Follow the people · Insider
Chi-Hong Ju
Chi-Hong Ju files insider transactions with the SEC as a senior vp, systems & gm of Ambarella (AMBA). We hold 6 disclosed purchases and sales filed since 17 September 2021, 2 of them in the last 90 days.
- Files forAMBA
- Disclosed buys and sells6 in all, 2 in the last 90 days
- Last disclosure2 July 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 16 September 2021 — 1 July 2026Senior VP, Systems & GM · Ambarella (AMBA)105 Form 4 lines · source: SEC Form 4
Everything they disclosed
105 entries, newest first — one per disclosure report, one per Form 4 line- ▼ sold on the open market 10,000 shares of AmbarellaSEC Form 42 July 2026Ordinary Shares · traded 1 July 2026 · filed 2 July 2026
- ▼ sold on the open market 2,017 shares of AmbarellaSEC Form 418 June 2026Ordinary Shares · traded 17 June 2026 · filed 18 June 2026
- exercised options over 9,553 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 17 March 2026 · filed 19 March 2026
- ▼ sold on the open market 4,729 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 17 March 2026 · filed 19 March 2026
- was granted 5,930 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 18 March 2026 · filed 19 March 2026
- exercised options over 9,553 shares of Ambarella (a derivative holding)SEC Form 419 March 2026Performance Stock Units · traded 17 March 2026 · filed 19 March 2026
- ▼ sold on the open market 2,155 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 19 March 2026 · filed 19 March 2026
- exercised options over 9,553 shares of Ambarella (a derivative holding)SEC Form 419 March 2026Performance Stock Units · traded 17 March 2026 · filed 19 March 2026
- exercised options over 9,553 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 17 March 2026 · filed 19 March 2026
- ▼ sold on the open market 4,729 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 17 March 2026 · filed 19 March 2026
- was granted 5,930 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 18 March 2026 · filed 19 March 2026
- ▼ sold on the open market 2,155 shares of AmbarellaSEC Form 419 March 2026Ordinary Shares · traded 19 March 2026 · filed 19 March 2026
- was granted 17,329 shares of AmbarellaSEC Form 44 March 2026Ordinary Shares · traded 2 March 2026 · filed 4 March 2026
- was granted 17,329 shares of Ambarella (a derivative holding)SEC Form 44 March 2026Performance Stock Units · traded 2 March 2026 · filed 4 March 2026
- was granted 17,329 shares of Ambarella (a derivative holding)SEC Form 44 March 2026Performance Stock Units · traded 2 March 2026 · filed 4 March 2026
- was granted 17,329 shares of AmbarellaSEC Form 44 March 2026Ordinary Shares · traded 2 March 2026 · filed 4 March 2026
- ▼ sold on the open market 7,945 shares of AmbarellaSEC Form 423 January 2026Ordinary Shares · traded 30 December 2025 · filed 23 January 2026
- ▼ sold on the open market 7,945 shares of AmbarellaSEC Form 423 January 2026Ordinary Shares · traded 30 December 2025 · filed 23 January 2026
- ▼ sold on the open market 7,728 shares of AmbarellaSEC Form 47 January 2026Ordinary Shares · traded 5 January 2026 · filed 7 January 2026
- ▼ sold on the open market 7,728 shares of AmbarellaSEC Form 47 January 2026Ordinary Shares · traded 5 January 2026 · filed 7 January 2026
- ▼ sold on the open market 3,765 shares of AmbarellaSEC Form 431 December 2025Ordinary Shares · traded 30 December 2025 · filed 31 December 2025
- ▼ sold on the open market 1,342 shares of AmbarellaSEC Form 419 December 2025Ordinary Shares · traded 17 December 2025 · filed 19 December 2025
- ▼ sold on the open market 5,057 shares of AmbarellaSEC Form 415 October 2025Ordinary Shares · traded 13 October 2025 · filed 15 October 2025
- ▼ sold on the open market 6,156 shares of AmbarellaSEC Form 415 October 2025Ordinary Shares · traded 14 October 2025 · filed 15 October 2025
- ▼ sold on the open market 1,168 shares of AmbarellaSEC Form 419 September 2025Ordinary Shares · traded 17 September 2025 · filed 19 September 2025
