Bonina Diane 4

What happened

• Diane Bonina, Vice President, General Counsel & Secretary of Federal Signal (FSS), was the recipient of multiple equity awards and had shares withheld to satisfy tax obligations. On 2026-02-26 she was recorded as acquiring 8,316 shares as an award (no purchase price). To cover tax withholding related to equity compensation, 3,718 shares were surrendered/disposed on 2026-02-26 at $117.63 per share (total value ~$437,348). On 2026-02-27 she was granted a restricted stock award of 1,396 shares (no purchase price) and an award of 4,224 derivative/option-based units with a reported price of $116.43 (aggregate reported value $491,800).

Key details

• Transaction dates & prices:
  • 02/26/2026: Awarded 8,316 shares @ $0.00 (acquisition)
  • 02/26/2026: 3,718 shares disposed (tax withholding) @ $117.63 — proceeds/coverage ~$437,348
  • 02/27/2026: Awarded 1,396 restricted shares @ $0.00 (vesting note below)
  • 02/27/2026: Awarded 4,224 derivative/option-based units @ $116.43 — reported value $491,800
• Shares owned after transaction: Not disclosed in the provided excerpt.
• Footnotes of note:
  • F1: The 1,396 restricted shares vest in full on 02/27/2029.
  • F2: Units held in the company 401(k) were adjusted slightly (from 663.6356 to 664.5692) based on the $117.63 price on 02/26/2026.
  • F3: The 4,224 option-type units become exercisable in three equal tranches of 1,408 shares on 02/27/2027, 02/27/2028 and 02/27/2029.
• Filing timeliness: Report filed 2026-03-02 for transactions on 02/26–02/27/2026; this appears to be a timely Form 4 filing (within the standard two business days).

Context

• The 3,718-share disposition was a tax-withholding event (routine) rather than an indicative open-market sale; the larger activity here is the receipt of equity awards (restricted stock + option-style units). The derivative award carries multi-year exercisability/vesting dates; restricted shares vest in 2029. No indication in the provided data that Bonina is a 10% owner.