MARKETAXESS HOLDINGS INC (MKTX) — Institutional Holders, Q2 2026

400 institutional investment managers reported a MKTX position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $4.4B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← MKTX stock profile

MKTX in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

130

Trimmed

171

Sold out

106

Biggest buyers

North Reef Capital ManagementAdded · +1,520,000 sh+$172.5M
GOLDMAN SACHS GROUPAdded · +522,266 sh+$59.3M
Azora CapitalNew · +513,081 sh+$58.2M
CITADEL ADVISORSAdded · +399,530 sh+$45.3M
Davis Asset Management, L.P.Added · +391,154 sh+$44.4M

Biggest sellers

MILLENNIUM MANAGEMENTTrimmed · -977,598 sh-$110.9M
AQR CAPITAL MANAGEMENTTrimmed · -696,457 sh-$79.0M
Findlay Park Partners LLPSold out · -480,600 sh-$54.5M
VAN ECK ASSOCIATESTrimmed · -314,668 sh-$35.7M
BNP PARIBAS FINANCIAL MARKETSTrimmed · -284,014 sh-$32.2M

MKTX 13F holders ranked 1–100 of 400

Institutional investors reporting a position in MARKETAXESS HOLDINGS INC on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 3,999,836 sh	3,999,836	$453.9M	<0.01%	-1.8%
2	PRIMECAP MANAGEMENT#2 · 3,504,905 sh	3,504,905	$397.8M	0.24%	+4.7%
3	North Reef Capital Management#3 · 3,395,000 sh	3,395,000	$385.3M	14.77%	+81.1%
4	VANGUARD PORTFOLIO MANAGEMENT#4 · 2,100,273 sh	2,100,273	$238.4M	0.01%	-2.9%
5	AQR CAPITAL MANAGEMENT#5 · 1,987,288 sh	1,987,288	$222.8M	0.08%	-26.0%
6	VANGUARD CAPITAL MANAGEMENT#6 · 1,546,670 sh	1,546,670	$175.5M	<0.01%	-3.9%
7	FMR#7 · 1,404,998 sh	1,404,998	$159.5M	<0.01%	-7.5%
8	STATE STREET#8 · 1,281,769 sh	1,281,769	$145.4M	<0.01%	+0.1%
9	Neuberger Berman Group#9 · 1,229,929 sh	1,229,929	$139.6M	0.09%	+27.3%
10	GOLDMAN SACHS GROUP#10 · 1,031,309 sh	1,031,309	$117.0M	0.01%	+102.6%
11	BANK OF MONTREAL#11 · 1,017,024 sh	1,017,024	$115.4M	0.04%	-0.3%
12	GEODE CAPITAL MANAGEMENT#12 · 994,772 sh	994,772	$112.9M	<0.01%	+15.3%
13	VAN ECK ASSOCIATES#13 · 924,617 sh	924,617	$104.9M	0.06%	-25.4%
14	DIMENSIONAL FUND ADVISORS#14 · 597,894 sh	597,894	$67.8M	0.01%	+2.8%
15	NORGES BANK#15 · 572,422 sh	572,422	$65.0M	<0.01%	—
16	GUARDCAP ASSET MANAGEMENT Ltd#16 · 536,324 sh	536,324	$62.2M	4.42%	-16.6%
17	TWO SIGMA INVESTMENTS#17 · 543,890 sh	543,890	$61.7M	0.04%	+3.8%
18	Azora Capital#18 · 513,081 sh	513,081	$58.2M	2.45%	New
19	Davis Asset Management, L.P.#19 · 500,000 sh	500,000	$56.7M	1.44%	+359.4%
20	CITADEL ADVISORS#20 · 481,689 sh	481,689	$54.7M	<0.01%	+486.3%
21	JPMORGAN CHASE#21 · 438,001 sh	438,001	$48.3M	<0.01%	+1.2%
22	MORGAN STANLEY#22 · 422,864 sh	422,864	$48.0M	<0.01%	-13.8%
23	LOS ANGELES CAPITAL MANAGEMENT#23 · 392,065 sh	392,065	$44.5M	0.16%	+3992.1%
