Every Form 4 that Ambarella, Inc. (AMBA) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AMBA and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AMBA filings page.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. Hu Chenming reported acquisition or exercise transactions in this Form 4 filing.
AMBARELLA INC (AMBA) reported that director Chenming Hu received an annual equity award in the form of 3,151 Ordinary Shares as a restricted stock unit (RSU) grant effective September 8, 2026. Following this grant, Hu directly holds 32,667 Ordinary Shares.
The RSU award vests in four equal installments every three months starting from a vesting start date of September 15, 2026, becoming fully vested on September 15, 2027, subject to Hu’s continued service with the company.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. Bryant Gregory M reported acquisition or exercise transactions in this Form 4 filing.
Ambarella Inc. (AMBA) reported that director Gregory M. Bryant received an annual equity award in the form of 3,151 Ordinary Shares on September 8, 2026. The restricted stock unit grant vests in four equal installments every three months from September 15, 2026, becoming fully vested on September 15, 2027, subject to his continued service. Following this award, he holds 5,608 Ordinary Shares directly.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. Breithaupt Chantelle Yvette reported acquisition or exercise transactions in this Form 4 filing.
AMBARELLA INC (AMBA) reported that director Chantelle Yvette Breithaupt received an annual equity award on September 8, 2026, consisting of 3,151 Ordinary Shares in the form of a restricted stock unit grant approved by the Board of Directors.
The RSU grant vests as to 1/4 of the shares every three months after the vesting start date of September 15, 2026, becoming 100% vested on September 15, 2027, subject to her continued service with the company. Following this award, she holds 8,091 Ordinary Shares directly. No Rule 10b5-1 trading plan is reported for this grant.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. Schwarting Elizabeth M reported acquisition or exercise transactions in this Form 4 filing.
AMBARELLA INC (AMBA) reported that director Elizabeth M. Schwarting received an annual equity award in the form of 3,151 Ordinary Shares as a restricted stock unit grant effective September 8, 2026. The RSUs vest in four equal quarterly installments starting September 15, 2026 and are scheduled to be fully vested by September 15, 2027, subject to continued service. Following this grant, she holds 9,841 Ordinary Shares directly.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. Hon Hsiao-Wuen reported acquisition or exercise transactions in this Form 4 filing.
AMBARELLA INC (AMBA) reported that director Hon Hsiao-Wuen received an annual grant of 3,151 Ordinary Shares in the form of restricted stock units effective September 8, 2026. These RSUs vest in four equal installments every three months starting September 15, 2026, becoming fully vested on September 15, 2027, subject to continued service. Following this award, the director directly holds 33,927 Ordinary Shares. No Rule 10b5-1 trading plan is reported in connection with this grant.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. RICHARDSON DAVID JEFFREY reported acquisition or exercise transactions in this Form 4 filing.
AMBARELLA INC (AMBA) reported that independent director David Jeffrey Richardson received an annual equity award on September 8, 2026. He was granted 3,151 Ordinary Shares in the form of restricted stock units at no cash cost. The award vests in four equal installments every three months starting September 15, 2026, becoming fully vested on September 15, 2027, subject to his continued service. After this grant he holds 5,649 Ordinary Shares directly, in addition to 25,812 Ordinary Shares held indirectly by a family trust. No Rule 10b5-1 trading plan is reported.
AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. PAISLEY CHRISTOPHER B reported acquisition or exercise transactions in this Form 4 filing.
AMBARELLA INC (AMBA) reported that director Christopher B. Paisley received an annual restricted stock unit (RSU) grant covering 3,151 Ordinary Shares effective September 8, 2026. The award was approved by the Board of Directors for each independent director and is held as a direct ownership position.
The RSUs vest in four equal installments, with 1/4 of the shares vesting every three months starting from the vesting start date of September 15, 2026, and becoming 100% vested on September 15, 2027, subject to Mr. Paisley’s continued service with the company. Following this grant, he directly holds 44,180 Ordinary Shares.
AMBARELLA INC executive Yun-Lung Chen, Vice President of Business Development & Marketing, reported an open-market sale of 5,958 Ordinary Shares on July 9, 2026 at an average price of $78.66 per share. Following this transaction, Chen directly holds 60,557 Ordinary Shares of Ambarella common equity.
