Derrick Sung is CFO at Pulmonx Corp (LUNG). They have made 18 open-market trades across 2 companies since 2018, most recently 2025-12-01.
CIK 0001670118
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 18 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| LUNG | SELL | 2023-09-01 | 2023-09-06 | $10.00 | $42K | -4.3% | -9.0% | +5.3% |
| LUNG | SELL | 2023-06-01 | 2023-06-02 | $11.49 | $49K | +1.5% | +3.3% | -16.7% |
| LUNG | SELL | 2023-03-01 | 2023-03-03 | $11.03 | $14K | -5.4% | -8.0% | +2.7% |
| LUNG | SELL | 2022-12-01 | 2022-12-05 | $5.93 | $6K | +15.9% | +33.9% | +91.1% |
| LUNG | SELL | 2022-09-01 | 2022-09-06 | $17.87 | $19K | +2.7% | -4.9% | -65.3% |
| LUNG | SELL | 2022-06-01 | 2022-06-03 | $18.05 | $19K | -21.9% | -11.3% | -3.6% |
| LUNG | SELL | 2022-03-01 | 2022-03-03 | $25.91 | $12K | -8.8% | +9.9% | -25.0% |
| LUNG | SELL | 2021-12-14 | 2021-12-16 | $31.32 | $281K | +5.9% | -15.0% | -23.8% |
| LUNG | SELL | 2021-12-01 | 2021-12-03 | $32.73 | $13K | +9.6% | +20.9% | -18.7% |
| LUNG | SELL | 2021-09-20 | 2021-09-21 | $37.40 | $332K | +0.3% | +4.6% | -18.4% |
| LUNG | SELL | 2021-09-01 | 2021-09-03 | $40.09 | $15K | -5.9% | -9.3% | -26.4% |
| LUNG | SELL | 2021-04-05 | 2021-04-06 | $47.32 | $908K | -4.4% | -8.8% | -4.2% |
| IRTC | SELL | 2019-01-30 | 2019-01-31 | $84.00 | $168K | -0.7% | +10.9% | -13.9% |
| IRTC | SELL | 2019-01-28 | 2019-01-30 | $84.04 | $1.7M | -3.0% | +13.5% | -11.0% |
| IRTC | SELL | 2018-10-16 | 2018-10-17 | $88.01 | $880K | -10.8% | -13.4% | -3.0% |
| IRTC | SELL | 2018-10-09 | 2018-10-10 | $83.10 | $831K | -1.4% | -4.2% | -9.2% |
| IRTC | SELL | 2018-08-02 | 2018-08-06 | $82.01 | $820K | -0.6% | +12.2% | -5.8% |
| IRTC | SELL | 2018-05-18 | 2018-05-21 | $70.00 | $700K | +7.3% | +15.8% | +19.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.