ScanTech AI Systems (STAI) director affiliate reports stock sales, 804,867 shares held

Rhea-AI Filing Summary

ScanTech AI Systems Inc. director-affiliated entities reported small open-market sales of common stock. On December 16, 2025, 3,000 shares of common stock, par value $0.0001 per share, were sold at a price of $4.2933 per share. On December 17, 2025, an additional 100 shares were sold at a price of $3.80 per share. After these transactions, a total of 804,867 shares of ScanTech AI Systems Inc. common stock are reported as beneficially owned indirectly through Seaport Group SIBS LLC, which is managed by Seaport Global Asset Management LLC.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SEAPORT GLOBAL ASSET MANAGEMENT LLC

(Last) (First) (Middle)

360 MADISON AVENUE

(Street)

NEW YORK NY 10017

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ScanTech AI Systems Inc. [ STAI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.0001 per share	12/16/2025		S		3,000	D	$4.2933	804,967	I	See footnote(1)
Common Stock, par value $0.0001 per share	12/17/2025		S		100	D	$3.8	804,867	I	See footnote(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares held directly by Seaport Group SIBS LLC ("SIBS"). SIBS is managed by Seaport Global Asset Management LLC ("SGAM"). Stephen C. Smith is the manager of SGAM.

	/s/ Stephen C. Smith - for Seaport Global Asset Management LLC, By: Stephen C. Smith, Authorized Signatory	12/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did ScanTech AI Systems Inc. (STAI) report?

The filing reports that a director-affiliated holder sold 3,000 shares of ScanTech AI Systems Inc. common stock on December 16, 2025 and 100 shares on December 17, 2025.

At what prices were the STAI shares sold in this Form 4 filing?

The sales of ScanTech AI Systems Inc. common stock were executed at $4.2933 per share for 3,000 shares on December 16, 2025 and $3.80 per share for 100 shares on December 17, 2025.

How many ScanTech AI Systems Inc. (STAI) shares are beneficially owned after the reported transactions?

Following the reported sales, the reporting person indicates beneficial ownership of 804,867 shares of ScanTech AI Systems Inc. common stock, held indirectly.

Who is the reporting person in this STAI Form 4 and how are the shares held?

The shares are held directly by Seaport Group SIBS LLC, which is managed by Seaport Global Asset Management LLC. Stephen C. Smith is the manager of Seaport Global Asset Management LLC and signed the form.

What is the relationship of the reporting person to ScanTech AI Systems Inc. (STAI)?

The filing identifies the reporting person as a Director of ScanTech AI Systems Inc.

Are the STAI shares in this Form 4 held directly or indirectly?

The 804,867 shares of ScanTech AI Systems Inc. common stock reported after the transactions are held with indirect beneficial ownership through Seaport Group SIBS LLC.