SCHEDULE 13D 0002073198 XXXXXXXX LIVE SCKT 05/30/2025 false 0000944075 83368E200 SOCKET MOBILE, INC.

40675 ENCYCLOPEDIA CIRCLE 40675 ENCYCLOPEDIA CIRCLE FREMONT CA 94538-2475

Lynn Zhao 5109333016 40675 Encyclopedia Cir. Fremont CA 94587 0002073198 N Mills Enrico Kevin PF N V8 763098.00 0.00 763098.00 0.00 763098.00 N 9.1 IN (1) Consists of (i) 286,389 shares of Common Stock held by Enrico Mills, (ii) 50,415 shares held in custodial accounts for his minor children, and (iii) up to 426,294 shares of Common Stock issuable to Enrico Mills upon conversion of convertible subordinated secured promissory notes. (2) Percentage ownership is based on 8,348,055 shares of common stock of Socket Mobile, Inc. deemed to be outstanding, which consists of (i) 7,921,761 shares of Common Stock outstanding as of June 2, 2025, and (ii) 426,294 shares of Common Stock issuable upon conversion of the convertible subordinated secured promissory notes described in footnote 1 above. SCKT SOCKET MOBILE, INC. 40675 ENCYCLOPEDIA CIRCLE 40675 ENCYCLOPEDIA CIRCLE FREMONT CA 94538-2475 This Schedule 13D is being filed by Enrico Mills (the 'Reporting Person'). The business address of Reporting Person is c/o Socket Mobile, Inc., 40675 Encyclopedia Cir., Fremont, CA 94538. The Reporting Person is employed by the Issuer as General Manager Applications. The Issuer's business address is 40675 Encyclopedia Cir., Fremont, CA 94538. No. No Switzerland, Ireland and the United Kingdom 2024 Convertible Note Financing On August 21, 2024, the Reporting Person purchased a convertible subordinated secured promissory note from the Issuer in the principal amount of $250,000 (the "2024 Note"). The 2024 Note carries a 10% annual interest rate and has a maturity date of August 21, 2027. The principal amount of the 2024 Note is convertible, at the option of the holder, into a maximum of 262,742 shares of Common Stock at any time on or prior to the maturity date. The Reporting Person used personal funds for the purchase and is the beneficial owner of the 2024 Note, holding sole power to dispose of or direct its disposition. 2025 Convertible Note Financing On May 30, 2025, the Reporting Person purchased a convertible subordinated secured promissory note from the Issuer in the principal amount of $175,000 (the 2025 Note). The 2025 Note carries a 10% annual interest rate and has a maturity date of May 30, 2028. The principal amount of the 2025 Note is convertible, at the option of the holder, into a maximum of 163,551 shares of Common Stock at any time on or prior to the maturity date. The Reporting Person used personal funds for the purchase and is the beneficial owner of the 2025 Note, holding sole power to dispose of or direct its disposition. The acquisition of the 2024 Note and 2025 Note by the Reporting Person was for investment purposes only. As of the date of this statement, the Reporting Person has no 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 the instructions to Schedule 13D. The Reporting Person is the beneficial owner of 763,098 shares of Common Stock, consisting of (i) 286,389 shares of Common Stock held by him, (ii) 50,415 shares of Common Stock held in custodial accounts for his minor children, (iii) up to 262,743 shares of Common Stock issuable to the Reporting Person upon conversion of the convertible subordinated secured promissory note purchased by the Reporting Person on August 21, 2024 (the '2024 Note'), and (iv) up to 163,551 shares of Common Stock issuable to the Reporting Person upon conversion of the 2025 Note. Such shares of Common Stock, collectively, represent approximately 9.14% of the 8,348,055 shares of Common Stock deemed to be outstanding for the purpose of computing the percentage of outstanding shares of Common Stock owned by the Reporting Person pursuant to SEC Rule 13d-3(d)(1), and which consists of (i) 7,921,761 shares of Common Stock outstanding as of June 2, 2025 and (ii) 426,294 shares of Common Stock issuable upon conversion of the 2024 Note and 2025 Note described above. The Reporting Person has sole power to vote and dispose of all shares of Common Stock beneficially owned by him. On February 1, 2025, the Reporting Person was granted 12,500 shares of restricted stock as employment compensation, which vest over a four-year period. N/A N/A None https://www.sec.gov/Archives/edgar/data/944075/000094407524000060/ex10_1.htm https://www.sec.gov/Archives/edgar/data/944075/000094407525000029/ex10_1.htm Mills Enrico Kevin /Enrico Kevin Mills/ 06/12/2025