Marsh & McLennan Cos (MRSH) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 3, 2026.
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- Filings shown
- 15
- Open-market buys
- 0
- Open-market sells
- 6
Counts cover the 15 most recent Form 4 filings Tradune holds for MRSH (filed Jul 24 – Sep 3, 2026). No completed check of MRSH's Form 4 list on SEC EDGAR is on record yet; the latest MRSH filing Tradune holds was filed Sep 3, 2026. This is not guaranteed to be the complete record — see MRSH's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 15 filings Tradune holds for MRSH filed Jul 24 – Sep 3, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
6 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 2 sales· 17,369 sh
- checkbox disclosed
- On filings with the box not checked
- 4 sales· 26,797 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| John Q. DoylePresident and CEO | 0 | 1 | — | 16,656 | −$3,139,823 |
| Lloyd M. YatesDirector | 0 | 1 | — | 12,000 | −$2,107,800 |
| Martin SouthChief Client Officer | 0 | 1 | — | 7,100 | −$1,348,947 |
| John Jude JonesChief Marketing Officer | 0 | 1 | — | 6,500 | −$1,247,723 |
| Katherine BrennanSVP and General Counsel | 0 | 1 | — | 1,197 | −$224,915 |
| Paul BeswickSVP, Chief Information Officer | 0 | 1 | — | 713 | −$141,174 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at MRSH
No open-market insider purchases (Form 4 code P) were reported for MRSH in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 1,197 | $83.05 | 8,527 | +16% | Sep 2, 2026 |
| Open-market sale 10b5-1 box not checked | 1,197 | $187.90 | 7,330 | −14% | Sep 2, 2026 |
| Option exercise Stock Options (Right to Buy) | 1,197 | — | — | — | Sep 2, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock Options (Right to Buy) | 16,656 | — | — | — | Sep 2, 2026 |
| Option exercise | 16,656 | $73.20 | 133,467 | +14% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 16,656 | $188.51 | 116,811 | −12% | Sep 2, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Restricted Stk. Units-Dir. Stk. Plan | 219 | $188.45 | — | — | Aug 15, 2026 |
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 473 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Restricted Stk. Units-Dir. Stk. Plan | 224 | $188.45 | — | — | Aug 15, 2026 |
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 65 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Restricted Stk. Units-Dir. Stk. Plan | 144 | $188.45 | — | — | Aug 15, 2026 |
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 47 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 194 | $188.45 | 5,952 | +3.4% | Aug 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 192 | $188.45 | 1,617 | +13% | Aug 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 89 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 112 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 48 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition Restricted Stk. Units-Dir. Stk. Plan | 12 | $189.15 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 6,500 | $191.96 | 1,478 | −81% | Aug 6, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 713 | $198.00 | 16,376 | −4.2% | Jul 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 7,100 | $189.99 | 16,632 | −30% | Jul 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 12,000 | $175.65 | 12,001 | −50% | Jul 23, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to MRSH's (Sep 3, 2026).
Frequently asked about MRSH insider activity
How many insiders bought MRSH stock in the last 90 days?
No open-market purchases (Form 4 code P) of MRSH shares were reported by Marsh & McLennan Cos insiders in the trailing 90 days. The 15 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for MRSH?
The most recent Form 4 on this page was filed by John Q. Doyle (President and CEO) on Sep 3, 2026, reporting 3 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market MRSH insider sale shown?
The largest open-market sale among the filings shown was 16,656 MRSH shares at $188.51 (about $3,139,823) by John Q. Doyle (President and CEO) on Sep 2, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track MRSH insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.