Document:

Model Stock Option Agreement--Public Delaware Corporation

Exhibit 10.24

CoTherix, Inc. 2004 Equity Incentive Plan

Notice of Stock Option Grant

You have been granted the following option to purchase shares of the Common Stock of CoTherix, Inc. (the "Company"):

Name of Optionee:[Name]

Total Number of Shares:[TotalShares]

Type of Option:[ISO] Incentive Stock Option

[NSO] Nonstatutory Stock Option

Exercise Price Per Share:$[PricePerShare]

Date of Grant:[DateGrant]

Vesting Commencement Date:[VestDay]

Vesting Schedule:This option becomes exercisable with respect to the first 25% of the Shares subject to this option when you complete 12 months of continuous "Service" (as defined in the Plan) from the Vesting Commencement Date.  Thereafter, this option becomes exercisable with respect to an additional 2.08333% of the Shares subject to this option when you complete each month of Service.

Expiration Date:[ExpDate].  This option expires earlier if your Service terminates earlier, as described in the Stock Option Agreement.

You and the Company agree that this option is granted under and governed by the terms and conditions of the 2004 Equity Incentive Plan (the "Plan") and the Stock Option Agreement, both of which are attached to and made a part of this document.

You further agree that the Company may deliver by email all documents relating to the Plan or this option (including, without limitation, prospectuses required by the Securities and Exchange Commission) and all other documents that the Company is required to deliver to its security holders (including, without limitation, annual reports and proxy statements).  You also agree that the Company may deliver these documents by posting them on a web site maintained by the Company or by a third party under contract with the Company.  If the Company posts these documents on a web site, it will notify you by email.

Optionee:

CoTherix, Inc.

By:

Title:

CoTherix, Inc. 2004 Equity Incentive Plan

Stock Option Agreement

	

Tax Treatment
	

This option is intended to be an incentive stock option under section 422 of the Internal Revenue Code or a nonstatutory stock option, as provided in the Notice of Stock Option Grant.

	

Vesting
	

This option becomes exercisable in installments, as shown in the Notice of Stock Option Grant.  

	 	

If the Company is subject to a Change in Control before your Service with the Company terminates, then this option will become exercisable with respect to 50% of the then unvested option Shares.

If you are subject to an Involuntary Termination within 12 months after the Change in Control, then this option will become exercisable in full with respect to all of the option Shares.

	 	

This option will in no event become exercisable for additional shares after your Service has terminated for any reason.

	

Term
	

This option expires in any event at the close of business at Company headquarters on the day before the 10th anniversary of the Date of Grant, as shown in the Notice of Stock Option Grant.  (It will expire earlier if your Service terminates, as described below.)

	

Regular Termination
	

If your Service terminates for any reason except death or total and permanent disability, then this option will expire at the close of business at Company headquarters on the date ninety (90) days after your termination date.  The Company determines when your Service terminates for this purpose.

	

Death
	

If you die before your Service terminates, then this option will expire at the close of business at Company headquarters on the date that is the first anniversary of the date of death.

	

Disability
	

If your Service terminates because of your total and permanent disability, then this option will expire at the close of business at Company headquarters on the date that is one hundred and eighty (180) days after your termination date.

For all purposes under this Agreement, "total and permanent disability" means that you are unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted, or can be expected to last, for a continuous period of not less than one year.

	

Leaves of Absence and Part-Time Work
	

For purposes of this option, your Service does not terminate when you go on a military leave, a sick leave or another bona fide leave of absence, if the leave was approved by the Company in writing and if continued crediting of Service is required by the terms of the leave or by applicable law.  However, your Service terminates when the approved leave ends, unless you immediately return to active work for the Company.

If you go on a leave of absence, then the vesting schedule specified in the Notice of Stock Option Grant may be adjusted in accordance with the Company's leave of absence policy or the terms of your leave.  If you commence working on a part-time basis, then the vesting schedule specified in the Notice of Stock Option Grant may be adjusted in accordance with the Company's part-time work policy or the terms of an agreement between you and the Company pertaining to your part-time schedule.

