Ambarella (AMBA): Chief Operating Officer sold ~$155K

~$155K

Approx. value · 1,947 sh @ $79.43

127K

Holds after · shares reported

Traded

Sep 17, 2025

Filed

Sep 19, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Sep 10, 2025InsiderOfficer sold ~$717K of AMBA shares in the open market
2. Sep 17, 2025 · this disclosureInsiderOfficer sold ~$155K of AMBA shares in the open market

What came next

1. Sep 17, 2025Insider · 4 peopleInsiders: 4 sales (~$867K)
2. Nov 24, 2025Company filing · Form 8-K · Results, Executive changeChanged a top executive or board member, and reported its results“On November 24, 2025, Leslie Kohn informed the Company’s Board of Directors (the “Board”) of his voluntary resignation as a director on the Board and as Chief Technology Officer of the Company for strictly personal reasons, effective immediately.”

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Ambarella

For Ambarella, OQRO holds 1 insider filing (SEC Form 4 or Form 144) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its AMBA page.

Other recent filings by Chan W Lee, Chief Operating Officer

• SEC Form 4 at Ambarella (AMBA)Jun 20, 2025
• SEC Form 4 at Ambarella (AMBA)Mar 20, 2025
• SEC Form 4 at Ambarella (AMBA)Mar 7, 2025
• SEC Form 4 at Ambarella (AMBA)Jan 17, 2025
• SEC Form 4 at Ambarella (AMBA)Jan 17, 2025

The full history of Chan W Lee, Chief Operating Officer is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Ambarella

• SEC Form 4Sep 28, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 13, 2026
• SEC Form 13F-HRAug 3, 2026
• SEC Form 13F-HRJul 29, 2026
• SEC Form 13F-HRMay 15, 2026

Everything OQRO holds on this company is on its AMBA page.