ANSS(Delisted)

Form EFFECT - Notice of Effectiveness

Form 15-12G - Securities registration termination [Section 12(g)]

Form POS AM - Post-Effective amendments for registration statement

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments

Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments