David A. Tonnel is VP & Controller at Transocean Ltd. (RIG). They have made 12 open-market trades across 2 companies since 2006, most recently 2026-03-25.
CIK 0001318251
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 12 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| RIG | 688,220 | $3.9M |
| SMR | 7,420 | $43K |
| Total | $3.9M |
Shares reported on the most recent Form 4, priced at the 2026-03-26 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 |
|---|---|---|---|---|---|---|---|---|
| SMR | SELL | 2026-03-25 | 2026-03-26 | $11.85 | $54K | -8.4% | +17.6% | -5.1% |
| RIG | SELL | 2023-08-31 | 2023-09-05 | $8.22 | $941K | +2.2% | -6.3% | -21.6% |
| RIG | SELL · 10b5-1 | 2023-07-18 | 2023-07-20 | $8.76 | $15K | +2.2% | -1.1% | -9.9% |
| RIG | SELL · 10b5-1 | 2023-04-17 | 2023-04-19 | $6.53 | $78K | -3.7% | -4.0% | +37.1% |
| RIG | SELL | 2023-02-15 | 2023-02-17 | $7.38 | $367K | +6.3% | -14.8% | -16.2% |
| RIG | SELL | 2023-02-01 | 2023-02-03 | $6.94 | $606K | +9.2% | +8.9% | -15.2% |
| RIG | SELL | 2023-01-18 | 2023-01-20 | $6.15 | $179K | +16.5% | +11.6% | +1.5% |
| RIG | SELL | 2023-01-10 | 2023-01-11 | $5.45 | $374K | +14.5% | +34.9% | +20.2% |
| RIG | SELL | 2023-01-06 | 2023-01-10 | $4.95 | $129K | +13.5% | +34.2% | +16.8% |
| RIG | SELL · 10b5-1 | 2020-02-10 | 2020-02-11 | $4.68 | $47K | -17.6% | -74.1% | -67.8% |
| RIG | SELL | 2019-04-22 | 2019-04-23 | $9.16 | $247K | -19.3% | -28.8% | -39.2% |
| RIG | SELL · 10b5-1 | 2018-10-09 | 2018-10-10 | $14.40 | $19K | -6.1% | -18.1% | -34.5% |
| RIG | SELL | 2018-05-16 | 2018-05-18 | $13.80 | $103K | -7.6% | -11.2% | -22.2% |
| RIG | SELL | 2018-02-13 | 2018-02-15 | $9.39 | $167K | -0.3% | +5.5% | +48.8% |
| RIG | SELL | 2017-04-27 | 2017-05-01 | $11.28 | $107K | +3.1% | -15.4% | -19.5% |
| RIG | SELL | 2014-08-22 | 2014-08-29 | $37.51 | $7K | -20.5% | +1.9% | +1.9% |
| RIG | SELL · 10b5-1 | 2007-05-21 | 2007-05-22 | $98.20 | $36K | -20.5% | +1.9% | +1.9% |
| RIG | SELL · 10b5-1 | 2007-04-30 | 2007-05-01 | $88.25 | $39K | -20.5% | +1.9% | +1.9% |
| RIG | SELL · 10b5-1 | 2007-04-25 | 2007-04-27 | $84.20 | $8K | -20.5% | +1.9% | +1.9% |
| RIG | SELL · 10b5-1 | 2007-03-21 | 2007-03-22 | $79.20 | $32K | -20.5% | +1.9% | +1.9% |
| RIG | SELL · 10b5-1 | 2006-02-10 | 2006-02-10 | $77.00 | $27K | -20.5% | +1.9% | +1.9% |
| RIG | SELL · 10b5-1 | 2006-01-25 | 2006-01-26 | $79.99 | $72K | -20.5% | +1.9% | +1.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.