[Form 4] NATURAL GAS SERVICES GROUP INC Insider Trading Activity

Rhea-AI Filing Summary

Stephen C. Taylor, a director of Natural Gas Services Group, reported the sale of 1,326 shares of the company's common stock on 09/24/2025 at $28.50 per share under a previously established Rule 10b5-1 trading plan. After the sale, Mr. Taylor directly beneficially owns 384,106 shares, indirectly owns 114,213 shares through a rabbi trust, and holds 4,456 restricted stock units that convert to common shares upon vesting.

Positive

• Sale executed under a Rule 10b5-1 plan, indicating the transaction was pre-arranged and not opportunistic
• Significant retained ownership: 384,106 shares directly and 114,213 shares indirectly via a rabbi trust
• Additional alignment via RSUs: 4,456 restricted stock units that convert to common shares upon vesting

Negative

• Reported sale of common stock (1,326 shares) could be viewed by some investors as insider liquidity
• Form 4 does not disclose total outstanding shares, so the percentage ownership impact cannot be calculated from this filing alone

Insights

Corporate Governance Expert

TL;DR: A director executed a planned, pre-established sale under a 10b5-1 plan while retaining significant direct and indirect ownership.

The reported transaction is a routine, pre-arranged sale under a Rule 10b5-1 plan, which typically reduces concerns about opportunistic trading. The director still holds a substantial equity stake both directly (384,106 shares) and indirectly (114,213 shares), plus 4,456 RSUs, indicating ongoing alignment with shareholders. No grants, option exercises, or material changes to beneficial ownership percentages are disclosed here.

Securities Analyst

TL;DR: The sale is immaterial relative to total reported holdings and follows a documented trading plan, suggesting limited near-term market impact.

The disposition of 1,326 shares at $28.50 is small compared with the director's retained holdings and RSUs. The Form 4 explicitly notes the sale was effectuated under a 10b5-1 plan established May 16, 2025, which provides pre-clearance context and timing. No additional derivative activity or unusual transactions are reported that would change the investment thesis based on this filing alone.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

1. Name and Address of Reporting Person^*

Taylor Stephen Charles

(Last) (First) (Middle)

404 VETERANS AIRPARK LANE

SUITE 300

(Street)

MIDLAND TX 79705

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
NATURAL GAS SERVICES GROUP INC [ NGS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
09/24/2025

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	09/24/2025		S		1,326(1)	D	$28.5	384,106	D
Common Stock								114,213	I	Rabbi Trust

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
Restricted Stock Units	(2)							(2)	(2)	Common Stock	4,456		4,456	D

Explanation of Responses:

1. The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

2. Not applicable. Each Restricted Stock Unit represents the right to receive one share of the Issuer's common stock upon vesting.

	Stephen C. Taylor	09/24/2025
	** 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.