Robert Hershberg is Director at NanoString Technologies Inc (NSTG). They have made 21 open-market trades across 4 companies since 2020, most recently 2026-08-18.
CIK 0001274139
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 21 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| HLVX | 1,113,399 | $2.3M |
| ADPT | 46,683 | $1.1M |
| ATAI | 100,000 | $735K |
| RXRX | 162,156 | $561K |
| FATE | 10,659 | $19K |
| NSTG | 10,716 | $1K |
| DNDN | 15,724 | — |
| Total | $4.8M |
Shares reported on the most recent Form 4, priced at the 2026-08-20 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ADPT | SELL | 2026-08-18 | 2026-08-20 | $24.40 | $748K | -4.3% | +9.6% | — |
| ATAI | SELL · 10b5-1 | 2026-07-07 | 2026-07-09 | $4.96 | $496K | +32.8% | +35.1% | — |
| ADPT | SELL | 2025-12-10 | 2025-12-12 | $16.00 | $367K | +4.1% | +13.9% | -22.3% |
| ADPT | SELL | 2025-03-12 | 2025-03-12 | $7.59 | $402K | +15.5% | +5.9% | +39.5% |
| HLVX | SELL | 2025-02-04 | 2025-02-12 | $1.83 | $49K | +2.9% | +0.0% | +9.7% |
| HLVX | SELL | 2024-02-08 | 2024-02-12 | $14.93 | $346K | +6.0% | +20.6% | -8.6% |
| FATE | SELL | 2022-06-03 | 2022-06-06 | $22.75 | $15K | -10.4% | +32.5% | +17.1% |
| NSTG | SELL · 10b5-1 | 2021-04-15 | 2021-04-19 | $73.91 | $11K | +13.3% | -29.9% | -18.1% |
| NSTG | SELL | 2021-03-15 | 2021-03-17 | $67.04 | $182K | -12.7% | +8.7% | -11.9% |
| ADPT | SELL | 2021-03-08 | 2021-03-10 | $44.56 | $89K | -0.1% | -5.8% | -17.7% |
| ADPT | SELL | 2021-02-16 | 2021-02-17 | $65.45 | $131K | -5.4% | -31.6% | -42.4% |
| NSTG | SELL · 10b5-1 | 2021-02-16 | 2021-02-18 | $80.37 | $95K | -2.3% | -6.7% | -34.7% |
| NSTG | SELL | 2021-01-15 | 2021-01-19 | $72.34 | $160K | +0.3% | +8.5% | +2.2% |
| ADPT | SELL | 2021-01-15 | 2021-01-20 | $66.47 | $225K | -16.2% | -5.7% | -39.9% |
| NSTG | SELL | 2020-12-15 | 2020-12-16 | $69.52 | $161K | -5.0% | +3.7% | -4.0% |
| ADPT | SELL | 2020-12-15 | 2020-12-16 | $55.86 | $210K | +4.8% | +14.9% | -21.8% |
| NSTG | SELL · 10b5-1 | 2020-11-16 | 2020-11-18 | $46.67 | $70K | +15.2% | +46.0% | +65.9% |
| ADPT | SELL | 2020-11-16 | 2020-11-18 | $47.65 | $180K | +0.1% | +21.9% | +31.4% |
| NSTG | SELL · 10b5-1 | 2020-10-15 | 2020-10-16 | $39.35 | $59K | -9.1% | +13.0% | +79.7% |
| ADPT | SELL | 2020-10-15 | 2020-10-16 | $51.51 | $103K | -0.5% | -8.9% | +28.1% |
| ADPT | SELL | 2020-09-15 | 2020-09-16 | $42.58 | $85K | +10.0% | +17.5% | +27.3% |
| NSTG | SELL | 2020-09-15 | 2020-09-17 | $43.59 | $124K | +1.3% | -12.0% | +50.7% |
| ADPT | SELL | 2020-08-17 | 2020-08-19 | $39.28 | $135K | -3.6% | +7.4% | +6.2% |
| NSTG | SELL · 10b5-1 | 2020-08-17 | 2020-08-19 | $38.37 | $58K | +1.6% | +15.5% | +20.7% |
| ADPT | SELL | 2020-07-15 | 2020-07-17 | $43.85 | $88K | -5.0% | +1.6% | +27.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.