Initial Statement of Beneficial Ownership Filed by Dow Inc. Officer Charles Ross Zimmer Jr.

Executive Overview

Charles Ross Zimmer Jr., President of Performance Materials & Coatings at Dow Inc. ($DOW), filed an initial Form 3 statement of beneficial ownership following his appointment as a Section 16 reporting officer effective October 15, 2026.

Beneficial Holdings Breakdown

1. Non-Derivative Securities (Common Stock)

• Direct Ownership: 5,671 shares. This balance includes unvested restricted stock units (RSUs):
  • 1,496 shares vesting February 15, 2027
  • 2,153 shares vesting February 13, 2028
  • 2,022 shares vesting February 12, 2029
• Indirect Ownership (Spouse): 1,035 shares (including 659 RSUs vesting February 13, 2028).
• Indirect Ownership (401(k) Plan): 5,517.103 shares.
• Total Non-Derivative Ownership: 12,223.103 shares.

2. Derivative Securities (Non-Qualified Stock Options)

The reporting person holds four tranches of non-qualified stock options covering a total of 22,410 underlying shares of common stock:

• 2,647 options exercisable at $59.08 per share, expiring February 9, 2033 (fully vested).
• 3,771 options exercisable at $55.17 per share, expiring February 15, 2034 (two-thirds vested; remaining one-third vests February 15, 2027).
• 4,990 options exercisable at $38.34 per share, expiring February 13, 2035 (one-third vested; remaining two-thirds vest February 13, 2027 and 2028).
• 11,002 options exercisable at $32.65 per share, expiring February 12, 2036 (vests in three equal annual installments beginning February 12, 2027).

Assessment & Significance

This filing represents a standard initial disclosure of equity holdings following the insider's assumption of a Section 16 reporting role. There are no open-market purchases or sales disclosed in this filing, and therefore trading significance is categorized as Low.