As filed with the Securities and Exchange
Commission on December 14, 2000 Registration No. 333-

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

F5 NETWORKS, INC.
(Exact Name of Registrant as Specified in Its Charter)

                                   Washington
                                   ----------
                          (State or Other Jurisdiction
                        of Incorporation or Organization)

                                   91-1714307
                                   ----------
                      (I.R.S. Employer Identification No.)

501 Elliott Avenue West, Seattle, Washington                            98119
--------------------------------------------                            -----
(Address of Principal Executive Offices)                              (Zip Code)

2000 EMPLOYEE EQUITY INCENTIVE PLAN

NONQUALIFIED STOCK OPTION AGREEMENTS
(Full Title of the Plan)

Joann Reiter
F5 Networks, Inc.
501 Elliott Avenue West
Seattle, WA 98119
(Name and Address of Agent for Service)

(206) 272-5555
(Telephone Number, Including Area Code, of Agent for Service)

CALCULATION OF REGISTRATION FEE

========================= ======================= ======================= ====================== =======================
                                                                                Proposed
        Title of                                     Proposed Maximum            Maximum               Amount of
       Securities              Amount To Be           Offering Price            Aggregate             Registration
    To Be Registered            Registered            Per Share (1)        Offering Price (1)             Fee
------------------------- ----------------------- ----------------------- ---------------------- -----------------------
     common stock,              2,895,000             (See Notes to
      no par value                shares              Calculation of          $101,396,625              $26,769
                                                    Registration Fee)
========================= ======================= ======================= ====================== =======================

(1) Estimated solely for the purpose of calculating the amount of the registration fee pursuant to Rule 457(h) promulgated under the Securities Act 1933, as amended (the "Securities Act"). The price per share and aggregate offering price are based upon (a) the aggregate exercise price for shares issuable under the three Nonqualified Stock Option Agreements or subject to outstanding options granted by F5 Networks, Inc. (the "Company") under the 2000 Employee Equity Incentive Plan or (b) the average of the high and low prices of the Company's common stock as reported on the Nasdaq Stock Market for December 13, 2000 for shares reserved for future issuance pursuant to the 2000 Employee Equity Incentive Plan (pursuant to Rule 457(c) under the Securities Act). The chart below details the calculations of the registration fee.

Page 1 of 7 Pages Exhibit Index is located on Page 7


NOTES TO CALCULATION OF REGISTRATION FEE

---------------------------------------------- -------------------------------------------- ----------------------------------------
Type of shares                                 Number of shares                             Offering Share Price/Registration Fee
---------------------------------------------- -------------------------------------------- ----------------------------------------
Shares issuable under the Nonqualified Stock   645,000                                      $27,451,200
Option Agreement
                                                50,000                                      $    50,000

                                               200,000                                      $ 6,450,000
---------------------------------------------- -------------------------------------------- ----------------------------------------
Shares issuable pursuant to outstanding        1,168,996                                    $46,404,404
options under the 2000 Employee Equity
Incentive Plan
---------------------------------------------- -------------------------------------------- ----------------------------------------
Shares reserved for issuance pursuant to the   831,004                                      $21,041,021
2000 Employee Equity Incentive Plan
---------------------------------------------- -------------------------------------------- ----------------------------------------
Proposed Maximum Offering Price                                                             $101,396,625
---------------------------------------------- -------------------------------------------- ----------------------------------------
Registration Fee                                                                            $26,769
---------------------------------------------- -------------------------------------------- ----------------------------------------

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PART II

INFORMATION REQUIRED IN THE REGISTRATION

STATEMENT

Item 3. Incorporation of Documents by Reference.

The following documents filed by F5 Networks, Inc. (the "Company") with the Securities and Exchange Commission are incorporated by reference into this Registration Statement:

(a) the Annual Report on Form 10-K for the year ended September 30, 2000; and

(b) the description of the Company's common stock contained in the Company's Registration Statement Form 8-A, filed May 11, 1999 under the Securities Exchange Act of 1934, as amended (the "Exchange Act") including any amendments or reports filed for the purposes of updating such description.

All documents subsequently filed by the Company pursuant to Sections
13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the filing of a post-effective amendment which indicates that all securities offered have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference herein and to be part hereof from the date of filing of such documents.

Item 4. Description of Securities.

Not Applicable

Item 5. Interests of Named Experts and Counsel.

Not Applicable

Item 6. Indemnification of Directors and Officers.

Sections 23B.08.500 through 23.B.08.600 of the Washington Business Corporation Act (the "WBCA") authorize a court to award, or a corporation's board of directors to grant, indemnification to directors and officers on terms sufficiently broad to permit indemnification under certain circumstances for liabilities arising under the Securities Act of 1933, as amended (the "Securities Act"). Section 23B.08.320 of the WBCA authorizes a corporation to limit a director's liability to the corporation or its shareholders for monetary damages for acts or omissions as a director, except in certain circumstances involving intentional misconduct, knowing violations of law or illegal corporate loans or distributions, or any transaction from which the director personally receives a benefit in money, property or services to which the director is not legally entitled.

The Company's Second Amended and Restated Articles of Incorporation and Amended and Restated Bylaws contain provisions permitting the Company to indemnify its directors and officers to the full extent permitted by Washington law. In addition, the Company's Second Amended and Restated Articles of Incorporation contain a provision implementing, to the fullest extent permitted by Washington law, the above limitations on a director's liability to the Company and its shareholders. The Company has entered into certain indemnification agreements with its directors and certain of its officers, the form of which is attached as Exhibit 10.1 to its Registration Statement on Form S-1 (File No. 333-75817). The indemnification agreements provide the Company's directors and certain of its officers with indemnification to the maximum extent permitted by the WBCA. The directors and officers of the Company also may be indemnified against liability they may incur for serving in that capacity pursuant to a liability insurance policy maintained by the Company for this purpose.

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Item 7. Exemption from Registration Claimed.

Not Applicable

Item 8. Exhibits.

Exhibit Number                  Exhibit
--------------                  -------
      4.1        Second Amended and Restated Articles of Incorporation (Incorporated by
                 reference to Exhibit 3.2 to the Registrant's Registration Statement on
                 Form S-1, File No. 333-75817).

      4.2        Amended and Restated Bylaws (Incorporated by reference to Exhibit 3.4 to
                 the Registrant's Registration Statement on Form S-1, File No. 333-75817).

