There is a long list of 62 institutional holders of MKTW within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of MKTW by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-MKTW table below, the initial column indicates the name of each top institutional holder of MKTW, with a link to that fund's top holdings. The next columns indicate the amount of MKTW stock held by each of the institutional holders of MKTW, followed by the MKTW position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Greenhaven Road Investment Management L.P.	4,396,616	$12,003	12/31/2023
MKTW	4,396,616	$12,003	12/31/2023
BlackRock Inc.	1,913,901	$5,225	12/31/2023
MKTW	1,913,901	$5,225	12/31/2023
Royce & Associates LP	1,211,400	$3,307	12/31/2023
MKTW	1,211,400	$3,307	12/31/2023
Vanguard Group Inc.	857,417	$2,341	12/31/2023
MKTW	857,417	$2,341	12/31/2023
Geode Capital Management LLC	633,352	$1,729	12/31/2023
MKTW	633,352	$1,729	12/31/2023
State Street Corp	513,417	$1,407	12/31/2023
MKTW	513,417	$1,407	12/31/2023
Formidable Asset Management LLC	451,823	$1,233	12/31/2023
MKTW	451,823	$1,233	12/31/2023
Renaissance Technologies LLC	354,300	$967	12/31/2023
MKTW	354,300	$967	12/31/2023
Northern Trust Corp	237,867	$649	12/31/2023
MKTW	237,867	$649	12/31/2023
Morgan Stanley	181,135	$494	12/31/2023
MKTW	181,135	$494	12/31/2023
Allianz Asset Management GmbH	150,000	$410	12/31/2023
MKTW	150,000	$410	12/31/2023
Barclays PLC	144,437	$394	12/31/2023
MKTW	144,437	$394	12/31/2023
Eschler Asset Management LLP	110,851	$303	12/31/2023
MKTW	110,851	$303	12/31/2023
Bank of New York Mellon Corp	167,176	$289	03/31/2024
MKTW	167,176	$289	03/31/2024
Citadel Advisors LLC		$263	12/31/2023
MKTW	86,033	$235	12/31/2023
Call	20,700	$57	12/31/2023
Put	10,700	$29	12/31/2023
Millennium Management LLC	89,973	$246	12/31/2023
MKTW	89,973	$246	12/31/2023
Penn Mutual Asset Management LLC	75,960	$207	12/31/2023
MKTW	75,960	$207	12/31/2023
Charles Schwab Investment Management Inc.	72,420	$198	12/31/2023
MKTW	72,420	$198	12/31/2023
Invesco Ltd.	48,242	$132	12/31/2023
MKTW	48,242	$132	12/31/2023
Nuveen Asset Management LLC	42,753	$117	12/31/2023
MKTW	42,753	$117	12/31/2023
Deutsche Bank AG	39,256	$107	12/31/2023
MKTW	39,256	$107	12/31/2023
Bank of America Corp DE	38,202	$104	12/31/2023
MKTW	38,202	$104	12/31/2023
Rhumbline Advisers	37,635	$103	12/31/2023
MKTW	37,635	$103	12/31/2023
Jane Street Group LLC	35,791	$98	12/31/2023
MKTW	35,791	$98	12/31/2023
UBS Group AG	35,295	$96	12/31/2023
MKTW	35,295	$96	12/31/2023
JPMorgan Chase & Co.	29,879	$82	12/31/2023
MKTW	29,879	$82	12/31/2023
Occudo Quantitative Strategies LP	28,663	$78	12/31/2023
MKTW	28,663	$78	12/31/2023
State of Wyoming	28,049	$77	12/31/2023
MKTW	28,049	$77	12/31/2023
Heron Bay Capital Management	23,978	$65	12/31/2023
MKTW	23,978	$65	12/31/2023
SG Americas Securities LLC	18,499	$51	12/31/2023
MKTW	18,499	$51	12/31/2023
Bank of Montreal Can	16,530	$50	12/31/2023
MKTW	16,530	$50	12/31/2023
Deuterium Capital Management LLC	18,199	$49	12/31/2023
MKTW	18,199	$49	12/31/2023
Quadrature Capital Ltd	16,624	$46	12/31/2023
MKTW	16,624	$46	12/31/2023
Alliancebernstein L.P.	16,370	$45	12/31/2023
MKTW	16,370	$45	12/31/2023
American International Group Inc.	16,026	$44	12/31/2023
MKTW	16,026	$44	12/31/2023
Goldman Sachs Group Inc.	16,116	$44	12/31/2023
MKTW	16,116	$44	12/31/2023
MTM Investment Management LLC	25,000	$43	03/31/2024
MKTW	25,000	$43	03/31/2024
New York State Common Retirement Fund	12,702	$35	12/31/2023
MKTW	12,702	$35	12/31/2023
Royal Bank of Canada	11,626	$32	12/31/2023
MKTW	11,626	$32	12/31/2023
Marshall Wace LLP	11,400	$31	12/31/2023
MKTW	11,400	$31	12/31/2023
Cresset Asset Management LLC	10,893	$30	12/31/2023
MKTW	10,893	$30	12/31/2023
Mariner LLC	10,113	$28	12/31/2023
MKTW	10,113	$28	12/31/2023
Wells Fargo & Company MN	9,906	$27	12/31/2023
MKTW	9,906	$27	12/31/2023
Group One Trading L.P.		$26	12/31/2023
MKTW	11,125	$30	12/31/2023
Put	4,500	$12	12/31/2023
Call	2,900	$8	12/31/2023
Oliver Lagore Vanvalin Investment Group	9,425	$26	12/31/2023
MKTW	9,425	$26	12/31/2023
Harbor Investment Advisory LLC	13,000	$22	03/31/2024
MKTW	13,000	$22	03/31/2024
California State Teachers Retirement System	5,307	$14	12/31/2023
MKTW	5,307	$14	12/31/2023
Citigroup Inc.	4,780	$13	12/31/2023
MKTW	4,780	$13	12/31/2023
Steward Partners Investment Advisory LLC	3,954	$11	12/31/2023
MKTW	3,954	$11	12/31/2023
Tower Research Capital LLC TRC	3,769	$10	12/31/2023
MKTW	3,769	$10	12/31/2023