David C. Duffy
Insider
First SEC filing: Dec. 6, 2017 · Latest: Dec. 6, 2017
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 23, 2022 | QTRX | S 10b5-1 | 3,266 | $30.00 | $97,980 | 54,730 Direct | -5.63% | Disposed | -87.9% (price as of 2026-10-02) |
| Feb. 4, 2022 | QTRX | S 10b5-1 | 3,266 | $30.91 | $100,952 | 57,996 Direct | -5.33% | Disposed | -88.2% (price as of 2026-10-02) |
| Jan. 31, 2022 | QTRX | S 10b5-1 | 3,266 | $30.00 | $97,980 | 61,262 Direct | -5.06% | Disposed | -87.9% (price as of 2026-10-02) |
| Jan. 3, 2022 | QTRX | M | 4,667 | $2.96 | $13,814 | 27,949 Direct | +20.05% | Acquired | 23.0% (price as of 2026-10-02) |
| Jan. 3, 2022 | QTRX | M | 15,556 | $2.89 | $44,957 | 43,505 Direct | +55.66% | Acquired | 26.0% (price as of 2026-10-02) |
| Jan. 3, 2022 | QTRX | M | 21,023 | $2.28 | $47,932 | 64,528 Direct | +48.32% | Acquired | 59.6% (price as of 2026-10-02) |
| Jan. 3, 2022 | QTRX | M | 4,667 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 3, 2022 | QTRX | M | 15,556 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 3, 2022 | QTRX | M | 21,023 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 29, 2021 | QTRX | S 10b5-1 | 1,667 | $40.71 | $67,864 | 23,282 Direct | -6.68% | Disposed | -91.1% (price as of 2026-10-02) |
| Nov. 19, 2021 | QTRX | S 10b5-1 | 1,667 | $45.54 | $75,915 | 24,949 Direct | -6.26% | Disposed | -92.0% (price as of 2026-10-02) |
| Oct. 15, 2021 | QTRX | S 10b5-1 | 1,667 | $51.47 | $85,800 | 26,616 Direct | -5.89% | Disposed | -92.9% (price as of 2026-10-02) |
| Sept. 22, 2021 | QTRX | S 10b5-1 | 1,667 | $47.72 | $79,549 | 28,283 Direct | -5.57% | Disposed | -92.4% (price as of 2026-10-02) |
| Aug. 20, 2021 | QTRX | S 10b5-1 | 1,667 | $46.13 | $76,899 | 29,950 Direct | -5.27% | Disposed | -92.1% (price as of 2026-10-02) |
| July 14, 2021 | QTRX | S 10b5-1 | 1,667 | $57.77 | $96,303 | 31,617 Direct | -5.01% | Disposed | -93.7% (price as of 2026-10-02) |
| June 23, 2021 | QTRX | S 10b5-1 | 1,667 | $62.11 | $103,537 | 33,284 Direct | -4.77% | Disposed | -94.1% (price as of 2026-10-02) |
| May 28, 2021 | QTRX | S 10b5-1 | 1,667 | $51.00 | $85,017 | 34,951 Direct | -4.55% | Disposed | -92.9% (price as of 2026-10-02) |
| April 15, 2021 | QTRX | S 10b5-1 | 1,667 | $62.14 | $103,587 | 36,618 Direct | -4.35% | Disposed | -94.1% (price as of 2026-10-02) |
| March 19, 2021 | QTRX | S 10b5-1 | 1,667 | $58.36 | $97,286 | 38,285 Direct | -4.17% | Disposed | -93.8% (price as of 2026-10-02) |
| Feb. 11, 2021 | QTRX | S 10b5-1 | 1,667 | $79.62 | $132,727 | 39,952 Direct | -4.01% | Disposed | -95.4% (price as of 2026-10-02) |
| Feb. 8, 2021 | QTRX | A | 2,146 | · | · | 41,619 Direct | +5.44% | Acquired | (price as of 2026-10-02) |
| Feb. 8, 2021 | QTRX | A | 5,008 | · | · | 5,008 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 22, 2021 | QTRX | S 10b5-1 | 1,667 | $79.29 | $132,176 | 39,473 Direct | -4.05% | Disposed | -95.4% (price as of 2026-10-02) |
| Dec. 18, 2020 | QTRX | M | 1,630 | $2.28 | $3,716 | 42,807 Direct | +3.96% | Acquired | 59.6% (price as of 2026-10-02) |
| Dec. 18, 2020 | QTRX | S 10b5-1 | 1,667 | $43.82 | $73,048 | 41,140 Direct | -3.89% | Disposed | -91.7% (price as of 2026-10-02) |
| Dec. 18, 2020 | QTRX | M | 1,630 | · | · | 21,023 Direct | -7.20% | Disposed | (price as of 2026-10-02) |
| Nov. 12, 2020 | QTRX | S 10b5-1 | 1,667 | $49.39 | $82,333 | 41,177 Direct | -3.89% | Disposed | -92.6% (price as of 2026-10-02) |
| Oct. 16, 2020 | QTRX | S 10b5-1 | 1,667 | $43.04 | $71,748 | 42,844 Direct | -3.75% | Disposed | -91.5% (price as of 2026-10-02) |
| Sept. 17, 2020 | QTRX | S 10b5-1 | 1,667 | $32.43 | $54,061 | 44,511 Direct | -3.61% | Disposed | -88.8% (price as of 2026-10-02) |
| Aug. 19, 2020 | QTRX | S 10b5-1 | 1,680 | $34.92 | $58,666 | 46,178 Direct | -3.51% | Disposed | -89.6% (price as of 2026-10-02) |
