Barry J. Simon is President & COO at NantKwest, Inc. (NK). They have made 14 open-market trades across 2 companies since 2016, most recently 2026-10-05.
CIK 0001647994
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 14 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| NK | 3,192,640 | $103.7M |
| IBRX | 2,777,788 | $25.5M |
| Total | $129.3M |
Shares reported on the most recent Form 4, priced at the 2026-10-06 close.
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 |
|---|---|---|---|---|---|---|---|---|
| IBRX | SELL · 10b5-1 | 2026-10-05 | 2026-10-06 | $10.75 | $269K | -3.2% | — | — |
| IBRX | SELL · 10b5-1 | 2026-06-24 | 2026-06-26 | $7.88 | $197K | +6.0% | -16.3% | +3.3% |
| IBRX | SELL · 10b5-1 | 2026-06-04 | 2026-06-05 | $7.18 | $165K | -1.5% | +25.6% | +15.4% |
| IBRX | SELL | 2026-02-24 | 2026-02-26 | $12.01 | $901K | -14.9% | -29.3% | -16.2% |
| IBRX | SELL | 2026-02-20 | 2026-02-24 | $10.19 | $1.8M | -28.8% | -39.5% | -35.0% |
| IBRX | SELL · 10b5-1 | 2026-01-20 | 2026-01-21 | $7.20 | $1.1M | -17.7% | +16.8% | +8.8% |
| IBRX | SELL | 2021-05-21 | 2021-05-25 | $16.14 | $4.0M | -1.7% | -7.3% | -30.7% |
| NK | SELL | 2021-02-05 | 2021-02-08 | $23.09 | $510K | +44.6% | N/A | N/A |
| NK | SELL | 2021-02-02 | 2021-02-04 | $20.65 | $3.4M | +55.8% | +30.3% | N/A |
| NK | SELL | 2021-01-27 | 2021-01-29 | $20.59 | $2.0M | +36.9% | +73.3% | N/A |
| NK | SELL | 2020-12-22 | 2020-12-28 | $18.05 | $2.3M | -1.4% | +36.6% | N/A |
| NK | SELL | 2020-07-20 | 2020-07-22 | $15.53 | $4.0M | -19.5% | -46.2% | -43.5% |
| NK | SELL | 2020-07-08 | 2020-07-10 | $13.14 | $525K | +7.7% | -18.9% | -40.6% |
| NK | SELL · 10b5-1 | 2020-06-30 | 2020-07-02 | $13.00 | $117 | +9.7% | -4.1% | -44.7% |
| NK | SELL | 2020-06-19 | 2020-06-23 | $10.64 | $3.3M | +2.0% | +17.5% | -30.8% |
| NK | SELL | 2020-05-27 | 2020-05-29 | $7.56 | $567K | -10.5% | +55.9% | +5.3% |
| NK | SELL | 2020-05-21 | 2020-05-22 | $5.52 | $408K | +10.9% | +98.8% | +54.1% |
| NK | SELL | 2020-05-11 | 2020-05-13 | $5.50 | $154K | +11.0% | +40.1% | +92.5% |
| NK | SELL | 2016-09-07 | 2016-09-09 | $7.49 | $240K | -5.7% | -8.2% | -20.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.