Quanterix Corp (QTRX) — Institutional Holders, Q2 2026

133 institutional investment managers reported a QTRX position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $127.1M. 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.

← QTRX stock profile

QTRX 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

Trimmed

Sold out

Biggest buyers

First Eagle Investment ManagementAdded · +1,453,078 sh+$6.3M
Blue Water Life Science AdvisorsAdded · +1,332,055 sh+$5.8M
AQR CAPITAL MANAGEMENTAdded · +1,258,873 sh+$5.4M
JACOBS LEVY EQUITY MANAGEMENTNew · +487,600 sh+$2.1M
BlackRockAdded · +357,816 sh+$1.5M

Biggest sellers

AMERIPRISE FINANCIALTrimmed · -2,554,950 sh-$11.0M
WILLIAM BLAIR INVESTMENT MANAGEMENTSold out · -2,083,699 sh-$9.0M
Invenomic Capital ManagementSold out · -1,932,386 sh-$8.3M
LEVIN CAPITAL STRATEGIES, L.P.Sold out · -1,464,052 sh-$6.3M
Portolan Capital ManagementTrimmed · -1,046,515 sh-$4.5M

QTRX 13F holders ranked 1–100 of 133

Institutional investors reporting a position in Quanterix Corp on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 3,635,411 sh	3,635,411	$15.7M	<0.01%	+10.9%
2	Blue Water Life Science Advisors#2 · 3,474,202 sh	3,474,202	$15.0M	9.45%	+62.2%
3	First Eagle Investment Management#3 · 2,753,165 sh	2,753,165	$11.9M	0.02%	+111.8%
4	Portolan Capital Management#4 · 1,899,308 sh	1,899,308	$8.2M	0.31%	-35.5%
5	VANGUARD CAPITAL MANAGEMENT#5 · 1,800,644 sh	1,800,644	$7.8M	<0.01%	+0.9%
6	Lionhunter Capital Management#6 · 1,500,427 sh	1,500,427	$6.5M	2.92%	—
7	AQR CAPITAL MANAGEMENT#7 · 1,343,005 sh	1,343,005	$5.8M	<0.01%	+1496.3%
8	GEODE CAPITAL MANAGEMENT#8 · 1,131,377 sh	1,131,377	$4.9M	<0.01%	+13.7%
9	AMERIPRISE FINANCIAL#9 · 987,424 sh	987,424	$4.3M	<0.01%	-72.1%
10	MARSHALL WACE, LLP#10 · 973,872 sh	973,872	$4.2M	<0.01%	+56.5%
11	STATE STREET#11 · 932,307 sh	932,307	$4.0M	<0.01%	+3.8%
12	Tikvah Management#12 · 571,555 sh	571,555	$2.5M	0.75%	0.0%
13	VANGUARD PORTFOLIO MANAGEMENT#13 · 489,566 sh	489,566	$2.1M	<0.01%	-15.1%
14	JACOBS LEVY EQUITY MANAGEMENT#14 · 487,600 sh	487,600	$2.1M	<0.01%	New
15	MORGAN STANLEY#15 · 447,688 sh	447,688	$1.9M	<0.01%	-26.3%
16	JANE STREET GROUP#16 · 419,050 sh	419,050	$1.8M	<0.01%	+169.2%
17	GSA CAPITAL PARTNERS LLP#17 · 410,252 sh	410,252	$1.8M	0.11%	+329.5%
18	TUDOR INVESTMENT ET AL#18 · 400,402 sh	400,402	$1.7M	<0.01%	+26.7%
19	DIMENSIONAL FUND ADVISORS#19 · 397,833 sh	397,833	$1.7M	<0.01%	-10.2%
20	NORTHERN#20 · 337,227 sh	337,227	$1.5M	<0.01%	-3.6%
21	CHARLES SCHWAB INVESTMENT MANAGEMENT#21 · 310,701 sh	310,701	$1.3M	<0.01%	-10.2%
22	VANGUARD FIDUCIARY#22 · 288,311 sh	288,311	$1.2M	<0.01%	+6.6%
