sufficient additional capital, NRx Pharmaceuticals may be compelled to reduce the scope of its operations and planned capital expenditures.
The Company sold 3,238,338 and 3,642,515 shares of common stock during the three and nine months ended September 30, 2021, respectively, generating gross proceeds of $31,134,816 and $39,624,175, respectively.
The Company issued 2,334,370 and 3,830,586 shares of common stock pursuant to warrants and Unit Purchase Options exercised during the three and nine months ended September 30, 2021, and received gross proceeds from the warrant exercise of $9,199,471 and $16,699,489, respectively. The Company issued 634,045 and 834,045 shares of common stock for consulting services during the three and nine months ended September 30, 2021, respectively.
The Company sold 292,534 and 343,378 shares of common stock during the three and nine months ended September 30, 2020 and received gross proceeds of $1,412,067 and $1,589,092, respectively.
The Company issued 1,138,199 shares of common stock to settle the notes conversion during the three and nine months ended September 30, 2020 and recorded a loss of $306,641.
Cash Flow Summary for the nine months ended September 30, 2021 and 2020
The following table shows a summary of NRx Pharmaceuticals' cash flows for each of the periods shown below:
| | | | | | |
| | Nine months ended September 30, |
| | 2021 (As restated) | | 2020 |
|
| | (Unaudited) |
Net cash used in operating activities | | $ | (26,423,097) | | $ | (1,858,294) |
Net cash used in investing activities | | | (6,612) | | | — |
Net cash provided by financing activities | | | 63,454,765 | | | 2,268,630 |
Net increase (decrease) in cash | | $ | 37,025,056 | | $ | 410,336 |
Operating activities
During the nine months ended September 30, 2021, operating activities used $26,423,097 of cash, primarily resulting from a net loss of $62,655,819, reduced by non-cash charges of $40,192,959, including $21,365,641 of non-cash settlement expense related to the GEM Warrant, $12,775,511 of non-cash consulting fees paid in common stock, $6,214,853 of stock-based compensation expense and $763,043 change in fair value of earn out liability, partially offset by $822,539 of gain from the change in fair value of warrant liabilities, $120,810 of gain on the extinguishment of debt; and a decrease in operating assets and liabilities of $3,960,237.
During the nine months ended September 30, 2020, operating activities used $1,858,294 of cash, primarily resulting from a net loss of $6,649,481, reduced by non-cash charges of $3,449,286, including $2,689,684 of warrant expense for warrants issued to board members for services, $306,641 of loss on conversion of notes payable, $373,018 of stock-based compensation expense, $35,198 of non-cash interest expense, and $16,475 of amortization of debt discount.
Investing activities
During the nine months ended September 30, 2021, investing activities used $6,612 of cash, primarily resulting from the purchase of computer equipment.
There were no investing activities for the nine months ended September 30, 2020.
Financing activities
During the nine months ended September 30, 2021, financing activities provided $63,454,765 of cash, primarily resulting from $27,358,223 from the issuance of common stock and preferred investment options in private placement, $16,699,489 from the issuance of common stock for the exercise of the GEM Warrants, and $11,049,628 for the effect of the Merger, net of transaction costs, and $9,623,899 from the issuance of shares of NRx Pharmaceuticals common stock, partially