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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
MCM
451
Manchester Capital Management
Vermont
$1.63K – – –
SC
452
SouthState Corp
Florida
$1.63K +$1.36K +8 +800%
FC
453
Financial Consulate
Maryland
$1.63K +$1.54K +9 New
MAM
454
Marquette Asset Management
Minnesota
$1.63K +$1.54K +9 New
BWA
455
Basecamp Wealth Advisors
Washington
$1.63K +$1.54K +9 New
CIA
456
Cape Investment Advisory
Georgia
$1.45K – – –
CTC
457
Central Trust Company
Missouri
$1.27K – – –
OP
458
ORG Partners
Indiana
$1.27K +$1.2K +7 New
ZBNA
459
Zions Bancorporation, National Association
Utah
$1.09K -$1.02K -6 -50%
RF
460
Rossby Financial
Florida
$1.09K -$171 -1 -14%
SWM
461
Spire Wealth Management
Virginia
$1.09K – – –
CH
462
Cromwell Holdings
Wyoming
$1.09K +$341 +2 +50%
AW
463
Ankerstar Wealth
Texas
$1.09K +$1.02K +6 New
JWA
464
JFS Wealth Advisors
Pennsylvania
$1.09K +$1.02K +6 New
OC
465
Optima Capital
Oregon
$1.09K +$1.02K +6 New
PWA
466
Physician Wealth Advisors
Utah
$1.09K +$1.02K +6 New
AW
467
Avion Wealth
Texas
$1K +$683 +4 +200%
S
468
Sachetta
Massachusetts
$544 – – –
WWA
469
Wealth Watch Advisors
Colorado
$544 – – –
BIA
470
Bell Investment Advisors
California
$544 +$512 +3 New
CFB
471
Cullen/Frost Bankers
Texas
$544 +$512 +3 New
GWM
472
Gilpin Wealth Management
Colorado
$544 +$512 +3 New
CPG
473
Cornerstone Planning Group
New Jersey
$506 -$341 -2 -40%
DF
474
Dunhill Financial
United Kingdom
$395 +$171 +1 +100%
DPW
475
DiNuzzo Private Wealth
Pennsylvania
$363 -$512 -3 -60%
17 18
19
20 21

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.