23	UBS Group AG#23 · 281,978 sh	281,978	$1.2M	<0.01%	-25.2%
24	Nuveen#24 · 232,592 sh	232,592	$1.0M	<0.01%	+223.8%
25	CITADEL ADVISORS#25 · 229,736 sh	229,736	$992.5K	<0.01%	+276.6%
26	XTX Topco Ltd#26 · 228,035 sh	228,035	$985.1K	0.01%	+104.2%
27	Point72 Asset Management, L.P.#27 · 225,653 sh	225,653	$974.8K	<0.01%	+142.0%
28	GOLDMAN SACHS GROUP#28 · 212,056 sh	212,056	$916.1K	<0.01%	-21.5%
29	FMR#29 · 210,634 sh	210,634	$909.9K	0.00%	+14.9%
30	IRONWOOD INVESTMENT MANAGEMENT#30 · 170,555 sh	170,555	$736.8K	0.25%	+0.4%
31	SUSQUEHANNA INTERNATIONAL GROUP, LLP#31 · 168,620 sh	168,620	$728.4K	<0.01%	+232.5%
32	Invesco Ltd.#32 · 160,887 sh	160,887	$695.0K	<0.01%	+38.4%
33	WELLS FARGO & COMPANY#33 · 149,158 sh	149,158	$644.4K	<0.01%	+15.6%
34	Susquehanna Portfolio Strategies#34 · 148,618 sh	148,618	$642.0K	0.01%	New
35	BNP PARIBAS FINANCIAL MARKETS#35 · 136,876 sh	136,876	$591.3K	<0.01%	+1.8%
36	Bank of New York Mellon#36 · 131,900 sh	131,900	$569.8K	<0.01%	+4.4%
37	SCS Capital Management#37 · 120,035 sh	120,035	$518.6K	<0.01%	0.0%
38	AMERICAN CENTURY COMPANIES#38 · 100,463 sh	100,463	$434.0K	<0.01%	-1.3%
39	PRICE T ROWE ASSOCIATES#39 · 95,626 sh	95,626	$414.0K	0.00%	+39.9%
40	Quadrature Capital Ltd#40 · 80,200 sh	80,200	$346.5K	<0.01%	New
41	Cerity Partners#41 · 78,083 sh	78,083	$337.3K	<0.01%	New
42	BRIDGEWAY CAPITAL MANAGEMENT#42 · 68,226 sh	68,226	$294.7K	<0.01%	0.0%
43	Clearstead Advisors#43 · 62,261 sh	62,261	$269.0K	<0.01%	-49.8%
44	Jain Global#44 · 57,319 sh	57,319	$247.6K	<0.01%	New
45	ALGERT GLOBAL#45 · 55,217 sh	55,217	$238.5K	<0.01%	New
46	RHUMBLINE ADVISERS#46 · 53,557 sh	53,557	$231.4K	<0.01%	+2.9%
47	PEDDOCK CAPITAL ADVISORS#47 · 52,105 sh	52,105	$225.1K	—	0.0%
48	ALLIANCEBERNSTEIN L.P.#48 · 56,780 sh	56,780	$199.9K	<0.01%	+27.7%
49	MILLENNIUM MANAGEMENT#49 · 40,662 sh	40,662	$175.7K	<0.01%	-94.1%
50	SUSQUEHANNA FUNDAMENTAL INVESTMENTS#50 · 38,961 sh	38,961	$168.3K	<0.01%	New
51	CANADA PENSION PLAN INVESTMENT BOARD#51 · 38,100 sh	38,100	$164.6K	<0.01%	New
52	Russell Investments Group, Ltd.#52 · 37,722 sh	37,722	$163.0K	<0.01%	-94.1%
53	DEUTSCHE BANK AG\#53 · 36,678 sh	36,678	$158.4K	0.00%	+3.4%
54	IEQ CAPITAL#54 · 35,507 sh	35,507	$153.4K	<0.01%	New
55	BANK OF AMERICA#55 · 29,286 sh	29,286	$126.5K	0.00%	-40.9%
56	MERCER GLOBAL ADVISORS#56 · 25,731 sh	25,731	$111.2K	<0.01%	+136.6%
57	AXQ CAPITAL#57 · 25,599 sh	25,599	$110.6K	0.01%	+5.1%
58	MetLife Investment Management#58 · 24,801 sh	24,801	$107.1K	<0.01%	+9.9%
59	AIGEN INVESTMENT MANAGEMENT#59 · 24,328 sh	24,328	$105.1K	0.03%	New
60	OSAIC#60 · 24,176 sh	24,176	$104.4K	<0.01%	+6.0%
61	WEALTH ENHANCEMENT ADVISORY SERVICES#61 · 26,914 sh	26,914	$104.4K	—	New
