Dianne B. Ralston is CLO & Secretary at SLB LIMITED/NV (SLB). They have made 6 open-market trades across 2 companies since 2018, most recently 2026-03-13.
CIK 0001614246
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| FTI | 204,435 | $14.2M |
| SLB | 226,039 | $11.2M |
| WFT | 57,586 | $21K |
| Total | $25.5M |
Shares reported on the most recent Form 4, priced at the 2026-03-17 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SLB | SELL | 2026-01-26 | 2026-01-27 | $49.50 | $922K | +0.6% | +2.2% | +9.6% |
| SLB | SELL | 2025-09-12 | 2025-09-12 | $36.08 | $2.9M | -3.3% | -9.9% | +12.7% |
| SLB | SELL | 2025-01-21 | 2025-01-21 | $43.96 | $3.8M | -7.1% | -1.8% | -20.2% |
| SLB | SELL | 2022-12-23 | 2022-12-23 | $52.52 | $1.1M | +2.2% | +4.7% | -14.7% |
| SLB | SELL | 2021-12-08 | 2021-12-09 | $31.04 | $800K | -5.3% | +13.0% | +36.9% |
| FTI | SELL | 2018-03-06 | 2018-03-07 | $29.99 | $999K | -1.0% | -2.6% | +5.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.