Dick Allen is Director at TANDEM DIABETES CARE INC (TNDM). They have made 15 open-market trades across 1 company since 2014, most recently 2026-05-21.
CIK 0001582779
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 $801K since 2014, against 9 sales. Across 6 scored buys the stock is up 99.8% at ninety days, and 95.1 points ahead of the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| TNDM | 28,146 | $457K |
Shares reported on the most recent Form 4, priced at the 2026-05-22 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 50% | 50% |
| Avg Move | -18.7% | +14.4% | +99.8% |
| Alpha | -29.9% | +12.1% | +95.1% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TNDM | SELL | 2024-05-30 | 2024-06-03 | $51.68 | $258K | -11.2% | -22.2% | -18.4% |
| TNDM | BUY | 2023-11-27 | 2023-11-29 | $18.96 | $95K | +18.8% | +47.8% | +36.6% |
| TNDM | BUY | 2023-05-18 | 2023-05-22 | $29.47 | $295K | -16.9% | -9.7% | -6.7% |
| TNDM | SELL | 2021-07-30 | 2021-08-03 | $107.00 | $270K | +2.6% | +8.6% | +30.8% |
| TNDM | SELL | 2020-11-09 | 2020-11-12 | $107.65 | $4.4M | -12.8% | -8.5% | -0.5% |
| TNDM | SELL | 2020-05-07 | 2020-05-08 | $89.00 | $267K | -0.1% | -3.8% | +23.8% |
| TNDM | SELL | 2020-02-26 | 2020-02-28 | $78.82 | $440K | -13.5% | -11.3% | +8.5% |
| TNDM | SELL | 2020-01-29 | 2020-01-31 | $75.91 | $1.0M | +8.1% | +5.1% | +6.4% |
| TNDM | SELL | 2019-05-02 | 2019-05-03 | $61.34 | $1.0M | +5.2% | +5.7% | -7.1% |
| TNDM | SELL | 2019-03-08 | 2019-03-11 | $62.62 | $1.3M | +12.7% | -1.1% | +2.5% |
| TNDM | SELL | 2018-11-05 | 2018-11-07 | $38.02 | $1.2M | -23.8% | -15.1% | +10.3% |
| TNDM | BUY | 2018-03-06 | 2018-03-07 | $3.88 | $90K | -5.0% | +42.3% | +280.9% |
| TNDM | BUY | 2018-02-09 | 2018-02-13 | $2.00 | $120K | +20.2% | +49.6% | +332.0% |
| TNDM | BUY | 2016-02-26 | 2016-02-29 | $8.24 | $82K | -64.7% | -22.0% | -22.0% |
| TNDM | BUY | 2014-12-12 | 2014-12-15 | $11.95 | $120K | -64.7% | -22.0% | -22.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.