Novartis AG — Director's Dealing 2012

Feb 23, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDENIX PHARMACEUTICALS INC (IDIX)
CIK: 0001093649
Period of Report: 2012-02-23

Reporting Person: NOVARTIS AG (Indirect 10% Owner)
Reporting Person: NOVARTIS PHARMA AG (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-23	Common Stock	P	35735	$2.41	Acquired	33271516	Indirect
2012-02-23	Common Stock	P	366	$2.47	Acquired	33271882	Indirect
2012-02-23	Common Stock	P	2493	$2.56	Acquired	33274375	Indirect
2012-02-23	Common Stock	P	997	$2.69	Acquired	33275372	Indirect
2012-02-23	Common Stock	P	997	$2.78	Acquired	33276369	Indirect
2012-02-23	Common Stock	P	1321	$2.85	Acquired	33277690	Indirect
2012-02-23	Common Stock	P	3117	$2.90	Acquired	33280807	Indirect
2012-02-23	Common Stock	P	8960	$2.96	Acquired	33289767	Indirect
2012-02-23	Common Stock	P	427	$2.97	Acquired	33290194	Indirect
2012-02-23	Common Stock	P	232	$3.04	Acquired	33290426	Indirect
2012-02-23	Common Stock	P	4336	$3.17	Acquired	33294762	Indirect
2012-02-23	Common Stock	P	3093	$3.79	Acquired	33297855	Indirect
2012-02-23	Common Stock	P	39	$5.10	Acquired	33297894	Indirect
2012-02-23	Common Stock	P	11433	$5.11	Acquired	33309327	Indirect
2012-02-23	Common Stock	P	7402	$5.46	Acquired	33316729	Indirect
2012-02-23	Common Stock	P	883	$5.79	Acquired	33317612	Indirect
2012-02-23	Common Stock	P	436	$5.80	Acquired	33318048	Indirect
2012-02-23	Common Stock	P	493	$6.52	Acquired	33318541	Indirect
2012-02-23	Common Stock	P	2133	$7.39	Acquired	33320674	Indirect

Footnotes

F1: These securities are owned directly by Novartis Pharma AG, a direct, wholly-owned subsidiary of Novartis AG. Novartis AG is indirect beneficial owner of these securities. See attachment.