MKTX icon

MarketAxess Holdings
MKTX

Overview Fund Activity

522 hedge funds and large institutions have $8.24B invested in MarketAxess Holdings in 2025 Q2 according to their latest regulatory filings, with 85 funds opening new positions, 227 increasing their positions, 157 reducing their positions, and 57 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
522
Holders Change
+19
Holders Change %
+3.78%
% of All Funds
7%
Holding in Top 10
3
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-25%
% of All Funds
0.04%
New
85
Increased
227
Reduced
157
Closed
57
Calls
$65.9M
Puts
$8.94M
Net Calls
+$56.9M
Net Calls Change
+$35.4M

Top Buyers

1
AQR Capital Management
AQR Capital Management
Connecticut
+$139M
2
American Century Companies
American Century Companies
Missouri
+$59.2M
3
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$36M
4
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
+$35M
5
Fidelity Investments
Fidelity Investments
Massachusetts
+$31.8M

Top Sellers

1
WA
Wasatch Advisors
Utah
-$146M
2
Macquarie Group
Macquarie Group
Australia
-$137M
3
Marshall Wace
Marshall Wace
United Kingdom
-$77.5M
4
Millennium Management
Millennium Management
New York
-$41.7M
5
VanEck Associates
VanEck Associates
New York
-$39.4M
Name Holding Trade Value Shares
Change 		Shares
Change %
AssetMark Inc
301
AssetMark Inc
California
$453K +$193K +863 +74%
RWB
302
RMR Wealth Builders
New Jersey
$452K +$15.2K +68 +3%
Asset Management One
303
Asset Management One
Japan
$452K +$91.3K +409 +25%
LSERS
304
Louisiana State Employees Retirement System
Louisiana
$447K – – –
Pathstone Holdings
305
Pathstone Holdings
New Jersey
$445K +$50.5K +226 +13%
GI
306
GAMMA Investing
California
$443K +$254K +1,137 +134%
KIA
307
Knollwood Investment Advisory
Maryland
$442K – – –
BC
308
Bayforest Capital
United Kingdom
$440K -$311K -1,392 -41%
HighTower Advisors
309
HighTower Advisors
Illinois
$437K -$126K -566 -22%
TCM
310
Teza Capital Management
Illinois
$437K +$155K +692 +55%
AMI
311
Amica Mutual Insurance
Rhode Island
$436K – – –
SAM
312
Securian Asset Management
Minnesota
$432K – – –
OF
313
Optimize Financial
California
$424K -$2.68K -12 -0.6%
XT
314
XTX Topco
Cayman Islands
$419K -$1.71M -7,654 -80%
XSC
315
X-Square Capital
Puerto Rico
$419K +$29.7K +133 +8%
HKAM
316
Horizon Kinetics Asset Management
New York
$419K +$84.9K +380 +25%
AC
317
AXQ Capital
New Jersey
$408K +$175K +783 +75%
SCP
318
Sivia Capital Partners
California
$406K +$406K +1,818 New
IG
319
ING Group
Netherlands
$405K +$27.5K +123 +7%
GC
320
Guggenheim Capital
Illinois
$405K +$5.81K +26 +1%
NMERB
321
New Mexico Educational Retirement Board
New Mexico
$391K – – –
MML Investors Services
322
MML Investors Services
Massachusetts
$388K -$433K -1,938 -53%
RS
323
R Squared
Hong Kong
$388K +$388K +1,737 New
HWM
324
HB Wealth Management
Georgia
$388K +$78.4K +351 +25%
BC
325
Bridgefront Capital
Texas
$386K +$386K +1,727 New
11 12
13
14 15