------ UNITED STATES SECURITIES AND EXCHANGE COMMISSION ------------------------------
FORM 4 WASHINGTON, D.C. 20549 OMB APPROVAL
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STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OMB NUMBER: 3235-0287
[ ] CHECK THIS BOX IF NO EXPIRES: DECEMBER 31, 2001
LONGER SUBJECT TO Filed pursuant to Section 16(a) of the Securities ESTIMATED AVERAGE BURDEN
SECTION 16. FORM 4 Exchange Act of 1934, Section 17(a) of the HOURS PER RESPONSE.........0.5
OR FORM 5 OBLIGATIONS Public Utility Holding Company Act of 1935 ------------------------------
MAY CONTINUE. SEE or Section 30(f) of the Investment Company
INSTRUCTION 1(b). Act of 1940
(Print or Type Responses)
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1. Name and Address of Reporting Person* 2. Issuer Name and Ticker or Trading Symbol 6. Relationship of Reporting Person(s)
GRINSTEIN, KEITH F5 NETWORKS, INC. (FFIV) to Issuer (Check all applicable)
-------------------------------------------- ---------------------------------------------- X Director 10% Owner
(Last) (First) (Middle) 3. IRS Identification 4. Statement for ---- ---
401 ELLIOTT AVENUE WEST Number of Reporting Month/Year Officer X Other (specify
-------------------------------------------- Person, if an entity APRIL 2001 ---- --- below)
(Street) (Voluntary) ------------------- (give title below)
SEATTLE, WA 98119 5. If Amendment, DIRECTOR
-------------------------------------------- Date of Original ------------------------------------
(City) (State) (Zip) (Month/Year)
7. Individual or Joint/Group Filing
------------------- (Check Applicable Line)
X Form filed by One
---- Reporting Person
Form filed by More Than
---- One Reporting Person
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TABLE I -- NON-DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
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1. Title of Security 2. Trans- 3. Trans- 4. Securities Acquired (A) 5. Amount of 6. Ownership 7. Nature of
(Instr. 3) action action or Disposed of (D) Securities Form: Indirect
Date Code (Instr. 3, 4 and 5) Beneficially Direct Beneficial
(Instr. 8) Owned at (D) or Ownership
(Month/ End of Month Indirect (Instr. 4)
Day/ --------------------------------------- (Instr. 3 and 4) (I)
Year) Code V Amount (A) or Price (Instr. 4)
(D)
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COMMON STOCK 04/26/01 P 5,000 A $7.31 6,000 D
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Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. Page 1 of 2 (Over)
*If the form is filed by more than one reporting person, see Instruction 4(b)(v). SEC 1474 (3-99)
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 NUMBER.
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