In May 2020, we entered into sales agreements with Wedbush and Virtu Americas LLC (“Virtu”) (each a “Series E ATM Sales Agent”), under which we have the ability to issue and sell shares of our Series E Term Preferred Stock, from time to time, through the Series E ATM Sales Agents, up to $50.0 million aggregate liquidation preference in the Series E ATM Program. As of September 30, 2020, we had remaining capacity to sell up to $43.5 million of our Series E Term Preferred Stock under the Series E ATM Program.
During the six months ended September 30, 2020, we sold 258,610 shares of our Series E Term Preferred Stock under the Series E ATM Program with Wedbush and Virtu with an aggregate liquidation preference of $6.5 million. The weighted-average gross price per share net of discounts was $24.29 and resulted in gross proceeds of approximately $6.3 million. After deducting commissions and offering costs borne by us, net proceeds totaled approximately $6.2 million.
In September 2016, we completed a public offering of 2,300,000 shares of our Series D Term Preferred Stock at a public offering price of $25.00 per share. Gross proceeds totaled $57.5 million and net proceeds, after deducting underwriting discounts and offering costs borne by us, were $55.4 million. Total underwriting discounts and offering costs related to this offering were $2.1 million, which have been recorded as discounts to the liquidation value on our Consolidated Statements of Assets and Liabilities and are being amortized over the period ending September 30, 2023, the mandatory redemption date.
Our Series D Term Preferred Stock is not convertible into our common stock or any other security. Our Series D Term Preferred Stock provides for a fixed dividend equal to 6.25% per year, payable monthly (which equates to $3.6 million per year). We are required to redeem all outstanding shares of our Series D Term Preferred Stock on September 30, 2023, for cash at a redemption price equal to $25.00 per share, plus an amount equal to accumulated but unpaid dividends, if any, to, but excluding, the date of redemption. In addition, two other potential mandatory redemption triggers are as follows: (1) upon the occurrence of certain events that would constitute a change in control of us, we would be required to redeem all of our outstanding Series D Term Preferred Stock, and (2) if we fail to maintain asset coverage of at least 200% and are unable to correct such failure within a specific amount of time, we are required to redeem a portion of our outstanding Series D Term Preferred Stock or otherwise cure the asset coverage redemption trigger (and we may also redeem additional securities to cause the asset coverage to be 240%). We may also voluntarily redeem all or a portion of our Series D Term Preferred Stock at our sole option at the redemption price at any time.
Each series of our mandatorily redeemable preferred stock has a preference over our common stock with respect to dividends, whereby no distributions are payable on our common stock unless the stated dividends, including any accrued and unpaid dividends, on the mandatorily redeemable preferred stock have been paid in full. The Series D Term Preferred Stock and Series E Term Preferred Stock are considered liabilities in accordance with GAAP and, as such, affect our asset coverage, exposing us to additional leverage risks. The asset coverage on our senior securities that are stock (our Series D Term Preferred Stock and Series E Term Preferred Stock) as of September 30, 2020 was 235.9%, calculated pursuant to Sections 18 and 61 of the 1940 Act.
Revolving Line of Credit
On August 22, 2018, we, through our wholly-owned subsidiary, Gladstone Business Investment, LLC (“Business Investment”), entered into Amendment No. 4 to the Fifth Amended and Restated Credit Agreement, originally entered into on April 30, 2013 and as previously amended, with KeyBank National Association (“KeyBank”) as administrative agent, lead arranger, managing agent and lender, the Adviser, as servicer, and certain other lenders party thereto. The revolving period was extended to August 22, 2021, and if not renewed or extended by such date, all principal and interest will be due and payable on August 22, 2023 (two years after the revolving period end date). Additionally, the Credit Facility commitment amount was increased from $165.0 million to $200.0 million and, subject to certain terms and conditions, can be expanded to a total facility amount of $300.0 million through additional commitments from existing or new lenders. We incurred fees of approximately $1.6 million in connection with this amendment.
On August 10, 2020, we, through Business Investment, entered into Amendment No. 5 to the Credit Facility. Among other things, Amendment No. 5 amends the Credit Facility to (i) add LIBOR replacement language; (ii) implement a 0.5% LIBOR floor; (iii) reduce the facility size from $200.0 million to $180.0 million, which may be expanded to $300.0 million through additional commitments; and (iv) provide certain other changes to existing terms and covenants. In addition, Amendment No. 5 provides for certain temporary changes during the COVID-19 Relief Period (which began on August 10, 2020 and ends on March 31, 2021, and which may be extended, subject to certain conditions) including: (i) amending the definition of “Effective Advance Rate,” provided that during such period the overall effective advance rate does not exceed 55%; and (ii) removing or changing certain “Excess Concentration Limits” (as defined in the Credit Facility).
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