Ambiq Micro, Inc.
A maker of ultra-low-power microchips that keep battery-powered gadgets alive far longer, Ambiq designs the Apollo system-on-chip family found inside wearable health trackers like the Fitbit Charge 6, plus software for on-device artificial intelligence. Born in 2010 from University of Michigan research into "subthreshold" computing, it was first incorporated as Cubiq Microchip before being renamed Ambiq in 2012. Its SPOT technology lets chips run at voltages so low that conventional designs fail, a trick the founders turned into a business after watching the industry wrestle with battery life anxiety.
Granted 243.9K
Granted 494.2K · Sold 60.0K
Granted 182.4K · Sold 20.2K
Granted 176.0K · Sold 55.7K
Granted 132.3K · Sold 26.0K
Granted 61.4K · Sold 811
Granted 5.0K · Sold 7.8K
Granted 5.0K · Sold 70.6K
Granted 5.0K
Granted 5.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| HSIEH Wen HsuanDirector · 2 transactions | — | 638.9K | 243.9K | — | — |
| Esaka FumihideChief Executive Officer, Director · 7 transactions | +2467.6% | 436.7K | 494.2K | — | 60.0K |
| Hanson Scott McLeanChief Technology Officer, Director · 8 transactions | +331.1% | 211.2K | 182.4K | — | 20.2K |
| Chen Sean ChihhsiangPresident and COO · 5 transactions | — | 120.3K | 176.0K | — | 55.7K |
| Winzeler Jeffrey GChief Financial Officer · 7 transactions | — | 106.3K | 132.3K | — | 26.0K |
| Connors Michele KimGeneral Counsel · 5 transactions | — | 60.6K | 61.4K | — | 811 |
| Tautges Joseph ADirector · 2 transactions | -5% | 53.7K | 5.0K | — | 7.8K |
| Chen TimothyDirector · 5 transactions | — | 52.6K | 5.0K | — | 70.6K |
| Zhang KerDirector · 1 transaction | +20.8% | 28.8K | 5.0K | — | — |
| Banks Bernard BennettDirector · 1 transaction | — | 5.0K | 5.0K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last year: -241.1K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.