24	CHARLES SCHWAB INVESTMENT MANAGEMENT#24 · 330,815 sh	330,815	$37.5M	<0.01%	-2.3%
25	BANK OF AMERICA#25 · 303,517 sh	303,517	$34.4M	<0.01%	+15.0%
26	UBS Group AG#26 · 278,745 sh	278,745	$31.6M	<0.01%	+2.4%
27	Bank of New York Mellon#27 · 257,642 sh	257,642	$29.2M	<0.01%	-11.1%
28	RDST Capital#28 · 247,112 sh	247,112	$28.0M	2.32%	-16.3%
29	NORTHERN#29 · 246,521 sh	246,521	$28.0M	<0.01%	+4.3%
30	COOKE & BIELER#30 · 238,755 sh	238,755	$27.1M	—	+5.5%
31	VANGUARD FIDUCIARY#31 · 223,656 sh	223,656	$25.4M	<0.01%	-2.5%
32	HRT FINANCIAL#32 · 205,854 sh	205,854	$23.4M	0.06%	+50.3%
33	BNP Paribas Asset Management Holding S.A.#33 · 204,309 sh	204,309	$23.2M	0.02%	+0.4%
34	VICTORY CAPITAL MANAGEMENT#34 · 202,731 sh	202,731	$23.0M	0.01%	-1.1%
35	RENAISSANCE TECHNOLOGIES#35 · 200,000 sh	200,000	$22.7M	0.03%	+19.7%
36	Connor, Clark & Lunn Investment Management Ltd.#36 · 186,658 sh	186,658	$21.2M	0.04%	+7.2%
37	PRINCIPAL FINANCIAL GROUP#37 · 173,312 sh	173,312	$19.7M	<0.01%	-4.7%
38	Freestone Grove Partners#38 · 172,799 sh	172,799	$19.6M	0.13%	New
39	PUBLIC SECTOR PENSION INVESTMENT BOARD#39 · 157,338 sh	157,338	$17.9M	0.05%	-18.2%
40	Sone Capital Management#40 · 155,522 sh	155,522	$17.7M	1.34%	-2.8%
41	Nuveen#41 · 148,468 sh	148,468	$16.8M	<0.01%	+0.3%
42	Invesco Ltd.#42 · 140,817 sh	140,817	$16.0M	<0.01%	+19.0%
43	TUDOR INVESTMENT ET AL#43 · 137,847 sh	137,847	$15.6M	0.02%	New
44	Champlain Investment Partners#44 · 136,087 sh	136,087	$15.4M	0.40%	-35.2%
45	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#45 · 122,005 sh	122,005	$13.8M	<0.01%	-58.7%
46	M&G Plc#46 · 121,309 sh	121,309	$13.7M	0.07%	New
47	BANK OF NOVA SCOTIA#47 · 115,410 sh	115,410	$13.1M	0.02%	+368.9%
48	CIBC Bancorp USA#48 · 114,968 sh	114,968	$13.0M	0.02%	+3373.4%
49	EUBEL BRADY & SUTTMAN ASSET MANAGEMENT#49 · 114,292 sh	114,292	$13.0M	1.54%	+2.5%
50	RAYMOND JAMES FINANCIAL#50 · 114,278 sh	114,278	$13.0M	<0.01%	-6.0%
51	ALGERT GLOBAL#51 · 112,400 sh	112,400	$12.8M	0.15%	+478.2%
52	MILLENNIUM MANAGEMENT#52 · 109,590 sh	109,590	$12.4M	<0.01%	-89.9%
53	HEARTLAND ADVISORS#53 · 104,926 sh	104,926	$11.9M	0.53%	+79.9%
54	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#54 · 104,853 sh	104,853	$11.9M	<0.01%	-2.1%
55	Walleye Capital#55 · 94,002 sh	94,002	$10.7M	0.04%	-71.7%
56	HEALTHCARE OF ONTARIO PENSION PLAN FUND#56 · 92,100 sh	92,100	$10.5M	0.01%	-36.8%
57	Invenomic Capital Management#57 · 90,441 sh	90,441	$10.3M	0.61%	New
58	Legal & General Group Plc#58 · 84,460 sh	84,460	$9.6M	<0.01%	-6.9%
59	AMERIPRISE FINANCIAL#59 · 79,372 sh	79,372	$9.0M	<0.01%	+13.6%
60	Jump Financial#60 · 78,566 sh	78,566	$8.9M	0.07%	+525.7%
61	CIBC WORLD MARKET#61 · 78,286 sh	78,286	$8.9M	0.01%	+1861.1%
