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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
Truist Financial
351
Truist Financial
North Carolina
$207K -$49.1K -288 -20%
CL
352
Choreo LLC
Illinois
$207K +$194K +1,135 New
BIG
353
Brooklyn Investment Group
New York
$206K +$192K +1,123 New
SFG
354
Sather Financial Group
Texas
$205K +$193K +1,129 New
PP
355
PDS Planning
Ohio
$204K +$192K +1,128 New
Cetera Investment Advisers
356
Cetera Investment Advisers
Illinois
$204K -$27.8K -163 -13%
CL
357
CSS LLC
Illinois
$203K +$191K +1,120 New
CAM
358
Claret Asset Management
Quebec, Canada
$202K +$190K +1,116 New
Commonwealth Equity Services
359
Commonwealth Equity Services
Massachusetts
$201K +$189K +1,108 New
A
360
AlphaQuest
New York
$199K -$1.42M -8,319 -88%
CI
361
CX Institutional
Indiana
$198K +$110K +646 +145%
SO
362
STRS Ohio
Ohio
$158K +$171 +1 +0.1%
PWPS
363
Pinnacle Wealth Planning Services
Ohio
$158K +$149K +871 New
SDIC
364
South Dakota Investment Council
South Dakota
$154K -$17.1K -100 -11%
C
365
Covestor
United Kingdom
$147K +$27K +158 +24%
TWD
366
True Wealth Design
Ohio
$125K +$109K +641 +1,393%
VCM
367
Versant Capital Management
Arizona
$113K +$85.8K +503 +423%
HFS
368
Hantz Financial Services
Michigan
$112K +$49.5K +290 +89%
MIM
369
MetLife Investment Management
New Jersey
$108K -$2.05K -12 -2%
ECSS
370
Eurizon Capital SGR SpA
$106K +$99K +580 New
CIAM
371
Caitong International Asset Management
Hong Kong
$91.9K +$3.58K +21 +4%
Northwestern Mutual Wealth Management
372
Northwestern Mutual Wealth Management
Wisconsin
$89.9K -$18.9K -111 -18%
QL
373
Quarry LP
New York
$87K -$40.1K -235 -33%
Asset Management One
374
Asset Management One
Japan
$85.9K -$41.1K -241 -34%
SOW
375
State of Wyoming
Wyoming
$76.3K +$71.8K +421 New
13 14
15
16 17

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.