There is a long list of 171 institutional holders of QTRX 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 QTRX by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-QTRX table below, the initial column indicates the name of each top institutional holder of QTRX, with a link to that fund's top holdings. The next columns indicate the amount of QTRX stock held by each of the institutional holders of QTRX, followed by the QTRX 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
BlackRock Inc.	3,190,625	$87,232	12/31/2023
QTRX	3,190,625	$87,232	12/31/2023
Millennium Management LLC	2,209,566	$60,410	12/31/2023
QTRX	2,209,566	$60,410	12/31/2023
Vanguard Group Inc.	2,055,033	$56,185	12/31/2023
QTRX	2,055,033	$56,185	12/31/2023
Lord Abbett & CO. LLC	1,430,277	$39,104	12/31/2023
QTRX	1,430,277	$39,104	12/31/2023
Portolan Capital Management LLC	1,297,090	$35,462	12/31/2023
QTRX	1,297,090	$35,462	12/31/2023
Gilder Gagnon Howe & Co. LLC	1,202,408	$32,874	12/31/2023
QTRX	1,202,408	$32,874	12/31/2023
Dimensional Fund Advisors LP	974,111	$26,635	12/31/2023
QTRX	974,111	$26,635	12/31/2023
Invesco Ltd.	870,026	$23,787	12/31/2023
QTRX	870,026	$23,787	12/31/2023
Ashford Capital Management Inc.	831,885	$22,744	12/31/2023
QTRX	831,885	$22,744	12/31/2023
State Street Corp	809,046	$22,119	12/31/2023
QTRX	809,046	$22,119	12/31/2023
Geode Capital Management LLC	763,846	$20,886	12/31/2023
QTRX	763,846	$20,886	12/31/2023
Pura Vida Investments LLC		$19,994	12/31/2023
QTRX	651,332	$17,807	12/31/2023
Call	80,000	$2,187	12/31/2023
Ameriprise Financial Inc.	670,710	$18,337	12/31/2023
QTRX	670,710	$18,337	12/31/2023
Granahan Investment Management Inc. MA	666,859	$18,232	12/31/2023
QTRX	666,859	$18,232	12/31/2023
Baillie Gifford & Co.	631,573	$17,267	12/31/2023
QTRX	631,573	$17,267	12/31/2023
D. E. Shaw & Co. Inc.	619,173	$16,928	12/31/2023
QTRX	619,173	$16,928	12/31/2023
Emerald Advisers LLC	574,454	$15,706	12/31/2023
QTRX	574,454	$15,706	12/31/2023
Tikvah Management LLC	571,619	$15,628	12/31/2023
QTRX	571,619	$15,628	12/31/2023
Boone Capital Management LLC	568,544	$15,544	12/31/2023
QTRX	568,544	$15,544	12/31/2023
Alliancebernstein L.P.	560,325	$15,319	12/31/2023
QTRX	560,325	$15,319	12/31/2023
Nuveen Asset Management LLC	523,952	$14,325	12/31/2023
QTRX	523,952	$14,325	12/31/2023
Platinum Investment Management Ltd.	510,753	$13,964	12/31/2023
QTRX	510,753	$13,964	12/31/2023
Renaissance Technologies LLC	474,700	$12,978	12/31/2023
QTRX	474,700	$12,978	12/31/2023
Emerald Mutual Fund Advisers Trust	473,753	$12,952	12/31/2023
QTRX	473,753	$12,952	12/31/2023
Prudential Financial Inc.	390,193	$10,668	12/31/2023
QTRX	390,193	$10,668	12/31/2023
Northern Trust Corp	366,073	$10,008	12/31/2023
QTRX	366,073	$10,008	12/31/2023
Morgan Stanley	349,883	$9,566	12/31/2023
QTRX	349,883	$9,566	12/31/2023
Charles Schwab Investment Management Inc.	295,811	$8,087	12/31/2023
QTRX	295,811	$8,087	12/31/2023
Goldman Sachs Group Inc.	291,090	$7,958	12/31/2023
QTRX	291,090	$7,958	12/31/2023
Blue Water Life Science Advisors LLC	288,196	$7,879	12/31/2023
QTRX	288,196	$7,879	12/31/2023
Point72 Asset Management L.P.	276,923	$7,571	12/31/2023
QTRX	276,923	$7,571	12/31/2023
UBS Asset Management Americas Inc.	255,139	$6,975	12/31/2023
QTRX	255,139	$6,975	12/31/2023
Two Sigma Advisers LP	236,248	$6,459	12/31/2023
QTRX	236,248	$6,459	12/31/2023
Boothbay Fund Management LLC	225,000	$6,152	12/31/2023
QTRX	225,000	$6,152	12/31/2023
Royce & Associates LP	215,948	$5,904	12/31/2023
QTRX	215,948	$5,904	12/31/2023
Pier Capital LLC	210,636	$5,759	12/31/2023
QTRX	210,636	$5,759	12/31/2023
Adviser Investments LLC	193,203	$5,282	12/31/2023
QTRX	193,203	$5,282	12/31/2023
Kent Lake Capital LLC	188,849	$5,163	12/31/2023
QTRX	188,849	$5,163	12/31/2023
Farallon Capital Management LLC	184,000	$5,031	12/31/2023
QTRX	184,000	$5,031	12/31/2023
Jacobs Levy Equity Management Inc.	178,130	$4,870	12/31/2023
QTRX	178,130	$4,870	12/31/2023
Frontier Capital Management Co. LLC	176,969	$4,838	12/31/2023
QTRX	176,969	$4,838	12/31/2023
Hillsdale Investment Management Inc.	163,970	$4,483	12/31/2023
QTRX	163,970	$4,483	12/31/2023
Fuller & Thaler Asset Management Inc.	163,230	$4,463	12/31/2023
QTRX	163,230	$4,463	12/31/2023
ExodusPoint Capital Management LP	159,148	$4,351	12/31/2023
QTRX	159,148	$4,351	12/31/2023
Bridger Management LLC	154,900	$4,235	12/31/2023
QTRX	154,900	$4,235	12/31/2023
Parkman Healthcare Partners LLC	146,366	$4,002	12/31/2023
QTRX	146,366	$4,002	12/31/2023
AQR Capital Management LLC	140,607	$3,844	12/31/2023
QTRX	140,607	$3,844	12/31/2023
Bank of New York Mellon Corp	125,353	$3,427	12/31/2023
QTRX	125,353	$3,427	12/31/2023
CWM LLC	135,789	$3,199	03/31/2024
QTRX	135,789	$3,199	03/31/2024
Marathon Capital Management	105,745	$2,891	12/31/2023
QTRX	105,745	$2,891	12/31/2023