David Jeffrey Richardson is Director at AMBARELLA INC (AMBA). They have made 14 open-market trades across 4 companies since 2008, most recently 2026-10-05.
CIK 0001329724
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 14 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| LSI | 469,074 | $62.4M |
| LSCC | 5,945 | $616K |
| AMBA | 5,649 | $348K |
| KLIC | 2,451 | $193K |
| NASDQ | 217,603 | — |
| VLTR | 3,600 | — |
| Total | $63.6M |
Shares reported on the most recent Form 4, priced at the 2026-10-07 close. 2 holdings could not be priced and are excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| LSCC | SELL | 2026-02-25 | 2026-02-26 | $100.72 | $1.3M | -3.8% | -10.5% | +55.2% |
| KLIC | SELL | 2026-02-25 | 2026-02-27 | $72.20 | $676K | -4.1% | -9.6% | +53.2% |
| AMBA | SELL | 2023-12-06 | 2023-12-08 | $58.75 | $473K | +5.3% | -1.5% | -0.8% |
| LSCC | SELL | 2023-08-22 | 2023-08-24 | $91.62 | $4.0M | +6.8% | -6.5% | -35.3% |
| LSCC | SELL | 2023-05-08 | 2023-05-10 | $84.23 | $1.9M | +0.9% | -3.2% | +9.5% |
| AMBA | SELL | 2021-12-09 | 2021-12-10 | $216.00 | $1.7M | -5.4% | -26.0% | -57.7% |
| LSCC | SELL | 2020-08-20 | 2020-08-25 | $29.01 | $1.1M | -4.8% | -6.1% | +39.4% |
| AMBA | SELL | 2020-06-05 | 2020-06-08 | $54.92 | $819K | -5.7% | -10.0% | -10.8% |
| LSCC | SELL | 2019-08-05 | 2019-08-07 | $18.57 | $494K | +2.0% | +7.5% | +8.4% |
| AMBA | SELL | 2018-09-12 | 2018-09-14 | $39.93 | $814K | +0.7% | -9.4% | +0.8% |
| AMBA | SELL | 2015-03-12 | 2015-03-13 | $68.93 | $53K | -18.1% | -0.6% | -0.6% |
| LSI | SELL | 2014-01-24 | 2014-01-28 | $11.01 | $2.0M | -5.7% | -2.0% | -2.0% |
| LSI | SELL · 10b5-1 | 2013-09-10 | 2013-09-11 | $7.96 | $609K | -5.7% | -2.0% | -2.0% |
| NASDQ | SELL · 10b5-1 | 2013-01-02 | 2013-01-04 | $7.47 | $486K | N/A | N/A | N/A |
| LSI | SELL | 2009-05-12 | 2009-05-14 | $4.04 | $99K | -5.7% | -2.0% | -2.0% |
| LSI | SELL | 2008-07-25 | 2008-07-28 | $6.93 | $298K | -5.7% | -2.0% | -2.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.