X0303 4 2010-05-25 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 2010-05-25 4 S 0 460 25.5 D 3715181 D Common Stock 2010-05-25 4 S 0 40 25.501 D 3715141 D Common Stock 2010-05-25 4 S 0 500 25.51 D 3714641 D Common Stock 2010-05-25 4 S 0 400 25.54 D 3714241 D Common Stock 2010-05-25 4 S 0 1000 25.6 D 3713241 D Common Stock 2010-05-25 4 S 0 400 25.62 D 3712841 D Common Stock 2010-05-25 4 S 0 200 25.63 D 3712641 D Common Stock 2010-05-25 4 S 0 300 25.65 D 3712341 D Common Stock 2010-05-25 4 S 0 1100 25.67 D 3711241 D Common Stock 2010-05-25 4 S 0 400 25.7 D 3710841 D Common Stock 2010-05-25 4 S 0 500 25.705 D 3710341 D Common Stock 2010-05-25 4 S 0 700 25.715 D 3709641 D Common Stock 2010-05-25 4 S 0 1400 25.72 D 3708241 D Common Stock 2010-05-25 4 S 0 1800 25.74 D 3706441 D Common Stock 2010-05-25 4 S 0 500 25.75 D 3705941 D Common Stock 2010-05-25 4 S 0 600 25.8 D 3705341 D Common Stock 2010-05-25 4 S 0 500 25.86 D 3704841 D Common Stock 2010-05-26 4 S 0 500 25.23 D 3704341 D Common Stock 2010-05-26 4 S 0 305 25.25 D 3704036 D Common Stock 2010-05-26 4 S 0 100 25.26 D 3703936 D Common Stock 2010-05-26 4 S 0 300 25.27 D 3703636 D Common Stock 2010-05-26 4 S 0 200 25.3 D 3703436 D Common Stock 2010-05-26 4 S 0 300 25.301 D 3703136 D Common Stock 2010-05-26 4 S 0 100 25.32 D 3703036 D Common Stock 2010-05-26 4 S 0 200 25.33 D 3702836 D Common Stock 2010-05-26 4 S 0 200 25.34 D 3702636 D Common Stock 2010-05-26 4 S 0 800 25.35 D 3701836 D Common Stock 2010-05-26 4 S 0 200 25.36 D 3701636 D Common Stock 2010-05-26 4 S 0 100 25.37 D 3701536 D Common Stock 2010-05-26 4 S 0 100 25.42 D 3701436 D 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. Report is one of three. Paul R. Lynch, as Attorney-in-Fact for CHRISTINE L. KOSKI, BEVERLY KOSKI, KOSKI FAMILY LIMITED PARTNERSHIP, ROBERT C. KOSKI AND THOMAS L. KOSKI 2010-05-27