-------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION -----------------------------
FORM 3 WASHINGTON, D.C. 20549 OMB APPROVAL
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INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES OMB Number: 3235-0104
Expires: September 30, 1998
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Estimated average burden
Section 17(a) of the Public Utility Holding Company Act of 1935 or hours per response .... 0.5
(Print or Type Responses) Section 30(f) of the Investment Company Act of 1940 -----------------------------
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1. Name and Address of Reporting Person* 2. Date of Event Re- 4. Issuer Name AND Ticker or Trading Symbol
quiring Statement
Grinstein Keith (Month/Day/Year) F5 NETWORKS, INC. (FFIV)
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(Last) (First) (Middle) December 3, 1999 5. Relationship of Reporting Person(s) 6. If Amendment, Date
----------------------- to Issuer (Check all applicable) of Original
3. IRS or Social Se- X Director 10% Owner (Month/Day/Year)
C/o F5 Networks, Inc. curity Number of ---- ----
200 First Avenue West Reporting Person Officer (give Other (specify ---------------------
------------------------------------------------- (Voluntary) title below) below) 7. Individual or
(Street) ---- ---- Joint/Group Filing
(Check Applicable
Line)
--------------------------- Form filed by One
X Reporting Person
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Form filed by
More than One
Reporting Person
Seattle, Washington 98119 ---
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(City) (State) (Zip) TABLE I -- NON-DERIVATIVE SECURITIES BENEFICIALLY OWNED
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1. Title of Security 2. Amount of Securities 3. Ownership 4. Nature of Indirect Beneficial
(Instr. 4) Beneficially Owned Form: Direct Ownership (Instr. 5)
(Instr. 4) (D) or Indirect
(I) (Instr. 5)
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Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. (Over)
* If the form is filed by more than one reporting person, SEE Instruction 5(b)(v). SEC 1473 (7-97)
POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED IN THIS FORM ARE NOT REQUIRED
TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY VALID OMB CONTROL NUMBER.
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