Ambarella Inc SEC Filings

Ambarella (NASDAQ:AMBA) filed a Form 144 on June 29 2025 detailing a proposed sale of 1,000 common shares by insider Christopher B. Paisley through Fidelity Brokerage Services. The shares are valued at roughly $62,580, a fraction (<0.01%) of the company’s 42.4 million shares outstanding.

The stock to be sold stems from restricted-stock awards that vested in 2016 (341 shares) and 2019 (659 shares). The notice indicates an expected sale date of June 25 2025 on Nasdaq. It also discloses that Paisley sold 500 shares for $27,750 on March 25 2025. No additional financial data, risk factors, or strategic developments are included in the filing.

Ambarella CFO John Alexander Young reported a sale of 2,435 ordinary shares on June 17, 2025, at a price of $52.26 per share. The transaction was specifically executed to cover tax obligations arising from the vesting of restricted stock units (RSUs).

Following the reported transaction, Young continues to hold 111,451 shares directly. The Form 4 filing indicates this was a routine tax-related sale rather than a discretionary transaction, which is common practice among executives when RSUs vest.

The filing was submitted through Young's attorney-in-fact, Michael Morehead, on June 20, 2025. This transaction represents a relatively small adjustment to Young's overall holdings in Ambarella, maintaining significant direct ownership in the company while fulfilling tax obligations.

Ambarella, Inc. (AMBA) – Form 4 insider transaction

On 06/17/2025, Christopher Day, Ambarella’s Vice President of Marketing, reported the sale of 342 ordinary shares at an average price of $52.26 per share. The shares were automatically sold to cover withholding taxes triggered by the vesting of restricted stock units, a routine administrative event disclosed in the filing. After the transaction, Day retains 15,099 shares of AMBA common stock, indicating that more than 97 % of his direct holdings remain intact. No derivative security activity was reported, and there are no indications of additional open‐market sales. Given the small size relative to both the executive’s total holdings and Ambarella’s public float, the filing is unlikely to carry material valuation implications for investors.

Ambarella, Inc. (AMBA) – Form 4 Insider Transaction

Chief Operating Officer Chan W. Lee filed a Form 4 reporting a sale of 1,601 ordinary shares on 17 June 2025 at an average price of $52.26. The disclosure states the shares were sold to satisfy tax obligations arising from the vesting of restricted stock units (RSUs). Following the transaction, Lee’s direct ownership stands at 128,696 shares.

No derivative securities were involved and no Rule 10b5-1 trading plan was indicated in the filing. The sale represents roughly 1.2 % of Lee’s reported holdings, a level generally considered routine for tax-withholding purposes rather than a material reduction in economic exposure.

Given the modest size and stated purpose of the disposition, the filing is unlikely to materially affect Ambarella’s investment thesis or signal a strategic shift by management.

Leslie Kohn, Chief Technology Officer and Director of Ambarella (AMBA), reported a sale of 1,715 ordinary shares on June 17, 2025, at a price of $52.26 per share. The transaction was specifically executed to cover tax obligations arising from the vesting of restricted stock units.

Following the reported transaction, Kohn maintains direct beneficial ownership of 979,677 shares of Ambarella. This Form 4 filing indicates the executive continues to hold a significant equity position in the company despite the tax-related sale.

• Transaction was executed under tax obligation requirements, not discretionary selling
• Kohn serves dual roles as both CTO and Director
• Filing was completed through attorney-in-fact Michael Morehead on June 20, 2025
• No derivative securities were involved in this transaction

Ambarella, Inc. (symbol AMBA) has filed a Form 4 detailing a minor insider transaction by Senior Vice President, Systems, Chi-Hong Ju. On 06/17/2025 the executive sold 1,108 ordinary shares of AMBA at $52.26 per share, for gross proceeds of roughly $57.9 thousand. A single explanatory note states the shares were sold strictly to cover tax withholding obligations associated with the vesting of restricted stock units (RSUs).

After completing the sale, Mr. Ju still directly owns 171,032 ordinary shares and indirectly holds 8,000 additional shares through a foundation, leaving more than 99 % of his prior direct stake intact. The filing shows no derivative security activity and no indication that the trade occurred under a Rule 10b5-1 plan.

The sale represents less than 1 % of Mr. Ju’s direct holdings and appears routine. No operational, strategic, or earnings-related information is provided in this document, and there are no indications of broader insider sentiment shifts.

Ambarella, Inc. (AMBA) – Form 4 insider transaction

CEO and Director Feng-Ming Wang reported a sale of 4,677 ordinary shares on 06/17/2025, coded “S” for disposal. The shares were sold at $52.26 each, implying proceeds of roughly $0.24 million. The filing notes that the shares were "sold to pay tax obligations resulting from the vesting of restricted stock units", indicating a routine tax-withholding sale rather than a discretionary liquidation.

Following the transaction, Wang’s direct ownership stands at 793,634 shares, meaning the sale reduced his stake by less than 1%. No derivative transactions or additional equity awards were reported in Table II. The filing was signed by an attorney-in-fact on 06/20/2025 and reflects a single-person filing.

From an investment-impact standpoint, the transaction is small relative to Wang’s remaining holdings and does not, by itself, signal a strategic shift or fundamental change at Ambarella. Nevertheless, investors often monitor Form 4 filings for sentiment cues; repeated or larger-scale sales could draw more attention, but this isolated, tax-related sale is likely immaterial to the company’s valuation.