SCHEDULE 13D/A 0001192161 XXXXXXXX LIVE 6 Common Stock, par value $0.001 per share 10/13/2025 false 0000944075 83368E200 SOCKET MOBILE, INC.

40675 ENCYCLOPEDIA CIRCLE FREMONT CA 94538-2475

Jason Wu 5109333085 40675 Encyclopedia Circle Fremont CA 94538 0001192161 N BASS CHARLIE PF N X1 4477179.00 0.00 4477179.00 0.00 4477179.00 N 41.3 IN Common Stock, par value $0.001 per share SOCKET MOBILE, INC. 40675 ENCYCLOPEDIA CIRCLE FREMONT CA 94538-2475 Charlie Bass The business address of Mr. Bass is c/o Socket Mobile, Inc., 40675 Encyclopedia Cir., Fremont, CA 94538. Mr. Bass is Chairman of the Board of Directors of the Issuer, whose business address is 40675 Encyclopedia Cir., Fremont, CA 94538. No. No. United States On October 13, 2025, Transferor transferred to Transferee a Secured Subordinated Convertible Note originally issued by the Company on May 26, 2023, with a principal amount of $500,000 (the Note). In consideration for the transfer, the Transferee paid the Transferor the purchase price of $500,000 in cash by wire transfer on the date hereof. The transaction represents a private transfer of the Note for investment purposes. The transfer did not involve any plans or proposals that relate to or would result in any of the matters set forth in paragraphs (a) through (j) of Item 4 of Schedule 13D. (a) Mr. Bass is the beneficial owner of 4,477,179 shares of Common Stock consisting of (i) 1,603,151 shares of Common Stock held by the Bass Trust, (ii) up to 684,931 shares of Common Stock issuable to the Bass Trust upon conversion of the convertible subordinated secured promissory note purchased by the Bass Trust on August 31, 2020 (the 2020 Note)., (iii) up to 1,119,402 shares of Common Stock issuable to the Bass Trust upon conversion of the convertible subordinated secured promissory note purchased by the Bass Trust on May 26, 2023 (the 2023 Note), (iv) up to 551,760 shares of Common Stock issuable to the Bass Trust upon conversion of the convertible subordinated secured promissory note purchased by the Bass Trust on August 21, 2024 (the 2024 Note), (v) up to 467,289 shares of Common Stock issuable to the Bass Trust upon conversion of the 2025 Note, and (vi) up to 50,646 shares of Common Stock issuable pursuant to stock options held by Mr. Bass that are exercisable within 60 days of the date of this Amendment. Such shares of Common Stock, collectively, represent 41.3% of the 10,835,490 shares of Common Stock deemed to be outstanding for the purpose of computing the percentage of outstanding shares of Common Stock owned by Mr. Bass pursuant to SEC Rule 13d-3(d)(1)(i), and which consists of (i) 7,921,761 shares of Common Stock outstanding as of October 13, 2025, (ii) 2,874,028 shares of Common Stock issuable upon conversion of the 2020 Note, 2023 Note, 2024 Note and 2025 Note and exercise of the stock options described above. Mr. Bass has sole power to vote and dispose of all shares of Common Stock beneficially owned by Mr. Bass. Except for the transfer described above, the Reporting Person has not effected any transactions in the securities of the Issuer during the past 60 days. Not applicable. Not applicable. The transferee acquired the convertible note from Mr. Kevin Mills pursuant to a Convertible Note Transfer Agreement dated October 13, 2025. Other than as described, there are no arrangements, understandings, or relationships regarding the securities of the Issuer. Exhibit 1 - Convertible Note Transfer Agreement, dated October 13, 2025, between Kevin Mills and Charlie Bass. BASS CHARLIE /s/ Charlie Bass 10/15/2025