Item 3 of the Schedule 13D is hereby amended and supplemented as follows: Block Sale. On June 2, 2026, Kaufman Kapital sold 1,189,676 shares of Common Stock in a privately negotiated block transaction at a price of $3.06 per share, for aggregate gross proceeds of approximately $3,640,409. These shares were sold pursuant to the Issuer's Registration Statement on Form S-3 (Reg. No. 333-288512).

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Block Sale. On June 2, 2026, Kaufman Kapital sold 1,189,676 shares of Common Stock in a privately negotiated block transaction. Following such sale, the Reporting Persons' remaining direct common stock holdings consist of 500,000 shares acquired upon exercise of the $1.50 Warrant on May 7, 2026. Current Plans and Purposes. The Reporting Persons currently hold the securities of the Issuer for investment purposes. The Reporting Persons continuously evaluate their investment in the Issuer based on a variety of factors, including the Issuer's financial condition, results of operations, business prospects, general market and economic conditions, and other factors. Depending on such evaluation, the Reporting Persons may from time to time acquire additional securities of the Issuer, including through conversion of outstanding Convertible Note principal and accrued interest, subject to the Beneficial Ownership Limitation described below, dispose of some or all of the securities of the Issuer, including through open-market sales, privately negotiated transactions, block trades, registered offerings or otherwise, or take any other action with respect to their investment in the Issuer as they may deem appropriate. Any such transactions may be effected at any time and from time to time, subject to applicable law, and will depend upon a variety of factors, including those described above. The Reporting Persons may sell some or all of the 500,000 shares currently held directly by Kaufman Kapital if and when such shares are registered for resale or otherwise may be sold in accordance with applicable law. Sales of directly held Common Stock may increase the number of shares issuable upon conversion of the Convertible Note that may be acquired without exceeding the Beneficial Ownership Limitation, without increasing the Reporting Persons' aggregate beneficial ownership above the Maximum Percentage. Except as otherwise described in this Amendment, the Reporting Persons do not have any present plans or proposals that relate to or would result in any of the matters described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.

Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows: (a)-(b) As of the date of this Amendment, the Reporting Persons directly hold 500,000 shares of Common Stock through Kaufman Kapital, consisting solely of shares acquired upon exercise of the $1.50 Warrant on May 7, 2026.

The Reporting Persons also hold the Convertible Note, which has a remaining principal balance of $2,900,000 and approximately $680,000 of accrued and unpaid interest as of the date hereof. Both principal and accrued interest are convertible into Common Stock at the option of the holder at a fixed conversion price of $0.7582 per share. Pursuant to Amendment No. 3 to the Convertible Note, dated May 14, 2026, Kaufman Kapital may not convert any portion of the Convertible Note to the extent that, after giving effect to such conversion, Kaufman Kapital, together with its affiliates, would beneficially own in excess of 9.99% of the outstanding shares of Common Stock (the "Beneficial Ownership Limitation" or the "Maximum Percentage"). The Maximum Percentage may only be increased or decreased upon not less than sixty-one (61) days' prior written notice to the Issuer. As a result of the Beneficial Ownership Limitation, the Reporting Persons may not acquire shares upon conversion of the Convertible Note to the extent such conversion would cause their beneficial ownership to exceed 9.99% of the outstanding Common Stock. Based on 15,316,030 shares of Common Stock outstanding as of May 14, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the period ended March 31, 2026, filed with the SEC on May 14, 2026, the Reporting Persons may be deemed to beneficially own approximately 9.99% of the outstanding Common Stock, consisting of (i) 500,000 shares of Common Stock held directly by Kaufman Kapital and (ii) such number of shares issuable upon conversion of the Convertible Note as may be acquired within 60 days without causing the Reporting Persons' beneficial ownership to exceed the Maximum Percentage. For purposes of calculating beneficial ownership in accordance with Rule 13d-3(d)(1), the shares of Common Stock underlying the Convertible Note in excess of the number of shares that may be acquired within 60 days without exceeding the Beneficial Ownership Limitation are excluded from beneficial ownership. Kaufman, as the sole member and manager of Kaufman Kapital, has sole voting and dispositive power over all securities held by Kaufman Kapital. Kaufman does not directly own any shares of Common Stock.

The following transactions in the Common Stock were effected by the Reporting Persons during the past 60 days: Date: May 5, 2026, Transaction: Sale of Common Stock, Shares: 255,951 (D), Price/Share: $3.2880 avg. ($3.25-$3.55), How Effected: Open market Date: May 7, 2026, Transaction: Exercise of $1.50 Warrant, Shares: 500,000 (A), Price/Share: $1.50, How Effected: Warrant exercise Date: May 12, 2026, Transaction: Sale of Common Stock, Shares: 213,830 (D), Price/Share: $3.26 avg. ($3.25-$3.45), How Effected: Open market Date: June 2, 2026, Transaction: Sale of Common Stock, Shares: 1,189,676 (D), Price/Share: $3.06, How Effected: Block trade (privately negotiated) Full information regarding the number of shares sold at each separate price on May 5, 2026 and May 12, 2026 within the stated ranges will be provided upon request to the SEC staff, the Issuer, or a security holder of the Issuer.

No person other than the Reporting Persons is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities covered by this statement.

Not applicable.

No changes from Amendment No. 4 other than as described herein. The Convertible Note, the Blocker Amendment, and the Current Secured Note remain outstanding on the terms described in Amendment No. 4. All exhibits referenced in Amendment No. 4 are incorporated herein by reference.

No new exhibits. All exhibits previously filed with or incorporated by reference into the Schedule 13D remain in effect.