Lee Chan W 4

4 · AMBARELLA INC · Filed Mar 19, 2026

AI-generated summary of this filing

Updated Mar 19, 2026

Ambarella (AMBA) COO Lee Chan W Sells Shares, Exercises RSUs

What Happened

Lee Chan W, Chief Operations Officer of Ambarella (AMBA), completed a mix of transactions around the March 17–19, 2026 period: he exercised/converted 13,678 derivative awards (performance-based RSUs that vested), was granted 7,320 fully‑vested RSUs as his FY2026 bonus, and sold a total of 10,370 shares in open-market transactions to cover tax obligations. The two sales were 6,729 shares at $52.77 (proceeds $355,089) on March 17 and 3,641 shares at $54.14 (proceeds $197,124) on March 19, totaling $552,213 in gross sale proceeds. The reporting also notes 154 shares acquired under the company ESPP.

Key Details

Transaction dates and prices:
- 2026-03-17: Exercised/converted 13,678 derivative shares (M).
- 2026-03-17: Sold 6,729 shares @ $52.77 — $355,089.
- 2026-03-18: Awarded 7,320 RSUs (grant as annual bonus) — $0 cash outlay.
- 2026-03-19: Sold 3,641 shares @ $54.14 — $197,124.
- ESPP: 154 shares acquired March 16, 2026 (included in holdings).
Total open‑market sale proceeds: $552,213.
Shares sold were identified as sold to pay tax obligations from vested RSUs (footnote F3).
Footnotes of note:
- F1/F4: RSUs represent contingent rights to one share each; F4 relates to the FY2026 annual bonus award (7,320 RSUs).
- F5: A performance-based RSU granted in April 2023 vested at 100% of target on March 15, 2026 (resulting in the 13,678 conversion).
- F2: 154 ESPP shares acquired March 16, 2026.
Filing: Reported on 2026-03-19 for transactions on/around 2026-03-17–19; filing appears within the standard Form 4 reporting window (not flagged late).

Context

The filings show conversions/vestings (exercise/conversion of RSUs) and an RSU bonus grant — these are acquisitions of shares via compensation, not open‑market purchases. Some of the newly acquired shares were then sold to cover withholding/tax obligations (a common practice on vesting).
The derivative (M) entries reflect vested performance RSUs converting to shares; the simultaneous sales indicate a cashless-like outcome to satisfy taxes rather than a straightforward investment purchase.

Form 4

Period: 2026-03-17

Chief Operations Officer

Transactions

Exercise/Conversion
Ordinary Shares
[F1][F2]
2026-03-17+13,678→ 163,099 total
Sale
Ordinary Shares
[F3]
2026-03-17$52.77/sh−6,729$355,089→ 156,370 total
Award
Ordinary Shares
[F4]
2026-03-18+7,320→ 163,690 total
Sale
Ordinary Shares
[F3]
2026-03-19$54.14/sh−3,641$197,124→ 160,049 total
Exercise/Conversion
Performance Stock Units
[F1][F5]
2026-03-17−13,678→ 0 total
Exp: 2026-03-15→ Ordinary Shares (13,678 underlying)

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: Chan W. Lee|2026-03-19

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