Person

Dianne B. Ralston

Chief Legal Officer & Sec, Schlumberger

Current S&P 500 boards
0
Current roles
1
Open-market buys
$0
Open-market sales
$6.3M

Current roles

From Section 16 filings (Forms 3, 4 and 5) in the last 13 months.

Past roles

“Last filing” is the latest Form 3/4/5 for that company, an upper bound on the end date.

None on record since 2016.

Sits alongside

People who currently share a board or management team with this person.

Open-market trades

Purchases and sales reported on Form 4 at S&P 500 companies.

DateCompanyTypeSharesPriceValue
Oct 30, 2026SLBSale20,986$53.57$1.1M
Jan 26, 2026SLBSale18,617$49.50$922K
Sep 12, 2025SLBSale39,727$36.08$1.4M
Jan 21, 2025SLBSale43,161$43.96$1.9M
Dec 23, 2022SLBSale10,493$52.52$551K
Dec 8, 2021SLBSale12,885$31.04$400K

SEC reporting-owner ID (CIK) 1614246 · all filings on EDGAR

Dianne B. Ralston (SLB) | USBoard