Ambarella senior VP Ju Chi-Hong sold 10,000 ordinary shares in an open-market transaction at a weighted average price of $88.84 per share. The filing notes individual sale prices ranged from $88.79 to $88.97 per share. After the sale, Ju holds 155,924 ordinary shares directly and 8,000 ordinary shares indirectly through a foundation.
Ambarella CEO Feng-Ming Wang sold 16,250 ordinary shares in an open-market trade under a pre-arranged Rule 10b5-1 plan. The sale occurred on July 1, 2026 at a weighted average price of about $90.08 per share, with individual trades ranging from $90.00 to $90.50.
Following this transaction, Wang directly owns 773,607 Ambarella ordinary shares. Because the sale was executed pursuant to a previously adopted Rule 10b5-1 trading plan, its timing reflects a scheduled diversification step rather than a newly timed market decision.
Ambarella Inc. director Christopher B. Paisley sold 250 Ordinary Shares in an open-market trade at $62.01 per share. The sale was made under a pre-arranged Rule 10b5-1 trading plan adopted on September 22, 2025, and he continues to hold 41,029 shares directly.
Ambarella CFO John Alexander Young reported open-market sales of 5,033 ordinary shares. The trades on June 17, 2026 were executed at prices of $66.98 and $67.87 per share.
According to the disclosure, the shares were sold to cover tax obligations arising from the vesting of restricted stock units and were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on January 15, 2026, indicating a routine, pre-planned transaction rather than a discretionary sale.
Ambarella Inc. Chief Operations Officer W. Chan Lee reported an open-market sale of Ordinary Shares primarily to cover tax obligations from vesting restricted stock units. Lee sold 2,951 shares at an average price of $67.87 per share and continues to hold 157,098 shares directly after the transaction.
Ambarella Senior VP Ju Chi-Hong reported an open-market sale of 2,017 Ordinary Shares at $67.87 per share on June 17, 2026. According to the footnote, the shares were sold to pay tax obligations arising from the vesting of restricted stock units, making this a routine, tax-related transaction. After the sale, Ju held 165,924 Ordinary Shares directly, and the report also shows 8,000 Ordinary Shares held indirectly through a foundation.
Ambarella CEO Feng-Ming Wang reported two share transactions involving Ordinary Shares. He made a bona fide gift of 10,000 shares to a charitable donor advised fund and sold 6,204 shares at $67.87 per share to cover tax obligations from restricted stock unit vesting. After these moves, he continues to hold 789,857 Ordinary Shares directly.
Ambarella Inc. vice president of business development Yun-Lung Chen conducted an open-market sale of 9,856 Ordinary Shares. The shares were sold at a weighted average price of $67.06 per share, within a range of $67.06 to $67.07. Following this transaction, Chen directly holds 66,515 Ordinary Shares of Ambarella.
Ambarella Inc CFO John Alexander Young reported a small, routine option exercise and share sale. On 2026-05-26, he exercised options for 400 Ordinary Shares at an exercise price of $55.80 per share and sold 400 Ordinary Shares in an open-market transaction at $96.00 per share. The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on January 15, 2026, indicating the timing was set in advance. After these transactions, he directly holds 117,623 Ordinary Shares and 24,600 Non-Qualified Stock Options, showing he retains a substantial equity position.
AMBARELLA INC CEO Feng-Ming Wang reported open-market sales of a total of 32,500 Ordinary Shares on May 26, 2026. The transactions were executed in three tranches at reported prices of $92.0487, $91.2294, and $90.3791 per share, within price ranges from $90.00 to $92.50. These sales were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on October 8, 2025, and Wang held 806,061 shares directly after the transactions.
Ambarella Inc's CFO John Alexander Young sold 1,971 Ordinary Shares in an open-market transaction at $60.00 per share. After this sale, he directly holds 117,623 Ordinary Shares. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan adopted on January 15, 2026, indicating it was scheduled in advance rather than timed discretionarily.
Ambarella CFO John Alexander Young reported several equity transactions involving the company’s Ordinary Shares. On March 18, 2026, he received 5,560 fully vested restricted stock units as payment of his Fiscal Year 2026 annual bonus, each convertible into one Ordinary Share.
On March 17, 2026, a performance-based RSU award granted in April 2023 vested at 100% of its target, leading to the conversion of 3,556 Performance Stock Units into Ordinary Shares. That same day, he sold 4,577 Ordinary Shares at $52.77 per share to cover tax obligations from RSU vesting.
