Our cash and cash equivalents balances generally exceed Federal Deposit Insurance Corporation insured limits. We place our cash and cash equivalents in what we believe to be credit-worthy financial institutions. In addition, certain of our money market accounts invest in U.S. Treasury securities or other obligations issued or guaranteed by the U.S. government or its agencies, floating rate and variable demand notes of U.S. and foreign corporations, commercial paper rated in the highest category by Moody’s Investor Services and Standard & Poor’s, certificates of deposit and time deposits, asset-backed securities, and repurchase agreements.
As of June 30, 2023, we had total debt outstanding (net of original issue discount and deferred financing costs) of $978.1 million and net debt to total capitalization of 30.0%, compared with 33.3% at December 31, 2022.
Sources, Uses and Management of Capital
During 2022, as the tanker cycle recovered from the historical lows of 2021, we increased our overall liquidity with vessel sales, a refinancing that increased the capacity of our revolving credit and cash from operations. With strong market conditions continuing in 2023, we have used incremental liquidity generated from operations to invest in the fleet, reduce debt levels and make returns to shareholders.
In addition to future operating cash flows, our other future sources of funds are proceeds from issuances of equity securities, additional borrowings as permitted under our loan agreements and proceeds from the opportunistic sales of our vessels. Our current uses of funds are to fund working capital requirements, maintain the quality of our vessels, purchase vessels, pay newbuilding construction costs, comply with international shipping standards and environmental laws and regulations, repay or repurchase our outstanding loan facilities, pay a regular quarterly cash dividend, and from time to time, repurchase shares of our common stock and pay supplemental cash dividends.
The following is a summary of the significant capital allocation activities the Company executed during the first six months of 2023 and sources of capital the Company has at its disposal for future use as well as the Company’s current commitments for future uses of capital:
On February 27, 2023, the Company’s Board of Directors declared a regular quarterly cash dividend of $0.12 per share of common stock and a supplemental cash dividend of $1.88 per share of common stock. Pursuant to such dividend declarations, the Company made dividend payments totaling $98.3 million on March 28, 2023. On May 4, 2023, the Company’s Board of Directors declared a regular quarterly cash dividend of $0.12 per share of common stock and a supplemental dividend of $1.50 per share of common stock. Pursuant to such dividend declarations, the Company made dividend payments totaling $79.3 million on June 28, 2023. On August 8, 2023, the Company’s Board of Directors declared a regular quarterly cash dividend of $0.12 per share of common stock and a supplemental dividend of $1.30 per share of common stock. Both dividends will be paid on September 27, 2023 to stockholders of record as of September 13, 2023.
During the three months ended June 30, 2023, the Company repurchased and retired 366,483 shares of its common stock in open-market purchases, at an average price of $38.03 per share, for a total cost of $13.9 million. In August 2023, the Company’s Board of Directors authorized an increase in the share repurchase program to $50.0 million from $26.1 million.
In December 2022 the Company tendered notice of its intention to exercise its options to purchase two 2009-built Aframaxes that it had been bareboat chartering-in. The aggregate purchase price for the two vessels was $43.0 million, representing an approximately 45% discount to the market price of the vessels. The first of the two vessels was purchased in March 2023, and the second in early April 2023.
On March 10, 2023 the Company entered into an amendment to the $750 Million Credit Facility agreement. Pursuant to the amendment, the Company (a) prepaid $97 million of outstanding principal under the $750 Million Facility Term Loan; (b) obtained a release of collateral vessel mortgages over 22 MR product carriers; and (c) received from the lenders additional revolving credit commitments in an aggregate amount of $40 million, which additional commitments constitute an increase to, and are subject to the same terms and conditions as, the previously-existing revolving credit commitments. Following the effectiveness of the amendment, the aggregate principal commitments available under the $750 Million Facility Revolving Loan was $257.4 million (none of which