Latest filingSep 10, 2026Most recent Form 4
AMBA
AMBARELLA INC
NasdaqTechnologySemiconductors & Related Devices
Insider activity for last month from 08/11 to 09/11. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$07 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period7transactions
- A · Grants / awards · dominant7 · 100%
Activity by reported role
A joint filing can contribute to multiple roles7transactions
- Director · dominant7 · 100%
Distinct insiders active
Reporting-owner CIKs by month · peak Sep 2026 (7)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typePaisley Christopher BOrdinary Shares · Direct
44,180Sep 08, 2026
Richardson David JeffreyOrdinary Shares · Direct
5,649Sep 08, 2026
Hon Hsiao-WuenOrdinary Shares · Direct
33,927Sep 08, 2026
Schwarting Elizabeth MOrdinary Shares · Direct
9,841Sep 08, 2026
Breithaupt Chantelle YvetteOrdinary Shares · Direct
8,091Sep 08, 2026
Bryant Gregory MOrdinary Shares · Direct
5,608Sep 08, 2026
Hu ChenmingOrdinary Shares · Direct
32,667Sep 08, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 11 → Sep 11
LessMore
Top insiders
By absolute net value across the selected period- HC+$0
- BM+$0
- BY+$0
- SM+$0
- HH+$0
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
No filing-only signal badges matched this period.
AMBA transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| AMBA | Hu Chenming | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
| AMBA | Bryant Gregory M | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
| AMBA | Breithaupt Chantelle Yvette | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
| AMBA | Schwarting Elizabeth M | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
| AMBA | Hon Hsiao-Wuen | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
| AMBA | RICHARDSON DAVID JEFFREY | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
| AMBA | PAISLEY CHRISTOPHER B | DIR | grant | 3.15k | $0 | A | — | — | 09/10 | 09/08 |
AMBARELLA INC Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at AMBARELLA INC?
Hu Chenming, Bryant Gregory M, Breithaupt Chantelle Yvette, Schwarting Elizabeth M, Hon Hsiao-Wuen, RICHARDSON DAVID JEFFREY, PAISLEY CHRISTOPHER B.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.