Form 4 for QTRX Quanterix Corp
Accepted 2026-05-18 17:34:23 ET · period of report 2026-05-15 · accession 0002120516-26-000008 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-05-18 17:34 | 2026-05-15 | QTRX | Miller Michael Francis | CTO | M - OptEx | — | +1,558 | 34.0K | +5% | — |
| DM | 2026-05-18 17:34 | 2026-05-15 | QTRX | Miller Michael Francis | CTO | F - Tax | $2.75 | -467 | 33.7K | -1% | -$1,284 |
| DM | 2026-05-18 17:34 | 2026-05-15 | QTRX | Miller Michael Francis | CTO | M - OptEx | $0.00 | -1,558 | 27.5K | -5% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-15 | M | A | 81 | — | 32,694 | D | — | — | (F1) Restricted stock units convert into common stock on a one-for-one basis. |
| 2 | Common | Common Stock | 2026-05-15 | F | D | 25 | $2.75 | 32,669 | D | — | — | |
| 3 | Common | Common Stock | 2026-05-15 | M | A | 136 | — | 32,805 | D | — | — | (F1) Restricted stock units convert into common stock on a one-for-one basis. |
| 4 | Common | Common Stock | 2026-05-15 | F | D | 41 | $2.75 | 32,764 | D | — | — | |
| 5 | Common | Common Stock | 2026-05-15 | M | A | 135 | — | 32,899 | D | — | — | (F1) Restricted stock units convert into common stock on a one-for-one basis. |
| 6 | Common | Common Stock | 2026-05-15 | F | D | 41 | $2.75 | 32,858 | D | — | — | |
| 7 | Common | Common Stock | 2026-05-15 | M | A | 372 | — | 33,230 | D | — | — | (F1) Restricted stock units convert into common stock on a one-for-one basis. |
| 8 | Common | Common Stock | 2026-05-15 | F | D | 111 | $2.75 | 33,119 | D | — | — | |
| 9 | Common | Common Stock | 2026-05-15 | M | A | 834 | — | 33,953 | D | — | — | (F1) Restricted stock units convert into common stock on a one-for-one basis. |
| 10 | Common | Common Stock | 2026-05-15 | F | D | 249 | $2.75 | 33,704 | D | — | — | |
| 11 | Derivative | Restricted Stock Unit | 2026-05-15 | M | D | 81 | $0.00 | 760 | D | $0.00 · — to — | 81 Common Stock | (F2) On February 6, 2023, the reporting person was granted 3,929 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. (F2) On February 6, 2023, the reporting person was granted 3,929 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. |
| 12 | Derivative | Restricted Stock Unit | 2026-05-15 | M | D | 136 | $0.00 | 1,389 | D | $0.00 · — to — | 136 Common Stock | (F3) On March 15, 2023, the reporting person was granted 6,566 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. (F3) On March 15, 2023, the reporting person was granted 6,566 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. |
| 13 | Derivative | Restricted Stock Unit | 2026-05-15 | M | D | 135 | $0.00 | 2,846 | D | $0.00 · — to — | 135 Common Stock | (F4) On February 2, 2024, the reporting person was granted 6,494 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. (F4) On February 2, 2024, the reporting person was granted 6,494 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. |
| 14 | Derivative | Restricted Stock Unit | 2026-05-15 | M | D | 372 | $0.00 | 8,945 | D | $0.00 · — to — | 372 Common Stock | (F5) On May 21, 2024, the reporting person was granted 17,878 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. (F5) On May 21, 2024, the reporting person was granted 17,878 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. |
| 15 | Derivative | Restricted Stock Unit | 2026-05-15 | M | D | 834 | $0.00 | 27,525 | D | $0.00 · — to — | 834 Common Stock | (F6) On February 4, 2025, the reporting person was granted 40,036 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. (F6) On February 4, 2025, the reporting person was granted 40,036 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. |