On March 19, 2026, he executed an additional open-market sale of 3,038 Ordinary Shares at $54.14 per share. After these transactions, he directly owns 119,594 Ordinary Shares, including 154 shares acquired under the company’s employee stock purchase plan.
Chen Yun-Lung reported acquisition or exercise transactions in this Form 4 filing.
Ambarella Inc. VP Yun-Lung Chen reported equity awards and a performance-based vesting, with no open-market buying or selling. Chen received 2,849 fully vested restricted stock units as payment of his annual bonus under Ambarella’s Fiscal Year 2026 Annual Bonus Plan.
A separate performance-based RSU award granted on April 3, 2023 vested into 4,651 Ordinary Shares after the company’s total stockholder return and revenue growth from February 1, 2023 through January 31, 2026 met the target level, resulting in 100% of the target RSU number vesting. Following these transactions, Chen directly holds 76,371 Ordinary Shares.
Ambarella Inc. Chief Operations Officer W. Chan Lee reported several equity compensation-related moves. On March 17, 2026, performance stock units for 13,678 Ordinary Shares vested at 100% of the target level and were converted into shares, with 6,729 of those shares sold at $52.77 each to cover tax obligations. On March 18, 2026, Lee received a fully vested award of 7,320 restricted stock units as payment of the fiscal 2026 annual bonus. On March 19, 2026, Lee sold 3,641 Ordinary Shares in an open-market transaction at $54.14 per share. After these transactions, Lee directly held 160,049 Ordinary Shares, including 154 shares acquired under the employee stock purchase plan.
Ambarella Inc. executive Ju Chi-Hong reported a mix of stock awards, vesting, and modest share sales. On March 17, 2026, performance stock units covering 9,553 Ordinary Shares vested at 100% of the target level based on total stockholder return and revenue growth over a specified period, and were converted into Ordinary Shares. That same day, 4,729 Ordinary Shares were sold at $52.77 per share, with a footnote stating shares were sold to pay tax obligations from restricted stock unit vesting. On March 18, 2026, he received 5,930 fully vested restricted stock units as payment of his Fiscal Year 2026 annual bonus, each representing one Ordinary Share. On March 19, 2026, he sold 2,155 Ordinary Shares at $54.14 per share in open-market transactions. Following these transactions, Ju Chi-Hong holds 167,941 Ordinary Shares directly and 8,000 shares indirectly through a foundation, indicating the sales represent a small portion of his overall position.
Ambarella CEO Feng-Ming Wang reported a mix of equity award activity and share sales. On March 17, 2026, he exercised 27,598 Performance Stock Units, receiving the same number of Ordinary Shares, then sold 18,976 Ordinary Shares at $52.77 per share. A footnote explains these shares were sold to cover tax obligations from restricted stock unit vesting.
On March 18, 2026, he received a fully vested bonus award of 15,686 restricted stock units, each convertible into one Ordinary Share. On March 19, 2026, he sold an additional 8,083 Ordinary Shares at $54.14 per share in an open-market transaction. Following these transactions, Wang directly holds 838,561 Ordinary Shares.
Young John Alexander reported acquisition or exercise transactions in this Form 4 filing.
Ambarella CFO John Alexander Young reported equity awards tied to company performance and service. He was granted 15,201 Performance Stock Units at a stated price of $0.00 per unit, and his direct holdings of Ordinary Shares increased by 15,201 shares to a total of 117,939 shares.
Footnotes explain that one award of restricted stock units vests at a rate of 1/12 per quarter starting on March 15, 2026, with each unit representing one ordinary share. A separate performance-based RSU grant is scheduled to vest on March 15, 2029, with the final number of shares adjustable between 0% and 150% of the target amount based on total shareholder return and revenue growth from February 1, 2026 through January 31, 2029, subject to continued service.
Chen Yun-Lung reported acquisition or exercise transactions in this Form 4 filing.
Ambarella Inc executive Yun-Lung Chen, VP of Business Development, reported an equity award made on March 2, 2026. He received 7,220 performance stock units and a corresponding grant of 7,220 ordinary shares at a price of $0.00 per share, bringing his direct holdings to 68,871 ordinary shares.
