Who owns BZUN
Which tracked institutional funds hold BZUN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BZUN 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
6 tracked funds added or opened BZUN while 7 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
BZUN’s largest tracked holder by dollar value, SCHRODER INVESTMENT MANAGEMENT GROUP, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BZUN 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 68 tracked filers holding BZUN, 27 increased or opened the position and 28 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 BZUN 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 1
- First Beijing Investment Ltd$1M
Full exits 1
- TWO SIGMA ADVISERS, LP$2M
Largest adds
- TWO SIGMA INVESTMENTS, LP$2M
- MARSHALL WACE, LLP$360K
- JANE STREET GROUP, LLC$307K
- D. E. Shaw & Co., Inc.$280K
- SIMPLEX TRADING, LLC$255K
Largest trims
- NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$20M
- SCHRODER INVESTMENT MANAGEMENT GROUP$652K
- ACADIAN ASSET MANAGEMENT LLC$573K
- GSA CAPITAL PARTNERS LLP$312K
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$295K
- MORGAN STANLEY$274K
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 |
|---|---|---|---|---|
| SCHRODER INVESTMENT MANAGEMENT GROUP | 2,414,558 | $6M | 18.6% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 2,116,457 | $5M | 16.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 963,515 | $2M | 7.4% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 593,669 | $1M | 4.6% | 2026-Q1 |
| MARSHALL WACE, LLP added | 536,626 | $1M | 4.1% | 2026-Q1 |
| MORGAN STANLEY trimmed | 534,010 | $1M | 4.1% | 2026-Q1 |
| First Beijing Investment Ltd new | 444,328 | $1M | 3.4% | 2026-Q1 |
| AIA Group Ltd | 399,018 | $954K | 3.1% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 378,772 | $905K | 2.9% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 269,491 | $644K | 2.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 217,953 | $521K | 1.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 196,016 | $468K | 1.5% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 195,596 | $467K | 1.5% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 188,852 | $451K | 1.5% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 185,082 | $433K | 1.4% | 2026-Q1 |
| UBS Group AG trimmed | 155,091 | $371K | 1.2% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP trimmed | 131,745 | $315K | 1.0% | 2026-Q1 |
| Marex Group plc trimmed | 119,224 | $285K | 0.9% | 2026-Q1 |
| XTX Topco Ltd added | 112,535 | $269K | 0.9% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 111,944 | $268K | 0.9% | 2026-Q1 |
| SIMPLEX TRADING, LLC added | 110,879 | $265K | 0.9% | 2026-Q1 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 92,523 | $221K | 0.7% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 82,031 | $196K | 0.6% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 74,500 | $178K | 0.6% | 2026-Q1 |
| Polunin Capital Partners Ltd | 60,222 | $153K | 0.5% | 2026-Q1 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | 50,000 | $120K | 0.4% | 2026-Q1 |
| Virtu Financial LLC added | 45,904 | $110K | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 45,499 | $109K | 0.4% | 2026-Q1 |
| Jump Financial, LLC trimmed | 45,260 | $108K | 0.3% | 2026-Q1 |
| Quadrature Capital Ltd added | 42,937 | $103K | 0.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 41,876 | $100K | 0.3% | 2026-Q1 |
| STATE STREET CORP trimmed | 40,395 | $97K | 0.3% | 2026-Q1 |
| Cetera Investment Advisers added | 38,238 | $91K | 0.3% | 2026-Q1 |
| Headlands Technologies LLC added | 36,323 | $87K | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 32,668 | $78K | 0.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC | 32,067 | $77K | 0.2% | 2026-Q1 |
| Centiva Capital, LP trimmed | 31,640 | $76K | 0.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 28,322 | $68K | 0.2% | 2026-Q1 |
| Russell Investments Group, Ltd. | 28,760 | $67K | 0.2% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 23,914 | $57K | 0.2% | 2026-Q1 |
