William L. Marks is Director at ADTRAN INC (ADTN). They have made 13 open-market trades across 3 companies since 2006, most recently 2018-12-31.
CIK 0001186072
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.
8 open-market purchases totalling $623K since 2006, against 5 sales. Across 5 scored buys the stock is up 1.1% at ninety days, and 0.9 points ahead of the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 100% | 100% | 100% |
| Avg Move | +1.6% | +1.1% | +1.1% |
| Alpha | +7.4% | +0.9% | +0.9% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CNL | SELL | 2014-03-03 | 2014-03-04 | $48.84 | $63K | -2.9% | +0.7% | +0.7% |
| CNL | SELL | 2013-08-06 | 2013-08-07 | $48.60 | $116K | -2.9% | +0.7% | +0.7% |
| ADTN | BUY | 2012-07-15 | 2012-07-16 | $21.94 | $189K | +1.6% | +1.1% | +1.1% |
| ADTN | BUY | 2012-07-13 | 2012-07-25 | $21.94 | $189K | +1.6% | +1.1% | +1.1% |
| ADTN | SELL | 2010-08-06 | 2010-08-09 | $31.05 | $311K | +1.6% | +1.1% | +1.1% |
| ADTN | SELL | 2008-02-15 | 2008-02-15 | $19.08 | $361K | +1.6% | +1.1% | +1.1% |
| ADTN | BUY | 2007-10-22 | 2007-10-23 | $23.51 | $19K | +1.6% | +1.1% | +1.1% |
| WTNY | BUY | 2007-08-14 | 2007-08-16 | $24.40 | $92K | N/A | N/A | N/A |
| WTNY | BUY | 2007-07-26 | 2007-07-30 | $26.00 | $55K | N/A | N/A | N/A |
| WTNY | BUY | 2006-10-31 | 2006-11-02 | $32.57 | $16K | N/A | N/A | N/A |
| WTNY | SELL | 2006-08-15 | 2006-08-17 | $35.36 | $1.8M | N/A | N/A | N/A |
| ADTN | BUY | 2006-07-21 | 2006-07-24 | $20.40 | $16K | +1.6% | +1.1% | +1.1% |
| ADTN | BUY | 2006-04-21 | 2006-04-21 | $25.17 | $47K | +1.6% | +1.1% | +1.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.