Allen Nissenson is Chief Medical Officer at DAVITA INC (DVA). They have made 13 open-market trades across 2 companies since 2010, most recently 2026-07-01.
CIK 0001441889
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.
1 open-market purchase totalling $11K since 2022, against 12 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ANGN | BUY | 2022-05-19 | 2022-05-23 | $1.16 | $11K | +25.6% | +61.6% | -19.2% |
| DVA | SELL | 2014-02-13 | 2014-02-18 | $66.16 | $169K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2013-12-17 | 2013-12-18 | $59.83 | $175K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2013-05-13 | 2013-05-15 | $130.37 | $101K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2013-03-06 | 2013-03-08 | $123.77 | $300K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2012-11-15 | 2012-11-16 | $112.50 | $462K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2012-08-06 | 2012-08-08 | $98.91 | $388K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2012-05-23 | 2012-05-25 | $80.00 | $481K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2011-05-17 | 2011-05-19 | $86.00 | $217K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2011-02-25 | 2011-03-01 | $78.50 | $87K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2010-11-09 | 2010-11-12 | $72.41 | $132K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2010-06-17 | 2010-06-21 | $66.22 | $13K | -3.9% | -0.2% | -0.2% |
| DVA | SELL | 2010-03-12 | 2010-03-16 | $62.50 | $263K | -3.9% | -0.2% | -0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.