      4.3        Specimen Stock Certificate (Incorporated by reference to Exhibit 4.1 to
                 the Registrant's Registration Statement on Form S-1, File No. 333-75817).

      5.1        Opinion of Heller Ehrman White & McAuliffe LLP.

     10.1        F5 Networks, Inc. 2000 Employee Equity Incentive Plan.

     10.2        F5 Networks, Inc. Nonqualified Option Agreement between the Company and
                 John  McAdam.   (Incorporated  by  reference  to
                 Exhibit 10.11 to  Registrant's  Annual Report on
                 Form  10-K  for the  year  ended  September  30,
                 2000.)

     10.3        F5 Networks, Inc. Nonqualified Option Agreement between the Company and
                 John McAdam. (Incorporated by reference to Exhibit 10.12 to Registrant's
                 Annual Report on Form 10-K for the year ended September 30, 2000.)

     10.4        F5 Networks, Inc. Nonqualified Option Agreement between the Company and
                 Jeff Pancottine

     23.1        Consent of PricewaterhouseCoopers LLP, Independent Accountants.

     23.2        Consent of Heller Ehrman White & McAuliffe LLP (Included in its opinion
                 filed as Exhibit 5.1).

     24.1        Power of Attorney (Included on the signature page of this Registration
                 Statement).

Item 9. Undertakings.

(a) The undersigned Registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

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(i) To include any prospectus required by section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement;

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed by the Registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in this Registration Statement.

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue.

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Signatures

The Registrant. Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Seattle, State of Washington, on this 13th day of December, 2000.

F5 NETWORKS, INC.

By:  /s/ John McAdam
   -----------------------------
     John McAdam, President and
     Chief Executive Officer

Power of Attorney

Each person whose signature appears below constitutes and appoints John McAdams or Joann Reiter, or either of them, his true and lawful attorney-in-fact, with the power of substitution and resubstitution, for him in his name, place or stead, in any and all capacities, to sign any or all amendments to this Registration Statement, and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that said attorneys-in-fact and their agents or substitutes, may lawfully do or lawfully cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

        Signature                                              Title                                  Date
        ---------                                              -----                                  ----
 /s/ John McAdam                                President, Chief Executive Officer and          December 13, 2000
-------------------------------                 Director (Principal Executive Officer)
John McAdam

/s/ Robert J. Chamberlain                       Vice President and Chief Financial Officer      December 13, 2000
-------------------------------                 (Principal Financial and Accounting Officer)
Robert J. Chamberlain

/s/ Jeffrey S. Hussey                           Director                                        December 13, 2000
-------------------------------
Jeffrey S. Hussey

/s/ Carlton G. Amdahl                           Director                                        December 13, 2000
-------------------------------
Carlton G. Amdahl

/s/ Keith D. Grinstein                          Director                                        December 13, 2000
-------------------------------
Keith D. Grinstein

/s/ Karl D. Guelich                             Director                                        December 13, 2000
-------------------------------
Karl D. Guelich

/s/ Alan Higginson                              Director                                        December 13, 2000
-------------------------------
Alan Higginson

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Exhibit Number                  Exhibit
--------------                  -------
      4.1        Second Amended and Restated Articles of Incorporation (Incorporated by
                 reference to Exhibit 3.2 to the Registrant's Registration Statement on
                 Form S-1, File No. 333-75817).

      4.2        Amended and Restated Bylaws (Incorporated by reference to Exhibit 3.4 to
                 the Registrant's Registration Statement on Form S-1, File No. 333-75817).

      4.3        Specimen Stock Certificate (Incorporated by reference to Exhibit 4.1 to
                 the Registrant's Registration Statement on Form S-1, File No. 333-75817).

      5.1        Opinion of Heller Ehrman White & McAuliffe LLP.

     10.1        F5 Networks, Inc. 2000 Employee Equity Incentive Plan.

     10.2        F5 Networks, Inc. Nonqualified Option Agreement between the Company and
                 John  McAdam.   (Incorporated  by  reference  to
                 Exhibit 10.11 to  Registrant's  Annual Report on
                 Form  10-K  for the  year  ended  September  30,
                 2000.)

     10.3        F5 Networks, Inc. Nonqualified Option Agreement between the Company and
                 John McAdam. (Incorporated by reference to Exhibit 10.12 to Registrant's
                 Annual Report on Form 10-K for the year ended September 30, 2000.)

     10.4        F5 Networks, Inc. Nonqualified Option Agreement between the Company and
                 Jeff Pancottine

     23.1        Consent of PricewaterhouseCoopers LLP, Independent Accountants.

     23.2        Consent of Heller Ehrman White & McAuliffe LLP (Included in its opinion
                 filed as Exhibit 5.1).

     24.1        Power of Attorney (Included on the signature page of this Registration
                 Statement).

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December 13, 2000

F5 Networks, Inc.
200 First Avenue, Suite 500
Seattle, Washington 98119

Re: Registration Statement on Form S-8

Ladies and Gentlemen:

This opinion is furnished to F5 Networks, Inc. (the "Company") in connection with the filing of a Registration Statement on Form S-8 (the "Registration Statement") with the Securities and Exchange Commission under the Securities Act of 1933, as amended, relating to the proposed sale by the Company of up to 2,895,000 shares (the "Shares") of common stock, no par value (the "Common Stock"), issuable by the Company pursuant to the Company's 2000 Employee Equity Incentive Plan (the "Plan"), two Nonqualified Stock Option Agreement dated July 24, 2000 between the Company and John McAdam and the Nonqualified Stock Option Agreement dated October 23, 2000 between the Company and Jeff Pancottine (collectively, the "Option Agreements").

We have based our opinion upon our review of the following records, documents, instruments and certificates:

a) the Articles of Incorporation of the Company;

b) the Bylaws of the Company;

c) records certified to us by an officer of the Company as constituting all records of proceedings and of actions of the Board of Directors and shareholders relating to the adoption of the Plan and approval of the Option Agreement and the reservation of the Shares for issuance pursuant to the Plan and the Option Agreement;

d) the Plan; and

e) the Option Agreements.

In connection with this opinion, we have, with your consent, assumed the authenticity of all records, documents and instruments submitted to us as originals, the genuineness of all signatures, the legal capacity of natural persons and the authenticity and conformity to the originals of all records, documents and instruments submitted to us as copies.


This opinion is limited to the laws of the State of Washington. We disclaim any opinion as to any statute, rule, regulation, ordinance, order or other promulgation of any other jurisdiction or any federal, regional or local governmental body.

