X0303 4 2010-03-11 0 0001024795 SUN HYDRAULICS CORP SNHY 0001234878 KOSKI CHRISTINE L 1 0 1 0 0001234877 KOSKI BEVERLY 0 0 1 0 0001234879 KOSKI FAMILY LP 0 0 1 0 0001234880 KOSKI ROBERT C 0 0 1 0 0001234881 KOSKI THOMAS L 0 0 1 0 Common Stock 2010-03-11 4 S 0 1200 29 D 3773447 D Common Stock 2010-03-11 4 S 0 400 29.11 D 3773047 D Common Stock 2010-03-11 4 S 0 600 29.111 D 3772447 D Common Stock 2010-03-11 4 S 0 100 29.12 D 3772347 D Common Stock 2010-03-12 4 S 0 495 28.11 D 3771852 D Common Stock 2010-03-12 4 S 0 100 28.12 D 3771752 D Common Stock 2010-03-12 4 S 0 900 28.121 D 3770852 D Common Stock 2010-03-12 4 S 0 100 28.13 D 3770752 D Common Stock 2010-03-12 4 S 0 5 28.15 D 3770747 D Common Stock 2010-03-12 4 S 0 692 28.19 D 3770055 D Common Stock 2010-03-12 4 S 0 2100 28.191 D 3767955 D Common Stock 2010-03-12 4 S 0 1199 28.2 D 3766756 D Common Stock 2010-03-12 4 S 0 1000 28.201 D 3765756 D Common Stock 2010-03-12 4 S 0 100 28.22 D 3765656 D Common Stock 2010-03-12 4 S 0 9 28.25 D 3765647 D Common Stock 2010-03-12 4 S 0 400 28.53 D 3765247 D Common Stock 2010-03-12 4 S 0 400 28.54 D 3764847 D Common Stock 2010-03-12 4 S 0 200 28.64 D 3764647 D Common Stock 208940 D Common Stock 295969.29 D Common Stock 60000 D Common Stock 1200 I BY KOSKI MANAGEMENT, INC. Shares owned directly by Koski Family Limited Partnership. Shares owned indirectly by Beverly Koski, Christine L. Koski, Robert C. Koski and Thomas L. Koski, each of whom is a general partner of the partnership or the controlling person of a corporate general partner of the partnership. Shares owned directly by Christine L. Koski. Shares owned directly by Beverly Koski. Shares owned directly by Thomas L. Koski. Shares owned indirectly by Beverly Koski. Gregory C. Yadley, as Attorney-in-Fact for CHRISTINE L. KOSKI, BEVERLY KOSKI, KOSKI FAMILY LIMITED PARTNERSHIP, ROBERT C. KOSKI AND THOMAS L. KOSKI 2010-03-15