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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001140361-21-021846 0000936979 XXXXXXXX LIVE 3 Common stock, par value $0.05 per share 08/21/2025 false 0000087802 808757108 SCIENTIFIC INDUSTRIES INC 70 Orville Dr. Airport International Plaza Bohemia NY 11716 Brian L. Pessin (917) 887-1982 400 E 51st St, PH 31 New York NY 10022 Norman H. Pessin (917) 887-1982 400 E 51st St, PH 31 New York NY 10022 Y Brian L. Pessin a PF X1 397531 0 397531 0 397531 N 3.3 IN (1) Consists of 397,531 shares of common stock and warrants to purchase 146,316 shares of common stock. Y Norman H. Pessin a PF X1 570000 0 570000 0 570000 N 4.7 IN (2) Consists of 570,000 shares of common stock and warrants to purchase 130,000 shares of common stock. 0000936979 PESSIN SANDRA F a PF X1 466507 0 466507 0 466507 N 3.9 IN (3) Consists of 466,207 shares of common stock and warrants to purchase 233,253 shares of common stock. Common stock, par value $0.05 per share SCIENTIFIC INDUSTRIES INC 70 Orville Dr. Airport International Plaza Bohemia NY 11716 This Schedule 13D relates to the common stock, $0.05 par value (the "Common Stock" or the "Shares") of Scientific Industries, Inc. (the "Issuer"),whose principal executive offices are located at 70 Orville Dr, Airport International Plaza, Bohemia, NY 11716. This Schedule 13D is being filed by and for Brian L. Pessin, Norman H. Pessin and Sandra F. Pessin (each a "Reporting Person"). Certain information with respect to each Reporting Person is set forth below: 1) Brian L. Pessin 2) Norman H. Pessin 3) Sandra F. Pessin 1) Brian L. Pessin 65 E76th St, Apt 3DE New York, NY 10021 2) Norman H. Pessin 400 E 51st St, PH 31 New York, NY 10022 3) Sandra F. Pessin 400 E 51st St, PH 31 New York, NY 10022 1) Investor 2) Investor 3) Housewife 1) None 2) None 3) None 1) None 2) None 3) None 1) United States 2) United States 3) United States The aggregate purchase price of the 397,531 shares of Common Stock owned by Brian L. Pessin is approximately $714,462.09, including brokerage commissions. The shares of Common Stock owned by Brian L. Pessin were acquired with personal funds. The aggregate purchase price of the 570,000,shares of Common Stock owned by Norman H. Pessin is approximately $700,000 including brokerage commissions. The shares of Common Stock owned by Norman H. Pessin were acquired with personal funds.The aggregate purchase price of the 466,507 shares of Common Stock owned by Sandra F. Pessin is approximately $2,249,998.75 including brokerage commissions. The shares of Common Stock owned by Sandra F. Pessin were acquired with personal funds. The Reporting Persons originally purchased the Shares based on the belief that the Shares, when purchased, were undervalued and represented an attractive investment opportunity. Depending upon overall market conditions, other investment opportunities available to the Reporting Persons, and the availability of Shares at prices that would make the purchase or sale of Shares desirable, the Reporting Persons may endeavor to increase or decrease their position in the Issuer through, among other things, the purchase or sale of Shares on the open market or in private transactions or otherwise, on such terms and at such times as the Reporting Persons may deem advisable. The Reporting Persons intend to review their investment in the Issuer on a continuing basis. Depending on various factors including, without limitation, the Issuer's financial position and investment strategy, the price levels of the Shares, conditions in the securities markets and general economic and industry conditions, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, communications with management and the Board of Directors of the Issuer, engaging in discussions with third parties about the Issuer, making proposals to the Issuer concerning changes to the capitalization or operations of the Issuer, purchasing additional Shares, selling some or all of their Shares, engaging in short selling of or any hedging or similar transaction with respect to the Shares, or changing their intention with respect to any and all matters referred to in Item 4. Brian L. Pessin owns 397,531 shares of Common Stock of the Issuer, constituting 3.3% of the outstanding shares thereof. Norman H. Pessin owns 570,000 shares of Common Stock of the Issuer, constituting 4.7% of the outstanding shares thereof. Sandra F. Pessin owns 466,507 shares of Common Stock of the Issuer, constituting 3.9% of the outstanding shares thereof. Brian L. Pessin has sole voting and dispositive power with respect to the shares of Common Stock he owns directly. Norman H. Pessin has sole voting and dispositive power with respect to the shares of Common Stock she owns directly. Sandra F. Pessin has sole voting and dispositive power with respect to the shares of Common Stock she owns directly. Exhibit 99.1 attached hereto lists all transactions in securities of the Issuer during the past sixty days by the Reporting Persons. All of such transactions were effected through the exercise of warrants acquired in a private placement from April 17, 2025. 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 proceeds from the sale of, the shares of Common Stock. None. Exhibit 99.1: Transactions in the Securities of the Issuer During the Past 60 Days Brian L. Pessin /s/ Brian L. Pessin Brian L. Pessin 08/21/2025 Norman H. Pessin /s/ Norman H. Pessin Norman H. Pessin 08/21/2025 PESSIN SANDRA F /s/ Sandra F. Pessin Sandra F. Pessin 08/21/2025