- ▼ sold on the open market 1,108 shares of AmbarellaSEC Form 420 June 2025Ordinary Shares · traded 17 June 2025 · filed 20 June 2025
- ▼ sold on the open market 1,034 shares of AmbarellaSEC Form 420 March 2025Ordinary Shares · traded 18 March 2025 · filed 20 March 2025
- was granted 12,388 shares of Ambarella (a derivative holding)SEC Form 47 March 2025Performance Stock Units · traded 28 February 2025 · filed 7 March 2025
- was granted 12,388 shares of AmbarellaSEC Form 47 March 2025Ordinary Shares · traded 28 February 2025 · filed 7 March 2025
- was granted 4,773 shares of AmbarellaSEC Form 47 March 2025Ordinary Shares · traded 5 March 2025 · filed 7 March 2025
- ▼ sold on the open market 1,859 shares of AmbarellaSEC Form 47 March 2025Ordinary Shares · traded 6 March 2025 · filed 7 March 2025
- ▼ sold on the open market 1,048 shares of AmbarellaSEC Form 418 December 2024Ordinary Shares · traded 16 December 2024 · filed 18 December 2024
- gave away 593 shares of AmbarellaSEC Form 410 December 2024Ordinary Shares · traded 9 December 2024 · filed 10 December 2024
- ▼ sold on the open market 2,118 shares of AmbarellaSEC Form 410 December 2024Ordinary Shares · traded 9 December 2024 · filed 10 December 2024
- ▼ sold on the open market 3,000 shares of AmbarellaSEC Form 410 December 2024Ordinary Shares · traded 9 December 2024 · filed 10 December 2024
- gave away 5,000 shares of AmbarellaSEC Form 46 December 2024Ordinary Shares · traded 4 December 2024 · filed 6 December 2024
- gave away 5,000 shares of AmbarellaSEC Form 46 December 2024Ordinary Shares · traded 4 December 2024 · filed 6 December 2024
- ▼ sold on the open market 1,050 shares of AmbarellaSEC Form 419 September 2024Ordinary Shares · traded 17 September 2024 · filed 19 September 2024
- ▼ sold on the open market 6,000 shares of AmbarellaSEC Form 427 June 2024Ordinary Shares · traded 26 June 2024 · filed 27 June 2024
- exercised options over 8,900 shares of Ambarella (a derivative holding)SEC Form 424 June 2024Non-Qualified Stock Option (right to buy) · traded 21 June 2024 · filed 24 June 2024
- exercised options over 8,900 shares of AmbarellaSEC Form 424 June 2024Ordinary Shares · traded 21 June 2024 · filed 24 June 2024
- ▼ sold on the open market 8,900 shares of AmbarellaSEC Form 424 June 2024Ordinary Shares · traded 21 June 2024 · filed 24 June 2024
- ▼ sold on the open market 1,059 shares of AmbarellaSEC Form 420 June 2024Ordinary Shares · traded 18 June 2024 · filed 20 June 2024
- ▼ sold on the open market 2,296 shares of AmbarellaSEC Form 411 June 2024Ordinary Shares · traded 7 June 2024 · filed 11 June 2024
- ▼ sold on the open market 1,895 shares of AmbarellaSEC Form 411 June 2024Ordinary Shares · traded 10 June 2024 · filed 11 June 2024
- ▼ sold on the open market 778 shares of AmbarellaSEC Form 420 March 2024Ordinary Shares · traded 18 March 2024 · filed 20 March 2024
- was granted 1,224 shares of AmbarellaSEC Form 411 March 2024Ordinary Shares · traded 7 March 2024 · filed 11 March 2024
- ▼ sold on the open market 509 shares of AmbarellaSEC Form 411 March 2024Ordinary Shares · traded 8 March 2024 · filed 11 March 2024
- was granted 15,898 shares of Ambarella (a derivative holding)SEC Form 44 March 2024Performance Stock Units · traded 29 February 2024 · filed 4 March 2024
- was granted 15,898 shares of AmbarellaSEC Form 44 March 2024Ordinary Shares · traded 29 February 2024 · filed 4 March 2024
- ▼ sold on the open market 1,074 shares of AmbarellaSEC Form 421 December 2023Ordinary Shares · traded 19 December 2023 · filed 21 December 2023
- ▼ sold on the open market 1,048 shares of AmbarellaSEC Form 420 September 2023Ordinary Shares · traded 18 September 2023 · filed 20 September 2023
- ▼ sold on the open market 4,251 shares of AmbarellaSEC Form 410 July 2023Ordinary Shares · traded 7 July 2023 · filed 10 July 2023
- was granted 17,814 shares of AmbarellaSEC Form 420 June 2023Ordinary Shares · traded 15 June 2023 · filed 20 June 2023
