QuantumSphere, Inc. (OTCPK:QSIM) announced that it signed a securities purchase agreement for the private placement of 5% secured promissory notes for gross proceeds of $512,500 on June 8, 2016. The notes were issued at discount of 15%. The notes bear a fixed interest rate of 5% per annum and will mature after four months from the date of issue. The interest shall accrue and be payable at maturity in the form of cash. The notes will bear an interest rate of 15% per annum in the case of default. The notes will be convertible into the common shares of the company at a variable conversion price which will be calculated by taking 60% of the volume-weighted average price of the common stock on the OTCQB during 30 consecutive trading day period immediately preceding the trading day that the company receives a notice of conversion from investor. The notes are secured and have detachable common stock purchase warrants. The warrants shall consist of 1.5 shares of common stock, exercisable at the price per share of the company's next equity financing, for every $1 of original principal amount of these notes. The transaction included participation from accredited investors. The company paid legal fees of $12,500. The company issued securities pursuant to exemption provided under Regulation D.