Based upon the foregoing and our examination of such questions of law as we have deemed necessary or appropriate for the purpose of this opinion, and subject to the assumptions and qualifications expressed herein, it is our opinion that the reservation for issuance of the Shares pursuant to the Plan and the Option Agreements has been duly authorized and upon payment of the purchase price for the Shares and issuance and delivery of the Shares pursuant to the terms of the Plan or the Option Agreements, the Shares will be validly issued, fully paid and non-assessable.

Our opinion is qualified to the extent that in the event of a stock split, share dividend or other reclassification of the Common Stock effected subsequent to the date hereof, the number of shares of Common Stock issuable under the Plan or the Option Agreement may be adjusted automatically, as set forth in those documents, such that the number of such shares, as so adjusted, may exceed the number of Company's remaining authorized, but unissued shares of Common Stock following such adjustment.

We expressly disclaim any obligation to advise you of any developments in areas covered by this opinion that occur after the date of this opinion.

We hereby authorize and consent to the use of this opinion as Exhibit 5.1 to the Registration Statement.

Very truly yours,

/s/ Heller Ehrman White & McAuliffe LLP


F5 NETWORKS, INC.

2000 EMPLOYEE EQUITY INCENTIVE PLAN

ADOPTED BY BOARD OF DIRECTORS JULY 1, 2000
TERMINATION DATE: JUNE 30, 2010

1. Purposes.

(a) Eligible Stock Award Recipients. The persons eligible to receive Stock Awards are the Employees and Consultants of the Company and its Affiliates; provided that no individual who is an Officer or Director of the Company may be granted a Stock Award under the Plan.

(b) Available Stock Awards. The purpose of the Plan is to provide a means by which eligible recipients of Stock Awards may be given an opportunity to benefit from increases in value of the Common Stock through the granting of the following Stock Awards: (i) Nonstatutory Stock Options, (ii) stock bonuses and
(iii) rights to acquire restricted stock.

(c) General Purpose. The Company, by means of the Plan, seeks to retain the services of the group of persons eligible to receive Stock Awards, to secure and retain the services of new members of this group and to provide incentives for such persons to exert maximum efforts for the success of the Company and its Affiliates.

2. Definitions.

(a) "Affiliate" means any parent corporation or subsidiary corporation of the Company, whether now or hereafter existing, as those terms are defined in Sections 424(e) and (f), respectively, of the Code.

(b) "Board" means the Board of Directors of the Company.

(c) "Code" means the Internal Revenue Code of 1986, as amended.

(d) "Committee" means a Committee appointed by the Board in accordance with subsection 3(c).

(e) "Common Stock" means the common stock of the Company.

(f) "Company" means F5 Networks, Inc., a Washington corporation.

(g) "Consultant" means any person, including an advisor, who is engaged by the Company or an Affiliate to render services other than as an Employee or as a Director.


(h) "Continuous Service" means that the Participant's service with the Company or an Affiliate, whether as an Employee or Consultant, is not interrupted or terminated. The Participant's Continuous Service shall not be deemed to have terminated merely because of a change in the capacity in which the Participant renders service to the Company or an Affiliate as an Employee or Consultant or a change in the entity for which the Participant renders such service, provided that there is no interruption or termination of the Participant's Continuous Service. For example, a change in status from an Employee of the Company to a Consultant of an Affiliate will not constitute an interruption of Continuous Service. The Board or the chief executive officer of the Company, in that party's sole discretion, may determine whether Continuous Service shall be considered interrupted in the case of any leave of absence approved by that party, including sick leave, military leave or any other personal leave.

(i) "Director" means a member of the Board of Directors of the Company.

(j) "Disability" means the permanent and total disability of a person within the meaning of Section 22(e)(3) of the Code.

(k) "Employee" means any person employed by the Company or an Affiliate.

(l) "Exchange Act" means the Securities Exchange Act of 1934, as amended.

(m) "Fair Market Value" means, as of any date, the value of the Common Stock. If the Common Stock is listed on any established stock exchange or traded on the NASDAQ National Market or the NASDAQ SmallCap Market, the Fair Market Value of a share of Common Stock shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Common Stock) on the day of determination or, if the day of determination is not a market trading day, then on the last market trading day prior to the day of determination, as reported in THE WALL STREET JOURNAL or such other source as the Board deems reliable. In the absence of such markets for the Common Stock, the Fair Market Value shall be determined in good faith by the Board.

(n) "Nonstatutory Stock Option" means an Option not intended to qualify as an incentive stock option within the meaning of Section 422 of the Code and the regulations promulgated thereunder.

(o) "Officer" means a person who is an officer of the Company within the meaning of Section 16 of the Exchange Act and the rules and regulations promulgated thereunder.

(p) "Option" means a Nonstatutory Stock Option granted pursuant to the Plan. Options granted under the Plan are not intended to be incentive stock options within the meaning of Section 422 of the Code and the regulations promulgated thereunder.

(q) "Option Agreement" means a written agreement between the Company and an Optionholder evidencing the terms and conditions of an individual Option grant. Each Option Agreement shall be subject to the terms and conditions of the Plan.

(r) "Optionholder" means a person to whom an Option is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Option.

2

(s) "Participant" means a person to whom a Stock Award is granted pursuant to the Plan or, if applicable, such other person who holds an outstanding Stock Award.

(t) "Plan" means this F5 Networks, Inc. 2000 Employee Incentive Plan.

(u) "Rule 16b-3" means Rule 16b-3 promulgated under the Exchange Act or any successor to Rule 16b-3, as in effect from time to time.

(v) "Securities Act" means the Securities Act of 1933, as amended.

(w) "Stock Award" means any right granted under the Plan, including an Option, a stock bonus and a right to acquire restricted stock.

(x) "Stock Award Agreement" means a written agreement between the Company and a holder of a Stock Award evidencing the terms and conditions of an individual Stock Award grant. Each Stock Award Agreement shall be subject to the terms and conditions of the Plan.

3. Administration.

(a) Administration by Board. The Board shall administer the Plan unless and until the Board delegates administration to a Committee, as provided in subsection 3(c).

(b) Powers of Board. The Board shall have the power, subject to, and within the limitations of, the express provisions of the Plan:

(i) To determine from time to time which of the persons eligible under the Plan shall be granted Stock Awards; when and how each Stock Award shall be granted; what type or combination of types of Stock Award shall be granted; the provisions of each Stock Award granted (which need not be identical), including the time or times when a person shall be permitted to receive stock pursuant to a Stock Award; and the number of shares with respect to which a Stock Award shall be granted to each such person.

