John C. Shoemaker is Director at EXTREME NETWORKS INC (EXTR). They have made 7 open-market trades across 1 company since 2010, most recently 2025-11-12.
CIK 0001299645
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.
6 open-market purchases totalling $1.0M since 2010, against 1 sale. Across 6 scored buys the stock is down 16.4% at ninety days, and 16.7 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 17% | 0% |
| Avg Move | -5.9% | -9.7% | -16.4% |
| Alpha | -2.7% | -6.8% | -16.7% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| EXTR | BUY | 2020-06-05 | 2020-06-08 | $5.11 | $511K | -14.4% | -19.6% | -22.1% |
| EXTR | BUY | 2020-05-17 | 2021-05-19 | $10.00 | $72K | +4.5% | -5.4% | -4.0% |
| EXTR | BUY | 2020-02-10 | 2020-02-12 | $6.08 | $152K | -11.1% | -43.1% | -48.2% |
| EXTR | BUY | 2018-05-11 | 2018-05-14 | $8.40 | $168K | +8.3% | +10.2% | -23.6% |
| EXTR | SELL | 2016-09-15 | 2016-09-19 | $4.25 | $64K | +2.5% | -5.7% | +13.8% |
| EXTR | BUY | 2015-08-31 | 2015-08-31 | $2.90 | $58K | -11.3% | -0.3% | -0.3% |
| EXTR | BUY | 2010-08-17 | 2010-08-18 | $2.66 | $53K | -11.3% | -0.3% | -0.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.