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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
AWA
326
Argos Wealth Advisors
California
$254K +$239K +1,399 New
KAM
327
Knightsbridge Asset Management
California
$252K +$237K +1,391 New
OAC
328
OMERS Administration Corp
Ontario, Canada
$252K – – –
SAI
329
Savvy Advisors Inc
New York
$252K +$18.9K +111 +9%
NWM
330
Northwest Wealth Management
Iowa
$245K +$230K +1,350 New
CGH
331
Crossmark Global Holdings
Texas
$245K +$2.05K +12 +0.9%
QFW
332
QTR Family Wealth
Florida
$243K +$234K +1,372 New
GP
333
Guardian Partners
Canada
$243K +$34.1K +200 +15%
KCM
334
Kornitzer Capital Management
Kansas
$238K -$1.12M -6,560 -83%
EF
335
Empirical Finance
Pennsylvania
$238K -$7.34K -43 -3%
NDSIB
336
North Dakota State Investment Board
North Dakota
$235K +$222K +1,298 New
VT
337
Vise Technologies
New York
$232K +$219K +1,282 New
RPCONE
338
Retirement Planning Company of New England
Rhode Island
$232K -$17.1K -100 -7%
ACM
339
Aster Capital Management
United Arab Emirates
$230K +$49.7K +291 +30%
LFA
340
Legacy Financial Advisors
Kentucky
$228K +$215K +1,257 New
EF
341
Empowered Funds
Pennsylvania
$228K -$4.44K -26 -2%
EFS
342
Essex Financial Services
Connecticut
$226K +$213K +1,247 New
SCM
343
Shelton Capital Management
Colorado
$225K +$212K +1,244 New
Twin Tree Management
344
Twin Tree Management
Texas
$222K +$209K +1,227 New
PAG
345
Poinciana Advisors Group
Florida
$219K +$206K +1,206 New
FFA
346
Farther Finance Advisors
California
$218K +$175K +1,028 +587%
CCI
347
Credit Capital Investments
New Jersey
$218K – – –
SRC
348
Sage Rhino Capital
California
$216K -$73.6K -431 -27%
KBC Group
349
KBC Group
Belgium
$216K +$42.8K +251 +27%
WCP
350
Wick Capital Partners
Pennsylvania
$212K +$200K +1,170 New
12 13
14
15 16

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.