Mault William J. 4

What Happened

• William J. Mault, Executive VP and CFO of Summit Midstream Corp, had one tranche of corporation restricted stock units (CRSUs) vest on January 16, 2026, resulting in the conversion/settlement of 10,121 units into common shares. To satisfy tax withholding, 2,757 shares were withheld at $26.81 per share, totaling $73,915. This was a vesting/settlement event (not an open-market purchase or sale).

Key Details

• Transaction date: January 16, 2026.
• Shares converted/issued: 10,121 CRSUs settled into common shares (one-for-one per footnote).
• Tax withholding: 2,757 shares withheld at $26.81/share = $73,915.
• Shares owned after transaction: not specified in the provided data.
• Notable footnotes:
  • F1/F4: Each CRSU equals one common share on settlement; CRSUs and associated DERs do not expire and may be settled in stock or cash at the issuer’s discretion.
  • F2: Common stock was withheld to pay the tax liability.
  • F3: One‑third of the award vested on Jan 16, 2026; remaining CRSUs vest on the third anniversary of the Jan 18, 2024 grant date (Jan 18, 2027), subject to continued employment. DERs provide payment of accrued distributions on vesting.
  • F5: Total includes CRSUs from other tranches with different vesting dates.
• Timeliness: The Form 4 was filed on Jan 21, 2026 for a Jan 16 transaction; this filing appears to be late by one business day.

Context

• This was a routine vesting/settlement of restricted stock units with shares withheld for taxes (common practice), not a market buy or sell that indicates a trading decision. For derivative/vesting events like this, the economic result is receipt of shares (net of withholding) rather than an outright purchase or sale.