Ralph Brandenberger is CTO at Nkarta, Inc. (NKTX). They have made 12 open-market trades across 1 company since 2021, most recently 2025-01-15.
CIK 0001853197
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 12 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| NKTX | 124,796 | $226K |
Shares reported on the most recent Form 4, priced at the 2025-01-17 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| NKTX | SELL | 2025-01-15 | 2025-01-17 | $2.20 | $16K | -5.6% | -9.2% | -27.6% |
| NKTX | SELL | 2024-06-18 | 2024-06-20 | $5.60 | $1K | -1.5% | +21.2% | -1.3% |
| NKTX | SELL | 2024-03-01 | 2024-03-05 | $12.51 | $209K | -9.7% | -30.2% | -49.3% |
| NKTX | SELL | 2024-01-16 | 2024-01-18 | $8.74 | $22K | +10.0% | +23.0% | -6.3% |
| NKTX | SELL | 2023-06-20 | 2023-06-22 | $4.85 | $1K | -53.2% | -52.5% | -62.5% |
| NKTX | SELL | 2023-01-17 | 2023-01-18 | $5.49 | $3K | -1.4% | +5.6% | -7.2% |
| NKTX | SELL · 10b5-1 | 2022-10-06 | 2022-10-07 | $14.02 | $12K | -8.9% | -16.0% | -54.9% |
| NKTX | SELL | 2022-08-15 | 2022-08-17 | $17.64 | $194K | -14.6% | -22.6% | -37.1% |
| NKTX | SELL | 2022-08-08 | 2022-08-10 | $15.51 | $360K | -1.6% | -8.5% | -27.8% |
| NKTX | SELL · 10b5-1 | 2022-07-25 | 2022-07-26 | $13.41 | $40K | +14.0% | +24.0% | -3.7% |
| NKTX | SELL | 2022-06-03 | 2022-06-07 | $15.00 | $62K | -15.9% | -0.1% | -4.3% |
| NKTX | SELL | 2021-12-01 | 2021-12-03 | $15.64 | $129K | +1.2% | +6.9% | -36.8% |
| NKTX | SELL | 2021-09-01 | 2021-09-02 | $32.08 | $266K | -8.9% | -20.4% | -59.0% |
| NKTX | SELL | 2021-06-02 | 2021-06-04 | $24.50 | $101K | +3.6% | +15.8% | +28.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.