GUINDO CHIRFI

PrivateCIK: 1722753
Location

CAMBRIDGE, MA

GUINDO CHIRFI (Chief Marketing Officer) exercised options at MERCK & CO., INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise
InsiderGUINDO CHIRFICIK 1722753
IssuerMERCK & CO., INC.CIK 310158
Officer· Chief Marketing Officer
Since Jul 2022
-969.00
Net shares
Net seller
$106.6K
Total sold
0
Open market trades
0B · 0S
3
Total transactions
1.97K acquired · 2.94K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+1.97K

Price / share

$110.03

Trade value

$216.43K

% of position

3.2%
4/29/2026
60.62K62.58K

Common Stock

Direct
F · Tax Withholding

Shares

969.00

Price / share

$110.03

Trade value

$106.62K

% of position

1.5%
4/29/2026
62.58K61.61K
Total

Net shares

+998.00

Net value

$109.81K

Derivative Transactions1

Restricted Stock Unit

Direct
M · Option Exercise
Converts to

Common Stock

1.97K shares

Shares

1.97K

Strike price

Held after

3.94K

Exercisable

4/29/2026
Non-Derivative Holdings (Post-Transaction)1

Common Stock-401(k) Plan

Indirect
Shares owned57.14
Total
57.14 indirect57.14
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
GUINDO CHIRFI — Insider Transaction (Form 4) Filed May 1, 2026 | Finecho