Ju Chi-Hong 4

4 · AMBARELLA INC · Filed Mar 19, 2026

AI-generated summary of this filing

Updated Mar 19, 2026

Ambarella (AMBA) SVP Ju Chi‑Hong Sells Shares & Exercises Options

What Happened

Ju Chi‑Hong, Senior Vice President, Systems & GM, Asia at Ambarella (AMBA), exercised/converted a derivative for 9,553 shares (reported 2026-03-17) and sold a total of 6,884 shares in open-market transactions (4,729 shares on 2026-03-17 and 2,155 shares on 2026-03-19) for combined proceeds of $366,221. The filing also shows a grant of 5,930 restricted stock units (RSUs) on 2026-03-18 issued as payment of his FY2026 annual bonus; those RSUs represent contingent rights to one share each.

Key Details

Transactions and prices:
- 2026-03-17: Exercise/conversion of derivative — 9,553 shares (acquired; reported price N/A).
- 2026-03-17: Open-market sale — 4,729 shares @ $52.77 = $249,549.
- 2026-03-18: Grant/award — 5,930 RSUs @ $0.00 (annual bonus; each RSU = 1 share).
- 2026-03-19: Open-market sale — 2,155 shares @ $54.14 = $116,672.
- Filing also notes 9,553-share derivative disposition line (reported at $0.00) and 154 shares acquired via the company's ESPP on 2026-03-16.
Total reported sale proceeds: $366,221.
Shares owned after the transactions: not specified in the provided excerpt of the filing.
Notable footnotes:
- F3: Shares sold were used to pay tax obligations from RSU vesting.
- F4: 5,930 RSUs were issued as the reporting person’s fully‑vested FY2026 bonus.
- F5: A prior performance-based RSU grant vested at 100% based on company performance for the performance period.
Filing timeliness: Reported on 2026-03-19 for transactions through 2026-03-19; filing appears timely (no late filing indicated).

Context

The filing indicates the sale of shares was used, at least in part, to satisfy tax withholding obligations arising from RSU vesting — a routine administrative reason for insider sales. The exercise/conversion of a derivative (M code) reflects option or similar instrument settlement; a corresponding derivative disposition line appears in the filing. These actions do not, by themselves, indicate management sentiment about the stock; they commonly reflect bonus compensation, vesting events, and tax-related sales.

Form 4

Period: 2026-03-17

Senior VP, Systems & GM, Asia

Transactions

Exercise/Conversion
Ordinary Shares
[F1][F2]
2026-03-17+9,553→ 168,895 total
Sale
Ordinary Shares
[F3]
2026-03-17$52.77/sh−4,729$249,549→ 164,166 total
Award
Ordinary Shares
[F4]
2026-03-18+5,930→ 170,096 total
Sale
Ordinary Shares
[F3]
2026-03-19$54.14/sh−2,155$116,672→ 167,941 total
Exercise/Conversion
Performance Stock Units
[F1][F5]
2026-03-17−9,553→ 0 total
Exp: 2026-03-15→ Ordinary Shares (9,553 underlying)

Holdings

Footnotes (5)

[F1]Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.
[F2]Includes 154 shares acquired under the Company's employee stock purchase plan on March 16, 2026.
[F3]Shares sold to pay tax obligations resulting from the vesting of restricted stock units.
[F4]Represents an award of fully-vested restricted stock units (RSUs) issued to reporting person as payment of reporting person's annual bonus under the company's previously established Fiscal Year 2026 Annual Bonus Plan. Each restricted stock unit represents a contingent right to receive one Ordinary Share.
[F5]On April 3, 2023, reporting person was granted a performance-based RSU award covering a target number of ordinary shares (the "Target RSU Number"). Pursuant to time-based vesting requirements, the award would vest in full on March 15, 2026. In addition, the number of shares subject to the award could be decreased by up to 100% or increased by up to 150% of the Target RSU Number, based on attainment of specified levels of the Company's total stockholder return and revenue growth over the period of February 1, 2023 through January 31, 2026 (the "TSR Period"). As a result of the Company's performance over the TSR Period, the number of shares that vested was 100% of the Target RSU Number.

Signature

By: /s/ Michael Morehead, Attorney-in-Fact For: Chi-Hong Ju|2026-03-19

1 file