	

Restrictions on Exercise
	

The Company will not permit you to exercise this option if the issuance of shares at that time would violate any law or regulation.

	

Notice of Exercise
	

When you wish to exercise this option, you must notify the Company by filing the proper "Notice of Exercise" form at the address given on the form.  Your notice must specify how many shares you wish to purchase.  Your notice must also specify how your shares should be registered.  The notice will be effective when the Company receives it.

If someone else wants to exercise this option after your death, that person must prove to the Company's satisfaction that he or she is entitled to do so.

	

Form of Payment
	

When you submit your notice of exercise, you must include payment of the option exercise price for the shares that you are purchasing.  To the extent permitted by applicable law, payment may be made in one (or a combination of two or more) of the following forms:

 

1.  Your personal check, a cashier's check or a money order.

 

2.  Certificates for shares of Company stock that you own, along with any forms needed to effect a transfer of those shares to the Company.  The value of the shares, determined as of the effective date of the option exercise, will be applied to the option exercise price.  Instead of surrendering shares of Company stock, you may attest to the ownership of those shares on a form provided by the Company and have the same number of shares subtracted from the option shares issued to you.  However, you may not surrender, or attest to the ownership of, shares of Company stock in payment of the exercise price if your action would cause the Company to recognize compensation expense (or additional compensation expense) with respect to this option for financial reporting purposes.

3.  Irrevocable directions to a securities broker approved by the Company to sell all or part of your option shares and to deliver to the Company from the sale proceeds an amount sufficient to pay the option exercise price and any withholding taxes.  (The balance of the sale proceeds, if any, will be delivered to you.)  The directions must be given by signing a special "Notice of Exercise" form provided by the Company.

4.  Irrevocable directions to a securities broker or lender approved by the Company to pledge option shares as security for a loan and to deliver to the Company from the loan proceeds an amount sufficient to pay the option exercise price and any withholding taxes.  The directions must be given by signing a special "Notice of Exercise" form provided by the Company.

	

Withholding Taxes and Stock Withholding
	

You will not be allowed to exercise this option unless you make arrangements acceptable to the Company to pay any withholding taxes that may be due as a result of the option exercise.  With the Company's consent, these arrangements may include withholding shares of Company stock that otherwise would be issued to you when you exercise this option.  The value of these shares, determined as of the effective date of the option exercise, will be applied to the withholding taxes.

	

Restrictions on Resale
	

You agree not to sell any option shares at a time when applicable laws, Company policies or an agreement between the Company and its underwriters prohibit a sale.  This restriction will apply as long as your Service continues and for such period of time after the termination of your Service as the Company may specify.

	

Transfer of Option
	

Prior to your death, only you may exercise this option.  You cannot transfer or assign this option.  For instance, you may not sell this option or use it as security for a loan.  If you attempt to do any of these things, this option will immediately become invalid.  You may, however, dispose of this option in your will or a beneficiary designation.

	 	

Regardless of any marital property settlement agreement, the Company is not obligated to honor a notice of exercise from your former spouse, nor is the Company obligated to recognize your former spouse's interest in your option in any other way.

	

Retention Rights
	

Your option or this Agreement does not give you the right to be retained by the Company or any subsidiary of the Company in any capacity.  The Company and its subsidiaries, if any, reserve the right to terminate your Service at any time, with or without cause.

	

Stockholder Rights
	

You, or your estate or heirs, have no rights as a stockholder of the Company until you have exercised this option by giving the required notice to the Company and paying the exercise price.  No adjustments are made for dividends or other rights if the applicable record date occurs before you exercise this option, except as described in the Plan.

	

Adjustments
	

In the event of a stock split, a stock dividend or a similar change in Company stock, the number of shares covered by this option and the exercise price per share may be adjusted pursuant to the Plan.

