[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 planned sale of company shares on September 26, 2025. The filing shows 7,915 shares of Common Stock were sold under a Rule 10b5-1 trading plan at a weighted average price of $28.5011, with individual trade prices ranging from $28.50 to $28.53. After the reported sale, Mr. Taylor beneficially owns 375,432 shares directly and 114,213 shares indirectly through a Rabbi Trust; he also holds 4,456 restricted stock units that represent rights to common shares upon vesting. The Form 4 discloses the sales were prearranged and offers to provide detailed per-trade quantities and prices on request.

Positive

• Sale executed under a Rule 10b5-1 plan, indicating the trades were preplanned and not opportunistic trading
• Transparent disclosure of weighted average price and price range, with offer to provide per-trade details on request
• Substantial continued ownership: 375,432 shares directly and 114,213 indirectly via a Rabbi Trust, plus 4,456 restricted stock units

Negative

• None.

Insights

Financial Analyst

TL;DR Director executed a preplanned sale of a small portion of holdings under a 10b5-1 plan; substantial ownership remains.

The sale of 7,915 shares was conducted under a Rule 10b5-1 plan established May 16, 2025, and executed at a weighted average price of $28.5011. This transaction reduced direct beneficial holdings to 375,432 shares while an additional 114,213 shares are held indirectly via a Rabbi Trust and 4,456 restricted stock units remain outstanding. From an analyst perspective, the trade appears routine and preplanned rather than opportunistic; the remaining direct and indirect holdings indicate continued meaningful ownership that limits the immediate governance or control implications.

Corporate Governance Expert

TL;DR The insider used an established 10b5-1 plan and provided transparent disclosures, consistent with strong governance practice.

The Form 4 explicitly states the sales were effected pursuant to a 10b5-1 plan established May 16, 2025, and the filer commits to supplying detailed trade-level information on request. Such disclosures align with accepted governance norms for predictable insider liquidity while preserving market transparency. The filing shows continued significant direct and indirect beneficial ownership, which suggests the director retains alignment with long-term shareholders.

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)
09/26/2025

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	09/26/2025		S		7,915(1)	D	$28.5011(2)	375,432	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 sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.50 to $28.53 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 with 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	09/26/2025
	** 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?

The filing reports a sale of 7,915 shares of NGS Common Stock on 09/26/2025 and shows remaining holdings of 375,432 shares directly and 114,213 indirectly.

Was the insider sale preplanned or spontaneous?

The sale was executed under a Rule 10b5-1 trading plan established on May 16, 2025, indicating it was preplanned.

At what price were the shares sold?

The weighted average price was $28.5011; individual trades ranged from $28.50 to $28.53.

How many restricted stock units does the reporting person hold?

The filing shows 4,456 restricted stock units, each representing the right to receive one share upon vesting.

Does the Form 4 disclose indirect ownership?

Yes. The Form 4 discloses 114,213 shares held indirectly through a Rabbi Trust.