Kohn Leslie: insider trades
Officer at Ambarella Inc. No open-market purchases and 53 sales not made under a pre-set plan, reported from October 15, 2012 to September 19, 2025.
What happened after Kohn Leslie’s sales?
After their sales, the shares moved +7.1% against the index over 12 months on average (a negative figure means selling was the right call); 68% trailed it.
Trade by trade
| Measured | Trades counted | Average vs S&P 500 | Median | Went the right way | Years | t-statistic | p-value | Evidence |
|---|---|---|---|---|---|---|---|---|
| Purchases, 3 months after the report | 0 | — | — | — | — | — | — | Not enough years |
| Purchases, 6 months after the report | 0 | — | — | — | — | — | — | Not enough years |
| Purchases, 12 months after the report | 0 | — | — | — | — | — | — | Not enough years |
| Purchases, 12 months after the trade | 0 | — | — | — | — | — | — | Not enough years |
| Sales, 3 months after the report | 53 | +1.6% | −5.5% | 59% | 14 | 0.99 | 0.34 | No reliable evidence |
| Sales, 12 months after the report | 53 | +7.1% | −14.2% | 68% | 14 | 1.22 | 0.24 | No reliable evidence |
| Sales, 12 months after the trade | 53 | +6.4% | −15.9% | 66% | 14 | 1.22 | 0.25 | No reliable evidence |
Companies traded
| Company | Title on the latest filing | Purchases | Sales | First report | Latest report |
|---|---|---|---|---|---|
| Ambarella Inc AMBA | Chief Technology Officer | 0 | 53 | October 15, 2012 | September 19, 2025 |
Trades and what followed
| Reported | Traded | Company | Trade | Value | 3 months after report | 12 months after report | 12 months after trade |
|---|---|---|---|---|---|---|---|
| September 19, 2025 | September 17, 2025 | AMBA | Sale | $178,638 | −20.7% | −40.2% | −34.1% |
| June 20, 2025 | June 17, 2025 | AMBA | Sale | $89,626 | +60.8% | −1.4% | +6.8% |
| March 20, 2025 | March 18, 2025 | AMBA | Sale | $87,152 | −11.7% | −16.6% | −15.1% |
| March 7, 2025 | March 6, 2025 | AMBA | Sale | $127,635 | +3.8% | −11.7% | −20.3% |
| December 18, 2024 | December 16, 2024 | AMBA | Sale | $132,495 | −17.6% | −14.3% | −20.4% |
| September 19, 2024 | September 17, 2024 | AMBA | Sale | $86,092 | +23.0% | +37.9% | +33.0% |
| June 20, 2024 | June 18, 2024 | AMBA | Sale | $90,044 | −6.4% | +4.4% | −17.7% |
| March 20, 2024 | March 18, 2024 | AMBA | Sale | $59,025 | +5.0% | −1.1% | −0.4% |
| March 11, 2024 | March 8, 2024 | AMBA | Sale | $40,469 | −1.9% | −11.7% | −18.0% |
| December 21, 2023 | December 19, 2023 | AMBA | Sale | $107,988 | −29.6% | −10.4% | −15.9% |
| September 20, 2023 | September 18, 2023 | AMBA | Sale | $95,748 | +7.6% | −31.1% | −34.8% |
| June 20, 2023 | June 20, 2023 | AMBA | Sale | $142,634 | −32.8% | −57.7% | −58.6% |
| March 17, 2023 | March 17, 2023 | AMBA | Sale | $913,055 | −5.5% | −68.9% | −69.5% |
| December 20, 2022 | December 16, 2022 | AMBA | Sale | $205,655 | −9.9% | −48.6% | −49.3% |
| September 28, 2022 | September 26, 2022 | AMBA | Sale | $364,252 | +34.5% | −28.2% | −30.2% |
| September 20, 2022 | September 16, 2022 | AMBA | Sale | $156,607 | +26.8% | −33.8% | −29.7% |
| June 17, 2022 | June 16, 2022 | AMBA | Sale | $172,846 | −10.6% | −1.1% | +3.7% |
