Who owns MongoDB (MDB)
Which tracked institutional funds hold MDB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MDB company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 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
395 tracked funds added or opened MDB while 151 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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
MDB’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 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes MDB more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MDB 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 2026-Q1 and 2026-Q2, across 821 tracked filers holding MDB, 469 increased or opened the position and 415 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 MDB between the 2026-Q1 and 2026-Q2 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 76
- Artemis Investment Management LLP$107M
- Alyeska Investment Group, L.P.$103M
- SOMA EQUITY PARTNERS LP$53M
- LMR Partners LLP$45M
- Migdal Insurance & Financial Holdings Ltd.$40M
- Ardmore Road Asset Management LP$38M
Full exits 91
- Jericho Capital Asset Management L.P.$244M
- T. Rowe Price Investment Management, Inc.$163M
- Harel Insurance Investments & Financial Services Ltd.$135M
- Amundi$92M
- ACADIAN ASSET MANAGEMENT LLC$51M
- KBC Group NV$41M
Largest adds
- BlackRock, Inc.$1.3B
- FMR LLC$694M
- VANGUARD PORTFOLIO MANAGEMENT LLC$402M
- DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main$367M
- NORGES BANK$341M
- VANGUARD CAPITAL MANAGEMENT LLC$315M
Largest trims
- ValueAct Holdings, L.P.$198M
- Artisan Partners Limited Partnership$168M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$129M
- Point72 Asset Management, L.P.$97M
- CITADEL ADVISORS LLC$90M
- FEDERATED HERMES, INC.$82M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 6,342,387 | $2.1B | 10.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 4,478,068 | $1.5B | 7.1% | 2026-Q2 |
| FMR LLC added | 3,660,780 | $1.2B | 5.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 3,500,977 | $1.2B | 5.6% | 2026-Q2 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 2,514,942 | $845M | 4.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 2,074,569 | $697M | 3.3% | 2026-Q2 |
| STATE STREET CORP added | 1,934,054 | $650M | 3.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,554,896 | $521M | 2.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,503,774 | $505M | 2.4% | 2026-Q2 |
| NORGES BANK added | 1,404,430 | $472M | 2.2% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 1,263,690 | $427M | 2.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 1,167,644 | $392M | 1.9% | 2026-Q2 |
| FIL Ltd added | 1,057,918 | $355M | 1.7% | 2026-Q2 |
| Invesco Ltd. added | 1,031,417 | $346M | 1.6% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,017,661 | $342M | 1.6% | 2026-Q2 |
| Capital World Investors added | 1,017,247 | $342M | 1.6% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 873,254 | $293M | 1.4% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ added | 846,004 | $284M | 1.3% | 2026-Q2 |
| SRS Investment Management, LLC added | 738,611 | $248M | 1.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 710,220 | $239M | 1.1% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 694,003 | $235M | 1.1% | 2026-Q2 |
| Polar Capital Holdings Plc added | 689,071 | $231M | 1.1% | 2026-Q2 |
| Nuveen, LLC added | 667,168 | $224M | 1.1% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 583,543 | $196M | 0.9% | 2026-Q2 |
| Swedbank AB added | 580,856 | $195M | 0.9% | 2026-Q2 |
| Legal & General Group Plc added | 575,501 | $193M | 0.9% | 2026-Q2 |
| Employees Provident Fund Board trimmed | 565,940 | $190M | 0.9% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 565,569 | $190M | 0.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 544,330 | $183M | 0.9% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 525,212 | $176M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 514,868 | $173M | 0.8% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO added | 511,227 | $172M | 0.8% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 500,548 | $168M | 0.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 495,634 | $166M | 0.8% | 2026-Q2 |
| UBS Group AG added | 486,065 | $163M | 0.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 474,239 | $159M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 458,030 | $154M | 0.7% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 457,555 | $154M | 0.7% | 2026-Q2 |
