Stanley C. Erck is CEO & President at NOVAVAX INC (NVAX). They have made 21 open-market trades across 4 companies since 2008, most recently 2026-06-17.
CIK 0001342826
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.
13 open-market purchases totalling $813K since 2009, against 8 sales. Across 13 scored buys the stock is up 2.5% at ninety days, and 0.4 points ahead of the S&P over the same stretch.
13 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 15% | 15% | 31% |
| Avg Move | -14.9% | -1.3% | +2.5% |
| Alpha | -11.1% | -2.6% | +0.4% |
| Scored | 13 | 13 | 13 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MXCT | BUY | 2025-08-13 | 2025-08-13 | $1.37 | $137K | -7.9% | -4.0% | +2.6% |
| MXCT | SELL · 10b5-1 | 2024-11-01 | 2024-11-05 | $3.72 | $355K | -14.5% | -10.5% | +8.8% |
| MXCT | SELL · 10b5-1 | 2024-10-01 | 2024-10-02 | $3.75 | $358K | +2.1% | -0.5% | +9.8% |
| MXCT | SELL · 10b5-1 | 2024-09-03 | 2024-09-05 | $4.02 | $383K | +3.5% | -4.5% | -7.3% |
| NVAX | SELL | 2021-10-04 | 2021-10-05 | $176.03 | $12.4M | -1.2% | +9.4% | -12.9% |
| NVAX | SELL | 2021-10-01 | 2021-10-05 | $175.04 | $16.6M | -1.2% | +9.4% | -12.9% |
| NVAX | SELL | 2021-07-01 | 2021-07-06 | $214.38 | $45.1M | -13.4% | +9.6% | -17.3% |
| NVAX | SELL | 2020-11-16 | 2020-11-18 | $90.65 | $9.5M | +38.7% | +40.3% | +195.2% |
| NVAX | SELL | 2020-09-30 | 2020-10-01 | $109.75 | $2.1M | +15.3% | -19.0% | +17.0% |
| NVAX | SELL | 2020-09-28 | 2020-09-30 | $110.07 | $6.0M | +0.9% | -26.1% | +10.1% |
| NVAX | BUY | 2018-05-14 | 2018-05-15 | $1.65 | $165K | -1.8% | -5.3% | -20.5% |
| NVAX | BUY | 2017-11-09 | 2017-11-13 | $1.13 | $226K | +25.2% | +7.3% | +63.4% |
| NVAX | BUY | 2017-05-11 | 2017-05-11 | $0.84 | $42K | +10.2% | +14.5% | +7.0% |
| NVAX | SELL | 2016-03-30 | 2016-04-01 | $5.18 | $4.4M | +2.2% | -2.4% | +33.4% |
| NVAX | BUY | 2016-01-31 | 2016-02-01 | $4.38 | $9K | -8.3% | -2.4% | +7.7% |
| NVAX | BUY | 2015-07-31 | 2015-08-04 | $2.28 | $7K | -26.3% | -3.5% | -3.5% |
| NVAX | BUY | 2015-01-31 | 2015-02-03 | $2.28 | $14K | -26.3% | -3.5% | -3.5% |
| NVAX | BUY | 2014-07-31 | 2014-08-04 | $2.28 | $15K | -26.3% | -3.5% | -3.5% |
| NVAX | BUY | 2014-03-25 | 2014-03-25 | $4.27 | $43K | -26.3% | -3.5% | -3.5% |
| NVAX | BUY | 2014-01-31 | 2014-02-04 | $2.29 | $27K | -26.3% | -3.5% | -3.5% |
| NVAX | BUY | 2011-08-19 | 2011-08-23 | $1.26 | $16K | -26.3% | -3.5% | -3.5% |
| NVAX | BUY | 2011-08-09 | 2011-08-11 | $1.24 | $62K | -26.3% | -3.5% | -3.5% |
| BCRX | BUY | 2009-03-12 | 2009-03-16 | $1.22 | $49K | -26.4% | -2.7% | -2.7% |
| IOMI | SELL | 2008-07-29 | 2008-07-31 | $6.56 | $906K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.