Quanterix Corporation
US ˙ NasdaqGM ˙ US74766Q1013

SecurityQTRX / Quanterix Corporation
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership62,000 shares
Latest Disclosed Value $ 412,300
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series ownership in QTRX / Quanterix Corporation

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 62,000 shares of Quanterix Corporation (US:QTRX) valued at $412,300 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 62,000 shares of Quanterix Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $204,600 USD.

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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-08-26 2025-06-30 NP Quanterix EC US74766Q1013 62,000 0 0.00 412 2.23 0.0093
2025-05-28 2025-03-31 NP Quanterix EC US74766Q1013 62,000 0 0.00 404 -38.85 0.0097
2025-02-25 2024-12-31 NP Quanterix EC US74766Q1013 62,000 -9,641 -13.46 659 -28.99 0.0144
2024-11-26 2024-09-30 NP Quanterix EC US74766Q1013 71,641 5,180 7.79 928 5.82 0.0176
2024-08-26 2024-06-30 NP Quanterix EC US74766Q1013 66,461 3,693 5.88 878 -40.66 0.0179
2024-05-28 2024-03-31 NP Quanterix EC US74766Q1013 62,768 -1,606 -2.49 1,479 -15.97 0.0309
2024-02-26 2023-12-31 NP Quanterix EC US74766Q1013 64,374 4,316 7.19 1,760 7.98 0.0376
2023-11-28 2023-09-30 NP Quanterix EC US74766Q1013 60,058 -1,175 -1.92 1,630 18.04 0.0425
2023-08-25 2023-06-30 NP Quanterix EC US74766Q1013 61,233 8,880 16.96 1,381 133.90 0.0327
2023-05-26 2023-03-31 NP Quanterix EC US74766Q1013 52,353 0 0.00 590 -18.62 0.0157
2023-02-24 2022-12-31 NP Quanterix EC US74766Q1013 52,353 -89 -0.17 725 25.65 0.0199
2022-11-25 2022-09-30 NP Quanterix EC US74766Q1013 52,442 0 0.00 578 -32.04 0.0166
2022-08-25 2022-06-30 NP Quanterix EC US74766Q1013 52,442 3,344 6.81 849 -40.75 0.0234
2022-05-26 2022-03-31 NP Quanterix EC US74766Q1013 49,098 1,605 3.38 1,433 -28.81 0.0334
2022-02-25 2021-12-31 NP Quanterix EC US74766Q1013 47,493 0 0.00 2,014 -14.85 0.0437
2021-11-24 2021-09-30 NP Quanterix EC US74766Q1013 47,493 842 1.80 2,365 -13.60 0.0521
2021-08-26 2021-06-30 NP Quanterix EC US74766Q1013 46,651 10,335 28.46 2,737 28.87 0.0587
2021-05-27 2021-03-31 NP Quanterix EC US74766Q1013 36,316 3,998 12.37 2,123 41.34 0.0482
2021-02-25 2020-12-31 NP Quanterix EC US74766Q1013 32,318 -2,587 -7.41 1,503 27.61 0.0385
2020-11-25 2020-09-30 NP Quanterix EC US74766Q1013 34,905 2,870 8.96 1,178 34.21 0.0378
2020-08-27 2020-06-30 NP Quanterix EC US74766Q1013 32,035 6,661 26.25 877 88.20 0.0287
2020-06-01 2020-03-31 NP Quanterix EC US74766Q1013 25,374 5,586 28.23 466 -0.21 0.0191
2020-02-27 2019-12-31 NP Quanterix EC 74766Q101 19,788 0 0.00 468 7.60 0.0141
2019-11-27 2019-09-30 NP Quanterix EC US74766Q1013 19,788 19,788 435 0.0144
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.