| Kinetic Partners Management, LP added | 417,606 | $140M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 399,032 | $134M | 0.6% | 2026-Q2 |
| Artisan Partners Limited Partnership trimmed | 394,179 | $132M | 0.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 385,966 | $130M | 0.6% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 357,840 | $120M | 0.6% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 343,305 | $115M | 0.5% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 334,098 | $112M | 0.5% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 323,637 | $109M | 0.5% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 322,330 | $108M | 0.5% | 2026-Q2 |
| Artemis Investment Management LLP new | 318,517 | $107M | 0.5% | 2026-Q2 |
| Eurizon Capital SGR S.p.A. added | 317,898 | $107M | 0.5% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 314,750 | $106M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 312,208 | $105M | 0.5% | 2026-Q2 |
| Alyeska Investment Group, L.P. added | 307,588 | $103M | 0.5% | 2026-Q2 |
| TREMBLANT CAPITAL GROUP added | 303,538 | $102M | 0.5% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 301,234 | $101M | 0.5% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 297,159 | $73M | 0.3% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 296,109 | $99M | 0.5% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 282,873 | $102M | 0.5% | 2026-Q2 |
| Candriam S.C.A. added | 280,581 | $94M | 0.4% | 2026-Q2 |
| 1832 Asset Management L.P. trimmed | 269,300 | $90M | 0.4% | 2026-Q2 |
| BAILLIE GIFFORD & CO | 267,331 | $90M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 266,311 | $89M | 0.4% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT CO LTD added | 265,909 | $89M | 0.4% | 2026-Q2 |
| Danica Pension, Livsforsikringsaktieselskab added | 251,480 | $84M | 0.4% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 235,753 | $79M | 0.4% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC trimmed | 232,714 | $78M | 0.4% | 2026-Q2 |
| Whale Rock Capital Management LLC | 224,648 | $75M | 0.4% | 2026-Q2 |
| Quantinno Capital Management LP added | 224,351 | $75M | 0.4% | 2026-Q2 |
| Spyglass Capital Management LLC trimmed | 223,226 | $75M | 0.4% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 222,323 | $70M | 0.3% | 2026-Q2 |
| Swiss National Bank trimmed | 221,000 | $74M | 0.4% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL trimmed | 208,408 | $70M | 0.3% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB added | 205,591 | $69M | 0.3% | 2026-Q2 |
| OFI INVEST ASSET MANAGEMENT trimmed | 203,400 | $60M | 0.3% | 2026-Q2 |
| Ensign Peak Advisors, Inc trimmed | 196,687 | $66M | 0.3% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 191,492 | $64M | 0.3% | 2026-Q2 |
| Defiance ETFs, LLC added | 191,275 | $69M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 179,326 | $60M | 0.3% | 2026-Q2 |
| ValueAct Holdings, L.P. trimmed | 165,700 | $56M | 0.3% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 165,640 | $56M | 0.3% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 163,757 | $55M | 0.3% | 2026-Q2 |
| Fiera Capital Corp trimmed | 160,672 | $54M | 0.3% | 2026-Q2 |
| SOMA EQUITY PARTNERS LP new | 158,960 | $53M | 0.3% | 2026-Q2 |
| National Pension Service added | 153,687 | $52M | 0.2% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 149,320 | $50M | 0.2% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP trimmed | 149,255 | $50M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 148,635 | $50M | 0.2% | 2026-Q2 |
| Capital Impact Advisors, LLC added | 147,928 | $50M | 0.2% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 147,612 | $50M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 143,061 | $48M | 0.2% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. trimmed | 141,992 | $48M | 0.2% | 2026-Q2 |
| OSSIAM trimmed | 140,561 | $47M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 137,689 | $46M | 0.2% | 2026-Q2 |
| LMR Partners LLP trimmed | 135,304 | $45M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 134,204 | $45M | 0.2% | 2026-Q2 |
| CITIGROUP INC trimmed | 134,122 | $45M | 0.2% | 2026-Q2 |
| ExodusPoint Capital Management, LP added | 130,972 | $44M | 0.2% | 2026-Q2 |
| MIROVA added | 128,865 | $43M | 0.2% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 128,080 | $43M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 127,100 | $43M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 125,335 | $42M | 0.2% | 2026-Q2 |
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.