| July 13, 2020 | QTRX | S 10b5-1 | 1,667 | $27.39 | $45,659 | 47,858 Direct | -3.37% | Disposed | -86.7% (price as of 2026-10-02) |
| June 16, 2020 | QTRX | S 10b5-1 | 1,667 | $26.35 | $43,925 | 49,525 Direct | -3.26% | Disposed | -86.2% (price as of 2026-10-02) |
| May 8, 2020 | QTRX | S 10b5-1 | 1,667 | $26.52 | $44,209 | 51,192 Direct | -3.15% | Disposed | -86.3% (price as of 2026-10-02) |
| April 15, 2020 | QTRX | S 10b5-1 | 1,667 | $20.87 | $34,790 | 52,859 Direct | -3.06% | Disposed | -82.6% (price as of 2026-10-02) |
| March 19, 2020 | QTRX | S 10b5-1 | 1,667 | $11.46 | $19,104 | 54,526 Direct | -2.97% | Disposed | -68.2% (price as of 2026-10-02) |
| Feb. 18, 2020 | QTRX | A | 6,500 | · | · | 56,193 Direct | +13.08% | Acquired | (price as of 2026-10-02) |
| Feb. 18, 2020 | QTRX | A | 15,167 | · | · | 15,167 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 11, 2020 | QTRX | S 10b5-1 | 1,667 | $27.88 | $46,476 | 49,693 Direct | -3.25% | Disposed | -86.9% (price as of 2026-10-02) |
| Jan. 17, 2020 | QTRX | M | 1,941 | $1.93 | $3,746 | 53,301 Direct | +3.78% | Acquired | 88.6% (price as of 2026-10-02) |
| Jan. 17, 2020 | QTRX | S 10b5-1 | 1,941 | $23.99 | $46,565 | 51,360 Direct | -3.64% | Disposed | -84.8% (price as of 2026-10-02) |
| Jan. 17, 2020 | QTRX | M | 1,941 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 18, 2019 | QTRX | M | 6,600 | $2.28 | $15,048 | 51,360 Direct | +14.75% | Acquired | 59.6% (price as of 2026-10-02) |
| Dec. 18, 2019 | QTRX | M | 6,600 | · | · | 24,513 Direct | -21.21% | Disposed | (price as of 2026-10-02) |
| Dec. 16, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| Dec. 16, 2019 | QTRX | S 10b5-1 | 1,667 | $24.15 | $40,258 | 44,760 Direct | -3.59% | Disposed | -84.9% (price as of 2026-10-02) |
| Dec. 16, 2019 | QTRX | M | 1,667 | · | · | 1,941 Direct | -46.20% | Disposed | (price as of 2026-10-02) |
| Nov. 18, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| Nov. 18, 2019 | QTRX | S 10b5-1 | 1,667 | $22.56 | $37,608 | 44,760 Direct | -3.59% | Disposed | -83.9% (price as of 2026-10-02) |
| Nov. 18, 2019 | QTRX | M | 1,667 | · | · | 3,608 Direct | -31.60% | Disposed | (price as of 2026-10-02) |
| Oct. 21, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| Oct. 21, 2019 | QTRX | S 10b5-1 | 1,667 | $20.32 | $33,873 | 44,760 Direct | -3.59% | Disposed | -82.1% (price as of 2026-10-02) |
| Oct. 21, 2019 | QTRX | M | 1,667 | · | · | 5,275 Direct | -24.01% | Disposed | (price as of 2026-10-02) |
| Sept. 16, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| Sept. 16, 2019 | QTRX | S 10b5-1 | 1,667 | $25.68 | $42,809 | 44,760 Direct | -3.59% | Disposed | -85.8% (price as of 2026-10-02) |
| Sept. 16, 2019 | QTRX | M | 1,667 | · | · | 6,942 Direct | -19.36% | Disposed | (price as of 2026-10-02) |
| Aug. 19, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| Aug. 19, 2019 | QTRX | S 10b5-1 | 1,667 | $27.99 | $46,659 | 44,760 Direct | -3.59% | Disposed | -87.0% (price as of 2026-10-02) |
| Aug. 19, 2019 | QTRX | M | 1,667 | · | · | 8,609 Direct | -16.22% | Disposed | (price as of 2026-10-02) |
| July 15, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| July 15, 2019 | QTRX | S 10b5-1 | 1,667 | $29.49 | $49,160 | 44,760 Direct | -3.59% | Disposed | -87.7% (price as of 2026-10-02) |
| July 15, 2019 | QTRX | M | 1,667 | · | · | 10,276 Direct | -13.96% | Disposed | (price as of 2026-10-02) |
| June 17, 2019 | QTRX | M | 1,667 | $1.93 | $3,217 | 46,427 Direct | +3.72% | Acquired | 88.6% (price as of 2026-10-02) |
| June 17, 2019 | QTRX | S | 1,667 | $32.74 | $54,578 | 44,760 Direct | -3.59% | Disposed | -88.9% (price as of 2026-10-02) |
| June 17, 2019 | QTRX | M | 1,667 | · | · | 11,943 Direct | -12.25% | Disposed | (price as of 2026-10-02) |
| May 15, 2019 | QTRX | S | 234 | $21.20 | $4,961 | 44,760 Direct | -0.52% | Disposed | -82.8% (price as of 2026-10-02) |