62	JANE STREET GROUP#62 · 77,353 sh	77,353	$8.8M	<0.01%	+507.2%
63	FLOSSBACH VON STORCH SE#63 · 75,000 sh	75,000	$8.5M	0.04%	-30.6%
64	RHUMBLINE ADVISERS#64 · 72,725 sh	72,725	$8.3M	<0.01%	-19.2%
65	Swiss National Bank#65 · 71,400 sh	71,400	$8.1M	<0.01%	-3.1%
66	Trexquant Investment#66 · 66,681 sh	66,681	$7.6M	0.04%	-5.3%
67	CITIGROUP#67 · 64,762 sh	64,762	$7.3M	<0.01%	+202.8%
68	Alpha Omega Wealth Management#68 · 61,453 sh	61,453	$7.0M	—	+464.0%
69	STIFEL FINANCIAL#69 · 56,622 sh	56,622	$6.4M	<0.01%	+58.6%
70	SEI INVESTMENTS#70 · 56,022 sh	56,022	$6.4M	<0.01%	+85.3%
71	Y-Intercept (Hong Kong) Ltd#71 · 54,792 sh	54,792	$6.2M	—	+1694.1%
72	VAN DEN BERG MANAGEMENT I#72 · 52,054 sh	52,054	$5.9M	1.25%	+65.7%
73	Brevan Howard Capital Management#73 · 51,050 sh	51,050	$5.8M	0.04%	New
74	STATE OF WISCONSIN INVESTMENT BOARD#74 · 51,004 sh	51,004	$5.8M	0.01%	+43.8%
75	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM#75 · 49,950 sh	49,950	$5.7M	<0.01%	-31.1%
76	First Eagle Investment Management#76 · 49,577 sh	49,577	$5.6M	<0.01%	New
77	D. E. Shaw#77 · 47,977 sh	47,977	$5.4M	<0.01%	+1347.7%
78	Quantinno Capital Management#78 · 47,575 sh	47,575	$5.4M	<0.01%	+1.2%
79	FIRST ADVISORS#79 · 46,658 sh	46,658	$5.3M	<0.01%	+18.1%
80	WILSON ASSET MANAGEMENT (INTERNATIONAL) PTY LTD#80 · 45,042 sh	45,042	$5.1M	—	+14.1%
81	Mariner#81 · 44,790 sh	44,790	$5.1M	<0.01%	-43.4%
82	Cerity Partners#82 · 44,382 sh	44,382	$5.0M	<0.01%	-47.2%
83	AMERICAN CENTURY COMPANIES#83 · 44,363 sh	44,363	$5.0M	<0.01%	+174.0%
84	T. Rowe Price Investment Management#84 · 43,842 sh	43,842	$5.0M	<0.01%	-1.0%
85	DF DENT#85 · 39,303 sh	39,303	$4.5M	0.08%	-4.1%
86	ROYAL BANK OF CANADA#86 · 39,121 sh	39,121	$4.4M	<0.01%	+26.5%
87	MARSHALL WACE, LLP#87 · 39,090 sh	39,090	$4.4M	<0.01%	New
88	PRICE T ROWE ASSOCIATES#88 · 38,521 sh	38,521	$4.4M	<0.01%	+4.3%
89	Holocene Advisors#89 · 38,269 sh	38,269	$4.3M	<0.01%	-12.6%
90	Prana Capital Management#90 · 37,877 sh	37,877	$4.3M	0.13%	+19.9%
91	Corebridge Financial#91 · 38,650 sh	38,650	$4.2M	100.00%	New
92	FJ Capital Management#92 · 37,237 sh	37,237	$4.2M	0.55%	New
93	Taylor Hoffman Capital Management#93 · 35,895 sh	35,895	$4.1M	0.99%	+24.4%
94	BNP PARIBAS FINANCIAL MARKETS#94 · 35,288 sh	35,288	$4.0M	<0.01%	-88.9%
95	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM#95 · 34,407 sh	34,407	$3.9M	<0.01%	-1.8%
96	READYSTATE ASSET MANAGEMENT#96 · 33,794 sh	33,794	$3.8M	<0.01%	+35.5%
97	HSBC PLC#97 · 33,576 sh	33,576	$3.8M	<0.01%	+59.8%
98	VANGUARD ASSET MANAGEMENT, Ltd#98 · 33,563 sh	33,563	$3.8M	<0.01%	+0.3%
99	GW&K Investment Management#99 · 32,689 sh	32,689	$3.7M	0.03%	0.0%
100	SUSQUEHANNA INTERNATIONAL GROUP, LLP#100 · 32,579 sh	32,579	$3.7M	<0.01%	New

