The following table summarizes our cash flows for each of the unaudited nine months periods ended September 30, 2021 and 2020 (in thousands):
| | | | | | |
| | For the Nine Months Ended |
| | September 30, |
| | 2021 | | 2020 |
Net cash used in operating activities | | € | (19,427) | | € | (1,914) |
Net cash used in investing activities | | | (36,792) | | | (378) |
Net cash provided by financing activities | | | 129,171 | | | 16,053 |
Net increase in cash and cash equivalents | | € | 72,952 | | € | 13,761 |
Cash Flows Used in by Operating Activities
Net cash used in operating activities for the nine months ended September 30, 2021 was €19.4 million compared to net cash used in operating activities of €1.9 million for the nine months ended September 30, 2020. The increase was primarily due to an increase in loss before income tax of €19.2 million, partially offset by an increase of €2.1 million of increased operating expenses including share-based compensation, depreciation, lease amortization and foreign currency exchange and a decrease in changes in working capital of €0.4 million.
Cash Flows Used in Investing Activities
Cash flows used in investing activities for the nine months ended September 30, 2021 were €36.8 million compared to €0.4 million for the nine months ended September 30, 2020. During the nine months ended September 30, 2021, we purchased €36.3 million in investments in debt securities. We also made equipment purchases of €0.5 million and €0.4 million for the nine months ended September 30, 2021 and 2020, respectively.
Cash Flows Provided by Financing Activities
Cash flows provided by financing activities for the nine months ended September 30, 2021 of €129.2 million were primarily comprised of net proceeds from our IPO, including the exercise of the underwriters’ over-allotment option of €81.2 million, net proceeds from the Series C financing of €51.8 million and proceeds from borrowings of €0.6 million, less payment of €4.6 million for the Series A share repurchases.
Cash flows provided by financing activities for the nine months ended September 30, 2020 of €16.1 million was primarily related to net proceeds from our Series C preferred financing of €18.9 million and proceeds from debt borrowings of €1.3 million, offset by Series A preferred payments and common stock repurchases of €4.1 million.
Off-Balance Sheet Arrangements
We have not entered into any off-balance sheet arrangements or any holdings in variable interest entities.
Qualitative Disclosures about Market Risk
Our activities expose us to the financial risks of changes in foreign currency exchange rates and interest rates. We are exposed to a variety of risks in the ordinary course of our business, including, but not limited to, foreign currency risk and interest rate risk. We regularly assess each of these risks to minimize any adverse effects on our business as a result of those factors.
Foreign Currency Risk
We are exposed to foreign exchange risk arising from various currency exposures, primarily with respect to the U.S. Dollar. We have received payments in U.S. Dollars under our collaborations and the proceeds from our initial public offering in March 2021 was in U.S. Dollars. We regularly assess our foreign currency risk, maintain cash positions in the currencies in which we expect to incur the majority of our future expenses and may engage in hedging activities consistent with our investment policy to minimize this risk and preserve our capital.