Marketaxess Holdings Inc: which funds bought and sold

Institutions that bought and sold Marketaxess shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 182 institutions that filed 13F reports for both quarters added to or opened positions in Marketaxess, and 271 cut or closed them. Together they added a net 591K shares, +1.6% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 670K shares (+4.4%); index fund managers were net sellers of 89K shares (−0.8%). 52 opened a new position and 103 sold out entirely.

Bought, Q2 2026 182 institutions, 52 of them new holders Sold, Q2 2026 271 institutions, 103 of them sold out

Net change, all compared +591K shares (+1.6%)

Net change, active managers +670K shares (+4.4%), 32 bought, 32 sold

Buyers versus sellers

institutions compared, 491

182 bought 38 271 sold

Active managers and hedge funds 32 bought · 32 sold · +670K

Index fund managers 4 bought · 6 sold · −89K

Other institutions 146 bought · 233 sold · +10K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
North Reef Capital Management LP Hedge fund	+1.5M +81.1%	3.4M	$385M
Goldman Sachs Group Inc	+522K +102.6%	1.0M	$117M
Azora Capital LP Hedge fund	+513K New position	513K	$58.2M
Citadel Advisors LLC Hedge fund	+400K +486.3%	482K	$54.7M
Davis Asset Management, L.P.	+391K +359.4%	500K	$56.7M
Los Angeles Capital Management LLC Active manager	+382K +3992.1%	392K	$44.5M
Neuberger Berman Group LLC Active manager	+264K +27.3%	1.2M	$140M
Freestone Grove Partners LP Hedge fund	+173K New position	173K	$19.6M
Primecap Management Co Active manager	+158K +4.7%	3.5M	$398M
Tudor Investment Corp Et Al Hedge fund	+138K New position	138K	$15.6M
Geode Capital Management, LLC Index funds	+132K +15.3%	995K	$113M
M&G PLC	+121K New position	121K	$13.7M
CIBC Bancorp Usa Inc.	+112K +3373.4%	115K	$13M
First Eagle Investment Management, LLC Active manager	+99K +450600.0%	99K	$11.3M
Algert Global LLC Hedge fund	+93K +478.2%	112K	$12.8M
Bank Of Nova Scotia	+91K +368.9%	115K	$13.1M
Invenomic Capital Management LP Hedge fund	+90K New position	90K	$10.3M
CIBC World Market Inc.	+74K +1861.1%	78K	$8.9M
HRT Financial LP	+69K +50.3%	206K	$23.4M
Jump Financial, LLC	+66K +525.7%	79K	$8.9M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
North Reef Capital Management LP Hedge fund	+1.5M +81.1%	3.4M	$385M
Azora Capital LP Hedge fund	+513K New position	513K	$58.2M
Citadel Advisors LLC Hedge fund	+400K +486.3%	482K	$54.7M
Los Angeles Capital Management LLC Active manager	+382K +3992.1%	392K	$44.5M
Neuberger Berman Group LLC Active manager	+264K +27.3%	1.2M	$140M
Freestone Grove Partners LP Hedge fund	+173K New position	173K	$19.6M
Primecap Management Co Active manager	+158K +4.7%	3.5M	$398M
Tudor Investment Corp Et Al Hedge fund	+138K New position	138K	$15.6M
First Eagle Investment Management, LLC Active manager	+99K +450600.0%	99K	$11.3M
Algert Global LLC Hedge fund	+93K +478.2%	112K	$12.8M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−978K −89.9%	110K	$12.4M
AQR Capital Management LLC Hedge fund	−696K −26.0%	2.0M	$223M
Findlay Park Partners LLP Active manager	−481K Sold out	0	—
Van Eck Associates Corp	−315K −25.4%	925K	$105M
BNP Paribas Financial Markets	−284K −88.9%	35K	$4M
Point72 Asset Management, L.P. Hedge fund	−245K −96.8%	8,100	$919,269
Driehaus Capital Management LLC Active manager	−239K Sold out	0	—
Walleye Capital LLC Hedge fund	−239K −71.7%	94K	$10.7M
Amundi	−229K −88.6%	29K	$3.3M
Arrowstreet Capital, Limited Partnership Hedge fund	−173K −58.7%	122K	$13.8M
Ieq Capital, LLC	−158K −90.7%	16K	$1.8M
FMR LLC Active manager	−114K −7.5%	1.4M	$159M
Guardcap Asset Management Ltd	−107K −16.6%	536K	$62.2M
Polar Asset Management Partners Inc.	−104K Sold out	0	—
Goodman Financial Corp	−83K Sold out	0	—
Blackrock, Inc. Index funds	−75K −1.8%	4.0M	$454M
Assenagon Asset Management S.A.	−74K −70.7%	31K	$3.5M
Champlain Investment Partners, LLC Active manager	−74K −35.2%	136K	$15.4M
Morgan Stanley	−68K −13.8%	423K	$48M
Vanguard Portfolio Management LLC Index funds	−63K −2.9%	2.1M	$238M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−978K −89.9%	110K	$12.4M
AQR Capital Management LLC Hedge fund	−696K −26.0%	2.0M	$223M
Findlay Park Partners LLP Active manager	−481K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−245K −96.8%	8,100	$919,269
Driehaus Capital Management LLC Active manager	−239K Sold out	0	—
Walleye Capital LLC Hedge fund	−239K −71.7%	94K	$10.7M
Arrowstreet Capital, Limited Partnership Hedge fund	−173K −58.7%	122K	$13.8M
FMR LLC Active manager	−114K −7.5%	1.4M	$159M
Champlain Investment Partners, LLC Active manager	−74K −35.2%	136K	$15.4M
Gotham Asset Management, LLC Hedge fund	−48K −80.5%	12K	$1.3M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Azora Capital LPHedge fund	513K	$58.2M
Freestone Grove Partners LPHedge fund	173K	$19.6M
Tudor Investment Corp Et AlHedge fund	138K	$15.6M
M&G PLC	121K	$13.7M
Invenomic Capital Management LPHedge fund	90K	$10.3M
Brevan Howard Capital Management LPHedge fund	51K	$5.8M
Marshall Wace, LLPHedge fund	39K	$4.4M
Corebridge Financial, Inc.	39K	$4.2M
Fj Capital Management LLC	37K	$4.2M
Susquehanna International Group, LLP	33K	$3.7M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Findlay Park Partners LLPActive manager	481K	$79.3M
Driehaus Capital Management LLCActive manager	239K	$39.5M
Polar Asset Management Partners Inc.	104K	$17.2M
Goodman Financial Corp	83K	$13.7M
Icici Prudential Asset Management Co Ltd	49K	$8.1M
Fideuram - Intesa Sanpaolo Private Banking S.P.A.	39K	$6.5M
Baillie Gifford & CoActive manager	29K	$4.8M
Canada Pension Plan Investment Board	23K	$3.8M
Winton Group LtdHedge fund	18K	$3M
Cinctive Capital Management LPHedge fund	18K	$2.9M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 393
Ten largest holders: 55.0%
Index fund managers: 27.6%
Active managers and hedge funds: 40.8%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	32	32	12	9	+670K	+4.4%
Index fund managers	4	6	0	0	−89K	−0.8%
Other institutions	146	233	40	94	+10K	+0.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Marketaxess.

Only managers that filed a holdings report for both quarters are compared (491 here). 14 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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