(ii) To construe and interpret the Plan and Stock Awards granted under it, and to establish, amend and revoke rules and regulations for its administration. The Board, in the exercise of this power, may correct any defect, omission or inconsistency in the Plan or in any Stock Award Agreement, in a manner and to the extent it shall deem necessary or expedient to make the Plan fully effective.

(iii) To amend the Plan or a Stock Award as provided in Section 12.

(iv) Generally, to exercise such powers and to perform such acts as the Board deems necessary or expedient to promote the best interests of the Company which are not in conflict with the provisions of the Plan.

(c) Delegation to Committee. The Board may delegate administration of the Plan to a Committee or Committees of one or more members of the Board, and the term "Committee" shall apply to any person or persons to whom such authority has been delegated. If administration is delegated to a Committee, the Committee

3

shall have, in connection with the administration of the Plan, the powers theretofore possessed by the Board, including the power to delegate to a subcommittee any of the administrative powers the Committee is authorized to exercise (and references in this Plan to the Board shall thereafter be to the Committee or subcommittee), subject, however, to such resolutions, not inconsistent with the provisions of the Plan, as may be adopted from time to time by the Board. The Board may abolish the Committee at any time and revest in the Board the administration of the Plan.

4. Shares Subject to the Plan.

(a) Share Reserve. Subject to the provisions of Section 11 relating to adjustments upon changes in stock, the stock that may be issued pursuant to Stock Awards shall not exceed in the aggregate two million (2,000,000) shares of Common Stock.

(b) Reversion of Shares to the Share Reserve. If any Stock Award shall for any reason expire or otherwise terminate, in whole or in part, without having been exercised in full, the stock not acquired under such Stock Award shall revert to and again become available for issuance under the Plan. The number of shares of Common Stock that may be issued pursuant to Stock Awards, as specified in subsection 4(a), shall only be reduced to reflect new shares that are actually delivered under the Plan. Therefore, a stock-for-stock exercise of an Option shall result in only the net number of additional shares of Common Stock being counted against the share reserve.

(c) Source of Shares. The stock subject to the Plan may be unissued shares or reacquired shares, bought on the market or otherwise.

5. Eligibility.

(a) Eligibility for Specific Stock Awards. Stock Awards may be granted to Employees and Consultants, but not to any individual who is an Officer or Director of the Company. In addition, any Employee who is represented by a collective bargaining representative shall be ineligible to receive Stock Awards under the Plan, except to the extent specified in the collective bargaining agreement governing such Employee.

6. Option Provisions.

Each Option shall be in such form and shall contain such terms and conditions as the Board shall deem appropriate. The provisions of separate Options need not be identical, but each Option shall include (through incorporation of provisions hereof by reference in the Option or otherwise) the substance of each of the following provisions:

(a) Term. No Option shall be exercisable after the expiration of ten (10) years from the date it was granted.

(b) Exercise Price. The exercise price of each Option shall be not less than one hundred percent (100%) of the Fair Market Value of the stock subject to the Option on the date the Option is granted.

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(c) Consideration. The purchase price of stock acquired pursuant to an Option shall be paid, to the extent permitted by applicable statutes and regulations, either (i) in cash at the time the Option is exercised or (ii) at the discretion of the Board by (1) delivery to the Company of other Common Stock, (2) according to a deferred payment or other arrangement (which may include, without limiting the generality of the foregoing, the use of other Common Stock) with the Participant or (3) in any other form of legal consideration that may be acceptable to the Board.

In the case of any deferred payment arrangement, interest shall be compounded at least annually and shall be charged at the minimum rate of interest necessary to avoid the treatment as interest, under any applicable provisions of the Code, of any amounts other than amounts stated to be interest under the deferred payment arrangement.

(d) Transferability of an Option. An Option shall be transferable to the extent provided in the Option Agreement. If the Option does not provide for transferability, then the Option shall not be transferable except by will or by the laws of descent and distribution and shall be exercisable during the lifetime of the Optionholder only by the Optionholder. Notwithstanding the foregoing provisions of this subsection 6(d), the Optionholder may, by delivering written notice to the Company, in a form satisfactory to the Company, designate a third party who, in the event of the death of the Optionholder, shall thereafter be entitled to exercise the Option.

(e) Vesting Generally. The total number of shares of Common Stock subject to an Option may, but need not, vest and therefore become exercisable in periodic installments which may, but need not, be equal. The Option may be subject to such other terms and conditions on the time or times when it may be exercised (which may be based on performance or other criteria) as the Board may deem appropriate. The vesting provisions of individual Options may vary. The provisions of this subsection 6(e) are subject to any Option provisions governing the minimum number of shares as to which an option may be exercised.

(f) Termination of Continuous Service. In the event an Optionholder's Continuous Service terminates (other than upon the Optionholder's death or Disability), the Optionholder may exercise his or her Option (to the extent that the Optionholder was entitled to exercise it as of the date of termination) but only within such period of time ending on the earlier of (i) the date three (3) months following the termination of the Optionholder's Continuous Service (or such longer or shorter period specified in the Option Agreement) or (ii) the expiration of the term of the Option as set forth in the Option Agreement. If, after termination, the Optionholder does not exercise his or her Option within the time specified in the Option Agreement, the Option shall terminate.

(g) Extension of Termination Date. An Optionholder's Option Agreement may also provide that if the exercise of the Option following the termination of the Optionholder's Continuous Service (other than upon the Optionholder's death or Disability) would be prohibited at any time solely because the issuance of shares would violate the registration requirements under the Securities Act, then the Option shall terminate on the earlier of (i) the expiration of the term of the Option set forth in subsection 6(a) or (ii) the expiration of a period of

5

three (3) months after the termination of the Optionholder's Continuous Service during which the exercise of the Option would not be in violation of such registration requirements.

(h) Disability of Optionholder. In the event an Optionholder's Continuous Service terminates as a result of the Optionholder's Disability, the Optionholder may exercise his or her Option (to the extent that the Optionholder was entitled to exercise it as of the date of termination), but only within such period of time ending on the earlier of (i) the date twelve (12) months following such termination (or such longer or shorter period specified in the Option Agreement, which, for Options granted prior to the Listing Date, shall not be less than six (6) months) or (ii) the expiration of the term of the Option as set forth in the Option Agreement. If, after termination, the Optionholder does not exercise his or her Option within the time specified herein, the Option shall terminate.

