Michael G. Atieh is Director at Chubb Ltd (CB). They have made 20 open-market trades across 4 companies since 2007, most recently 2026-05-21.
CIK 0001072501
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 20 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CB | 40,014 | $15.0M |
| OYST | 8,671 | $97K |
| OPHT | 425 | $591 |
| ACE | 38,277 | — |
| OSIP | 31,897 | — |
| Total | $15.1M |
Shares reported on the most recent Form 4, priced at the 2026-05-26 close. 2 holdings could not be priced and are excluded from the total.
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 |
|---|---|---|---|---|---|---|---|---|
| CB | SELL | 2026-05-21 | 2026-05-26 | $329.53 | $190K | +0.4% | +1.8% | +6.4% |
| CB | SELL | 2025-06-16 | 2025-06-18 | $287.56 | $309K | +2.2% | -3.2% | -4.0% |
| CB | SELL | 2024-09-03 | 2024-09-05 | $287.49 | $150K | +1.4% | -3.4% | -0.8% |
| CB | SELL | 2024-05-17 | 2024-05-20 | $269.70 | $386K | +2.2% | +0.6% | +3.4% |
| CB | SELL | 2023-07-28 | 2023-08-14 | $208.39 | $313K | +0.5% | +4.8% | +10.9% |
| CB | SELL | 2022-05-20 | 2022-05-23 | $203.49 | $102K | +0.9% | -8.3% | -4.7% |
| CB | SELL | 2021-08-18 | 2021-08-20 | $186.20 | $1.1M | -2.1% | -4.8% | +2.7% |
| CB | SELL | 2021-02-10 | 2021-02-12 | $165.36 | $165K | -0.4% | +5.2% | +2.0% |
| CB | SELL | 2019-11-11 | 2019-11-13 | $151.12 | $227K | -1.3% | +1.7% | +8.0% |
| CB | SELL | 2019-05-09 | 2019-05-13 | $141.87 | $519K | +2.4% | +3.6% | +9.3% |
| CB | SELL | 2018-11-28 | 2018-11-30 | $133.27 | $160K | -3.7% | -3.7% | -0.2% |
| CB | SELL | 2018-06-04 | 2018-06-06 | $130.86 | $241K | -1.5% | -1.7% | +3.6% |
| OPHT | SELL | 2016-01-04 | 2016-01-05 | $72.54 | $9K | -12.3% | -26.2% | -38.7% |
| ACE | SELL | 2012-11-01 | 2012-11-05 | $78.90 | $316K | N/A | N/A | N/A |
| ACE | SELL | 2012-04-30 | 2012-05-01 | $75.79 | $303K | N/A | N/A | N/A |
| ACE | SELL | 2011-02-09 | 2011-02-10 | $63.84 | $383K | N/A | N/A | N/A |
| OSIP | SELL | 2008-11-19 | 2008-11-25 | $38.11 | $381K | N/A | N/A | N/A |
| OSIP | SELL | 2008-11-19 | 2008-11-21 | $39.11 | $391K | N/A | N/A | N/A |
| OSIP | SELL · 10b5-1 | 2008-07-24 | 2008-07-28 | $51.04 | $2.6M | N/A | N/A | N/A |
| OSIP | SELL | 2008-06-10 | 2008-06-12 | $39.64 | $74K | N/A | N/A | N/A |
| ACE | SELL | 2007-05-18 | 2007-05-21 | $61.90 | $186K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.