Merck & Co., Inc. — Director's Dealing 2012

May 4, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co. Inc. (MRK)
CIK: 0000310158
Period of Report: 2012-05-02

Reporting Person: Heller Bridgette P (Exe.VP & Pres.Con.Hlth.Care)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-02	Restricted Stock Unit	$	A	5599.0000	Acquired	2015-05-02	Common Stock (5599.0000)	Direct
2012-05-02	Stock Option (right to buy)	$39.2900	A	80439.0000	Acquired	2022-05-01	Common Stock (80439.0000)	Direct

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F2: The option vests in three equal annual installments beginning May 2, 2013.