Funds that sold out of MKTX in Q2 2026 (106)

Held MKTX at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held MKTX in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
Findlay Park Partners LLP480,600 sh	480,600	$79.3M
DRIEHAUS CAPITAL MANAGEMENT239,256 sh	239,256	$39.5M
Polar Asset Management Partners104,174 sh	104,174	$17.2M
Goodman Financial83,163 sh	83,163	$13.7M
ICICI Prudential Asset Management Ltd49,289 sh	49,289	$8.1M
FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A.39,370 sh	39,370	$6.5M
BAILLIE GIFFORD29,032 sh	29,032	$4.8M
CANADA PENSION PLAN INVESTMENT BOARD22,800 sh	22,800	$3.8M
WINTON GROUP Ltd18,018 sh	18,018	$3.0M
Cinctive Capital Management17,582 sh	17,582	$2.9M
Pallas Capital Advisors11,133 sh	11,133	$1.8M
NATIXIS ADVISORS10,880 sh	10,880	$1.8M
LEUCADIA NATIONAL8,190 sh	8,190	$1.4M
Baird Financial Group7,753 sh	7,753	$1.3M
Weiss Asset Management7,490 sh	7,490	$1.2M
Oak Thistle7,370 sh	7,370	$1.2M
Quantbot Technologies6,940 sh	6,940	$1.1M
Dynamic Technology Lab Private Ltd6,363 sh	6,363	$1.0M
Redwood Investment Management6,262 sh	6,262	$1.0M
Alyeska Investment Group, L.P.5,042 sh	5,042	$831.8K
RMB Capital Management4,740 sh	4,740	$782.0K
Virtu Financial4,742 sh	4,742	$782.0K
NorthCrest Asset Manangement4,437 sh	4,437	$760.8K
Northwest & Ethical Investments L.P.4,036 sh	4,036	$665.9K
JACOBS LEVY EQUITY MANAGEMENT3,908 sh	3,908	$644.7K
TD ASSET MANAGEMENT3,567 sh	3,567	$588.5K
Parcion Private Wealth3,252 sh	3,252	$536.5K
Vident Advisory3,202 sh	3,202	$528.3K
Entropy Technologies3,192 sh	3,192	$526.6K
Inspire Advisors3,057 sh	3,057	$504.4K
waypoint wealth counsel2,954 sh	2,954	$487.4K
WADDELL & ASSOCIATES2,926 sh	2,926	$482.7K
JACKSON THORNTON WEALTH MANAGEMENT2,785 sh	2,785	$478.9K
Vestmark Advisory Solutions2,775 sh	2,775	$457.8K
Qsemble Capital Management2,679 sh	2,679	$442.0K
EVOKE WEALTH2,628 sh	2,628	$433.7K
FOX RUN MANAGEMENT, L.L.C.2,620 sh	2,620	$431.7K
O'SHAUGHNESSY ASSET MANAGEMENT2,574 sh	2,574	$424.7K
PEAK62,290 sh	2,290	$377.8K
Sentinus2,290 sh	2,290	$377.8K
TWO SIGMA SECURITIES2,260 sh	2,260	$372.9K
Reynders McVeigh Capital Management2,215 sh	2,215	$365.0K
AlphaGrep UK Ltd2,192 sh	2,192	$361.6K
Allegiance Financial Group Advisory Services2,113 sh	2,113	$348.6K
Pinnacle Wealth Management Advisory Group2,032 sh	2,032	$335.2K
PINNACLE ASSOCIATES LTD2,032 sh	2,032	$335.2K
NWAM1,984 sh	1,984	$327.3K
Cambridge Investment Research Advisors1,977 sh	1,977	$326.0K
EARNED WEALTH ADVISORS1,976 sh	1,976	$326.0K
SYM FINANCIAL1,874 sh	1,874	$309.2K
GSA CAPITAL PARTNERS LLP1,821 sh	1,821	$300.0K
Kera Capital Partners1,761 sh	1,761	$290.5K
Ariadne Wealth Management1,747 sh	1,747	$288.2K
GenTrust1,744 sh	1,744	$287.7K
Crossmark Global1,715 sh	1,715	$282.9K
BEESE FULMER INVESTMENT MANAGEMENT1,711 sh	1,711	$282.3K
NOMURA1,607 sh	1,607	$265.1K
Dundas Partners LLP1,604 sh	1,604	$264.6K
R Squared Ltd1,590 sh	1,590	$262.3K
Argos Wealth Advisors1,561 sh	1,561	$257.5K
Abundance Wealth Counselors1,498 sh	1,498	$247.1K
BENEDICT FINANCIAL ADVISORS1,447 sh	1,447	$238.7K
Legacy Financial Advisors1,440 sh	1,440	$237.6K
Vise Technologies1,282 sh	1,282	$232.4K
Wick Capital Partners1,404 sh	1,404	$231.6K
QTR Family Wealth1,349 sh	1,349	$230.7K
OMERS ADMINISTRATION1,390 sh	1,390	$229.3K
Empirical Finance1,296 sh	1,296	$213.8K
KORNITZER CAPITAL MANAGEMENT1,289 sh	1,289	$212.7K
Fi3 FINANCIAL ADVISORS1,258 sh	1,258	$207.5K
Retirement Planning of New England1,248 sh	1,248	$205.9K
SHELTON CAPITAL MANAGEMENT1,244 sh	1,244	$205.2K
Hamilton Capital Partners1,239 sh	1,239	$204.4K
CX Institutional952 sh	952	$157.0K
Root Financial Partners482 sh	482	$79.5K
QUADRANT CAPITAL GROUP250 sh	250	$69.6K
Destiny Wealth Partners362 sh	362	$59.7K
Colonial / SC351 sh	351	$57.9K
Employees Retirement System of Texas311 sh	311	$51.0K
Wealth Preservation Advisors299 sh	299	$49.3K
Heritage Wealth Advisors235 sh	235	$38.8K
CVA Family Office137 sh	137	$22.6K
Aster Capital Management (DIFC) Ltd104 sh	104	$22.5K
Owl Creek Wealth Partners95 sh	95	$15.7K
Clearstead48 sh	48	$7.9K
TWIN PEAKS WEALTH ADVISORS34 sh	34	$5.6K
Advisory Services Network33 sh	33	$5.5K
High Note Wealth26 sh	26	$4.3K
Dogwood Wealth Management13 sh	13	$2.1K
Marquette Asset Management9 sh	9	$1.5K
FINANCIAL CONSULATE9 sh	9	$1.5K
Ankerstar Wealth6 sh	6	$990.00
Bay Harbor Wealth Management6 sh	6	$989.00
ZRC WEALTH MANAGEMENT5 sh	5	$825.00
Vermillion Wealth Management3 sh	3	$495.00
Cedar Mountain Advisors3 sh	3	$495.00
Sachetta3 sh	3	$495.00
Basecamp Wealth Advisors3 sh	3	$495.00
FIRST HORIZON NATIONAL3 sh	3	$495.00
Rialto Wealth Management2 sh	2	$330.00

And 6 smaller positions.

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.