- ▼ sold on the open market 1,015 shares of AmbarellaSEC Form 420 June 2023Ordinary Shares · traded 20 June 2023 · filed 20 June 2023
- ▼ sold on the open market 4,165 shares of AmbarellaSEC Form 49 June 2023Ordinary Shares · traded 8 June 2023 · filed 9 June 2023
- was granted 9,553 shares of Ambarella (a derivative holding)SEC Form 45 April 2023Performance Stock Units · traded 3 April 2023 · filed 5 April 2023
- exercised options over 14,338 shares of Ambarella (a derivative holding)SEC Form 417 March 2023Performance Stock Units · traded 15 March 2023 · filed 17 March 2023
- exercised options over 1,195 shares of Ambarella (a derivative holding)SEC Form 417 March 2023Restricted Stock Units · traded 15 March 2023 · filed 17 March 2023
- exercised options over 513 shares of Ambarella (a derivative holding)SEC Form 417 March 2023Restricted Stock Units · traded 15 March 2023 · filed 17 March 2023
- exercised options over 775 shares of Ambarella (a derivative holding)SEC Form 417 March 2023Restricted Stock Units · traded 15 March 2023 · filed 17 March 2023
- exercised options over 12,488 shares of AmbarellaSEC Form 417 March 2023Ordinary Shares · traded 15 March 2023 · filed 17 March 2023
- ▼ sold on the open market 4,402 shares of AmbarellaSEC Form 417 March 2023Ordinary Shares · traded 17 March 2023 · filed 17 March 2023
- was granted 9,553 shares of Ambarella (a derivative holding)SEC Form 46 March 2023Restricted Stock Units · traded 2 March 2023 · filed 6 March 2023
- ▼ sold on the open market 2,000 shares of AmbarellaSEC Form 422 December 2022Ordinary Shares · traded 22 December 2022 · filed 22 December 2022
- exercised options over 1,195 shares of Ambarella (a derivative holding)SEC Form 420 December 2022Restricted Stock Units · traded 16 December 2022 · filed 20 December 2022
- exercised options over 514 shares of Ambarella (a derivative holding)SEC Form 420 December 2022Restricted Stock Units · traded 16 December 2022 · filed 20 December 2022
- exercised options over 776 shares of Ambarella (a derivative holding)SEC Form 420 December 2022Restricted Stock Units · traded 16 December 2022 · filed 20 December 2022
- exercised options over 2,485 shares of AmbarellaSEC Form 420 December 2022Ordinary Shares · traded 16 December 2022 · filed 20 December 2022
- ▼ sold on the open market 1,262 shares of AmbarellaSEC Form 420 December 2022Ordinary Shares · traded 16 December 2022 · filed 20 December 2022
- ▼ sold on the open market 764 shares of AmbarellaSEC Form 420 December 2022Ordinary Shares · traded 19 December 2022 · filed 20 December 2022
- exercised options over 1,195 shares of Ambarella (a derivative holding)SEC Form 420 September 2022Restricted Stock Units · traded 16 September 2022 · filed 20 September 2022
- exercised options over 514 shares of Ambarella (a derivative holding)SEC Form 420 September 2022Restricted Stock Units · traded 16 September 2022 · filed 20 September 2022
- exercised options over 776 shares of Ambarella (a derivative holding)SEC Form 420 September 2022Restricted Stock Units · traded 16 September 2022 · filed 20 September 2022
- exercised options over 2,485 shares of AmbarellaSEC Form 420 September 2022Ordinary Shares · traded 16 September 2022 · filed 20 September 2022
- ▼ sold on the open market 1,272 shares of AmbarellaSEC Form 420 September 2022Ordinary Shares · traded 16 September 2022 · filed 20 September 2022
- exercised options over 1,195 shares of Ambarella (a derivative holding)SEC Form 417 June 2022Restricted Stock Units · traded 16 June 2022 · filed 17 June 2022
- exercised options over 513 shares of Ambarella (a derivative holding)SEC Form 417 June 2022Restricted Stock Units · traded 16 June 2022 · filed 17 June 2022
- exercised options over 775 shares of Ambarella (a derivative holding)SEC Form 417 June 2022Restricted Stock Units · traded 16 June 2022 · filed 17 June 2022
