-------- U. S. SECURITIES AND EXCHANGE COMMISSION -----------------------------
FORM 4 WASHINGTON, D.C. 20549 OMB APPROVAL
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/ / CHECK THIS BOX IF NO STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OMB NUMBER: 3235-0287
LONGER SUBJECT TO EXPIRES: DECEMBER 31, 2001
SECTION 16. FORM 4 OR Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, ESTIMATED AVERAGE BURDEN
FORM 5 OBLIGATIONS MAY Section 17(a) of the Public Utility Holding Company Act of 1935 or HOURS PER RESPONSE .... 0.5
CONTINUE. SEE Section 30(f) of the Investment Company Act of 1940 -----------------------------
INSTRUCTION 1(b).
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1. Name and Address of Reporting Person* 2. Issuer Name and Ticker or Trading Symbol 6. Relationship of Reporting Person
to Issuer (Check all applicable)
Grinstein, Keith F5 Networks, Inc. (ffiv) x Director 10% Owner
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--------------------------------------------------------------------------------------------- Officer (give Other
(Last) (First) (Middle) 3. IRS or Social Security 3. Statement for ---- title ---- (specify
Number of Reporting Month/Year below) below)
C/O F5 Networks, Inc. Person, if an entity February 2000 ----------------- ------------------
200 First Avenue West Suite 500 (Voluntary) ---------------------
-------------------------------------------- 5. If Amendment, 7. Individual or Joint/Group Filing
(Street) Date of Original (Check Applicable Line)
(Month/Year) _x_Form filed by One Reporting Person
Seattle, WA 98121 ___Form filed by More Than One
Reporting Person
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(City) (State) (Zip) 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. Owner- 7. Nature
(Instr. 3) action action or Disposed of (D) Securities ship of In-
Date Code (Instr. 3, 4 and 5) Beneficially Form: direct
(Instr. 8) Owned at Direct Bene-
(Month/ End of (D) or ficial
Day/ ------------------------------------------- Month Indirect Owner-
Year) (A) or (I) ship
Code V Amount (D) Price (Instr. 3 (Instr. 4) (Instr. 4)
and 4)
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Common Stock 2/10/00 P 1,000 A $90.94 1,000 D
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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 4(b)(v). SEC 1474 (3-99)
(Print or Type Responses)
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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FORM 4 (CONTINUED) TABLE II - DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
(E.G., PUTS, CALLS, WARRANTS, OPTIONS, CONVERTIBLE SECURITIES)
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1. Title of Derivative Security 2. Conver- 3. Trans- 4. Transac- 5. Number of Deriv- 6. Date Exer-
(Instr. 3) sion or action tion Code ative Securities Ac- cisable and Ex-
Exercise Date (Instr. 8) quired (A) or Dis- piration Date
Price of (Month/ posed of (D) (Month/Day/
Deriv- Day/ (Instr. 3, 4, and 5) Year)
ative Year)
Security
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Date Expira-
-------------------------------------- Exer- tion
cisable Date
Code V (A) (D)
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7. Title and Amount of Under- 8. Price 9. Number 10. Owner- 11. Nature
lying Securities of of Deriv- ship of In-
(Instr. 3 and 4) Deriv- ative Form direct
ative Securi- of De- Bene-
Secur- ties rivative ficial
ity Bene- Secu- Own-
(Instr. ficially rity: ership
5) Owned Direct (Instr. 4)
at End (D) or
Amount or of Indi-
Title Number of Month rect (I)
Shares (Instr. 4) (Instr. 4)
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Explanation of Responses:
/s/Keith Grinstein March 10, 2000
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**Intentional misstatements or omissions of facts constitute **Signature of Reporting Person Date
Federal Criminal Violations. SEE 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed.
If space provided is insufficient, SEE Instruction 6 for procedure.
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.
Page 2
SEC 1474 (3-99)
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