X0305 4 2012-04-26 0 0001389072 HeartWare International, Inc. HTWR 0001404955 Harrison Seth Loring C/O APPLE TREE PARTNERS 821 BROADWAY, 5TH FLOOR NEW YORK NY 10003 1 0 0 0 Common Stock 2012-04-26 4 S 0 24677 77.19 D 83725 D Common Stock 2012-04-26 4 S 0 2250 78.03 D 81475 D Common Stock 2012-04-26 4 S 0 90 78.90 D 81385 D Common Stock 2012-04-26 4 S 0 2742 77.19 D 9266 I see note Common Stock 2012-04-26 4 S 0 250 78.03 D 9016 I see note Common Stock 2012-04-26 4 S 0 10 78.90 D 9006 I see note Common Stock 1073961 I see note These shares were sold pursuant to a pre-arranged trading plan in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934. The price represents the weighted average sale price for multiple transactions reported on this line. The prices of the transactions ranged from $76.66 to $77.62. The reporting person has provided the issuer and will provide any security holder of the issuer or the SEC Staff, upon request, information regarding the number of shares sold at each price within the range. The price represents the weighted average sale price for multiple transactions reported on this line. The prices of the transactions ranged from $77.72 to $78.56. The reporting person has provided the issuer and will provide any security holder of the issuer or the SEC Staff, upon request, information regarding the number of shares sold at each price within the range. Represents shares held by Mr. Harrison's spouse, Ms. Ariane Harrison. Represents shares held by Apple Tree Partners I, L.P. Dr. Harrison is the Managing Member of the General Partner of Apple Tree Partners I, L.P. /s/ Lauren Farrell as Attorney-in-Fact 2012-04-30