X0306 4 2013-09-17 0000890465 NPS PHARMACEUTICALS INC NPSP 0001332933 Melrose Glenn R 550 HILLS DRIVE BEDMINSTER NJ 07921 0 1 0 0 SVP, Human Resources Common Stock 2013-09-17 4 J 0 4539 A 24620 D Common Stock 2013-09-17 4 F 0 1559 28.36 D 23061 D Shares acquired upon vesting of restricted stock units granted to the Reporting Person on September 17, 2012 and reported on a Form 4 filed on September 19, 2012. The Reporting Person previously reported all of the restricted stock units granted to the Reporting Person on September 17, 2012, in Table I of the Form 4 filed on September 19, 2012. However, the amount included in Column 5 of Table I of the Form 4 filed on September 19, 2012 was not carried forward in subsequent Form 4 filings. As such, the Reporting Person's beneficial ownership reflected in Column 5 of Table I includes all of the 13, 620 restricted stock units granted on September 17, 2012 and the 11,000 shares of common stock beneficially owned by the Reporting Person. 4,539 of 13,620 restricted stock units granted on September 17, 2012 have vested and 9,081 are unvested. 4,540 of the unvested restricted stock units will vest on September 17, 2014 and the remaining 4,541 will vest on September 17, 2015. Shares were withheld from the Reporting Person, in an exempt transaction under Rule 16b-3, solely to satisfy tax obligations arising from the vesting of the restricted stock described in this Form 4. /s/ Glenn Melrose, by Edward Stratemeier as attorney-in fact 2013-09-18