MongoDB
874 hedge funds and large institutions have $25B invested in MongoDB in 2026 Q2 according to their latest regulatory filings, with 168 funds opening new positions, 327 increasing their positions, 278 reducing their positions, and 107 closing their positions.
57% more first-time investments, than exits
New positions opened: 168 | Existing positions closed: 107
56% more call options, than puts
Call options by funds: $3.08B | Put options by funds: $1.98B
33% more capital inflows, than outflows
Capital inflows: $4.25B | Capital outflows: $3.21B
18% more repeat investments, than reductions
Existing positions increased: 327 | Existing positions reduced: 278
7% more funds holding
Funds holding: 817 → 874 (+57)
3.77% more ownership
Funds ownership: 88.81% → 92.58% (+3.8%)
33% less funds holding in top 10
Funds holding in top 10: 6 → 4 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$440M |
| 2 |
BlackRock
New York
|
+$185M |
| 3 |
Fidelity International
Hamilton,
Bermuda
|
+$178M |
| 4 |
DZ Bank
Frankfurt Am Main,
Germany
|
+$168M |
| 5 |
VOYA Investment Management
Atlanta,
Georgia
|
+$157M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ValueAct Holdings
San Francisco,
California
|
-$262M |
| 2 |
Artisan Partners
Milwaukee,
Wisconsin
|
-$250M |
| 3 |
Jericho Capital Asset Management
New York
|
-$244M |
| 4 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$170M |
| 5 |
Citadel Advisors
Miami,
Florida
|
-$127M |
MDB Hedge Fund Activity: Q2 2026 in Review
874 of the 8,353 institutional investors tracked by Wall St. Rank reported a position in MongoDB (MDB) for Q2 2026, worth a combined $25B — up 43% from $17.5B a quarter earlier.
Buyers outnumbered sellers: 168 funds opened new MDB positions and 107 closed out — a net gain of 61 holders — while 327 added to existing stakes and 278 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $440M. The largest seller was ValueAct Holdings, cutting an estimated $262M.
- 874 institutional investors held MongoDB (MDB) as of Q2 2026, up from 817 in Q1 2026.
- Funds reported $25B of MongoDB stock for Q2 2026, up 43% quarter-over-quarter.
- 168 funds opened new MongoDB positions in Q2 2026 and 107 closed out, a net change of +61 holders.
- The largest MongoDB buyer in Q2 2026 was Fidelity Investments, an estimated $440M added.
- The largest MongoDB seller in Q2 2026 was ValueAct Holdings, an estimated $262M sold.
Based on aggregated 13F filings for Q2 2026.