David B. Elsbree is Director at T2 Biosystems, Inc. (TTOO). They have made 22 open-market trades across 3 companies since 2006, most recently 2024-09-13.
CIK 0001292650
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.
19 open-market purchases totalling $921K since 2006, against 3 sales. Across 10 scored buys the stock is down 1.2% at ninety days, and 2.8 points behind the S&P over the same stretch.
10 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 30% | 60% | 70% |
| Avg Move | -12.0% | -3.8% | -1.2% |
| Alpha | -8.7% | -3.6% | -2.8% |
| Scored | 10 | 10 | 10 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TTOO | SELL | 2024-09-13 | 2024-09-17 | $2.42 | $133 | -9.5% | -38.5% | -83.7% |
| TTOO | SELL · 10b5-1 | 2020-01-03 | 2020-01-07 | $1.16 | $6K | -2.5% | -27.7% | -55.5% |
| TTOO | SELL · 10b5-1 | 2019-06-11 | 2019-06-13 | $1.44 | $5K | -9.1% | -17.1% | +39.6% |
| TTOO | BUY | 2018-06-01 | 2018-06-05 | $7.65 | $32K | +8.2% | -11.5% | -25.1% |
| TTOO | BUY | 2017-11-16 | 2017-11-17 | $4.11 | $6K | +5.6% | +4.5% | +22.7% |
| TTOO | BUY | 2017-06-06 | 2017-06-08 | $3.50 | $35K | +8.3% | -10.5% | +39.1% |
| TTOO | BUY | 2017-03-15 | 2017-03-17 | $5.97 | $60K | -8.6% | -17.4% | -43.9% |
| TTOO | BUY | 2015-12-09 | 2015-12-10 | $9.75 | $98K | -22.2% | -14.9% | -16.7% |
| TTOO | BUY | 2015-08-07 | 2015-08-11 | $13.09 | $982 | -22.2% | +2.3% | +2.3% |
| TTOO | BUY | 2015-05-19 | 2015-05-21 | $16.47 | $103K | -22.2% | +2.3% | +2.3% |
| TTOO | BUY | 2015-03-04 | 2015-03-06 | $15.05 | $22K | -22.2% | +2.3% | +2.3% |
| TTOO | BUY | 2014-11-13 | 2014-11-17 | $14.75 | $22K | -22.2% | +2.3% | +2.3% |
| TTOO | BUY | 2014-08-12 | 2014-08-14 | $11.00 | $165K | -22.2% | +2.3% | +2.3% |
| APKT | BUY | 2012-08-15 | 2012-08-16 | $16.89 | $160K | N/A | N/A | N/A |
| APKT | SELL | 2011-05-04 | 2011-05-06 | $71.79 | $897K | N/A | N/A | N/A |
| APKT | SELL | 2011-03-09 | 2011-03-11 | $71.10 | $889K | N/A | N/A | N/A |
| APKT | BUY | 2011-02-07 | 2011-02-09 | $72.60 | $15K | N/A | N/A | N/A |
| ARTG | SELL · 10b5-1 | 2009-08-06 | 2009-08-10 | $4.00 | $180K | N/A | N/A | N/A |
| ARTG | BUY | 2008-11-06 | 2008-11-10 | $1.81 | $14K | N/A | N/A | N/A |
| APKT | BUY | 2008-02-12 | 2008-02-13 | $7.80 | $39K | N/A | N/A | N/A |
| ARTG | BUY | 2007-05-18 | 2007-05-21 | $2.45 | $29K | N/A | N/A | N/A |
| APKT | BUY | 2007-02-12 | 2007-02-13 | $16.89 | $42K | N/A | N/A | N/A |
| ARTG | BUY | 2007-02-08 | 2007-02-08 | $2.20 | $38K | N/A | N/A | N/A |
| ARTG | BUY | 2006-11-15 | 2006-11-15 | $2.47 | $12K | N/A | N/A | N/A |
| ARTG | BUY | 2006-02-02 | 2006-02-03 | $2.72 | $27K | 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.