OMNICOM (OMC) SVP Andrew Castellaneta Withholds 1,348 Shares

What Happened Andrew Castellaneta, SVP and Chief Accounting Officer of Omnicom Group (OMC), had 1,348 shares disposed on 2026-08-15 as payment for an exercise price or tax liability. The shares were valued at $87.57 each, totaling $118,044. This transaction appears to be a tax-withholding/cashless disposition tied to an equity transaction rather than an open-market sale.

Key Details

• Transaction date and price: 2026-08-15 — 1,348 shares withheld/disposed at $87.57/share (≈ $118,044).
• Shares owned after transaction: not stated in the filing.
• Footnote: F1 notes inclusion of 4,365 shares acquired under Omnicom's employee stock purchase plan (ESPP), indicating the withholding likely relates to that acquisition.
• Filing timeliness: Report filed 2026-08-18 for the 2026-08-15 transaction — timely (within the standard reporting window).

Context The filing code "F" denotes payment of exercise price or tax liability; in practice this usually means the company withheld shares to cover taxes from an ESPP purchase or option/award vesting. Such withholdings are routine and generally do not signal the insider’s view on the company’s stock. Purchases or open-market sales tend to be more informative about insider sentiment than tax-related withholdings.