X0303 4 2011-01-10 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 2011-01-10 4 S 0 45 37.91 D 3258798 D Common Stock 2011-01-10 4 S 0 200 37.94 D 3258598 D Common Stock 2011-01-10 4 S 0 300 37.97 D 3258298 D Common Stock 2011-01-10 4 S 0 100 37.98 D 3258198 D Common Stock 2011-01-10 4 S 0 100 37.985 D 3258098 D Common Stock 2011-01-10 4 S 0 400 38 D 3257698 D Common Stock 2011-01-10 4 S 0 500 38.01 D 3257198 D Common Stock 2011-01-10 4 S 0 100 38.03 D 3257098 D Common Stock 2011-01-10 4 S 0 400 38.04 D 3256698 D Common Stock 2011-01-10 4 S 0 100 38.05 D 3256598 D Common Stock 2011-01-10 4 S 0 200 38.08 D 3256398 D Common Stock 2011-01-10 4 S 0 200 38.1 D 3256198 D Common Stock 2011-01-10 4 S 0 13 38.13 D 3256185 D Common Stock 2011-01-10 4 S 0 100 38.17 D 3256085 D Common Stock 2011-01-10 4 S 0 100 38.22 D 3255985 D Common Stock 2011-01-10 4 S 0 37 38.45 D 3255948 D Common Stock 2011-01-10 4 S 0 1 38.52 D 3255947 D Common Stock 2011-01-11 4 S 0 237 37.13 D 3255710 D Common Stock 2010-01-11 4 S 0 100 37.14 D 3255610 D Common Stock 2011-01-11 4 S 0 100 37.28 D 3255510 D Common Stock 2011-01-11 4 S 0 200 37.34 D 3255310 D Common Stock 2011-01-11 4 S 0 100 37.37 D 3255210 D Common Stock 2011-01-11 4 S 0 100 37.371 D 3255110 D Common Stock 2011-01-11 4 S 0 300 37.39 D 3254810 D Common Stock 2011-01-11 4 S 0 100 37.4 D 3254710 D Common Stock 2011-01-11 4 S 0 200 37.41 D 3254510 D Common Stock 2011-01-11 4 S 0 100 37.52 D 3254410 D Common Stock 2011-01-11 4 S 0 2 37.57 D 3254408 D Common Stock 2011-01-11 4 S 0 383 37.63 D 3254025 D Common Stock 2011-01-11 4 S 0 250 37.65 D 3253775 D Sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Koski Family Limited Partnership on December 31, 2010. 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. Gregory C. Yadley, as Attorney-in-Fact for CHRISTINE L. KOSKI, BEVERLY KOSKI, KOSKI FAMILY LIMITED PARTNERSHIP, ROBERT C. KOSKI AND THOMAS L. KOSKI 2011-01-12