The restricted stock units vest at a rate of 1/12 per quarter starting March 15, 2026, while the performance-based RSUs are scheduled to vest on March 15, 2029, subject to continued service. The number of shares ultimately earned can range from 0% to 150% of the target amount, based on Ambarella’s total shareholder return and revenue growth from February 1, 2026 through January 31, 2029.
Lee Chan W reported acquisition or exercise transactions in this Form 4 filing.
Ambarella, Inc. reported that Chief Operations Officer Lee Chan W received equity awards on March 2, 2026. He was granted 24,701 performance stock units and a related right to receive 24,701 ordinary shares at no cost, subject to vesting and performance conditions.
The restricted stock units vest at a rate of 1/12 per quarter starting on March 15, 2026, with each unit representing one ordinary share. A separate performance-based RSU award is scheduled to vest on March 15, 2029, and the actual shares earned may range from 0% to 150% of the target amount based on Ambarella’s total shareholder return and revenue growth between February 1, 2026 and January 31, 2029.
Ambarella Inc. executive Ju Chi-Hong reported new equity awards. On March 2, 2026, he acquired 17,329 Performance Stock Units at a stated price of $0.00 per unit, increasing his derivative holdings of these awards to 17,329 units.
He also acquired 17,329 Ordinary Shares at $0.00 per share, bringing his directly held Ordinary Shares to 159,188. An additional 8,000 Ordinary Shares are held indirectly by a foundation. Footnotes state that one RSU award vests 1/12 per quarter starting March 15, 2026, while a performance-based RSU grant is scheduled to vest on March 15, 2029, with the final share count adjustable between 0% and 150% of a target number based on total shareholder return and revenue growth from February 1, 2026 through January 31, 2029.
Ambarella, Inc. director and CEO Feng-Ming Wang reported multiple equity transactions on March 2, 2026. He exercised a non-qualified stock option for 50,000 Ordinary Shares at $41.36 per share and then sold a total of 50,000 Ordinary Shares in several open-market trades under a Rule 10b5-1 trading plan, at weighted average prices ranging from about $56.79 to $62.2199 per share. He also received a grant of 53,203 Performance Stock Units and a matching 53,203-share Ordinary Share award that vest over time and are tied to the company’s total shareholder return and revenue growth from February 1, 2026 through January 31, 2029. Following these transactions, Wang directly owned 822,182 Ordinary Shares.
Ambarella Inc director Gregory M. Bryant received an equity award linked to 2,457 ordinary shares as a grant or other acquisition. According to the terms, these restricted stock units will vest in three equal installments on March 15, 2026, June 15, 2026, and September 15, 2026, becoming fully vested by September 15, 2026.
Ambarella Inc. insider activity: Senior VP, Systems & Asia, Chi-Hong Ju reported selling 7,945 ordinary shares of Ambarella on 12/30/2025. The sale price reported is a weighted average of $70.25 per share, with individual sale prices ranging from $70.19 to $70.43 per share. After this transaction, Ju beneficially owns 149,587 ordinary shares, held directly.
The filing notes that full details of the number of shares sold at each separate price within the stated range are available upon request to the company, the SEC staff, or any Ambarella security holder.
Ambarella Inc. executive Chi-Hong Ju reported an open‑market sale of company stock. On January 5, 2026, the Senior VP, Systems & GM, Asia sold 7,728 ordinary shares at a weighted average price of $75.583 per share, with individual sale prices ranging from $75.29 to $76.02.
After this transaction, Ju beneficially owns 146,039 ordinary shares directly and an additional 8,000 ordinary shares indirectly held by a foundation. The filing notes that detailed price breakdowns within the reported range are available upon request.
Ambarella, Inc. insider transaction: Chi-Hong Ju, Senior VP, Systems & GM, Asia, reported selling 3,765 ordinary shares of Ambarella Inc. on 12/30/2025. The sale, coded as an "S" transaction, was executed at a weighted average price of $70.32 per share, with individual trades occurring in a price range from $70.24 to $70.43 per share. After this sale, the reporting person beneficially owns 153,767 ordinary shares directly.
In addition, the filing shows 8,000 ordinary shares held indirectly by a foundation. The reporter has indicated willingness to provide detailed breakdowns of the number of shares sold at each price within the disclosed range to the Commission staff, the issuer, or any security holder upon request.
