-Q1 |
| SCGE MANAGEMENT, L.P. trimmed | 1,264,900 | $52M | 0.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 1,073,503 | $44M | 0.7% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 1,040,889 | $43M | 0.7% | 2026-Q1 |
| TIGER GLOBAL MANAGEMENT LLC | 1,023,733 | $42M | 0.6% | 2026-Q1 |
| BAILLIE GIFFORD & CO added | 965,525 | $40M | 0.6% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 950,227 | $39M | 0.6% | 2026-Q1 |
| Park West Asset Management LLC trimmed | 861,580 | $36M | 0.5% | 2026-Q1 |
| UBS Group AG trimmed | 835,637 | $35M | 0.5% | 2026-Q1 |
| GLENVIEW CAPITAL MANAGEMENT, LLC trimmed | 789,670 | $33M | 0.5% | 2026-Q1 |
| COATUE MANAGEMENT LLC | 739,700 | $31M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 685,279 | $28M | 0.4% | 2026-Q1 |
| Quantinno Capital Management LP added | 641,618 | $27M | 0.4% | 2026-Q1 |
| Walleye Capital LLC added | 636,331 | $26M | 0.4% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 610,589 | $25M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp added | 605,749 | $25M | 0.4% | 2026-Q1 |
| Jain Global LLC added | 599,905 | $25M | 0.4% | 2026-Q1 |
| NZS Capital, LLC added | 584,883 | $24M | 0.4% | 2026-Q1 |
| MORGAN STANLEY added | 569,698 | $24M | 0.4% | 2026-Q1 |
| HARVARD MANAGEMENT CO INC added | 562,045 | $23M | 0.4% | 2026-Q1 |
| KAHN BROTHERS GROUP INC new | 545,212 | $23M | 0.3% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. added | 498,076 | $21M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 491,834 | $20M | 0.3% | 2026-Q1 |
| Valiant Capital Management, L.P. added | 473,329 | $20M | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 466,796 | $19M | 0.3% | 2026-Q1 |
| Fayez Sarofim & Co added | 429,778 | $18M | 0.3% | 2026-Q1 |
| WORLDQUANT MILLENNIUM ADVISORS LLC added | 423,113 | $18M | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 391,933 | $16M | 0.2% | 2026-Q1 |
| Oakum Bay Capital LLC added | 376,532 | $16M | 0.2% | 2026-Q1 |
| Selkirk Management LLC | 365,800 | $15M | 0.2% | 2026-Q1 |
| Coronation Fund Managers Ltd. added | 349,503 | $14M | 0.2% | 2026-Q1 |
| HILLMAN CO | 348,301 | $14M | 0.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 335,063 | $14M | 0.2% | 2026-Q1 |
| Woodson Capital Management, LP trimmed | 335,000 | $14M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 331,510 | $14M | 0.2% | 2026-Q1 |
| NORGES BANK trimmed | 194,928 | $13M | 0.2% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 320,779 | $13M | 0.2% | 2026-Q1 |
| Caisse de depot et placement du Quebec trimmed | 318,462 | $13M | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 280,410 | $12M | 0.2% | 2026-Q1 |
| Private Advisory Group LLC added | 277,522 | $11M | 0.2% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 271,543 | $11M | 0.2% | 2026-Q1 |
| Amova Asset Management Americas, Inc. trimmed | 271,278 | $11M | 0.2% | 2026-Q1 |
| Garde Capital, Inc. trimmed | 261,824 | $11M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 248,884 | $10M | 0.2% | 2026-Q1 |
| Invesco Ltd. trimmed | 235,787 | $10M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 231,953 | $10M | 0.1% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 220,763 | $9M | 0.1% | 2026-Q1 |
| Virtu Financial LLC added | 218,171 | $9M | 0.1% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 214,845 | $9M | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 213,144 | $9M | 0.1% | 2026-Q1 |
| HB Wealth Management, LLC added | 202,800 | $8M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 22,205,422 | $1.5B | 23.0% | 2025-Q4 stale |
| Contour Asset Management LLC added | 3,260,474 | $222M | 3.4% | 2025-Q4 stale |
| M&T Bank Corp added | 2,679,727 | $197M | 3.0% | 2025-Q4 stale |
| Altimeter Capital Management, LP | 2,187,421 | $149M | 2.3% | 2025-Q4 stale |
| SOMA EQUITY PARTNERS LP added | 1,788,044 | $122M | 1.9% | 2025-Q4 stale |
| MAVERICK CAPITAL LTD added | 1,031,622 | $79M | 1.2% | 2025-Q3 stale |
| Polar Capital Holdings Plc added | 722,617 | $50M | 0.8% | 2025-Q1 stale |
| SCOPUS ASSET MANAGEMENT, L.P. added | 546,900 | $42M | 0.6% | 2025-Q3 stale |
| Davidson Kempner Capital Management LP added | 601,600 | $41M | 0.6% | 2025-Q4 stale |
| MANE GLOBAL CAPITAL MANAGEMENT LP trimmed | 568,299 | $39M | 0.6% | 2025-Q4 stale |
| TB Alternative Assets Ltd. trimmed | 366,272 | $25M | 0.4% | 2025-Q4 stale |
| OFI INVEST ASSET MANAGEMENT new | 382,256 | $22M | 0.3% | 2025-Q4 stale |
| NAN FUNG TRINITY (HK) LTD added | 312,340 | $21M | 0.3% | 2025-Q4 stale |
| AGF MANAGEMENT LTD added | 264,633 | $20M | 0.3% | 2025-Q3 stale |
| NATIXIS added | 298,876 | $20M | 0.3% | 2025-Q4 stale |
| Nishkama Capital, LLC added | 266,218 | $18M | 0.3% | 2025-Q4 stale |
| Stony Point Capital LLC new | 241,489 | $18M | 0.3% | 2025-Q3 stale |
| California Public Employees Retirement System added | 231,304 | $16M | 0.2% | 2025-Q4 stale |
| Bridgewater Associates, LP trimmed | 222,819 | $15M | 0.2% | 2025-Q4 stale |
| CAPITAL FUND MANAGEMENT S.A. added | 214,397 | $15M | 0.2% | 2025-Q2 stale |
| Duquesne Family Office LLC added | 192,640 | $13M | 0.2% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. added | 180,729 | $13M | 0.2% | 2025-Q2 stale |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 162,900 | $13M | 0.2% | 2025-Q3 stale |
| Sone Capital Management, LLC added | 138,800 | $10M | 0.2% | 2025-Q3 stale |
| OGBORNE CAPITAL MANAGEMENT, LLC added | 150,000 | $10M | 0.2% | 2025-Q2 stale |
| Portolan Capital Management, LLC new | 150,068 | $10M | 0.2% | 2025-Q4 stale |
| Barrier Capital Management, LLC added | 137,500 | $10M | 0.2% | 2025-Q3 stale |
| AustralianSuper Pty Ltd trimmed | 140,994 | $10M | 0.2% | 2025-Q2 stale |
| Atreides Management, LP trimmed | 118,098 | $9M | 0.1% | 2025-Q3 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.