X0306 4 2012-11-27 0 0001452575 Mead Johnson Nutrition Co MJN 0001202294 SIGAL ELLIOT 2701 PATRIOT BLVD GLENVIEW IL 60026 1 0 0 0 Common Stock 3859 D Common Stock 2012-11-27 5 G 0 E 10360 0.00 D 2590 I By Sigal Family Investments, LLC Common Stock 2012-11-27 5 G 0 E 5180 0.00 A 5180 I By the Ruth L. Sigal 2012 Irrevocable Trust Common Stock 2012-11-27 5 G 0 E 5180 0.00 A 5180 I By the C. Elliott Sigal 2012 Irrevocable Trust On September 6, 2012, in a transaction exempt from Section 16 (including the reporting requirements) by virtue of 16a-13, the reporting person and his wife contributed their combined interest in 12,950 directly-owned shares of MJN common stock to Sigal Family Investments, LLC ("SFI") in exchange for interests in SFI. Following this transaction, the reporting person had direct ownership of 3,859 shares of MJN common stock and indirect ownership, together with his wife, of 12,950 shares of MJN common stock through SFI. As of September 6, 2012, the reporting person held a 60% interest in SFI and the reporting person's wife held a 40% interest in SFI. The reporting person is the sole manager of SFI. On November 27, 2012, the reporting person's wife contributed her 40% interest in SFI to the Ruth L. Sigal 2012 Irrevocable Trust for the benefit of the reporting person and their children. On November 27, 2012, the reporting person contributed a 40% interest in SFI to the C. Elliott Sigal 2012 Irrevocable Trust for the benefit of the reporting person's wife and their children. The reporting person's wife serves as a co-trustee. The reporting person retains a 20% interest in SFI. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose. /s/ Eryk J. Spytek, Attorney-in-Fact 2012-12-03