SEC Form SC 13G/A filed by ProSomnus Inc. (Amendment)

2/14/23 4:15:53 PM ET

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SC 13G/A 1 Prosomnus_Amend.txt Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* (Name of Issuer) ProSomnus, Inc. f/k/a Lakeshore Acquisition I Corp (Title of Class of Securities) Common Stock, par value $0.0001 per share (CUSIP Number) 50535E108 (Date of Event Which Requires Filing of this Statement) 12/31/2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) CUSIP No. 50535E108 (1) Names of reporting persons Polar Asset Management Partners Inc. (2) Check the appropriate box if a member of a group (see instructions) (a) (b) (3) SEC use only (4) Citizenship or place of organization Ontario, Canada Number of shares beneficially owned by each reporting person with: (5) Sole voting power 814,404(including 251,858 Shares issuable upon the exercise of warrants) (6) Shared voting power (7) Sole dispositive power 814,404 (including 251,858 Shares issuable upon the exercise of warrants) (8) Shared dispositive power (9) Aggregate amount beneficially owned by each reporting person 814,404 (including 251,858 Shares issuable upon the exercise of warrants) (10) Check if the aggregate amount in Row (9) excludes certain shares (see instructions) (11) Percent of class represented by amount in Row (9) 5.00% (12) Type of reporting person (see instructions) IA Item 1(a) Name of issuer: ProSomnus, Inc. f/k/a Lakeshore Acquisition I Corp Item 1(b) Address of issuer's principal executive offices: 5675 Gibraltar Avenue Pleasanton, California, 94588 2(a) Name of person filing: This statement is filed by Polar Asset Management Partners Inc., a company incorporated under the laws of Ontario, Canada, which serves as the investment advisor to Polar Multi-Strategy Master Fund, a Cayman Islands exempted company ("PMSMF") with respect to the Shares (as defined below) directly held by PMSMF. 2(b) Address or principal business office or, if none, residence: 16 York Street, Suite 2900, Toronto, ON, Canada M5J 0E6. 2(c) Citizenship: Canada 2(d) Title of class of securities: Common Stock, par value $0.0001 per share 2(e) CUSIP Number: 50535E108 Item 3. [ ] Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o); [ ] Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c); [ ] Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c); [ ] Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8); [ ] An investment adviser in accordance with 240.13d-1(b)(1)(ii)(E); [ ] An employee benefit plan or endowment fund in accordance with 240.13d-1(b)(1)(ii)(F); [ ] A parent holding company or control person in accordance with 240.13d-1(b)(1)(ii)(G); [ ] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); [ ] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act (15 U.S.C. 80a-3); [x] A non-U.S. institution in accordance with 240.13d-1(b)(1)(ii)(J); [ ] Group, in accordance with 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J), please specify the type of institution: The Reporting Person is an investment fund manager, portfolio manager, exempt market dealer and commodity trading manager registered with the Ontario Securities Commission. Item 4. Ownership As of December 31, 2022 1. Polar Asset Management Partners Inc. (a) Amount beneficially owned: 814,404 (including 251,858 Shares issuable upon the exercise of warrants) (b) Percent of class: 5.00% (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote: 814,404 (including 251,858 Shares issuable upon the exercise of warrants) (ii) Shared power to vote or to direct the vote: 0 (iii) Sole power to dispose or to direct the disposition of: 814,404 (including 251,858 Shares issuable upon the exercise of warrants) (iv) Shared power to dispose or to direct the disposition of: 0 Item 5.Ownership of 5 Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following []. Instruction. Dissolution of a group requires a response to this item. Not applicable Item 6. Ownership of More than 5 Percent on Behalf of Another Person. Not applicable Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reporting on by the Parent Holding Company or Control Person. Not applicable Item 8. Identification and Classification of Members of the Group Not applicable Item 9. Notice of Dissolution of Group. Not applicable Item 10. Certifications By signing below I certify that, to the best of his/her knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Signature. After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: February 14, 2023 POLAR ASSET MANAGEMENT PARTNERS INC. By: /s/ Andrew Ma Name: Andrew Ma Title: Chief Compliance Officer

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SEC Form SC 13G/A filed by ProSomnus Inc. (Amendment)

2/14/23 4:15:53 PM ET

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Medical Specialities

Health Care

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SEC Form SC 13G/A filed by ProSomnus Inc. (Amendment)

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SEC Form SC 13G/A filed by ProSomnus Inc. (Amendment)

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Insider Trading

Kim Sung was granted 315,742 shares, increasing direct ownership by 157% to 516,808 units (SEC Form 4)

Dow Brian B was granted 315,742 shares, increasing direct ownership by 337% to 409,492 units (SEC Form 4)

Liptak Len was granted 1,322,756 shares, increasing direct ownership by 208% to 1,957,216 units (SEC Form 4)

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Press Releases

ProSomnus Reports Record Fourth Quarter and Fiscal Year 2023 Financial Results

ProSomnus Reschedules Fourth Quarter and Fiscal Year 2023 Investor and Business Update Call

ProSomnus Reports Successful Pilot Study Validation of Next Generation Remote Patient Monitoring Device for Obstructive Sleep Apnea

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SEC Filings

ProSomnus Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Bankruptcy or Receivership, Creation of a Direct Financial Obligation, Events That Accelerate or Increase a Direct Financial Obligation, Regulation FD Disclosure, Financial Statements and Exhibits

ProSomnus Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

SEC Form 10-K/A filed by ProSomnus Inc. (Amendment)

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Financials

ProSomnus Reports Record Fourth Quarter and Fiscal Year 2023 Financial Results

ProSomnus Reschedules Fourth Quarter and Fiscal Year 2023 Investor and Business Update Call

ProSomnus Announces Fourth Quarter and Fiscal Year 2023 Investor and Business Update Call and Participation at the 36th Annual ROTH Conference in March 2024

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Large Ownership Changes

SEC Form SC 13G filed by ProSomnus Inc.