# EDGAR Filing Document

**Accession Number:** 0001801142
**File Stem:** 0001193125-25-324915
**Filing Date:** 2025-12
**Character Count:** 11051
**Document Hash:** 0f10eb1e3a885e1982ed3d3116421a73
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-324915.hdr.sgml**: 20251218

**ACCESSION NUMBER**: 0001193125-25-324915

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

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251218

**DATE AS OF CHANGE**: 20251218

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ScanTech AI Systems Inc.
- **CENTRAL INDEX KEY:** 0001994624
- **STANDARD INDUSTRIAL CLASSIFICATION:** INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS [3825]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 933502562
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94829
- **FILM NUMBER:** 251583443

**BUSINESS ADDRESS:**
- **STREET 1:** 1177 AVENUE OF THE AMERICA, SUITE 5100
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036
- **BUSINESS PHONE:** 8886221218

**MAIL ADDRESS:**
- **STREET 1:** 1177 AVENUE OF THE AMERICA, SUITE 5100
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SEAPORT GLOBAL ASSET MANAGEMENT LLC
- **CENTRAL INDEX KEY:** 0001801142

**ORGANIZATION NAME:**
- **EIN:** 464157685
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 360 MADISON AVENUE
- **STREET 2:** 20TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10017
- **BUSINESS PHONE:** 2126167700

**MAIL ADDRESS:**
- **STREET 1:** 360 MADISON AVENUE
- **STREET 2:** 20TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10017

## Ex-99.A

**Schedule A**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;<u>Fund</u> | &nbsp;&nbsp;<u>Date</u> | &nbsp;&nbsp;<u>Transaction</u> | &nbsp;&nbsp;<u>Number of Shares</u> | &nbsp;&nbsp;<u>Price</u> |
| &nbsp;&nbsp;Seaport Group SIBS LLC | &nbsp;&nbsp;12/16/2025 | &nbsp;&nbsp;Sale | &nbsp;&nbsp;3000 | &nbsp;&nbsp;$4.2933 |
| &nbsp;&nbsp;Seaport Group SIBS LLC | &nbsp;&nbsp;12/17/2025 | &nbsp;&nbsp;Sale | &nbsp;&nbsp;100 | &nbsp;&nbsp;$3.80 |

---

------

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 2)**

**ScanTech AI Systems Inc.**

*(Name of Issuer)*

**Common Stock, par value $0.0001 per share**

*(Title of Class of Securities)*

**80603V203**

*(CUSIP Number)*

**Stephen C. Smith**<br>360 Madison Avenue<br>22nd Floor<br>New York NY 10017<br>(212) 616-7700

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**12/16/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **80603V203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Seaport Global Asset Management LLC** | Name of reporting person<br>**Seaport Global Asset Management LLC** | |
| 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>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 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>**NEW YORK** | Citizenship or place of organization<br>**NEW YORK** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**804867.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**804867.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**804867.00** | Aggregate amount beneficially owned by each reporting person<br>**804867.00** | |
| 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>**21.3%** | Percent of class represented by amount in Row (11)<br>**21.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IA** | Type of Reporting Person (See Instructions)<br>**IA** | |

---

| **CUSIP No.** | **80603V203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Seaport Group SIBS LLC** | Name of reporting person<br>**Seaport Group SIBS LLC** | |
| 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>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**804867.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**804867.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**804867.00** | Aggregate amount beneficially owned by each reporting person<br>**804867.00** | |
| 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>**21.3%** | Percent of class represented by amount in Row (11)<br>**21.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **80603V203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Stephen C. Smith** | Name of reporting person<br>**Stephen C. Smith** | |
| 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>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 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>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**804867.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**804867.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**804867.00** | Aggregate amount beneficially owned by each reporting person<br>**804867.00** | |
| 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>**21.3%** | Percent of class represented by amount in Row (11)<br>**21.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.0001 per share

**(b) Name of Issuer:**
ScanTech AI Systems Inc.

**(c) Address of Issuer's Principal Executive Offices:**
1735 Enterprise Drive, Buford, GA, 30518

**Item 5. Interest in Securities of the Issuer**

**(a)**
Items 5(a)-(c) of the Schedule 13D are amended and supplemented as follows:

The information set forth in rows 11 and 13 of the cover pages to this Schedule 13D is incorporated herein by reference. The percentages set forth in row 13 are based on approximately 3,780,656 shares of Common Stock outstanding, based on 75,613,124 shares of Common Stock outstanding as of December 11, 2025, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on December 15, 2025, and giving effect to the Issuer's one-for-twenty reverse stock split effected on December 16, 2025.

**(b)**
The information set forth in rows 7 through 10 of the cover pages to this Schedule 13D is incorporated herein by reference.

**(c)**
Schedule A to this Amendment No. 2 is incorporated by reference into this Item 5(c). Other than with respect to the transactions set forth in the disclosure incorporated by reference to this Item 5(c), none of the Reporting Persons has effected any transaction in the Issuer's securities since the filing of Amendment No. 1 to the Schedule 13D on October 15, 2025.

### 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:** Seaport Global Asset Management LLC

**Signature:** /s/ Stephen C. Smith

**Name/Title:** Stephen C. Smith, Authorized Signatory

**Date:** 12/18/2025

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:** Seaport Group SIBS LLC

**Signature:** /s/ Stephen C. Smith

**Name/Title:** Stephen C. Smith, Authorized Signatory

**Date:** 12/18/2025

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:** Stephen C. Smith

**Signature:** /s/ Stephen C. Smith

**Name/Title:** Stephen C. Smith

**Date:** 12/18/2025