0001047469-99-020297 S-1/A 4 19990514 F5 NETWORKS INC 0001048695 7373 911714307 WA 0930 S-1/A 33 333-75817 99621852 200 FIRST AVE WEST STE 500 SEATTLE WA 98119 2065050800 200 FIRST AVE WEST STE 500 SEATTLE WA 98119 F5 LABS INC 19990305 S-1/A 1 000104746999020297-001-seq1-s-1-a.txt FORM S-1/A EX-1.1 2 000104746999020297-002-seq2-ex-1-1.txt EXHIBIT 1.1 EX-5.1 3 000104746999020297-003-seq3-ex-5-1.txt EXHIBIT 5.1 EX-23.1 4 000104746999020297-004-seq4-ex-23-1.txt EXHIBIT 23.1