| May 13, 2019 | QTRX | M | 592 | $1.93 | $1,143 | 46,037 Direct | +1.30% | Acquired | 88.6% (price as of 2026-10-02) |
| May 13, 2019 | QTRX | S | 592 | $21.19 | $12,544 | 45,445 Direct | -1.29% | Disposed | -82.8% (price as of 2026-10-02) |
| May 13, 2019 | QTRX | S | 451 | $20.02 | $9,029 | 44,994 Direct | -0.99% | Disposed | -81.8% (price as of 2026-10-02) |
| May 13, 2019 | QTRX | M | 592 | · | · | 13,610 Direct | -4.17% | Disposed | (price as of 2026-10-02) |
| March 17, 2019 | QTRX | A | 5,633 | · | · | 45,445 Direct | +14.15% | Acquired | (price as of 2026-10-02) |
| March 17, 2019 | QTRX | A | 19,204 | · | · | 19,204 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 31, 2018 | QTRX | M | 1,354 | $1.93 | $2,613 | 37,952 Direct | +3.70% | Acquired | 88.6% (price as of 2026-10-02) |
| Oct. 31, 2018 | QTRX | M | 1,860 | $2.28 | $4,241 | 39,812 Direct | +4.90% | Acquired | 59.6% (price as of 2026-10-02) |
| Oct. 31, 2018 | QTRX | M | 1,860 | · | · | 29,253 Direct | -5.98% | Disposed | (price as of 2026-10-02) |
| Oct. 31, 2018 | QTRX | M | 1,354 | · | · | 14,202 Direct | -8.70% | Disposed | (price as of 2026-10-02) |
| May 10, 2018 | QTRX | A | 18,700 | · | · | 18,700 Direct | · | Acquired | (price as of 2026-10-02) |
| May 10, 2018 | QTRX | A | 5,485 | · | · | 36,598 Direct | +17.63% | Acquired | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Jan. 3, 2022 | QTRX | Stock Option (right to buy) | Common Stock | $2.96 | July 8, 2024 | 4,667 | Disposed |
| Jan. 3, 2022 | QTRX | Stock Option (right to buy) | Common Stock | $2.89 | May 21, 2023 | 15,556 | Disposed |
| Jan. 3, 2022 | QTRX | Stock Option (Right to buy) | Common Stock | $2.28 | Feb. 3, 2022 | 21,023 | Disposed |
| Feb. 8, 2021 | QTRX | Stock Option (right to buy) | Common Stock | $77.79 | Feb. 8, 2031 | 5,008 | Acquired |
| Dec. 18, 2020 | QTRX | Stock Option (Right to buy) | Common Stock | $2.28 | Feb. 3, 2022 | 1,630 | Disposed |
| Feb. 18, 2020 | QTRX | Stock Option (right to buy) | Common Stock | $27.76 | Feb. 18, 2030 | 15,167 | Acquired |
| Jan. 17, 2020 | QTRX | Stock Option (Right to buy) | Common Stock | $1.93 | July 6, 2021 | 1,941 | Disposed |
| Dec. 18, 2019 | QTRX | Stock Option (Right to buy) | Common Stock | $2.28 | Feb. 3, 2022 | 6,600 | Disposed |
| Dec. 16, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| Nov. 18, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| Oct. 21, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| Sept. 16, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| Aug. 19, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| July 15, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| June 17, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,667 | Disposed |
| May 13, 2019 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 592 | Disposed |
| March 17, 2019 | QTRX | Stock Option (right to buy) | Common Stock | $24.87 | March 17, 2029 | 19,204 | Acquired |
| Oct. 31, 2018 | QTRX | Stock Option (Right to Buy) | Common Stock | $2.28 | Feb. 3, 2022 | 1,860 | Disposed |
| Oct. 31, 2018 | QTRX | Stock Option (Right to Buy) | Common Stock | $1.93 | July 6, 2021 | 1,354 | Disposed |
| May 10, 2018 | QTRX | Stock Option (right to buy) | Common Stock | $19.12 | May 10, 2028 | 18,700 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 7 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Dec. 6, 2017 | QTRX | Common Stock | 31,113 | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy) | · | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy) | · | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy) | · | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy) | · | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy) | · | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy) | · | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2017 | $222,343 | $76,708 | · | $212,881 | · | · | · | $511,932 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.