Katherine Brennan is SVP and General Counsel at MARSH & MCLENNAN COMPANIES, INC. (MMC). They have made 1 open-market trade across 1 company since 2026, most recently 2026-09-02.
CIK 0001917984
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 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MRSH | 7,330 | $1.4M |
| MMC | 5,497 | $1.0M |
| Total | $2.4M |
Shares reported on the most recent Form 4, priced at the 2026-09-03 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 |
|---|---|---|---|---|---|---|---|---|
| MRSH | SELL | 2026-09-02 | 2026-09-03 | $187.90 | $225K | -5.3% | -8.6% | — |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.