Fmr Llc ownership in QTRX / Quanterix Corporation

Quanterix Corporation

US ˙ NasdaqGM ˙ US74766Q1013

Security	QTRX / Quanterix Corporation
Institution	Fmr Llc
Latest Disclosed Ownership	1,083,647 shares
Ownership	4.88%

2019-02-13 - Fmr Llc has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,083,647 shares of Quanterix Corporation (US:QTRX). This represents 4.881 percent ownership of the company. In their previous filing dated 2018-02-13 , Fmr Llc had reported owning 1,204,471 shares, indicating a decrease of -10.03 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2019-02-13	2019-02-13	13G/A	1,204,471	1,083,647	-10.03	4.88	-11.56
2018-02-13	2018-02-13	13G		1,204,471		5.52

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-15	2026-03-31	13F	QUANTERIX	COM	74766Q101	183,356	23,449	14.66	645	-36.58	0.0000
2026-02-17	2025-12-31	13F	QUANTERIX	COM	74766Q101	159,907	42,774	36.52	1,017	59.91	0.0001
2025-11-13	2025-09-30	13F	QUANTERIX	COM	74766Q101	117,133	-9,499	-7.50	636	-24.47	0.0000
2025-08-14	2025-06-30	13F	QUANTERIX	COM	74766Q101	126,632	28,692	29.30	842	32.18	0.0000
2025-05-12	2025-03-31	13F	QUANTERIX	COM	74766Q101	97,940	15,474	18.76	638	-27.28	0.0000
2025-02-13	2024-12-31	13F	QUANTERIX	COM	74766Q101	82,466	52,224	172.69	877	124.04	0.0001
2024-11-13	2024-09-30	13F	QUANTERIX	COM	74766Q101	30,242	16,020	112.64	392	109.09	0.0000
2024-08-13	2024-06-30	13F	QUANTERIX	COM	74766Q101	14,222	-974	-6.41	188	-47.77	0.0000
2024-05-13	2024-03-31	13F	QUANTERIX	COM	74766Q101	15,196	12,355	434.88	358	364.94	0.0000
2024-02-13	2023-12-31	13F	QUANTERIX	COM	74766Q101	2,841	-833,953	-99.66	78	-99.66	0.0000
2023-11-13	2023-09-30	13F	QUANTERIX	COM	74766Q101	836,794	-1,297,170	-60.79	22,711	-52.81	0.0020
2023-08-11	2023-06-30	13F	QUANTERIX	COM	74766Q101	2,133,964	1,843,382	634.38	48,121	1,369.76	0.0040
2023-08-11	2023-03-31	13F/A-1	QUANTERIX	COM	74766Q101	290,582	220,678	315.69	3,275	238.22	0.0003
2023-05-11	2023-03-31	13F	QUANTERIX	COM	74766Q101	290,582	220,678		3,275		0.0001
2023-02-13	2022-12-31	13F	QUANTERIX	COM	74766Q101	69,904	-255,018	-78.49	968	-72.97	0.0001
2022-11-10	2022-09-30	13F	QUANTERIX	COM	74766Q101	324,922	-2,281,025	-87.53	3,581	-91.51	0.0004
2022-08-12	2022-06-30	13F	QUANTERIX	COM	74766Q101	2,605,947	1,319,824	102.62	42,190	12.38	0.0042
2022-05-13	2022-03-31	13F	QUANTERIX	COM	74766Q101	1,286,123	1,077,105	515.32	37,541	323.57	0.0030
2022-02-14	2021-12-31	13F	QUANTERIX	COM	74766Q101	209,018	-132,370	-38.77	8,863	-47.86	0.0007
2022-02-14	2021-09-30	13F/A-1	QUANTERIX	COM	74766Q101	341,388	-7,951	-2.28	16,998	-17.05	0.0013
2021-11-15	2021-09-30	13F	QUANTERIX	COM	74766Q101	341,388	-7,951		16,998		0.0003
2021-08-13	2021-06-30	13F	QUANTERIX	COM	74766Q101	349,339	3,399	0.98	20,492	1.31	0.0016
2021-05-14	2021-03-31	13F	QUANTERIX	COM	74766Q101	345,940	-12,409	-3.46	20,228	21.39	0.0017
2021-02-08	2020-12-31	13F	QUANTERIX	COM	74766Q101	358,349	-41,132	-10.30	16,663	23.63	0.0015
2020-11-13	2020-09-30	13F	QUANTERIX	COM	74766Q101	399,481	-8,619	-2.11	13,478	20.58	0.0014
2020-08-24	2020-06-30	13F/A-1	QUANTERIX	COM	74766Q101	408,100	-107,987	-20.92	11,178	17.90	0.0012
2020-08-13	2020-06-30	13F	QUANTERIX	COM	74766Q101	408,100	-107,987		11,178		274.6107
2020-05-14	2020-03-31	13F	QUANTERIX	COM	74766Q101	516,087	-372,135	-41.90	9,481	-54.83	0.0013
2020-02-07	2019-12-31	13F	QUANTERIX	COM	74766Q101	888,222	171,844	23.99	20,989	33.42	0.0023
2019-11-13	2019-09-30	13F	QUANTERIX	COM	74766Q101	716,378	43,655	6.49	15,732	-30.79	0.0019
2019-08-13	2019-06-30	13F	QUANTERIX	COM	74766Q101	672,723	-105,191	-13.52	22,731	13.12	0.0027
2019-05-13	2019-03-31	13F	QUANTERIX	COM	74766Q101	777,914	-305,733	-28.21	20,094	1.28	0.0024
2019-02-13	2018-12-31	13F	QUANTERIX	COM	74766Q101	1,083,647	-242,102	-18.26	19,841	-30.13	0.0027
2018-11-09	2018-09-30	13F	QUANTERIX	COM	74766Q101	1,325,749	5,359	0.41	28,398	49.77	0.0032
2018-08-10	2018-06-30	13F	QUANTERIX	COM	74766Q101	1,320,390	2,050	0.16	18,961	-15.59	0.0022
2018-05-14	2018-03-31	13F	QUANTERIX	COM	74766Q101	1,318,340	115,151	9.57	22,464	-13.04	0.0027
2018-02-12	2017-12-31	13F	QUANTERIX	COM	74766Q101	1,203,189	1,203,189		25,833		0.0030

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.