[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 a sale of 1,638 shares of the company's common stock on 09/18/2025 under a Rule 10b5-1 trading plan established May 16, 2025. The reported weighted-average price for the sale was $27.5006, with execution prices ranging from $27.50 to $27.505. After the disposition, Mr. Taylor beneficially owns 396,952 shares directly and 114,213 shares indirectly through a rabbi trust. He also holds 4,456 restricted stock units that convert to common shares on vesting.

The filing discloses the sale was pre-arranged under the trading plan and offers to provide details on transaction-level pricing upon request.

Positive

• Transaction executed under a Rule 10b5-1 plan, indicating pre-arranged trading and reduced insider timing concerns
• Complete disclosure of holdings: 396,952 shares direct, 114,213 indirect (rabbi trust), and 4,456 RSUs
• Weighted-average price provided and offer for per-trade pricing, enhancing transparency

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine director sale executed under a 10b5-1 plan; holdings remain substantial and the disclosure is standard and complete.

The 1,638-share sale is small relative to Mr. Taylor's reported direct and indirect holdings (totaling 511,165 shares), indicating this transaction is likely liquidity-driven rather than a material shift in ownership. The use of a Rule 10b5-1 plan and the footnote offering transaction-level price details are proper compliance measures that reduce informational asymmetry. No options exercise or other derivative activity accompanied the sale beyond outstanding restricted stock units. Impact to investors is minimal absent other undisclosed transactions.

Corporate Governance Expert

TL;DR: Disclosure aligns with governance best practices; explicit note on 10b5-1 plan increases transparency.

The Form 4 clearly identifies the relationship of the reporting person, the plan establishment date, and provides a weighted-average price with an offer to supply per-trade pricing. Reporting of both direct and indirect holdings, plus RSUs, gives a comprehensive view of economic interest. No red flags such as insider pledging, option exercises, or large unscheduled disposals are present. From a governance perspective, this is a routine, transparent insider filing.

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

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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).

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)
09/18/2025

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	09/18/2025		S		1,638(1)	D	$27.5006(2)	396,952	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	(3)							(3)	(3)	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. The price reported n Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.50 to $27.505 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

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

	Stephen C. Taylor	09/18/2025
	** 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 did Stephen C. Taylor report on Form 4 for NGS?

He reported a sale of 1,638 shares of Natural Gas Services Group common stock on 09/18/2025 under a Rule 10b5-1 trading plan.

At what price were the NGS shares sold by Stephen C. Taylor?

The filing shows a weighted-average price of $27.5006, with execution prices ranging from $27.50 to $27.505.

How many NGS shares does Stephen C. Taylor own after the reported transaction?

After the sale he beneficially owns 396,952 shares directly and 114,213 shares indirectly via a rabbi trust.

Does Stephen C. Taylor hold any restricted stock units in NGS?

Yes. He holds 4,456 restricted stock units, each representing the right to one share upon vesting.

When was the 10b5-1 trading plan established?

The Form 4 discloses the trading plan was established on May 16, 2025.