(i) Death of Optionholder. In the event (i) an Optionholder's Continuous Service terminates as a result of the Optionholder's death or (ii) the Optionholder dies within the period (if any) specified in the Option Agreement after the termination of the Optionholder's Continuous Service for a reason other than death, then the Option may be exercised (to the extent the Optionholder was entitled to exercise the Option as of the date of death) by the Optionholder's estate, by a person who acquired the right to exercise the Option by bequest or inheritance or by a person designated to exercise the option upon the Optionholder's death pursuant to subsection 6(d), but only within the period ending on the earlier of (1) the date eighteen (18) months following the date of death or (2) the expiration of the term of such Option as set forth in the Option Agreement. If, after death, the Option is not exercised within the time specified herein, the Option shall terminate.

7. Provisions of Stock Awards Other Than Options.

(a) Stock Bonus Awards. Each stock bonus agreement shall be in such form and shall contain such terms and conditions as the Board shall deem appropriate. The terms and conditions of stock bonus agreements may change from time to time, and the terms and conditions of separate stock bonus agreements need not be identical, but each stock bonus agreement shall include (through incorporation of provisions hereof by reference in the agreement or otherwise) the substance of each of the following provisions:

(i) Consideration. A stock bonus shall be awarded in consideration for past services actually rendered to the Company for its benefit.

(ii) Vesting. Shares of Common Stock awarded under the stock bonus agreement may, but need not, be subject to a share repurchase option in favor of the Company in accordance with a vesting schedule to be determined by the Board.

(iii) Termination of Participant's Continuous Service. In the event a Participant's Continuous Service terminates, the Company may reacquire any or all of the shares of Common Stock held by the Participant which have not vested as of the date of termination under the terms of the stock bonus agreement.

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(iv) Transferability. Rights to acquire shares under the stock bonus agreement shall be transferable by the Participant only upon such terms and conditions as are set forth in the stock bonus agreement, as the Board shall determine in its discretion, so long as stock awarded under the stock bonus agreement remains subject to the terms of the stock bonus agreement.

(b) Restricted Stock Awards. Each restricted stock purchase agreement shall be in such form and shall contain such terms and conditions as the Board shall deem appropriate. The terms and conditions of the restricted stock purchase agreements may change from time to time, and the terms and conditions of separate restricted stock purchase agreements need not be identical, but each restricted stock purchase agreement shall include (through incorporation of provisions hereof by reference in the agreement or otherwise) the substance of each of the following provisions:

(i) Purchase Price. The purchase price under each restricted stock purchase agreement shall be such amount as the Board shall determine and designate in such restricted stock purchase agreement. The purchase price shall not be less than one hundred percent (100%) of the stock's Fair Market Value on the date such award is made or at the time the purchase is consummated.

(ii) Consideration. The purchase price of stock acquired pursuant to the restricted stock purchase agreement shall be paid either: (i) in cash at the time of purchase; (ii) at the discretion of the Board, according to a deferred payment or other arrangement with the Participant; or (iii) in any other form of legal consideration that may be acceptable to the Board in its discretion.

(iii) Vesting. Shares of Common Stock acquired under the restricted stock purchase agreement may, but need not, be subject to a share repurchase option in favor of the Company in accordance with a vesting schedule to be determined by the Board.

(iv) Termination of Participant's Continuous Service. In the event a Participant's Continuous Service terminates, the Company may repurchase or otherwise reacquire any or all of the shares of Common Stock held by the Participant which have not vested as of the date of termination under the terms of the restricted stock purchase agreement.

(v) Transferability. Rights to acquire shares under the restricted stock purchase agreement shall be transferable by the Participant only upon such terms and conditions as are set forth in the restricted stock purchase agreement, as the Board shall determine in its discretion, so long as stock awarded under the restricted stock purchase agreement remains subject to the terms of the restricted stock purchase agreement.

8. Covenants of the Company.

(a) Availability of Shares. During the terms of the Stock Awards, the Company shall keep available at all times the number of shares of Common Stock required to satisfy such Stock Awards.

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(b) Securities Law Compliance. The Company shall seek to obtain from each regulatory commission or agency having jurisdiction over the Plan such authority as may be required to grant Stock Awards and to issue and sell shares of Common Stock upon exercise of the Stock Awards. If, after reasonable efforts, the Company is unable to obtain from any such regulatory commission or agency the authority which counsel for the Company deems necessary for the lawful issuance and sale of stock under the Plan, the Company shall be relieved from any liability for failure to issue and sell stock upon exercise of such Stock Awards unless and until such authority is obtained.

9. Use of Proceeds From Stock.

Proceeds from the sale of stock pursuant to Stock Awards shall constitute general funds of the Company.

10. Miscellaneous.

(a) Acceleration of Exercisability and Vesting. The Board shall have the power to accelerate the time at which a Stock Award may first be exercised or the time during which a Stock Award or any part thereof will vest in accordance with the Plan, notwithstanding the provisions in the Stock Award stating the time at which it may first be exercised or the time during which it will vest.

(b) Shareholder Rights. No Participant shall be deemed to be the holder of, or to have any of the rights of a holder with respect to, any shares subject to such Stock Award unless and until such Participant has satisfied all requirements for exercise of the Stock Award pursuant to its terms.

(c) No Employment or Other Service Rights. Nothing in the Plan or any instrument executed or Stock Award granted pursuant thereto shall confer upon any Participant or other holder of Stock Awards any right to continue to serve the Company or an Affiliate in the capacity in effect at the time the Stock Award was granted or shall affect the right of the Company or an Affiliate to terminate (i) the employment of an Employee with or without notice and with or without cause, (ii) the service of a Consultant pursuant to the terms of such Consultant's agreement with the Company or an Affiliate or (iii) the service of a Director pursuant to the Bylaws of the Company or an Affiliate, and any applicable provisions of the corporate law of the state in which the Company or the Affiliate is incorporated, as the case may be.

