There is a long list of 143 institutional holders of XMTR 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 XMTR by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-XMTR table below, the initial column indicates the name of each top institutional holder of XMTR, with a link to that fund's top holdings. The next columns indicate the amount of XMTR stock held by each of the institutional holders of XMTR, followed by the XMTR 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
Primecap Management Co. CA	6,652,858	$238,904	12/31/2023
XMTR	6,652,858	$238,904	12/31/2023
Brown Capital Management LLC	5,969,016	$214,347	12/31/2023
XMTR	5,969,016	$214,347	12/31/2023
Eventide Asset Management LLC		$206,323	12/31/2023
XMTR	5,690,345	$204,340	12/31/2023
NOTE 1	2,100,000	$1,983	12/31/2023
Vanguard Group Inc.	3,800,370	$136,471	12/31/2023
XMTR	3,800,370	$136,471	12/31/2023
Price T Rowe Associates Inc. MD	2,711,668	$97,377	12/31/2023
XMTR	2,711,668	$97,377	12/31/2023
BlackRock Inc.		$97,081	12/31/2023
XMTR	2,660,277	$95,531	12/31/2023
NOTE 1	1,650,000	$1,550	12/31/2023
FMR LLC	2,479,041	$89,022	12/31/2023
XMTR	2,479,041	$89,022	12/31/2023
Fred Alger Management LLC	2,081,030	$74,730	12/31/2023
XMTR	2,081,030	$74,730	12/31/2023
Owls Nest Partners IA LLC	1,945,647	$69,868	12/31/2023
XMTR	1,945,647	$69,868	12/31/2023
Alkeon Capital Management LLC	1,100,897	$39,533	12/31/2023
XMTR	1,100,897	$39,533	12/31/2023
New York State Common Retirement Fund	1,093,862	$39,281	12/31/2023
XMTR	1,093,862	$39,281	12/31/2023
Clearbridge Investments LLC	1,052,692	$37,802	12/31/2023
XMTR	1,052,692	$37,802	12/31/2023
Wolverine Asset Management LLC		$37,075	12/31/2023
NOTE 1	39,467,000	$37,082	12/31/2023
Put	200	$7	12/31/2023
Context Capital Management LLC		$31,984	12/31/2023
NOTE 1	33,863,000	$31,984	12/31/2023
Highbridge Capital Management LLC		$30,289	12/31/2023
BOND	32,850,000	$30,289	12/31/2023
Whitebox Advisors LLC		$29,815	12/31/2023
NOTE 1	31,735,000	$29,815	12/31/2023
Geode Capital Management LLC	823,953	$29,592	12/31/2023
XMTR	823,953	$29,592	12/31/2023
Shaolin Capital Management LLC		$28,111	12/31/2023
NOTE 1	30,000,000	$28,111	12/31/2023
State Street Corp	751,986	$27,004	12/31/2023
XMTR	751,986	$27,004	12/31/2023
Janus Henderson Group PLC	711,048	$25,534	12/31/2023
XMTR	711,048	$25,534	12/31/2023
Wellington Management Group LLP	589,400	$21,165	12/31/2023
XMTR	589,400	$21,165	12/31/2023
Blair William & Co. IL	485,730	$17,443	12/31/2023
XMTR	485,730	$17,443	12/31/2023
CNH Partners LLC		$16,907	12/31/2023
NOTE 1	17,901,000	$16,907	12/31/2023
Foundry Group Next LLC	400,000	$14,364	12/31/2023
XMTR	400,000	$14,364	12/31/2023
Glynn Capital Management LLC	361,747	$12,990	12/31/2023
XMTR	361,747	$12,990	12/31/2023
Northern Trust Corp	328,655	$11,802	12/31/2023
XMTR	328,655	$11,802	12/31/2023
Charles Schwab Investment Management Inc.	304,341	$10,929	12/31/2023
XMTR	304,341	$10,929	12/31/2023
Ameriprise Financial Inc.	274,049	$9,841	12/31/2023
XMTR	274,049	$9,841	12/31/2023
DeepCurrents Investment Group LLC		$8,598	12/31/2023
NOTE 1	9,150,000	$8,598	12/31/2023
Morgan Stanley	217,239	$7,801	12/31/2023
XMTR	217,239	$7,801	12/31/2023
Sei Investments Co.	213,802	$7,678	12/31/2023
XMTR	213,802	$7,678	12/31/2023
Marathon Partners Equity Management LLC	205,500	$7,380	12/31/2023
XMTR	205,500	$7,380	12/31/2023
Zevenbergen Capital Investments LLC	199,495	$7,164	12/31/2023
XMTR	199,495	$7,164	12/31/2023
Voloridge Investment Management LLC	184,909	$6,640	12/31/2023
XMTR	184,909	$6,640	12/31/2023
Vitruvian Partners LLP	166,222	$5,969	12/31/2023
XMTR	166,222	$5,969	12/31/2023
Lisanti Capital Growth LLC	138,465	$4,972	12/31/2023
XMTR	138,465	$4,972	12/31/2023
Raymond James & Associates	287,299	$4,852	03/31/2024
XMTR	287,299	$4,852	03/31/2024
Cerity Partners LLC	133,442	$4,792	12/31/2023
XMTR	133,442	$4,792	12/31/2023
Dimensional Fund Advisors LP	128,967	$4,631	12/31/2023
XMTR	128,967	$4,631	12/31/2023
JPMorgan Chase & Co.		$4,351	12/31/2023
BOND	2,553,000	$2,354	12/31/2023
XMTR	55,622	$1,997	12/31/2023
Citadel Advisors LLC		$4,268	12/31/2023
XMTR	93,960	$3,374	12/31/2023
Call	38,400	$1,379	12/31/2023
Put	13,500	$485	12/31/2023
Bank of America Corp DE	117,714	$4,227	12/31/2023
XMTR	117,714	$4,227	12/31/2023
Nuveen Asset Management LLC	101,699	$3,652	12/31/2023
XMTR	101,699	$3,652	12/31/2023
Crestwood Capital Management L.P.	97,570	$3,504	12/31/2023
XMTR	97,570	$3,504	12/31/2023
Goldman Sachs Group Inc.	89,711	$3,222	12/31/2023
XMTR	89,711	$3,222	12/31/2023
HBK Sorce Advisory LLC	84,009	$3,017	12/31/2023
XMTR	84,009	$3,017	12/31/2023
Nicholas Investment Partners LP	82,172	$2,951	12/31/2023
XMTR	82,172	$2,951	12/31/2023
Swiss National Bank	75,900	$2,726	12/31/2023
XMTR	75,900	$2,726	12/31/2023
Credit Suisse AG		$2,707	12/31/2023
NOTE 1	1,482,000	$1,482	12/31/2023
XMTR	34,124	$1,225	12/31/2023
Susquehanna Portfolio Strategies LLC	72,431	$2,601	12/31/2023
XMTR	72,431	$2,601	12/31/2023