Ralston Dianne B. 4

What Happened
Dianne B. Ralston, Chief Legal Officer and Secretary of SLB (NYSE: SLB), received 3,203 shares on March 13, 2026 as the final settlement of performance share units (PSUs). To cover tax withholding on the award, 1,261 of those shares were surrendered/disposed at $44.22 per share for proceeds of $55,761. Net shares delivered to Ralston from this vesting were 1,942 shares (3,203 awarded less 1,261 withheld).

Key Details

• Transaction date: 2026-03-13.
• Award: 3,203 shares reported as an acquisition (code A) at $0.00 (PSU settlement).
• Tax withholding: 1,261 shares disposed (code F) at $44.22 for $55,761.
• Shares owned after transaction: not specified in the excerpt of the filing.
• Footnote: PSUs were granted Jan 18, 2023 with three-year performance vesting versus peers; final share amounts were determined after competitors reported 2025 audited results (see footnote F1).
• Filing: Report filed 2026-03-17 for a 2026-03-13 transaction — appears timely (filed within the two-business-day Form 4 window).

Context
This transaction reflects settlement of long-term equity compensation (PSUs) rather than an open-market purchase or selling-for-investment decision. The withholding of shares to satisfy tax obligations is a routine administrative step (cashless/tax-withholding) and should not be read as a separate sell decision by the insider.