exhibit 10. 6 400 east jamie court. suite 102 south san francisco, ca 94080 phone ( 650 ) 741 · 0900 fax ( 650 ) 741 · 0901 myokardia. com october 20, 2014 steven chan dear steven, we are pleased to offer you the position of vice president, corporate controller with myokardia, inc. your compensation will be $ 9, 166. 67, semi - monthly, which is equal to $ 220, 000. 00 annualized, payable in accordance with the company ’ s standard payroll schedule. this position will report to jake bauer, vice president, business development and business operations. this is a full - time position. while you render services to the company, you will not engage in any other employment, consulting or other business activity ( whether full - time or part - time ) that would create a conflict of interest with the company. by signing this letter, you confirm to the company that you have no contractual commitments or other legal obligations that would prohibit you from performing your duties for the company. cash compensation : this salary will be subject to adjustment pursuant to the company ’ s employee compensation policies in effect from time to time. in addition, the company has recently implemented a performance - based variable cash bonus program. subject to an acceptable level of corporate performance, the board of directors may approve payment of performance bonuses after the first of the year. if bonuses are paid, your target percentage will be 25 % of your salary as the basis for calculating your bonus. your actual bonus will depend on your own and the company ’ s performance for the year just completed. bonuses will be pro - rated for partial years of service. employee benefits : as a regular employee of the company, you will be eligible to participate in a number or company - sponsored benefits. in addition, you will be entitled to 20 days of paid time off in accordance with the company ’ s policy. a full list of company benefit can be found online at https : / / pcms. plansource. com. stock options : subject to the approval of the company ’ s board of directors or its compensation committee, you will be granted an option to purchase 150, 000 shares of the company ’ s common stock. the board of directors or the compensation committee will determine the exercise price per share when the option is granted. the option will be subject to the terms and conditions applicable to options granted under the company ’ s stock plan ( the “