Young John Alexander 4

4 · AMBARELLA INC · Filed Mar 19, 2026

AI-generated summary of this filing

Updated Mar 19, 2026

Ambarella (AMBA) CFO Young John Alexander Sells Shares, Exercises Options

What Happened

Young John Alexander, Ambarella’s Chief Financial Officer, reported multiple transactions around March 17–19, 2026. He sold a total of 7,615 shares in open-market/private sales (4,577 shares on 3/17 at $52.77 and 3,038 shares on 3/19 at $54.14) for aggregate proceeds of approximately $406,005.
The filing also shows an exercise/conversion of 3,556 derivative units on 3/17 and a contemporaneous derivative disposition (reported at $0), plus a grant/award of 5,560 restricted stock units (RSUs) on 3/18 (reported at $0 since RSUs are contingent rights to shares).

Key Details

Transaction dates and prices:
- 2026-03-17: Sold 4,577 shares @ $52.77 — proceeds $241,528.
- 2026-03-17: Exercised/converted 3,556 derivative units (M code).
- 2026-03-18: Awarded 5,560 RSUs (A code) as annual bonus (no cash paid).
- 2026-03-19: Sold 3,038 shares @ $54.14 — proceeds $164,477.
Total reported sale proceeds: ~$406,005.
Shares owned after the transaction: not specified in the supplied summary (see Form 4 for full holdings).
Notable footnotes:
- F1/F4: Each RSU equals a contingent right to one ordinary share; the 5,560 RSUs were issued as fully-vested RSUs paid as the FY2026 annual bonus.
- F3: Some shares were sold to pay tax obligations from RSU vesting.
- F2: Includes 154 shares acquired under the company ESPP on March 16, 2026.
- F5: A prior performance-based RSU grant vested at 100% of target following the performance period (Feb 1, 2023–Jan 31, 2026).
Filing timeliness: Report filed 2026-03-19 for transactions through 2026-03-17 — appears timely (filed within typical Section 16 reporting window).

Context

The filing shows both sales and awards. Sales appear related in part to tax-withholding obligations from RSU vesting (per footnote F3), a common administrative reason for insider sales that does not necessarily indicate a change in outlook.
The M-code entries indicate conversion/exercise of derivatives (e.g., RSUs or options) into shares; some of those resulting shares were either sold or withheld for taxes rather than cashed out for profit.
Awards (RSUs) and ESPP purchases represent compensation/employee participation and are different from open-market purchases as signals of conviction.

Form 4

Period: 2026-03-17

CFO

Transactions

Exercise/Conversion
Ordinary Shares
[F1][F2]
2026-03-17+3,556→ 121,649 total
Sale
Ordinary Shares
[F3]
2026-03-17$52.77/sh−4,577$241,528→ 117,072 total
Award
Ordinary Shares
[F4]
2026-03-18+5,560→ 122,632 total
Sale
Ordinary Shares
[F3]
2026-03-19$54.14/sh−3,038$164,477→ 119,594 total
Exercise/Conversion
Performance Stock Units
[F1][F5]
2026-03-17−3,556→ 0 total
Exp: 2026-03-15→ Ordinary Shares (3,556 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: John Young|2026-03-19

1 file