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MarketAxess Holdings
MKTX

485 hedge funds and large institutions have $6.62B invested in MarketAxess Holdings in 2025 Q4 according to their latest regulatory filings, with 117 funds opening new positions, 156 increasing their positions, 170 reducing their positions, and 70 closing their positions.

New
Increased
Maintained
Reduced
Closed

67% more first-time investments, than exits

New positions opened: 117 | Existing positions closed: 70

65% more call options, than puts

Call options by funds: $33.7M | Put options by funds: $20.4M

50% more funds holding in top 10

Funds holding in top 10: 2 → 3 (+1)

8% more funds holding

Funds holding: 450 → 485 (+35)

7% more capital invested

Capital invested by funds: $6.21B → $6.62B (+$404M)

2.96% more ownership

Funds ownership: 95.28% → 98.24% (+3%)

8% less repeat investments, than reductions

Existing positions increased: 156 | Existing positions reduced: 170

Holders
485
Holders Change
+35
Holders Change %
+7.78%
% of All Funds
5.9%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.04%
New
117
Increased
156
Reduced
170
Closed
70
Calls
$33.7M
Puts
$20.4M
Net Calls
+$13.3M
Net Calls Change
-$156M

Top Buyers

1
BlackRock
BlackRock
New York
+$324M
2
AQR Capital Management
AQR Capital Management
Connecticut
+$274M
3
Primecap Management
Primecap Management
California
+$161M
4
Bank of Montreal
Bank of Montreal
Ontario, Canada
+$159M
5
NRCM
North Reef Capital Management
California
+$119M

Top Sellers

1
HSBC Holdings
HSBC Holdings
United Kingdom
-$306M
2
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
-$214M
3
VanEck Associates
VanEck Associates
New York
-$125M
4
Millennium Management
Millennium Management
New York
-$52.2M
5
GAM
GuardCap Asset Management
United Kingdom
-$35.4M
Name Holding Trade Value Shares
Change 		Change in
Stake
WIA
526
World Investment Advisors
California
– -$212K -1,219 Closed
FDP
527
Financiere des Professionnels
Quebec, Canada
– -$201K -1,154 Closed
CI Investments Inc
528
CI Investments Inc
Ontario, Canada
– -$199K -1,142 Closed
Daiwa Securities Group
529
Daiwa Securities Group
Japan
– -$192K -1,100 Closed
MG
530
Mather Group
Illinois
– -$79.8K -458 Closed
SC
531
Stance Capital
Massachusetts
– -$42.2K -242 Closed
PPA
532
Pilgrim Partners Asia
Singapore
– -$38.3K -220 Closed
SWP
533
Strategic Wealth Partners
Ohio
– -$34.9K -200 Closed
PWA
534
Principia Wealth Advisory
Texas
– -$28.8K -166 Closed
A
535
Allianz
Germany
– -$20.2K -116 Closed
PS
536
Principal Securities
Iowa
– -$16.2K -93 Closed
Skandinaviska Enskilda Banken (SEB)
537
Skandinaviska Enskilda Banken (SEB)
Sweden
– -$10.5K -60 Closed
WANY
538
Wealthspire Advisors (New York)
New York
– -$9.93K -57 Closed
JFGIW
539
Johnson Financial Group Inc (Wisconsin)
Wisconsin
– -$8.54K -49 Closed
TPCW
540
TD Private Client Wealth
New York
– -$7.67K -44 Closed
GXJ
541
Global X Japan
Japan
– -$5.58K -32 Closed
RS
542
Rakuten Securities
Japan
– -$3.31K -19 Closed
ASN
543
Advisory Services Network
Georgia
– -$2.45K -14 Closed
SIC
544
Salem Investment Counselors
North Carolina
– -$2.44K -14 Closed
MA
545
Montag & Associates
Georgia
– -$2.09K -12 Closed
W
546
WealthCollab
Washington
– -$1.92K -11 Closed
TIM
547
Tortoise Investment Management
New York
– -$1.74K -10 Closed
BBHC
548
Brown Brothers Harriman & Co
New York
– -$1.39K -8 Closed
CA
549
CoreCap Advisors
Michigan
– -$871 -5 Closed
FLFS
550
Family Legacy Financial Solutions
North Carolina
– -$559 -3 Closed
19 20 21
22
23

MKTX Hedge Fund Activity: Q4 2025 in Review

485 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in MarketAxess Holdings (MKTX) for Q4 2025, worth a combined $6.62B — up 6.5% from $6.21B a quarter earlier.

Buyers outnumbered sellers: 117 funds opened new MKTX positions and 70 closed out — a net gain of 47 holders — while 156 added to existing stakes and 170 trimmed.

The largest buyer was BlackRock, adding an estimated $324M. The largest seller was HSBC Holdings, cutting an estimated $306M.

  • 485 institutional investors held MarketAxess Holdings (MKTX) as of Q4 2025, up from 450 in Q3 2025.
  • Funds reported $6.62B of MarketAxess Holdings stock for Q4 2025, up 6.5% quarter-over-quarter.
  • 117 funds opened new MarketAxess Holdings positions in Q4 2025 and 70 closed out, a net change of +47 holders.
  • The largest MarketAxess Holdings buyer in Q4 2025 was BlackRock, an estimated $324M added.
  • The largest MarketAxess Holdings seller in Q4 2025 was HSBC Holdings, an estimated $306M sold.

Based on aggregated 13F filings for Q4 2025.