MRSH · Marsh & Mclennan Companies, Inc.

Includes 81.17 shares acquired under the Marsh & McLennan Companies, Inc. Employee Stock Purchase Plan for the quarters ended March 31 and June 30, 2026.

This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

These options were granted on February 22, 2017 and vested in four equal annual installments on February 22nd of 2018, 2019, 2020 and 2021.

This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

Annual stock award of 1,349 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

Annual stock award of 1,349 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Reflects shares withheld to cover applicable taxes on shares acquired with director fees pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

The total reflects the reporting person's receipt of cash in lieu of a fractional share.

Annual stock award of 1,349 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Annual stock award of 1,349 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Annual stock award of 1,349 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Annual stock award of 1,349.82 shares pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired in connection with director fees pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired in connection with director fees pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired in connection with director fees pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Acquired with dividend equivalents credited to the reporting person's account under the Marsh & McLennan Companies Directors Stock Compensation Plan.

Not applicable.

Acquired in connection with director fees pursuant to the Marsh & McLennan Companies Directors Stock Compensation Plan.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not Applicable

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest in three equal annual installments on May 15, 2027, 2028 and 2029.

Not applicable.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

These restricted stock units vest on April 15, 2029.

Not applicable.

Vesting and distribution to reporting person of 1,228 shares underlying restricted stock units of which 627 shares were withheld by Marsh & McLennan Companies to cover applicable taxes. These 1,228 shares underlying restricted stock units were granted on March 1, 2023.

Vesting and distribution to reporting person of 1,228 shares underlying restricted stock units of which 627 shares were withheld by Marsh & McLennan Companies to cover applicable taxes. These 1,228 shares underlying restricted stock units were granted on March 1, 2023.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Vesting and distribution to reporting person of 1,228 shares underlying restricted stock units of which 627 shares were withheld by Marsh & McLennan Companies to cover applicable taxes. These 1,228 shares underlying restricted stock units were granted on March 1, 2023.

Not Applicable.

This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

These options were granted on February 22, 2017 and vested in four equal annual installments on February 22nd of 2018, 2019, 2020 and 2021.

This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

Shares sold by the reporting person to satisfy tax withholding obligations.

The security converts to Marsh & McLennan Companies common stock on a 1-for-1 basis.

Vesting and distribution to reporting person of 14,476 shares underlying restricted stock units of which 8,006 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 14,476 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025.

Not applicable.

Vesting and distribution to reporting person of 6,970 shares underlying restricted stock units of which 3,855 were withheld by Marsh & McLennan Companies to cover applicable taxes. These 6,970 shares underlying restricted stock units relate to performance stock units that were granted on February 23, 2023 for the performance period 2023-2025.