[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 an open-market sale under a Rule 10b5-1 plan and ongoing holdings. The Form 4 shows a sale on 09/19/2025 of 63 shares of Common Stock at a price of $27.50 per share pursuant to a 10b5-1 trading plan established May 16, 2025. After the reported transaction Mr. Taylor beneficially owns 396,889 shares directly and 114,213 shares indirectly through a Rabbi Trust. He also holds 4,456 Restricted Stock Units, each representing the right to one share upon vesting.

Positive

• Transaction executed under a Rule 10b5-1 plan, which provides an affirmative defense and signals pre-planned disposition timing
• Substantial insider ownership remains: 396,889 shares held directly and 114,213 shares indirectly via a Rabbi Trust, indicating alignment with shareholders
• Equity compensation retained: 4,456 Restricted Stock Units outstanding representing future share rights

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Director executed a small plan-based sale while retaining substantial direct and indirect holdings.

The disclosure is routine: a director sold 63 shares under a pre-established Rule 10b5-1 plan, minimizing concerns about opportunistic timing. The filing quantifies significant ongoing insider ownership with 396,889 direct shares and 114,213 indirect shares in a Rabbi Trust, which aligns management incentives with shareholders. The existence of RSUs (4,456) indicates continued equity compensation exposure. No amendments or additional material securities transactions are reported.

Securities Analyst

TL;DR: Transaction is immaterial in size relative to total reported holdings but confirms planned liquidity action.

The reported sale of 63 shares at $27.50 appears nominal compared with the director's post-transaction holdings. The Form 4 explicitly attributes the sale to a Rule 10b5-1 trading plan established May 16, 2025, which provides an affirmative defense to insider trading claims. The filing also documents 4,456 RSUs and substantial indirect ownership via a Rabbi Trust, all of which are relevant to assessing insider alignment and potential future share releases through vesting.

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).

X

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^*

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)
09/19/2025

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	09/19/2025		S		63(1)	D	$27.5	396,889	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 sales 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	09/19/2025
	** 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 the Form 4 for NGS?

The Form 4 reports a sale of 63 shares of NGS common stock on 09/19/2025 at $27.50 per share and shows his post-transaction holdings.

Was the sale part of a trading plan for NGS insider Stephen C. Taylor?

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

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

Following the reported transaction he beneficially owns 396,889 shares directly and 114,213 shares indirectly through a Rabbi Trust.

Does Stephen C. Taylor hold any unvested equity in NGS?

Yes. He holds 4,456 Restricted Stock Units, each representing the right to receive one share upon vesting.

Does the Form 4 indicate any amendments or additional transactions?

No. The filing shows the transaction date as 09/19/2025 and indicates no applicable amendment date.