GUINDO CHIRFI

PrivateCIK: 1722753
Location

CAMBRIDGE, MA

InsiderGUINDO CHIRFICIK 1722753
IssuerMERCK & CO., INC.CIK 310158
Officer· Chief Marketing Officer
Since Jul 2022
+26.03K
Net shares
Net buyer
$0.00
Total acquired
0
Open market trades
0B · 0S
2
Total transactions
26.03K acquired
Non-Derivative Transactions0
No non-derivative transactions reported
Derivative Transactions2

Restricted Stock Unit

Direct
A · Award
Converts to

Common Stock

6.63K shares

Shares

+6.63K

Strike price

Held after

6.63K

Exercisable

5/5/2026

Stock Option (Right to Buy)

Direct
A · Award
Converts to

Common Stock

19.40K shares

Shares

+19.40K

Strike price

113.15

Held after

19.40K

Exercisable

5/5/2026
Non-Derivative Holdings (Post-Transaction)2

Common Stock-401(k) Plan

Indirect
Shares owned57.14

Common Stock

Direct
Shares owned61.61K
Total
61.61K direct·57.14 indirect61.67K
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
GUINDO CHIRFI — Insider Transaction (Form 4) Filed May 7, 2026 | Finecho