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MongoDB
MDB

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.

New
Increased
Maintained
Reduced
Closed

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)

Holders
866
Holders Change
+51
Holders Change %
+6.26%
% of All Funds
10.46%
Holding in Top 10
4
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-33.33%
% of All Funds
0.05%
New
166
Increased
325
Reduced
275
Closed
107
Calls
$3.08B
Puts
$1.98B
Net Calls
+$1.1B
Net Calls Change
+$733M

Top Buyers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
+$440M
2
BlackRock
BlackRock
New York
+$185M
3
Fidelity International
Fidelity International
Bermuda
+$178M
4
DZ Bank
DZ Bank
Germany
+$168M
5
VOYA Investment Management
VOYA Investment Management
Georgia
+$157M

Top Sellers

Rank Fund Capital Flow
1
VH
ValueAct Holdings
California
-$262M
2
Artisan Partners
Artisan Partners
Wisconsin
-$250M
3
JCAM
Jericho Capital Asset Management
New York
-$244M
4
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
-$170M
5
Citadel Advisors
Citadel Advisors
Florida
-$127M
Name Holding Trade Value Shares
Change 		Change in
Stake
QC
876
Quadrature Capital
United Kingdom
– -$11.6M -47,226 Closed
TI
877
Trexquant Investment
Connecticut
– -$6.82M -27,880 Closed
CS
878
Clear Street
New York
– -$6.29M -25,695 Closed
ACM
879
Arthedge Capital Management
New York
– -$6.27M -25,600 Closed
QIM
880
Quantitative Investment Management
Virginia
– -$5.72M -23,384 Closed
EAM
881
Exane Asset Management
France
– -$6.21M -22,041 Closed
GCM
882
Glynn Capital Management
California
– -$5.38M -21,964 Closed
OCM
883
Octahedron Capital Management
California
– -$4.48M -18,300 Closed
XT
884
XTX Topco
Cayman Islands
– -$4.48M -18,288 Closed
SAM
885
Sunstone Asset Management
New York
– -$4.8M -15,996 Closed
HP
886
Havemeyer Place
Connecticut
– -$3.23M -13,198 Closed
CC
887
Centiva Capital
New York
– -$3.23M -13,191 Closed
HSA
888
Hussman Strategic Advisors
Maryland
– -$2.57M -10,500 Closed
FC
889
FORA Capital
Florida
– -$2.57M -10,487 Closed
NICM
890
Neo Ivy Capital Management
New York
– -$2.49M -10,154 Closed
OHIS
891
Oak Harvest Investment Services
Texas
– -$2.38M -9,708 Closed
CCIA
892
Campbell & Co Investment Adviser
Maryland
– -$2.17M -8,874 Closed
WG
893
Winton Group
United Kingdom
– -$1.81M -7,410 Closed
CCMT
894
CMT Capital Markets Trading
Germany
– -$2.08M -6,920 Closed
LCM
895
Landscape Capital Management
New Jersey
– -$1.67M -6,826 Closed
IA
896
Inspire Advisors
Idaho
– -$1.59M -6,507 Closed
PP
897
PDT Partners
New York
– -$1.59M -6,500 Closed
WF
898
WoodTrust Financial
Wisconsin
– -$1.51M -6,150 Closed
BG
899
BDF Gestion
France
– -$1.48M -6,047 Closed
LAM
900
LECAP Asset Management
United Kingdom
– -$1.46M -5,950 Closed
34 35
36
37 38

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.