Caron Michelle Elizabeth 4

What Happened
Caron Michelle Elizabeth, Chief Financial Officer of A10 Networks (ATEN), had 2,989 performance-based restricted stock units (RSUs) convert to shares (reported as a derivative exercise) on May 14, 2026 at $0.00 per share. To satisfy tax withholding obligations, 748 of the newly issued shares were withheld/disposed on May 15, 2026 at an effective price of $27.00 per share, generating $20,196. This was not an open-market sale of existing holdings but withholding to cover taxes tied to the award.

Key Details

• Transaction dates: conversion/exercise recorded 2026-05-14; tax withholding/disposition recorded 2026-05-15.
• Conversion: 2,989 RSUs -> shares, exercise/conversion price $0.00.
• Tax withholding: 748 shares withheld at $27.00 each for $20,196 (reported as disposition code F).
• Shares owned after the transaction: not specified in this Form 4.
• Footnotes: F1 — 2,989 performance-based RSUs met performance conditions; these shares remain subject to time-based vesting (one-half vested May 14, 2026, with the remainder vesting on anniversaries as described). F2 — the 748 shares were automatically withheld for tax purposes (non-discretionary).
• Filing: Report filed 2026-05-15 covering activity through 2026-05-14 (timely; no late filing indicated).

Context
This was an award conversion and routine tax withholding, not a market sale indicating a change in conviction. For retail investors, the meaningful item is the recognition of performance-based RSUs meeting their performance hurdle; withholding of shares for taxes is a common administrative step.