62	Dynamic Technology Lab Private Ltd#62 · 20,816 sh	20,816	$90.0K	0.02%	-73.3%
63	LPL Financial#63 · 20,099 sh	20,099	$86.8K	0.00%	-21.7%
64	JPMORGAN CHASE#64 · 19,049 sh	19,049	$86.5K	0.00%	+9.4%
65	CITIGROUP#65 · 19,713 sh	19,713	$85.2K	0.00%	+904.7%
66	MIRAE ASSET GLOBAL ETFS Ltd.#66 · 19,655 sh	19,655	$84.9K	<0.01%	+0.4%
67	Creative Planning#67 · 18,538 sh	18,538	$80.1K	0.00%	New
68	Vanguard Global Advisers#68 · 18,525 sh	18,525	$80.0K	0.00%	0.0%
69	D. E. Shaw#69 · 17,672 sh	17,672	$76.3K	0.00%	New
70	NISA INVESTMENT ADVISORS#70 · 17,356 sh	17,356	$75.0K	—	New
71	BARCLAYS PLC#71 · 15,805 sh	15,805	$68.3K	0.00%	-5.6%
72	TCG Advisory Services#72 · 15,734 sh	15,734	$68.0K	<0.01%	+15.2%
73	Mariner#73 · 15,471 sh	15,471	$66.8K	<0.01%	New
74	Engineers Gate Manager#74 · 14,807 sh	14,807	$64.0K	<0.01%	-37.8%
75	Jump Financial#75 · 14,700 sh	14,700	$63.5K	<0.01%	-48.3%
76	CAPTRUST FINANCIAL ADVISORS#76 · 14,301 sh	14,301	$61.8K	<0.01%	New
77	MANUFACTURERS LIFE INSURANCE COMPANY, THE#77 · 13,788 sh	13,788	$59.6K	0.00%	+20.8%
78	HighTower Advisors#78 · 13,660 sh	13,660	$59.0K	<0.01%	New
79	Vanguard Personalized Indexing Management#79 · 13,239 sh	13,239	$57.2K	<0.01%	New
80	PharVision Advisers#80 · 13,039 sh	13,039	$56.3K	1.06%	New
81	Schonfeld Strategic Advisors#81 · 12,663 sh	12,663	$54.7K	<0.01%	-70.4%
82	Post Resch Tallon Group#82 · 12,500 sh	12,500	$54.0K	—	0.0%
83	Qube Research & Technologies Ltd#83 · 11,987 sh	11,987	$51.8K	0.00%	New
84	KESTRA PRIVATE WEALTH SERVICES#84 · 11,294 sh	11,294	$48.8K	<0.01%	New
85	IMC-Chicago#85 · 10,214 sh	10,214	$44.1K	0.00%	New
86	Police & Firemen's Retirement System of New Jersey#86 · 10,062 sh	10,062	$43.5K	<0.01%	0.0%
87	Cresset Asset Management#87 · 10,000 sh	10,000	$43.2K	<0.01%	New
88	SRS Capital Advisors#88 · 7,558 sh	7,558	$32.7K	<0.01%	New
89	Integrated Wealth Concepts#89 · 7,224 sh	7,224	$31.2K	<0.01%	New
90	SIMPLEX TRADING#90 · 7,127 sh	7,127	$30.8K	0.00%	New
91	PNC FINANCIAL SERVICES GROUP#91 · 7,123 sh	7,123	$30.8K	0.00%	+352.8%
92	NEW YORK STATE COMMON RETIREMENT FUND#92 · 6,501 sh	6,501	$28.1K	0.00%	0.0%
93	Legal & General Group Plc#93 · 3,993 sh	3,993	$17.3K	0.00%	0.0%
94	Ameritas Investment Partners#94 · 3,475 sh	3,475	$15.0K	<0.01%	0.0%
95	Tower Research Capital (TRC)#95 · 3,108 sh	3,108	$13.4K	<0.01%	-22.0%
96	Sachetta#96 · 3,000 sh	3,000	$13.0K	<0.01%	New
97	Allworth Financial#97 · 2,143 sh	2,143	$9.3K	0.00%	+1830.6%
98	GROUP ONE TRADING, L.P.#98 · 1,933 sh	1,933	$8.4K	0.00%	+121.7%
99	Pinnacle Wealth Planning Services#99 · 1,799 sh	1,799	$7.8K	—	0.0%
100	ROYAL BANK OF CANADA#100 · 1,475 sh	1,475	$7.0K	0.00%	-99.4%

