View:

Download DOC

Download PDF

Download XLS

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)*

SAIHEAT Ltd (Name of Issuer)

Class A and Class B Ordinary Shares, par value $0.0015 per share (Title of Class of Securities)

(CUSIP Number)

To Ma Vistra Corporate Services Centre, Suite, 23, 1st Floor, Eden Plaza, Eden Island Mahe, T2, 00000 248 4325 600 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

06/05/2026 (Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No.

1	Name of reporting person Energy Science Artist Holding Limited
2	Check the appropriate box if a member of a Group (See Instructions)   (a)   (b)
3	SEC use only
4	Source of funds (See Instructions) OO
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
6	Citizenship or place of organization VIRGIN ISLANDS, BRITISH
Number of Shares Beneficially Owned by Each Reporting Person With:	7 Sole Voting Power 642,043.00 8 Shared Voting Power 0.00 9 Sole Dispositive Power 642,043.00 10 Shared Dispositive Power 0.00
11	Aggregate amount beneficially owned by each reporting person 642,043.00
12	Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
13	Percent of class represented by amount in Row (11) 100 %
14	Type of Reporting Person (See Instructions) CO

SCHEDULE 13D

CUSIP No.

1	Name of reporting person Longwin Global Limited
2	Check the appropriate box if a member of a Group (See Instructions)   (a)   (b)
3	SEC use only
4	Source of funds (See Instructions) OO
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
6	Citizenship or place of organization SEYCHELLES
Number of Shares Beneficially Owned by Each Reporting Person With:	7 Sole Voting Power 642,043.00 8 Shared Voting Power 0.00 9 Sole Dispositive Power 642,043.00 10 Shared Dispositive Power 0.00
11	Aggregate amount beneficially owned by each reporting person 642,043.00
12	Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
13	Percent of class represented by amount in Row (11) 100 %
14	Type of Reporting Person (See Instructions) CO

SCHEDULE 13D

CUSIP No.

1	Name of reporting person To Ma
2	Check the appropriate box if a member of a Group (See Instructions)   (a)   (b)
3	SEC use only
4	Source of funds (See Instructions) OO
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
6	Citizenship or place of organization CHINA
Number of Shares Beneficially Owned by Each Reporting Person With:	7 Sole Voting Power 642,043.00 8 Shared Voting Power 0.00 9 Sole Dispositive Power 642,043.00 10 Shared Dispositive Power 0.00
11	Aggregate amount beneficially owned by each reporting person 642,043.00
12	Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
13	Percent of class represented by amount in Row (11) 100 %
14	Type of Reporting Person (See Instructions) IN

Comment for Type of Reporting Person:

For box 7, 9 and 11: Represents 642,043 Class B ordinary shares held by Energy Science Artist Holding Limited. For box 13: Represents 100% class B ordinary shares

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Class A and Class B Ordinary Shares, par value $0.0015 per share
(b)	Name of Issuer: SAIHEAT Ltd
(c)	Address of Issuer's Principal Executive Offices: #266A South Bridge Road, #02-01, Singapore, SINGAPORE , 058815.
Item 1 Comment: This amendment No.2 to Schedule 13D/A (this "Schedule 13D/A") relates to the Class A ordinary shares, par value $0.0015 per share (the "Class A ordinary shares") and Class B ordinary shares, par value $0.0015 per share (the "Class B ordinary shares"), of SAIHEAT Limited (the "Issuer"), a Cayman Islands exempted company. The address of the Issuer's principal executive office is #266A South Bridge Road, #02-01 Singapore (058815).
Item 2.	Identity and Background
(a)	This Schedule 13D/A is filed by (i) Energy Science Artist Holding Limited ("Energy Science"), a British Virgin Islands Business Company; (ii) Longwin Global Limited ("Longwin Global"), a Seychelles company; and (iii)To Ma, the sole shareholder of Longwin Global. Energy Science, Longwin Global and To Ma are deemed to be the "Reporting Persons" and, may be referred to herein as each a "Reporting Person".
(b)	The business address for Energy Science and Longwin Global is Asia Leading Chambers, Road Town, Tortola VG1110, British Virgin Islands and Vistra Corporate Services Centre, Suite 23, 1st Floor, Eden Plaza, Eden Island, Mahe, Republic of Seychelles, respectively
(c)	The principal business of each of Energy Science and Longwin Global is to serve as a holding company. To Ma is a private entrepreneur.
(d)	During the last five years, none of the Reporting Person has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).
(e)	During the last five years, none of the Reporting Person was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
Item 3.	Source and Amount of Funds or Other Consideration
	On June 5, 2026, Peng Zhang entered into a share transfer form with Longwin Global, pursuant to which Peng Zhang, as transferor, agreed to transfer his one ordinary share of Energy Science, representing 100% issued share capital of Energy Science, to Longwin Global, as transferee (the " Transaction") at a consideration of US$1,000,000. The consummation of the Transaction resulted in a change in control of the Issuer, with To Ma becoming the sole controlling shareholder of the Issuer, holding 84.36% voting power in the Issuer. Subsequent to the Transaction, each of Energy Science and Longwin Global is 100% controlled by its sole shareholder, To Ma.
Item 4.	Purpose of Transaction
	See response to Item 3. Except to the extent provided in this Schedule 13D/A, none of the Reporting Persons have any current plans or proposals that relate to, or could result in any of the matters referred to in paragraphs (a) through (j) inclusive, of Item 4 of this Schedule 13D/A. The Reporting Persons may, at any time and from time to time, review or reconsider their positions and/or change their purposes and/or formulate plans or proposals with respect thereto.
Item 5.	Interest in Securities of the Issuer
(a)	See responses to Rows (11) and (13) of the cover pages to this Schedule 13D/A. The percentage used in Row (13) of the cover page to this Schedule 13D/A is calculated based upon 1,190,317 class A ordinary shares and 642,043 Class B ordinary shares currently outstanding.
(b)	See responses to Rows (7) through (10) of the cover pages to this Schedule 13D/A.
(c)	Other than as disclosed in this Schedule 13D/A, each of the Reporting Persons has not effected any transaction in the Issuer's securities within the past 60 days.
(d)	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 Class A ordinary shares or the Class B ordinary shares held by the Reporting Person.
(e)	Not applicable.
Item 6.	Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
	Except as described in this Schedule 13D/A, there are no contracts, arrangements, understandings, or relationships other than as disclosed among the persons named in Item 2 hereof and any other person, with respect to the securities of the Company.
Item 7.	Material to be Filed as Exhibits.
	Exhibit 99.1 Joint Filing Agreement dated June 5, 2026, by and among the Reporting Persons

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.

Energy Science Artist Holding Limited

Signature: /s/ To Ma Name/Title: To Ma / Director Date: 06/05/2026

Longwin Global Limited

Signature: /s/ To Ma Name/Title: To Ma / Director Date: 06/05/2026

To Ma

Signature: /s/ To Ma Name/Title: To Ma Date: 06/05/2026

Exhibit 99.1

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)

SAIHEAT Limited

The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of June 5, 2026.