(d) Investment Assurances. The Company may require a Participant, as a condition of exercising or acquiring stock under any Stock Award, (i) to give written assurances satisfactory to the Company as to the Participant's knowledge and expert experience in financial and business matters and/or to employ a purchaser representative reasonably satisfactory to the Company who is knowledgeable and experienced in financial and business matters and that he or

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she is capable of evaluating, alone or together with the purchaser representative, the merits and risks of exercising the Stock Award; and (ii) to give written assurances satisfactory to the Company stating that the Participant is acquiring the stock subject to the Stock Award for the Participant's own account and not with any present intention of selling or otherwise distributing the stock. The foregoing requirements, and any assurances given pursuant to such requirements, shall be inoperative if (iii) the issuance of the shares upon the exercise or acquisition of stock under the Stock Award has been registered under a then currently effective registration statement under the Securities Act or
(iv) as to any particular requirement, a determination is made by counsel for the Company that such requirement need not be met in the circumstances under the then applicable securities laws. The Company may, upon advice of counsel to the Company, place legends on stock certificates issued under the Plan as such counsel deems necessary or appropriate in order to comply with applicable securities laws, including, but not limited to, legends restricting the transfer of the stock.

(e) Withholding Obligations. To the extent provided by the terms of a Stock Award Agreement, the Participant may satisfy any federal, state or local tax withholding obligation relating to the exercise or acquisition of stock under a Stock Award by any of the following means (in addition to the Company's right to withhold from any compensation paid to the Participant by the Company) or by a combination of such means: (i) tendering a cash payment; (ii) authorizing the Company to withhold shares from the shares of the Common Stock otherwise issuable to the Participant as a result of the exercise or acquisition of stock under the Stock Award; or (iii) delivering to the Company owned and unencumbered shares of the Common Stock.

11. Adjustments Upon Changes in Stock.

(a) Capitalization Adjustments. If any change is made in the stock subject to the Plan, or subject to any Stock Award, without the receipt of consideration by the Company (through merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, stock split, liquidating dividend, combination of shares, exchange of shares, change in corporate structure or other transaction not involving the receipt of consideration by the Company), the Plan will be appropriately adjusted in the class(es) and maximum number of securities subject to the Plan pursuant to subsection 4(a) and the outstanding Stock Awards will be appropriately adjusted in the class(es) and number of securities and price per share of stock subject to such outstanding Stock Awards. The Board, the determination of which shall be final, binding and conclusive, shall make such adjustments. (The conversion of any convertible securities of the Company shall not be treated as a transaction "without receipt of consideration" by the Company.)

(b) Change in Control--Dissolution or Liquidation. In the event of a dissolution or liquidation of the Company, then such Stock Awards shall be terminated if not exercised (if applicable) prior to such event.

(c) Change in Control--Asset Sale, Merger, Consolidation or Reverse Merger.

(i) In the event of (1) a sale of substantially all of the assets of the Company, (2) a merger or consolidation in which the Company is not the surviving corporation or (3) a reverse merger in which the Company is the surviving corporation but the shares of Common Stock outstanding immediately preceding the merger are converted by virtue of the merger into other property, whether in the form of securities, cash or otherwise, then any surviving

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corporation or acquiring corporation shall assume any Stock Awards outstanding under the Plan or shall substitute similar stock awards (including an award to acquire the same consideration paid to the shareholders in the transaction described in this subsection 11(c) for those outstanding under the Plan).

(ii) For purposes of subsection 11(c) an Award shall be deemed assumed if, following the change in control, the Award confers the right to purchase in accordance with its terms and conditions, for each share of Common Stock subject to the Award immediately prior to the change in control, the consideration (whether stock, cash or other securities or property) to which a holder of a share of Common Stock on the effective date of the change in control was entitled.

(iii) In the event any surviving corporation or acquiring corporation refuses to assume such Stock Awards or to substitute similar stock awards for those outstanding under the Plan, then with respect to Stock Awards held by Participants whose Continuous Service has not terminated, the vesting of 50% of such Stock Awards (and, if applicable, the time during which such Stock Awards may be exercised) shall be accelerated in full, and the Stock Awards shall terminate if not exercised (if applicable) at or prior to such event. With respect to any other Stock Awards outstanding under the Plan, such Stock Awards shall terminate if not exercised (if applicable) prior to such event.

12. Amendment of the Plan and Stock Awards.

(a) Amendment of Plan. The Board at any time, and from time to time, may amend the Plan. However, except as provided in Section 11 relating to adjustments upon changes in stock, no amendment shall be effective unless approved by the shareholders of the Company to the extent shareholder approval is necessary to satisfy the requirements of Rule 16b-3 or any NASDAQ or securities exchange listing requirements.

(b) Shareholder Approval. The Board may, in its sole discretion, submit any amendment to the Plan for shareholder approval.

(c) No Impairment of Rights. Rights under any Stock Award granted before amendment of the Plan shall not be impaired by any amendment of the Plan unless
(i) the Company requests the consent of the Participant and (ii) the Participant consents in writing.

(d) Amendment of Stock Awards. The Board at any time, and from time to time, may amend the terms of any one or more Stock Awards; provided, however, that the rights under any Stock Award shall not be impaired by any such amendment unless (i) the Company requests the consent of the Participant and
(ii) the Participant consents in writing.

13. Termination or Suspension of the Plan.

(a) Plan Term. The Board may suspend or terminate the Plan at any time. Unless sooner terminated, the Plan shall terminate on the day before the tenth
(10th) anniversary of the date the Plan is adopted by the Board. No Stock Awards may be granted under the Plan while the Plan is suspended or after it is terminated.

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(b) No Impairment of Rights. Suspension or termination of the Plan shall not impair rights and obligations under any Stock Award granted while the Plan is in effect except with the written consent of the Participant.

14. Effective Date of Plan.

The Plan shall become effective as determined by the Board.

15. Choice of Law.

All questions concerning the construction, validity and interpretation of this Plan shall be governed by the law of the State of Washington, without regard to such states conflict of laws rules.

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F5 NETWORKS, INC.
NONQUALIFIED STOCK OPTION AGREEMENT

THIS NONQUALIFIED STOCK OPTION AGREEMENT (the "Agreement") is made and entered into as of October 23, 2000 (the "Grant Date") between F5 Networks, Inc., a Washington corporation (the "Company") and Jeff Pancottine ("Holder").

THE PARTIES AGREE AS FOLLOWS:

1. Grant of Option; Grant Date. The Company hereby grants to Holder, the right (the "Option") to purchase up to 200,000 shares of the Company's Common Stock (the "Option Shares"), 150,000 at a price per share of $33.00, and 50,000 at a price per share of $30.00 (the "Exercise Price"), on the terms and conditions set forth in this Agreement. This Option is not intended to qualify as an incentive stock option for purposes of Section 422 of the Code. The number and kind of Option Shares and the Exercise Price may be adjusted in certain circumstances in accordance with the provisions of Section 9 below.