Funds that sold out of QTRX in Q2 2026 (31)

Held QTRX 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 QTRX in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
WILLIAM BLAIR INVESTMENT MANAGEMENT2,083,699 sh	2,083,699	$7.3M
Invenomic Capital Management1,932,386 sh	1,932,386	$6.8M
LEVIN CAPITAL STRATEGIES, L.P.1,464,052 sh	1,464,052	$5.2M
Trium Capital LLP994,217 sh	994,217	$3.5M
Empire Financial Management Company736,068 sh	736,068	$2.6M
ENVESTNET ASSET MANAGEMENT682,711 sh	682,711	$2.4M
Williams Jones Wealth Management613,439 sh	613,439	$2.2M
Topline Capital Management563,135 sh	563,135	$2.0M
Pier Capital492,368 sh	492,368	$1.7M
Parkman Healthcare Partners341,453 sh	341,453	$1.2M
RENAISSANCE TECHNOLOGIES136,207 sh	136,207	$479.4K
Brevan Howard Capital Management87,386 sh	87,386	$307.6K
STATE OF WISCONSIN INVESTMENT BOARD84,124 sh	84,124	$296.1K
HRT FINANCIAL71,686 sh	71,686	$252.0K
PDT Partners47,668 sh	47,668	$167.8K
Quantinno Capital Management47,594 sh	47,594	$167.5K
FOX RUN MANAGEMENT, L.L.C.39,592 sh	39,592	$135.8K
TWO SIGMA INVESTMENTS35,185 sh	35,185	$123.9K
Virtu Financial18,988 sh	18,988	$67.0K
Allspring Global Investments17,216 sh	17,216	$60.6K
INTECH INVESTMENT MANAGEMENT11,666 sh	11,666	$41.1K
Versant Capital Management1,832 sh	1,832	$6.4K
NATIONAL BANK OF CANADA627 sh	627	$2.2K
NBC SECURITIES414 sh	414	$1.5K
SIGNATUREFD387 sh	387	$1.4K
Parallel Advisors270 sh	270	$950.00
LOS ANGELES CAPITAL MANAGEMENT228 sh	228	$803.00
NORTHWESTERN MUTUAL WEALTH MANAGEMENT13 sh	13	$46.00
Advisory Services Network9 sh	9	$32.00
IFP Advisors8 sh	8	$28.00
Covestor Ltd10 sh	10	$0.00

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.