On February 9, 2022, the Company’s board of directors adopted the Rhythm Pharmaceuticals, Inc. 2022 Employment Inducement Plan or the Inducement Plan, without stockholder approval pursuant to Rule 5635(c)(4) of the Nasdaq Stock Market LLC listing rules or Rule 5635(c)(4). In accordance with Rule 5635(c)(4), awards under the Inducement Plan may only be made to a newly hired employee who has not previously been a member of the Company’s board of directors, or an employee who is being rehired following a bona fide period of non-employment by the Company or a subsidiary, as a material inducement to the employee’s entering into employment with the Company or its subsidiary. An aggregate of 1,000,000 shares of the Company’s common stock have been reserved for issuance under the Inducement Plan. The Company will continue to grant awards under the 2017 Plan pursuant to the terms thereof.
The exercise price of stock options granted under the Inducement Plan will not be less than the fair market value of a share of the Company’s common stock on the grant date. Other terms of awards, including vesting requirements, are determined by the Company’s board of directors and are subject to the provisions of the Inducement Plan. Stock options granted to employees generally vest over a four-year period but may be granted with different vesting terms. Certain options may provide for accelerated vesting in the event of a change in control. Stock options granted under the Inducement Plan expire no more than 10 years from the date of grant. As of June 30, 2022, 60,565 stock option awards have been issued under the Inducement Plan. As of June 30, 2022, 30,295 restricted stock unit awards have been granted under the Inducement Plan. As of June 30, 2022, 909,140 shares of common stock are available for future grant under the Inducement Plan.
On November 2, 2021, the Company entered into a sales agreement, or the Sales Agreement, with Cowen and Company LLC, or Cowen, as sales agent, pursuant to which the Company may, from time to time, issue and sell common stock with an aggregate value of up to $100,000 in "at-the-market" offerings, or the ATM. Sales of common stock, if any, pursuant to the Sales Agreement, may be made in sales deemed to be an “at the market offering” as defined in Rule 415(a) of the Securities Act, including sales made directly through The Nasdaq Global Market or on any other existing trading market for Company’s common stock. As of June 30, 2022, there was $100,000 of common stock remaining available for sale under the ATM.
On February 9, 2021 the Company completed a public offering of 5,750,000 shares of common stock at an offering price of $30.00 per share, which included the exercise in full by the underwriters of their option to purchase up to 750,000 additional shares of common stock. The Company received $161,731 in net proceeds after deducting underwriting discounts, commissions and offering expenses.
9. Related-Party Transactions
Expenses paid directly to consultants and vendors considered to be related parties amounted to $498, $487, $978 and $1,097 for the three and six months ended June 30, 2022 and 2021, respectively. Outstanding payments due to these related parties as of June 30, 2022 and December 31, 2021 were $66 and $50, respectively, and were included within accounts payable on the balance sheet.
10. Long-Term Obligations
On June 16, 2022, we entered into a RIFA with entities managed by HealthCare Royalty Management, LLC, collectively referred to as the Investors. Pursuant to the RIFA and subject to customary closing conditions, the Investors have agreed to pay the Company an aggregate investment amount of up to $100,000, or the Investment Amount. Under the terms of the RIFA, we received $37,500 on June 29, 2022 upon FDA approval of IMCIVREE in BBS, referred to as the Initial Investment Amount, and are entitled to receive an aggregate of up to an additional $37,500 of the Investment Amount fifteen business days after IMCIVREE receives EMA approval in BBS, and a remaining $25,000 of the Investment Amount forty-five business days following achievement of a specified amount of cumulative net sales of IMCIVREE between July 1, 2022 and September 30, 2023.
As consideration for the Investment Amount and pursuant to the RIFA, we agreed to pay the Investors a tiered royalty on our annual net revenues, or Revenue Interest, including worldwide net product sales and upfront payments and milestones. The applicable tiered percentage will initially be 11.5% on annual net revenues up to $125,000, 7.5% on annual