David C. Duffy
CIK 1724566 · View on SEC EDGAR ↗
First SEC filing: Dec. 6, 2017 · Latest: Dec. 6, 2017
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 10, 2018 | QTRX | A | 18,700 | — | — | 18,700 Direct | — | Acquired | (price as of 2026-08-20) |
| May 10, 2018 | QTRX | A | 5,485 | — | — | 36,598 Direct | +17.63% | Acquired | (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| May 10, 2018 | QTRX | Stock Option (right to buy) | Common Stock (18,700) | $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)→ Common Stock | — | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy)→ Common Stock | — | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy)→ Common Stock | — | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy)→ Common Stock | — | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy)→ Common Stock | — | Direct |
| Dec. 6, 2017 | QTRX | Stock Option (right to buy)→ Common Stock | — | 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.