| IMC-Chicago, LLC new | 22,717 | $54K | 0.2% | 2026-Q1 |
| RBF Capital, LLC | 20,000 | $48K | 0.2% | 2026-Q1 |
| Engineers Gate Manager LP added | 15,346 | $37K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 12,258 | $29K | 0.1% | 2026-Q1 |
| QRG CAPITAL MANAGEMENT, INC. trimmed | 10,990 | $26K | 0.1% | 2026-Q1 |
| Police & Firemen's Retirement System of New Jersey new | 10,783 | $26K | 0.1% | 2026-Q1 |
| PFG Investments, LLC | 10,200 | $24K | 0.1% | 2026-Q1 |
| EverSource Wealth Advisors, LLC trimmed | 86 | $20K | 0.1% | 2026-Q1 |
| Tower Research Capital LLC (TRC) trimmed | 3,421 | $8K | 0.0% | 2026-Q1 |
| North Star Investment Management Corp. | 2,900 | $7K | 0.0% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 1,366 | $3K | 0.0% | 2026-Q1 |
| Leonteq Securities AG | 1,008 | $2K | 0.0% | 2026-Q1 |
| BlackRock, Inc. | 827 | $2K | 0.0% | 2026-Q1 |
| N.E.W. Advisory Services LLC | 800 | $2K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN | 725 | $2K | 0.0% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ | 275 | $660 | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. added | 258 | $617 | 0.0% | 2026-Q1 |
| Federation des caisses Desjardins du Quebec | 200 | $478 | 0.0% | 2026-Q1 |
| Compagnie Lombard Odier SCmA | 200 | $478 | 0.0% | 2026-Q1 |
| TD Waterhouse Canada Inc. trimmed | 125 | $297 | 0.0% | 2026-Q1 |
| ADIRONDACK TRUST CO | 75 | $178 | 0.0% | 2026-Q1 |
| IMA Advisory Services, Inc. trimmed | 70 | $167 | 0.0% | 2026-Q1 |
| CITIGROUP INC | 61 | $146 | 0.0% | 2026-Q1 |
| SWAN Capital LLC | 47 | $112 | 0.0% | 2026-Q1 |
| Eurizon Capital SGR S.p.A. | 45 | $108 | 0.0% | 2026-Q1 |
| HARBOR INVESTMENT ADVISORY, LLC | 4 | $10 | 0.0% | 2026-Q1 |
| Caitong International Asset Management Co., Ltd trimmed | 2 | $5 | 0.0% | 2026-Q1 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO trimmed | 1 | $2 | 0.0% | 2026-Q1 |
| TWO SIGMA ADVISERS, LP trimmed | 614,522 | $2M | 5.3% | 2025-Q4 stale |
| BARCLAYS PLC | 160,000 | $573K | 1.9% | 2025-Q3 stale |
| Walleye Capital LLC trimmed | 151,151 | $402K | 1.3% | 2025-Q4 stale |
| Capitolis Liquid Global Markets LLC new | 110,000 | $300K | 1.0% | 2025-Q1 stale |
| BANK OF AMERICA CORP /DE/ trimmed | 112,830 | $300K | 1.0% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC added | 59,838 | $242K | 0.8% | 2025-Q3 stale |
| MACKENZIE FINANCIAL CORP trimmed | 25,089 | $102K | 0.3% | 2025-Q3 stale |
| NORGES BANK trimmed | 30,900 | $71K | 0.2% | 2025-Q1 stale |
| LPL Financial LLC added | 13,338 | $54K | 0.2% | 2025-Q3 stale |
| WOLVERINE TRADING, LLC trimmed | 13,330 | $37K | 0.1% | 2025-Q1 stale |
| Vestmark Advisory Solutions, Inc. new | 12,024 | $32K | 0.1% | 2025-Q4 stale |
| TWO SIGMA SECURITIES, LLC trimmed | 11,422 | $30K | 0.1% | 2025-Q4 stale |
| Walleye Trading LLC added | 1,265 | $5K | 0.0% | 2025-Q3 stale |
| RAYMOND JAMES FINANCIAL INC new | 1,705 | $4K | 0.0% | 2025-Q2 stale |
| NewEdge Advisors, LLC | 1,231 | $3K | 0.0% | 2025-Q4 stale |
| OSAIC HOLDINGS, INC. added | 950 | $3K | 0.0% | 2025-Q4 stale |
| PNC Financial Services Group, Inc. trimmed | 427 | $1K | 0.0% | 2025-Q1 stale |
| Groupe la Francaise new | 327 | $1K | 0.0% | 2025-Q3 stale |
| SIGNATUREFD, LLC | 250 | $1K | 0.0% | 2025-Q3 stale |
| CWM, LLC trimmed | 350 | $1K | 0.0% | 2025-Q4 stale |
| ROYAL BANK OF CANADA trimmed | 192 | $1K | 0.0% | 2025-Q4 stale |
| Blue Trust, Inc. | 90 | $365 | 0.0% | 2025-Q3 stale |
| Main Street Group, LTD | 78 | $317 | 0.0% | 2025-Q3 stale |
| Rockefeller Capital Management L.P. | 50 | $133 | 0.0% | 2025-Q4 stale |
| Mascoma Wealth Management LLC | 30 | $122 | 0.0% | 2025-Q3 stale |
| PRINCIPAL SECURITIES, INC. | 44 | $120 | 0.0% | 2025-Q1 stale |
| TOTAL INVESTMENT MANAGEMENT INC new | 32 | $80 | 0.0% | 2025-Q2 stale |
| JONES FINANCIAL COMPANIES LLLP | 14 | $57 | 0.0% | 2025-Q3 stale |
| IFP Advisors, Inc | 1 | $4 | 0.0% | 2025-Q3 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 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.