	

Applicable Law
	

This Agreement will be interpreted and enforced under the laws of the State of Delaware (without regard to its choice-of-law provisions that would require the application of the law of any other jurisdiction).

	

The Plan and Other Agreements
	

The text of the Plan is incorporated in this Agreement by reference.  Capitalized terms not otherwise defined in this Agreement shall be defined as set forth in the Plan.

This Agreement and the Plan constitute the entire understanding between you and the Company regarding this option.  Any prior agreements, commitments or negotiations concerning this option are superseded.  This Agreement may be amended only by another written agreement between the parties.

By signing the cover sheet of this Agreement, you agree to all of the terms and conditions described above and in the Plan.March __, 2005

Exhibit 10.1

[SILICON VALLEY BANK LETTERHEAD]

March 11, 2005

Mr. Thomas L. Cronan

Redback Networks Inc.

300 Holger Way

San Jose, CA 95134

Re:  Amended and Restated Loan and Security Agreement entered into on June 15, 2004 between Silicon Valley Bank ("Bank") and Redback Networks Inc. ("Borrower"), amending and restating that certain Loan and Security Agreement dated as of March 10, 2004 (the "Original Agreement") between Bank and Borrower (as further amended to date, the "Loan Agreement")

Dear Mr. Cronan:

As we discussed, Bank and Borrower desire to amend the Loan Agreement to clarify and correct the intentions and understandings of the parties as of the effective date of the Original Agreement with respect to certain terms and conditions thereof relating to Sublimits made available to Borrower under the Loan Agreement.  On the terms and conditions set forth in this letter of amendment (this "Amendment"), Bank is willing to amend the Loan Agreement, effective as of the date of the Original Agreement.  

1.Section 1 ("Credit Limit") of the Schedule to the Loan Agreement is amended by adding the following to the end of such Section:

"Notwithstanding anything to the contrary in this Section 1, the requirements with respect to the availability of the Cash Management Services Sublimit, the Foreign Exchange Contract Sublimit, the Letter of Credit Sublimit and the Overadvance Sublimit that the Borrower maintain with Bank unrestricted cash balances shall not be applicable unless the First Reset Conditions are in effect.  Borrower has no availability under such Sublimits at any time the Second Reset conditions are in effect."

2.Section 1 ("Credit Limit") of the Schedule to the Loan Agreement is further amended by adding the following to the end of the portion thereof titled "Permitted Overadvances":

"Notwithstanding anything in this section to the contrary, if a Permitted Overadvance or Increased Permitted Overadvance is outstanding, Bank may demand that Borrower either (a) pay the amount of the Overadvance to Bank, or (b) permit Bank to restrict the use by Borrower of cash or securities on deposit with Bank in an amount equal to the Overadvance, which cash or securities shall be held as Collateral for all purposes of this Agreement, and Borrower shall take such action upon demand of Bank."

When duly executed by both Bank and Borrower, this Amendment shall be effective as of March 10, 2004.  This Amendment is limited precisely as written and shall not be deemed (a) to be a waiver or modification of any other term or condition of the Loan Agreement or of any other instrument or agreement referred to therein or to prejudice any right or remedy which Bank may now have or may have in the future under or in connection with the Loan Agreement or any instrument or agreement referred to therein; or (b) to be a consent to any future amendment or modification or waiver to any instrument or agreement the execution and delivery of which is consented to hereby, or to any waiver of any of the provisions thereof.  Except as expressly amended hereby, the Loan Agreement shall continue in full force and effect.

This Amendment may be signed in any number of counterparts, and by different parties hereto in separate counterparts, with the same effect as if the signatures to each such counterpart were upon a single instrument.  All counterparts shall be deemed an original of this Amendment.

THIS AMENDMENT SHALL BE GOVERNED BY AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA.

Silicon Valley Bank

By:

Printed Name:

Title:

 

ACKNOWLEDGED AND AGREED:

Redback Networks Inc., a Delaware corporation

By: 

Printed Name: 

Title:

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