Cates G. Staley 4

What Happened

• Cates G. Staley, a director of Affiliated Managers Group, purchased 1,500 shares of AMG stock in an open-market transaction on May 6, 2026. The shares were acquired at $305.83 each for a total transaction value of $458,745. This was a purchase (transaction code P), which some investors view as a potentially bullish signal compared with routine insider sales.

Key Details

• Transaction date and price: May 6, 2026 — 1,500 shares at $305.83 per share (total $458,745).
• Transaction type: Purchase (Form 4 code P — open-market purchase).
• Shares owned after transaction: Not specified in the provided filing summary; see the full Form 4 for post-transaction holdings.
• Footnotes/plan: No 10b5-1 plan, tax-withholding, or other footnotes were indicated in the summary provided.
• Filing timeliness: Form filed May 6, 2026 (same day as the reported transaction date), indicating a timely filing.

Context

• This was a straightforward open-market buy by a board director (not an option exercise or gift). Purchases by insiders can be more informative than sales, but they do not guarantee future stock performance. For full details (post-transaction holdings, related footnotes), review the complete Form 4 filing (Accession: 0001004434-26-000053).