2. Definitions. For purposes of this Agreement, the following terms shall be defined as set forth below:

2.1 Affiliate. "Affiliate" means any parent corporation or subsidiary corporation of the Company, whether now or hereafter existing.

2.2 Board. "Board" means the Board of Directors of the Company.

2.3 Code. "Code" means the Internal Revenue Code of 1986, as amended.

2.4 Common Stock. "Common Stock" means the common stock of the Company.

2.5 Continuous Service. "Continuous Service" means that Holder's service with the Company or an Affiliate, whether as an employee or consultant, is not interrupted or terminated. Holder's Continuous Service shall not be deemed to have terminated merely because of a change in the capacity in which Holder renders service to the Company or an Affiliate as an employee or consultant or a change in the entity for which Holder renders such service, provided that there is no interruption or termination of Holder's Continuous Service. For example, a change in status from an employee of the Company to a consultant of an Affiliate will not constitute an interruption of Continuous Service. The Board, in its sole discretion, may determine whether Continuous Service shall be considered interrupted in the case of any leave of absence approved by the Board, including sick leave, military leave or any other personal leave.

2.6 Disability. "Disability" means the permanent and total disability of Holder within the meaning of Section 22(e)(3) of the Code.


2.7 Expiration Date. "Expiration Date" means October 22, 2010.

2.8 Fair Market Value. "Fair Market Value" means, as of any date, the value of the Common Stock. If the Common Stock is listed on any established stock exchange or traded on the NASDAQ National Market or the NASDAQ Small Cap Market, the Fair Market Value of a share of Common Stock shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or market (or the exchange or market with the greatest volume of trading in the Common Stock) on the day of determination or, if the day of determination is not a market trading day, then on the last market trading day prior to the day of determination, as reported in The Wall Street Journal or such other source as the Board deems reliable. In the absence of such markets for the Common Stock, the Fair Market Value shall be determined in good faith by the Board.

2.9 Securities Act. "Securities Act" means the Securities Act of 1933, as amended.

2.10 Vesting Commencement Date. "Vesting Commencement Date" shall mean Holder's first day of continuous service with the Company.

3. Vesting. Subject to the limitations contained herein, the Option will vest and become exercisable with respect to 25% of the Option Shares on the first anniversary of the Vesting Commencement Date and with respect to the remaining Option Shares in equal monthly installments over the three years following the Vesting Commencement Date; provided that vesting will cease upon the termination of Holder's Continuous Service.

4. Method of Payment of the Exercise Price. Payment of the Exercise Price is due in full upon exercise of all or any part of the Option. Holder may elect to make payment of the Exercise Price in cash or by check or one or more of the following if the Company, in its sole discretion at the time the Option is exercised, is then offering such alternatives:

(a) Provided that at the time of exercise the Common Stock is publicly traded and quoted regularly in The Wall Street Journal, then pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board which, prior to the issuance of Common Stock, results in either the receipt of cash (or check) by the Company or the receipt of irrevocable instructions to pay the aggregate exercise price to the Company from the sales proceeds (a "cashless exercise").

(b) Provided that at the time of exercise the Common Stock is publicly traded and quoted regularly in The Wall Street Journal, then by delivery of already-owned shares of Common Stock (valued at their Fair Market Value on the date of exercise) if (i) either Holder has held the already-owned shares for the period required to avoid a charge to the Company's reported earnings (generally six months) or Holder did not acquire the already-owned shares, directly or indirectly from the Company and (ii) Holder owns the already-owned shares free and clear of any liens, claims, encumbrances or security interests. "Delivery" for these purposes, in the sole discretion of the Company at the time the Option is exercised, shall include delivery to the Company of Holder's attestation of ownership of such shares of Common Stock in a form approved by the Company.

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Notwithstanding the foregoing, the Option may not be exercised by tender to the Company of Common Stock to the extent such tender would constitute a violation of the provisions of any law, regulation or agreement restricting the redemption of the Company's stock.

(c) Provided there has been a change in control described in Section 9(c) and the surviving corporation or acquiring corporation refuses to assume the Option or to substitute a similar option for the Option, then by authorizing the Company to withhold shares from the shares of the Common Stock otherwise issuable to Holder as a result of the exercise of the Option. Notwithstanding the foregoing, the Option may not be exercised by withholding shares of Common Stock to the extent such withholding would constitute a violation of the provisions of any law, regulation or agreement restricting the redemption of the Company's stock.

5. Whole Shares. The Option may only be exercised for whole shares.

6. Securities Law Compliance. Notwithstanding anything to the contrary contained herein, the Option may not be exercised unless the shares issuable upon exercise of the Option are then registered under the Securities Act or, if such shares are not then so registered, the Company has determined that such exercise and issuance would be exempt from the registration requirements of the Securities Act. The exercise of the Option must also comply with other applicable laws and regulations governing the Option, and the Option may not be exercised if the Company determines that the exercise would not be in material compliance with such laws and regulations.

7. Term. The term of the Option commences on the Grant Date and expires upon the earliest of the following:

(a) three (3) months after the termination of Holder's Continuous Service for any reason other than death or Disability, provided that if during any part of such three-month period the Option is not exercisable solely because of the condition set forth in Section 6, the Option shall not expire until the earlier of the Expiration Date or until it shall have been exercisable for an aggregate period of three (3) months after the termination of Holder's Continuous Service;

(b) twelve (12) months after the termination of Holder's Continuous Service due to Disability;

(c) eighteen (18) months after Holder's death if Holder dies either during Holder's Continuous Service or within three (3) months after Holder's Continuous Service terminates for reason other than Cause;

(d) the Expiration Date; or

(e) the tenth (10th) anniversary of the Grant Date.

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8. Exercise.

(a) The vested portion of the Option may be exercised during its term by delivering a Notice of Exercise in the form attached hereto as Exhibit A, together with the Exercise Price (payable in the manner set forth in Section 4) to the Secretary of the Company, or to such other person as the Company may designate, during regular business hours, together with such additional documents as the Company may then require.

(b) By exercising the Option, Holder agrees that, as a condition to any exercise of the Option, the Company may require Holder to enter an arrangement providing for the payment by Holder to the Company of any tax withholding obligation of the Company arising by reason of (1) the exercise of the Option or (2) the disposition of shares acquired upon such exercise.