| March 18, 2022 | March 16, 2022 | AMBA | Sale | $3,474,538 | −13.8% | −10.0% | −10.4% |
| March 14, 2022 | March 14, 2022 | AMBA | Sale | $154,066 | −9.0% | −6.3% | −1.5% |
| December 17, 2021 | December 16, 2021 | AMBA | Sale | $688,279 | −45.7% | −40.6% | −37.8% |
| December 7, 2021 | December 3, 2021 | AMBA | Sale | $657,844 | −50.2% | −49.1% | −50.7% |
| June 17, 2021 | June 16, 2021 | AMBA | Sale | $551,967 | +46.6% | −20.6% | −19.9% |
| March 18, 2021 | March 16, 2021 | AMBA | Sale | $2,510,704 | −14.7% | −22.1% | −29.2% |
| March 11, 2021 | March 9, 2021 | AMBA | Sale | $94,781 | −19.2% | −32.9% | −28.0% |
| September 18, 2020 | September 16, 2020 | AMBA | Sale | $260,103 | +60.2% | +158.9% | +153.0% |
| June 18, 2020 | June 16, 2020 | AMBA | Sale | $254,916 | +0.9% | +64.2% | +58.9% |
| March 30, 2020 | March 27, 2020 | AMBA | Sale | $121,437 | −25.8% | +50.5% | +40.0% |
| March 19, 2020 | March 17, 2020 | AMBA | Sale | $257,607 | −14.2% | +88.4% | +109.3% |
| December 19, 2019 | December 17, 2019 | AMBA | Sale | $192,580 | +2.6% | +37.0% | +41.1% |
| September 18, 2019 | September 17, 2019 | AMBA | Sale | $406,968 | −18.7% | −30.4% | −32.5% |
| June 19, 2019 | June 18, 2019 | AMBA | Sale | $191,100 | +44.8% | +4.3% | +9.7% |
| March 20, 2019 | March 19, 2019 | AMBA | Sale | $155,267 | −4.9% | +8.8% | +3.6% |
| December 20, 2018 | December 18, 2018 | AMBA | Sale | $189,620 | +7.4% | +34.2% | +23.2% |
| September 20, 2018 | September 19, 2018 | AMBA | Sale | $241,093 | +6.3% | +62.1% | +69.8% |
| June 20, 2018 | June 18, 2018 | AMBA | Sale | $134,007 | −20.7% | −8.8% | −7.2% |
| March 20, 2018 | March 16, 2018 | AMBA | Sale | $162,394 | −20.8% | −26.8% | −24.5% |
| December 20, 2017 | December 18, 2017 | AMBA | Sale | $266,182 | −12.9% | −32.8% | −32.1% |
| September 20, 2017 | September 18, 2017 | AMBA | Sale | $300,716 | +20.0% | −35.3% | −41.7% |
| June 20, 2017 | June 16, 2017 | AMBA | Sale | $291,303 | −8.9% | −25.5% | −26.8% |
| March 17, 2017 | March 16, 2017 | AMBA | Sale | $205,768 | −18.0% | −23.0% | −20.8% |
| December 16, 2016 | December 16, 2016 | AMBA | Sale | $275,549 | −4.2% | −14.2% | −13.8% |
| September 20, 2016 | September 16, 2016 | AMBA | Sale | $373,142 | −24.2% | −50.0% | −51.1% |
| June 20, 2016 | June 16, 2016 | AMBA | Sale | $242,960 | +24.7% | −24.9% | −26.9% |
| March 18, 2016 | March 16, 2016 | AMBA | Sale | $157,871 | +33.1% | +24.3% | +29.0% |
| December 18, 2015 | December 16, 2015 | AMBA | Sale | $335,553 | −33.0% | −21.0% | −15.2% |
| September 17, 2015 | September 16, 2015 | AMBA | Sale | $383,382 | −25.6% | −15.8% | −12.7% |
| June 18, 2015 | June 16, 2015 | AMBA | Sale | $636,569 | −33.3% | −56.4% | −56.4% |
| March 19, 2015 | March 17, 2015 | AMBA | Sale | $263,534 | +64.2% | −45.3% | −44.3% |
| December 18, 2014 | December 16, 2014 | AMBA | Sale | $249,995 | +50.4% | +22.6% | +16.9% |
| June 18, 2014 | June 16, 2014 | AMBA | Sale | $73,305 | +34.6% | +298.7% | +317.3% |
| March 20, 2014 | March 18, 2014 | AMBA | Sale | $47,096 | +0.9% | +144.2% | +116.6% |
| December 19, 2013 | December 17, 2013 | AMBA | Sale | $39,821 | −0.3% | +65.3% | +72.9% |
| October 15, 2012 | October 15, 2012 | AMBA | Sale | $420,000 | +91.5% | +237.5% | +232.6% |