Alan J. Black is CFO & VP at Zendesk, Inc. (ZEN). They have made 3 open-market trades across 1 company since 2014, most recently 2024-12-26.
CIK 0001211433
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 3 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ZEN | SELL | 2016-05-04 | 2016-05-06 | $25.00 | $286K | +1.1% | +13.0% | +21.1% |
| ZEN | SELL | 2016-03-14 | 2016-03-16 | $20.01 | $776K | +5.3% | +11.3% | +39.7% |
| ZEN | SELL | 2016-01-21 | 2016-01-22 | $24.00 | $134K | -7.4% | -23.2% | +1.4% |
| ZEN | SELL · 10b5-1 | 2015-12-15 | 2015-12-16 | $25.82 | $532K | -10.2% | -11.1% | -26.3% |
| ZEN | SELL · 10b5-1 | 2015-11-17 | 2015-11-19 | $24.00 | $494K | -10.2% | +0.3% | -32.8% |
| ZEN | SELL · 10b5-1 | 2015-11-11 | 2015-11-13 | $24.00 | $1.5M | -10.2% | +0.3% | -40.6% |
| ZEN | SELL · 10b5-1 | 2015-11-04 | 2015-11-05 | $24.01 | $444K | -10.2% | +0.3% | -17.4% |
| ZEN | SELL · 10b5-1 | 2015-06-01 | 2015-06-10 | $22.62 | $724K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-03-02 | 2015-03-04 | $24.28 | $121K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-02-23 | 2015-02-25 | $24.10 | $121K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-02-17 | 2015-02-18 | $24.30 | $243K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-02-09 | 2015-02-11 | $25.28 | $253K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-02-02 | 2015-02-04 | $23.27 | $233K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-01-26 | 2015-01-28 | $24.57 | $246K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-01-20 | 2015-01-22 | $24.22 | $242K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-01-12 | 2015-01-14 | $24.88 | $398K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-01-08 | 2015-01-12 | $25.26 | $667K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2015-01-05 | 2015-01-07 | $23.94 | $192K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-12-29 | 2014-12-31 | $24.48 | $245K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-12-24 | 2014-12-29 | $25.00 | $1.2M | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-12-22 | 2014-12-24 | $24.54 | $245K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-12-15 | 2014-12-17 | $22.85 | $183K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-12-08 | 2014-12-09 | $23.47 | $235K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-12-01 | 2015-06-01 | $23.04 | $230K | -10.2% | +0.3% | +0.3% |
| ZEN | SELL · 10b5-1 | 2014-11-24 | 2014-11-26 | $23.92 | $191K | -10.2% | +0.3% | +0.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.