- exercised options over 2,483 shares of AmbarellaSEC Form 417 June 2022Ordinary Shares · traded 16 June 2022 · filed 17 June 2022
- ▼ sold on the open market 1,340 shares of AmbarellaSEC Form 417 June 2022Ordinary Shares · traded 16 June 2022 · filed 17 June 2022
- was granted 9,308 shares of Ambarella (a derivative holding)SEC Form 419 April 2022Performance Stock Units · traded 11 April 2022 · filed 19 April 2022
- was granted 9,308 shares of Ambarella (a derivative holding)SEC Form 419 April 2022Restricted Stock Units · traded 11 April 2022 · filed 19 April 2022
- exercised options over 14,259 shares of Ambarella (a derivative holding)SEC Form 418 March 2022Performance Stock Units · traded 16 March 2022 · filed 18 March 2022
- exercised options over 1,189 shares of Ambarella (a derivative holding)SEC Form 418 March 2022Restricted Stock Units · traded 16 March 2022 · filed 18 March 2022
- exercised options over 1,195 shares of Ambarella (a derivative holding)SEC Form 418 March 2022Restricted Stock Units · traded 16 March 2022 · filed 18 March 2022
- exercised options over 514 shares of Ambarella (a derivative holding)SEC Form 418 March 2022Restricted Stock Units · traded 16 March 2022 · filed 18 March 2022
- exercised options over 31,416 shares of AmbarellaSEC Form 418 March 2022Ordinary Shares · traded 16 March 2022 · filed 18 March 2022
- ▼ sold on the open market 14,598 shares of AmbarellaSEC Form 418 March 2022Ordinary Shares · traded 16 March 2022 · filed 18 March 2022
- ▼ sold on the open market 1,315 shares of AmbarellaSEC Form 414 March 2022Ordinary Shares · traded 14 March 2022 · filed 14 March 2022
- was granted 3,611 shares of AmbarellaSEC Form 410 March 2022Ordinary Shares · traded 8 March 2022 · filed 10 March 2022
- ▼ sold on the open market 500 shares of AmbarellaSEC Form 45 January 2022Ordinary Shares · traded 7 December 2021 · filed 5 January 2022
- ▼ sold on the open market 500 shares of AmbarellaSEC Form 45 January 2022Ordinary Shares · traded 7 December 2021 · filed 5 January 2022
- ▼ sold on the open market 536 shares of AmbarellaSEC Form 43 January 2022Ordinary Shares · traded 30 December 2021 · filed 3 January 2022
- ▼ sold on the open market 402 shares of AmbarellaSEC Form 428 December 2021Ordinary Shares · traded 27 December 2021 · filed 28 December 2021
- exercised options over 1,188 shares of Ambarella (a derivative holding)SEC Form 417 December 2021Restricted Stock Units · traded 16 December 2021 · filed 17 December 2021
- exercised options over 1,194 shares of Ambarella (a derivative holding)SEC Form 417 December 2021Restricted Stock Units · traded 16 December 2021 · filed 17 December 2021
- exercised options over 513 shares of Ambarella (a derivative holding)SEC Form 417 December 2021Restricted Stock Units · traded 16 December 2021 · filed 17 December 2021
- exercised options over 2,895 shares of AmbarellaSEC Form 417 December 2021Ordinary Shares · traded 16 December 2021 · filed 17 December 2021
- ▼ sold on the open market 1,595 shares of AmbarellaSEC Form 417 December 2021Ordinary Shares · traded 16 December 2021 · filed 17 December 2021
- exercised options over 2,897 shares of AmbarellaSEC Form 47 December 2021Ordinary Shares · traded 3 December 2021 · filed 7 December 2021
- ▼ sold on the open market 1,495 shares of AmbarellaSEC Form 47 December 2021Ordinary Shares · traded 3 December 2021 · filed 7 December 2021
- exercised options over 1,188 shares of Ambarella (a derivative holding)SEC Form 417 September 2021Restricted Stock Units · traded 16 September 2021 · filed 17 September 2021
- exercised options over 1,195 shares of Ambarella (a derivative holding)SEC Form 417 September 2021Restricted Stock Units · traded 16 September 2021 · filed 17 September 2021
- exercised options over 514 shares of Ambarella (a derivative holding)SEC Form 417 September 2021Restricted Stock Units · traded 16 September 2021 · filed 17 September 2021
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.