MongoDB
866 hedge funds and large institutions have $24.9B invested in MongoDB in 2026 Q2 according to their latest regulatory filings, with 166 funds opening new positions, 325 increasing their positions, 275 reducing their positions, and 107 closing their positions.
56% more call options, than puts
Call options by funds: $3.08B | Put options by funds: $1.98B
55% more first-time investments, than exits
New positions opened: 166 | Existing positions closed: 107
42% more capital invested
Capital invested by funds: $17.5B → $24.9B (+$7.41B)
18% more repeat investments, than reductions
Existing positions increased: 325 | Existing positions reduced: 275
6% more funds holding
Funds holding: 815 → 866 (+51)
3.57% more ownership
Funds ownership: 88.8% → 92.37% (+3.6%)
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 |
VH
ValueAct Holdings
San Francisco,
California
|
-$262M |
| 2 |
Artisan Partners
Milwaukee,
Wisconsin
|
-$250M |
| 3 |
JCAM
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
866 of the 8,279 institutional investors tracked by Wall St. Rank reported a position in MongoDB (MDB) for Q2 2026, worth a combined $24.9B — up 42% from $17.5B a quarter earlier.
Buyers outnumbered sellers: 166 funds opened new MDB positions and 107 closed out — a net gain of 59 holders — while 325 added to existing stakes and 275 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $440M. The largest seller was ValueAct Holdings, cutting an estimated $262M.
- 866 institutional investors held MongoDB (MDB) as of Q2 2026, up from 815 in Q1 2026.
- Funds reported $24.9B of MongoDB stock for Q2 2026, up 42% quarter-over-quarter.
- 166 funds opened new MongoDB positions in Q2 2026 and 107 closed out, a net change of +59 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.