Dianne B. Ralston
CIK 1614246 · Chief Legal Officer & Sec · last filed 2026-03-17
Dianne B. Ralston is a Chief Legal Officer & Sec who has filed 39 SEC Form 4 insider transactions across 3 companies since 2014. The most recent filing, for SLB, was dated Mar 17, 2026. Across all open-market trades the lifetime net is −$5.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $26.3M across reported positions. 6 SEC filings were submitted jointly with FMC TECHNOLOGIES INC.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
SLB price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
11740 KATY FREEWAY, ENERGY TOWER 3
HOUSTON, TX 77079
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SLB | Chief Legal Officer & Sec | 226,039 | $53.17 | $12.02M | -$5.20M | 22 | 2026-03-17 |
| FTI | EVP, CLO & Sec | 204,435 | $69.81 | $14.27M | -$499.3K | 12 | 2020-03-11 |
| Weatherford International plc (WFT) Delisted | EVP, GC & Secretary | 57,586 | — | — | $0 | 2 | 2014-08-26 |
Recent Filings
39 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-17 | SLB | Mixed | +1,942 | -$55.8K | EDGAR |
| 2026-01-27 | SLB | Mixed | +11,153 | -$1.81M | EDGAR |
| 2026-01-26 | SLB | Notice (144) | −18,617 | -$921.5K | EDGAR |
| 2026-01-23 | SLB | Grant (A) | — | $0 | EDGAR |
| 2026-01-20 | SLB | Mixed | +10,743 | -$171.9K | EDGAR |
| 2025-09-12 | SLB | Notice (144) | −39,727 | -$1.43M | EDGAR |
| 2025-09-12 | SLB | Sell (S) | −39,727 | -$1.43M | EDGAR |
| 2025-03-11 | SLB | Mixed | +6,904 | -$183.1K | EDGAR |
| 2025-01-21 | SLB | Notice (144) | −43,161 | -$1.90M | EDGAR |
| 2025-01-21 | SLB | Mixed | +15,183 | -$3.29M | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.