Ambarella Inc. director reports small share sale
A director of Ambarella Inc., Elizabeth M. Schwarting, reported selling 624 ordinary shares of the company on 12/16/2025. The sale was reported at a price of $72.3771 per share. After this transaction, she directly beneficially owns 6,690 Ambarella shares. The filing is made on behalf of one reporting person and reflects a routine insider transaction by a company director.
Ambarella Inc. director reports share transfer to family trust
A director of Ambarella Inc. reported an internal transfer of 2,531 ordinary shares on 12/15/2025 using transaction code G, which indicates a gift or similar transfer. The filing shows 2,531 shares disposed of at a stated price of $0.0 from the director’s direct holdings and the same 2,531 shares acquired by a family trust. After the transaction, the director holds 2,498 ordinary shares directly and 25,812 ordinary shares indirectly through the family trust. The director states that beneficial ownership of the trust shares is disclaimed except to the extent of any pecuniary interest.
Ambarella (AMBA): Insider transaction disclosed. Senior VP, Systems & GM, Asia, Chi-Hong Ju reported open‑market sales of company stock on two dates. He sold 5,057 shares at $81.2919 on 10/13/2025 and 6,156 shares at $80.96 on 10/14/2025. Following these transactions, he beneficially owned 158,874 shares directly. He also reports 8,000 shares held indirectly by a foundation.
Elizabeth M. Schwarting, a director of Ambarella Inc. (AMBA), reported a sale of 2,664 ordinary shares on 10/06/2025 at a weighted average price of $85.3772 per share (range $85.25 to $85.38). After the transaction she beneficially owned 7,314 shares, held directly. The Form 4 was filed indicating the sale was executed on 10/06/2025 and the filing was signed by an attorney‑in‑fact on 10/08/2025. The filing does not state a 10b5‑1 plan or provide reasons for the sale.
John A. Young, who serves as an officer and director at Ambarella, reported a small sale and updated holdings. He disposed of 2,566 ordinary shares on 09/17/2025 at a price of $79.43 per share; the filing explains those shares were sold to pay tax obligations arising from the vesting of restricted stock units. After that transaction and recent activity, he beneficially owns 109,108 ordinary shares, which the filer notes includes 223 shares acquired under the company’s employee stock purchase plan on 09/15/2025. The Form 4 was signed by an attorney-in-fact on behalf of Mr. Young.
Chan W. Lee, Chief Operating Officer of Ambarella, reported a sale of 1,947 ordinary shares on 09/17/2025 at a price of $79.43 per share to cover tax obligations arising from the vesting of restricted stock units. After the sale, Mr. Lee beneficially owns 126,972 shares, which includes 223 shares acquired under the company's employee stock purchase plan on 09/15/2025. The Form 4 was filed as a single reporting person filing and bears a signature by an attorney-in-fact on 09/19/2025.
Leslie Kohn, Chief Technology Officer and director of Ambarella, reported a small sale of company stock on 09/17/2025. The filing shows 2,249 ordinary shares were sold at $79.43 per share under transaction code S, with the stated purpose that the shares were sold to pay tax obligations arising from restricted stock unit vesting.
After the sale, the filing reports 977,428 shares beneficially owned by Kohn. The transaction appears routine and limited in size relative to the reported holdings.
Chi-Hong Ju, Senior Vice President, Systems at Ambarella Inc (AMBA), reported a sale of 1,168 ordinary shares on 09/17/2025 at a price of $79.43 per share to cover tax obligations arising from the vesting of restricted stock units. After the transaction Mr. Ju directly beneficially owns 170,087 ordinary shares and indirectly holds 8,000 shares through a foundation. The filing also notes Mr. Ju acquired 223 shares under the company’s employee stock purchase plan on 09/15/2025. The Form 4 was signed by an attorney-in-fact on behalf of Mr. Ju on 09/19/2025.
Filing snapshot: AMBARELLA INC director and CEO Feng-Ming Wang reported a sale of 4,928 ordinary shares on 09/17/2025 at $79.43 per share. The filing states the sale was to pay tax obligations arising from the vesting of restricted stock units. After the transaction, Mr. Wang beneficially owned 788,929 shares, which the filing notes includes 223 shares purchased under the companys employee stock purchase plan on 09/15/2025.