As a result, these stockholders will have significant influence over matters submitted to our stockholders for approval, including the election of directors and the approval of any merger, consolidation or sale of all or substantially all of our assets. This concentration of voting power might delay, defer or prevent a change in control or delay or prevent a merger, consolidation, takeover or other business combination involving us on terms that other stockholders may desire, which, in each case, could adversely affect the market price of our Class A common stock.
Substantial sales of shares of our Class A common stock could cause the market price of our Class A common stock to decline and/or result in dilution to our stockholders.
Sales of a substantial number of shares of our Class A common stock in the public market, or the perception that these sales might occur, could reduce the market price of our Class A common stock and could impair our ability to raise capital through the sale of additional equity or other securities. We are unable to predict the effect that such sales may have on the prevailing market price of our Class A common stock.
As of October 15 2022, an aggregate of 1,903,970 shares of our common stock remained available for future grants under our equity incentive plans. Shares registered under our registration statements on Form S-8 are available for sale in the public market subject to vesting arrangements and exercise of options, and the restrictions of Rule 144 under the Securities Act of 1933, or the Securities Act. If these additional shares are sold, or if it is perceived that they will be sold, in the public market, the trading price of our Class A common stock could decline.
Additionally, as of October 15, the holders of an aggregate of approximately 18.4 million registrable securities have rights, subject to certain conditions, to include their securities in registration statements that we may file for ourselves or other stockholders. If we were to register these securities for resale, they could be freely sold in the public market. If these additional securities are sold, or if it is perceived that they will be sold, in the public market, the trading price of our Class A common stock could decline.
In connection with the amendment to our prior senior secured term loan, on the first day of each quarter that our senior secured notes was outstanding, beginning on or after July 1, 2021, we were obligated to issue warrants to the lenders to purchase such number of shares of Class A common stock as equals 0.50% of the then outstanding shares of our common stock on a fully-diluted basis and we are required to file a registration statement with the SEC to register for resale the shares of Class A common stock underlying the warrants. Pursuant to this obligation, on July 1, 2021, we issued warrants to the lenders exercisable for an aggregate of 130,350 shares of Class A common stock, on October 1, 2021, we issued warrants to the lenders exercisable for an aggregate of 133,868 shares of Class A common stock, on January 1, 2022 for an aggregate of 224,516 shares of Class A common stock, and on April 1, 2022 for an aggregate of 236,016 shares of Class A common stock; all such warrants have been fully exercised, and a total of 724,750 shares have been issued to the lenders upon such exercises. We filed registration statements for the resale of such shares with the SEC on July 30, 2021, October 15, 2021, January 14, 2022, and April 15, 2022, respectively.
On September 15, 2021, in connection with the private placement with Mr. M. Salzberg pursuant to the September Purchase Agreement, we issued to Mr. M. Salzberg (i) 300,000 shares of Class A common stock, (ii) warrants to purchase 240,000 shares of Class A common stock at an exercise price of $15.00 per share, (iii) warrants to purchase 120,000 shares of Class A common stock at an exercise price of $18.00 per share, and (iv) warrants to purchase 60,000 shares of Class A common stock at an exercise price of $20.00 per share, for an aggregate purchase price of $3.0 million.
On November 4, 2021, in connection with the Purchase Agreement and concurrently with the closing of the rights offering, we issued to RJB an aggregate of (i) 6,265,813 shares of Class A common stock, (ii) warrants to purchase 5,012,354.58219726 shares of Class A common stock at an exercise price of $15.00 per share, (iii) warrants to purchase 2,506,177.291098630 shares of Class A common stock at an exercise price of $18.00 per share, and (iv) warrants to purchase 1,253,088.645549316 shares of Class A common stock at an exercise price of $20.00 per share, for an aggregate purchase price of $62.7 million in two private placements. On November 4, 2021, we entered into a registration rights agreement with RJB and Mr. M. Salzberg, pursuant to which RJB, Mr. M. Salzberg and their respective permitted transferees have the right to request that we file a shelf registration statement with respect to all or a portion of the shares that they hold, which include (x) shares of Class A common stock held prior to the execution of the