868 institutional investment managers reported MDB positions in their Form 13F filings for Q2 2026, holding 74,547,091 shares worth $25.0B in total. BlackRock, Inc. reported the largest position.

Are funds buying or selling MDB?

In Q2 2026, 158 managers opened new MDB positions, 319 added, 266 trimmed and 108 sold out. Managers that filed in both quarters added a net 3,247,116 shares.

How current is this MDB institutional ownership data?

It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Funds · MDB

Who owns MDB?

Institutional ownership of MongoDB Inc. from Form 13F, Q2 2026

868 institutional managers reported holding MongoDB Inc. (MDB) in Form 13F filings for Q2 2026, with 74,547,091 shares worth $25.0B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 3,247,116 shares (+4.6%). 158 opened new positions and 108 sold out.

Funds holding: 868
Value held: $25.0B
New / sold out: 158 / 108
Net shares, same filers: +4.6%

Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Largest holders of MDB

Fund	Value	Share of 13F holdings	Shares	Move
BlackRock, Inc.	$2.1B	8.5%	6,342,387	Added
Vanguard Portfolio Management LLC	$1.5B	6.0%	4,478,068	Trimmed
FMR LLC	$1.2B	4.9%	3,660,780	Added
Vanguard Capital Management LLC	$1.2B	4.7%	3,500,977	Trimmed
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	$845M	3.4%	2,514,942	Added
Price T Rowe Associates Inc	$697M	2.8%	2,074,569	Trimmed
State Street Corp	$650M	2.6%	1,934,054	Added
Geode Capital Management, LLC	$521M	2.1%	1,554,896	Added
AQR Capital Management LLC	$505M	2.0%	1,503,774	Added
Norges Bank	$472M	1.9%	1,404,430	New
Massachusetts Financial Services Co	$427M	1.7%	1,263,690	Added
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	$392M	1.6%	1,167,644	Added
FIL Ltd	$355M	1.4%	1,057,918	Added
Invesco Ltd.	$346M	1.4%	1,031,417	Added
Morgan Stanley	$342M	1.4%	1,017,661	Trimmed
Capital World Investors	$342M	1.4%	1,017,247	Unchanged
Voya Investment Management LLC	$293M	1.2%	873,254	Added
Primecap Management Co	$284M	1.1%	846,004	Added
Harel Insurance Investments & Financial Services Ltd.	$248M	1.0%	739,460	Added
SRS Investment Management, LLC	$248M	1.0%	738,611	Added
D. E. Shaw & Co., Inc.	$239M	1.0%	710,220	Trimmed
JPMorgan Chase & Co	$235M	0.9%	694,003	Trimmed
Polar Capital Holdings Plc	$231M	0.9%	689,071	Added
Nuveen, LLC	$224M	0.9%	667,168	Added
T. Rowe Price Investment Management, Inc.	$202M	0.8%	599,967	Trimmed

Share of 13F holdings is each fund's shares as a share of the 74,547,091 MDB shares all 13F filers reported, not of shares outstanding.

Biggest buyers in Q2 2026

FMR LLC Added+$493M
Norges Bank New+$472M
BlackRock, Inc. Added+$207M
FIL Ltd Added+$199M
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main Added+$189M
Voya Investment Management LLC Added+$176M
Kinetic Partners Management, LP Added+$128M
Massachusetts Financial Services Co Added+$126M
Nuveen, LLC Added+$122M
Polar Capital Holdings Plc Added+$120M

Biggest sellers in Q2 2026

ValueAct Holdings, L.P. Trimmed-$293M
Artisan Partners Limited Partnership Trimmed-$280M
Jericho Capital Asset Management L.P. Sold out-$244M
Arrowstreet Capital, Limited Partnership Trimmed-$191M
Citadel Advisors LLC Trimmed-$142M
Point72 Asset Management, L.P. Trimmed-$141M
Federated Hermes, Inc. Trimmed-$130M
JPMorgan Chase & Co Trimmed-$115M
Wellington Management Group LLP Trimmed-$114M
Robeco Institutional Asset Management B.V. Trimmed-$110M

The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $4.8B and sold $3.5B; 319 added and 266 trimmed.

Questions about MDB ownership

Who owns MDB stock?: 868 institutional investment managers reported MDB positions in their Form 13F filings for Q2 2026, holding 74,547,091 shares worth $25.0B in total. BlackRock, Inc. reported the largest position.
Are funds buying or selling MDB?: In Q2 2026, 158 managers opened new MDB positions, 319 added, 266 trimmed and 108 sold out. Managers that filed in both quarters added a net 3,247,116 shares.
How current is this MDB institutional ownership data?: It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to MDB by CUSIP. Options are left out. MDB news and filings · MDB insider trades · Top funds