# EDGAR Filing Document

**Accession Number:** 0001847075
**File Stem:** 0001213900-26-065887
**Filing Date:** 2026-6
**Character Count:** 12469
**Document Hash:** af89759822ab57c7cd91272912c38cfc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-065887.hdr.sgml**: 20260605

**ACCESSION NUMBER**: 0001213900-26-065887

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260605

**DATE AS OF CHANGE**: 20260605

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SAIHEAT Ltd
- **CENTRAL INDEX KEY:** 0001847075
- **STANDARD INDUSTRIAL CLASSIFICATION:** FINANCE SERVICES [6199]
- **ORGANIZATION NAME:** 09 Crypto Assets
- **EIN:** 981584130
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94010
- **FILM NUMBER:** 261070085

**BUSINESS ADDRESS:**
- **STREET 1:** 437 MADISON AVENUE
- **STREET 2:** 27TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** (732) 910-9692

**MAIL ADDRESS:**
- **STREET 1:** 437 MADISON AVENUE
- **STREET 2:** 27TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SAI.TECH Global Corp
- **DATE OF NAME CHANGE:** 20220502

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TradeUP Global Corp
- **DATE OF NAME CHANGE:** 20210219
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MA TO
- **CENTRAL INDEX KEY:** 0002138840

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** FLAT B-6, 13/F.,BLOCK B,LOK SING CENTRE,
- **STREET 2:** 19-31 YEE WO $TREET,CAUSEWAY BAY
- **CITY:** HONG KONG
- **PROVINCE COUNTRY:** K3
- **ZIP:** 00000

## Exhibit 99.1

**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.

---

| |
|:---|
| **Energy Science Artist Holding Limited** |
| /s/ To Ma |
| Name: To Ma |
| Title: Director |
| **Longwin Global Limited** |
| /s/ To Ma |
| Name: To Ma |
| Title: Director |
| **To Ma** |
| /s/ To Ma |
| Name: To Ma |

---

### UNITED STATES 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**<br>Vistra Corporate Services Centre, Suite<br>23, 1st Floor, Eden Plaza, Eden Island<br>Mahe T2 00000<br>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)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Energy Science Artist Holding Limited** | Name of reporting person<br>**Energy Science Artist Holding Limited** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**D8** | Citizenship or place of organization<br>**D8** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**642043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**642043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**642043.00** | Aggregate amount beneficially owned by each reporting person<br>**642043.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**100%** | Percent of class represented by amount in Row (11)<br>**100%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Longwin Global Limited** | Name of reporting person<br>**Longwin Global Limited** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**T2** | Citizenship or place of organization<br>**T2** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**642043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**642043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**642043.00** | Aggregate amount beneficially owned by each reporting person<br>**642043.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**100%** | Percent of class represented by amount in Row (11)<br>**100%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**To Ma** | Name of reporting person<br>**To Ma** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**CHINA** | Citizenship or place of organization<br>**CHINA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**642043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**642043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**642043.00** | Aggregate amount beneficially owned by each reporting person<br>**642043.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**100%** | Percent of class represented by amount in Row (11)<br>**100%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for 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

**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, U0, 058815

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 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.

**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.

### 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.

**Reporting Person:** Energy Science Artist Holding Limited

**Signature:** /s/ To Ma

**Name/Title:** To Ma / Director

**Date:** 06/05/2026

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.

**Reporting Person:** Longwin Global Limited

**Signature:** /s/ To Ma

**Name/Title:** To Ma / Director

**Date:** 06/05/2026

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.

**Reporting Person:** To Ma

**Signature:** /s/ To Ma

**Name/Title:** To Ma

**Date:** 06/05/2026