Series B preferred stock dividends
Dividends recorded on our Series B Preferred Stock were $1.6 million for each of the six month periods ended April 30, 2024 and 2023.
Net loss attributable to noncontrolling interests
For the six months ended April 30, 2024 and 2023, net loss attributable to noncontrolling interest totaled $3.3 million and $2.9 million, respectively, for the Groton Project tax equity financing transaction with East West Bank.
For the six months ended April 30, 2024 and 2023, net (loss) income attributable to noncontrolling interest totaled ($0.1) million and $0.8 million, respectively, for the LIPA Yaphank Project tax equity financing transaction with REI.
For the six months ended April 30, 2024, net loss attributable to noncontrolling interest totaled $26.8 million for the Derby Projects tax equity financing transaction with Franklin Park. The loss is primarily driven by the Investment Tax Credit (“ITC”) attributable to the noncontrolling interest for the 2023 tax year. The ITC reduces the noncontrolling interest’s claim on hypothetical liquidation proceeds in the HLBV waterfall and is nonrecurring. The loss also is a result of accelerated depreciation allocated to the noncontrolling interest under the HLBV method. The above noted items resulted in a reduction in liquidation proceeds which drove the loss in the six months ended April 30, 2024. There was no comparable net loss for the six months ended April 30, 2023, as the Derby Projects began operations in the first quarter of fiscal year 2024.
Net loss attributable to common stockholders and net loss per common share
Net loss attributable to common stockholders represents the net loss for the period less the preferred stock dividends on the Series B Preferred Stock. For the six months ended April 30, 2024 and 2023, net loss attributable to common stockholders was $53.5 million and $54.5 million, respectively, and net loss per common share was $0.12 and $0.13, respectively. The decrease is primarily due to the increased net loss attributable to noncontrolling interests. The net loss per common share for the six months ended April 30, 2024 also benefited from the higher number of weighted average shares outstanding due to share issuances since April 30, 2023.
LIQUIDITY AND CAPITAL RESOURCES
Overview, Cash Position, Sources and Uses
Our principal sources of cash have been proceeds from the sale of our products and projects, electricity generation revenues, research and development and service agreements with third parties, sales of our common stock through public equity offerings, and proceeds from debt, project financing and tax monetization transactions. We have utilized this cash to accelerate the commercialization of our solid oxide platforms, develop new capabilities to separate and capture carbon, develop and construct project assets, invest in capital improvements and expansion of our operations, perform research and development, pay down existing outstanding indebtedness, and meet our other cash and liquidity needs.
As of April 30, 2024, unrestricted cash and cash equivalents totaled $158.8 million compared to $250.0 million as of October 31, 2023. During the year ended October 31, 2023 and the six months ended April 30, 2024, the Company invested in United States (U.S.) Treasury Securities. The amortized cost of the U.S. Treasury Securities outstanding totaled $101.3 million as of April 30, 2024 compared to $103.8 million as of October 31, 2023 and is classified as Investments - short-term on the Consolidated Balance Sheets.
On April 10, 2024, the Company entered into Amendment No. 1 (the “Amendment”) to the Open Market Sale Agreement, dated July 12, 2022 (the “2022 Sales Agreement”), with Jefferies LLC, B. Riley Securities, Inc., Barclays Capital Inc., BMO Capital Markets Corp., BofA Securities, Inc., Canaccord Genuity LLC, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and Loop Capital Markets LLC (each, an “Agent” and together, the “Agents”) (the 2022 Sales Agreement as amended by the Amendment, the “Amended Sales Agreement”), with respect to an at the market offering program under which the Company may, from time to time, offer and sell shares of its common stock having an aggregate offering price of up to $300.0 million (exclusive of any amounts previously sold under the 2022 Sales Agreement prior to its amendment). Prior to the amendment of the 2022 Sales Agreement on April 10, 2024, no shares were sold by the Company under the 2022 Sales Agreement during the three or six months ended April 30, 2024. Between April 10, 2024 (the date