Accelerant (ARX) Co-Founder Francis J. O'Neill Sells Shares

What Happened
Francis J. O'Neill, co‑founder and Chief Underwriting Officer of Accelerant Holdings (ARX), sold a total of 215,114 shares in open‑market transactions on July 27–28, 2026. The first sale on 2026-07-27 was 110,467 shares at a weighted average price of $14.63 for $1,616,221; the second on 2026-07-28 was 104,647 shares at a weighted average price of $14.56 for $1,523,451. Total proceeds were approximately $3,139,672. These were sales (not purchases) and were executed pursuant to a prearranged Rule 10b5‑1 trading plan.

Key Details

• Dates & prices:
  • 2026-07-27: 110,467 shares; weighted avg $14.63; total $1,616,221. (Individual prices ranged $14.38–$14.83 — see footnote F2.)
  • 2026-07-28: 104,647 shares; weighted avg $14.56; total $1,523,451. (Individual prices ranged $14.15–$14.95 — see footnote F3.)
• Transaction type/code: Open‑market sales (Code S).
• Plan/footnote: Sales were made under a Rule 10b5‑1 trading plan adopted March 23, 2026 (footnote F1).
• Shares owned after transaction: Not specified in the summary provided — consult the full Form 4 for post‑sale beneficial ownership.
• Filing timeliness: Form 4 filed 2026-07-29; appears to be filed timely (within typical two‑business‑day window).

Context
Sales executed under a 10b5‑1 plan are prearranged and are commonly used for scheduled disposals (for diversification, tax planning, or other personal reasons); they do not necessarily reflect the insider’s current view of the company. For a fuller picture, retail investors should review the full Form 4 (for post‑sale holdings) and recent insider activity to see if this sale is part of a larger pattern.