Merck & Co., Inc. — Director's Dealing 2013

May 8, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merck & Co. Inc. (MRK)
CIK: 0000310158
Period of Report: 2013-05-06

Reporting Person: DeLuca Richard R. (EVP&Pres, Merck Animal Health)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-06	Stock Option (right to buy)	$44.9800	A	70853.0000	Acquired	2023-05-05	Common Stock (70853.0000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - 401(k) Plan	419.0660	Indirect

Footnotes

F1: Includes shares acquired and dividends through April 5, 2013 in the Merck U.S. Savings Plan, a 401(k) plan.

F2: The option vests in three equal annual installments beginning May 6, 2014.