9. Adjustments Upon Changes in Stock.

(a) Capitalization Adjustments. If any change is made in the Common Stock without the receipt of consideration by the Company (through merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, stock split, liquidating dividend, combination of shares, exchange of shares, change in corporate structure or other transaction not involving the receipt of consideration by the Company), the number of Option Shares and the Exercise Price will be appropriately adjusted by the Board, whose determination shall be final, binding and conclusive. (The conversion of any convertible securities of the Company shall not be treated as a transaction "without receipt of consideration" by the Company.)

(b) Change in Control--Dissolution or Liquidation. In the event of a dissolution or liquidation of the Company, the Option shall be terminated if not exercised (if applicable) prior to such event.

(c) Change in Control--Asset Sale, Merger, Consolidation or Reverse Merger.

(i) The Option will immediately vest 50% in the event of a change in control of the Company consisting of: (1) a sale of substantially all of the assets of the Company, (2) a merger or consolidation in which the Company is not the surviving corporation or (3) a reverse merger in which the Company is the surviving corporation but the shares of Common Stock outstanding immediately preceding the merger are converted by virtue of the merger into other property, whether in the form of securities, cash or otherwise. If applicable, the time during which the Option may be exercised shall also be accelerated in full. The Option shall terminate if not exercised (if applicable) at or prior to such event, and any surviving corporation or acquiring corporation shall assume the remaining unvested portion of the Option or shall substitute a similar Option.

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(ii) For purposes of subsection 9(c) the Option shall be deemed assumed if, following the change in control, the Option confers the right to purchase, in accordance with its terms and conditions, for each share of Common Stock subject to the Option immediately prior to the change in control, the consideration (whether stock, cash or other securities or property) to which a holder of a share of Common Stock on the effective date of the change in control was entitled.

10. Transferability. The Option is not transferable, except by will or by the laws of descent and distribution, and is exercisable during Holder's life only by Holder. Notwithstanding the foregoing, by delivering written notice to the Company, in a form satisfactory to the Company, Holder may designate a third party who, in the event of Holder's death, shall thereafter be entitled to exercise the Option.

11. Not a Service Contract. This Agreement is not an employment or service contract, and nothing in this Agreement shall be deemed to create in any way whatsoever any obligation on Holder's part to continue in the employ of the Company, or of the Company to continue Holder's employment. In addition, nothing in this Agreement shall obligate the Company, its shareholders, Board, officers or employees to continue any relationship that Holder might have as a director or consultant for the Company.

12. Withholding Obligations.

(a) At the time the Option is exercised, in whole or in part, or at any time thereafter as requested by the Company, Holder hereby authorizes withholding from payroll and any other amounts payable to Holder, and otherwise agrees to make adequate provision for (including by means of a "cashless exercise" pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board to the extent permitted by the Company), any sums required to satisfy the federal, state, local and foreign tax withholding obligations of the Company, which arise in connection with the Option.

(b) The Option is not exercisable unless the tax withholding obligations of the Company are satisfied. Accordingly, Holder may not be able to exercise the Option when desired even though the Option is vested.

13. No Rights As A Shareholder. The Option shall not entitle the Holder to any cash dividend, voting or other right of a shareholder unless and until the date of issuance of the shares that are the subject of the Option.

14. Professional Advice. The acceptance and exercise of the Option and the sale of Option Shares has consequences under federal and state tax and securities laws which may vary depending upon the individual circumstances of the Holder. Accordingly, Holder acknowledges that he has been advised to consult his personal legal and tax advisor in connection with this Agreement and his dealings with respect to the Option and the Option Shares. Holder further

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acknowledges that the Company has made no warranties or representations to Holder with respect to the income tax consequences of the grant and exercise of the Option or the sale of the Option Shares and Holder is in no manner relying on the Company or its representatives for an assessment of such consequences.

15. Assignment; Binding Effect. Subject to the limitations set forth in this Agreement, this Agreement shall be binding upon and inure to the benefit of the executors, administrators, heirs, legal representatives, and successors of the parties hereto; provided, however, that Holder may not assign any of Holder's rights under this Agreement.

16. Damages. Holder shall be liable to the Company for all costs and damages, including incidental and consequential damages, resulting from a disposition of Option Shares which is not in conformity with the provisions of this Agreement.

17. Governing Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of Washington excluding those laws that direct the application of the laws of another jurisdiction.

18. Notices. All notices and other communications under this Agreement shall be in writing. Unless and until Holder is notified in writing to the contrary, all notices, communications, and documents directed to the Company and related to the Agreement, if not delivered by hand, shall be mailed, addressed as follows:

F5 Networks, Inc. 501 Elliott Ave West Seattle, WA 98119

Unless and until the Company is notified in writing to the contrary, all notices, communications, and documents intended for Holder and related to this Agreement, if not delivered by hand, shall be mailed to Holder's last known address as shown on the Company's books. Notices and communications shall be mailed by first class mail, postage prepaid. All mailings and deliveries related to this Agreement shall be deemed received when actually received, if by hand delivery, and five (5) business days after mailing, if by mail.

19. Amendment of this Agreement. The Board at any time, and from time to time, may amend the terms of this Agreement; provided, however, that the rights under this Agreement shall not be impaired by any such amendment unless (i) the Company requests the consent of the Holder and (ii) Holder consents in writing.

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IN WITNESS WHEREOF, the parties have executed this Option Agreement as of the Effective Date.

F5 NETWORKS, INC.

By

Title

Holder hereby accepts and agrees to be bound by all of the terms and conditions of this Agreement.

Holder


Jeff Pancottine

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EXHIBIT A

NOTICE OF EXERCISE

(To be signed only upon exercise of Option)

To: F5 Networks, Inc.
501 Elliott Ave West
Seattle, WA 98119

The undersigned, the holder of an option to purchase shares of common stock of F5 Networks, Inc. pursuant to an Option Agreement dated as of __________ __, ____ (the "Option Agreement") hereby irrevocably elects to exercise the purchase right represented by the Option Agreement for, and to purchase under that Option Agreement, __________ shares of Common Stock and herewith makes payment of $_____________ for those shares and payment of $___________ for holder's share of withholding and employment taxes resulting from such exercise. Holder hereby confirms the representations, warranties and agreements set forth in the Option Agreement.

DATED: __________________, ____.

HOLDER:

By:

Title:

ADDRESS:





Consent of Independent Accountants

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 of our report dated October 27, 2000, relating to the consolidated financial statements and financial statement schedule, which appear in F5 Networks, Inc.'s Annual Report on Form 10-K for the year ended September 30, 2000.

PricewaterhouseCoopers LLP
Seattle, Washington
December 13, 2000