Natural Gas Services Group (NGS) director Stephen Taylor reports 20,000-share sale and holdings update

Rhea-AI Filing Summary

Natural Gas Services Group, Inc. (NGS) director Stephen C. Taylor reported stock sales and updated holdings. On December 10, 2025, he sold 10,000 shares of common stock at a weighted-average price of $33.16, and on December 11, 2025 he sold another 10,000 shares at a weighted-average price of $33.54. The filing notes these prices reflect multiple trades within stated ranges, and detailed trade data is available upon request. After these transactions, Taylor beneficially owns 275,432 shares directly and 114,625 shares indirectly through a Rabbi Trust, along with 4,456 restricted stock units that each convert into one share of common stock upon vesting.

Insider Trade Summary

Net Seller: 20,000 shares ($667,000)

Net Sell 4 txns

Insider Taylor Stephen Charles

Role Director

Sold 20,000 shs ($667K)

Type	Security	Shares	Price	Value
Sale	Common Stock	10,000	$33.54	$335K
Sale	Common Stock	10,000	$33.16	$332K
holding	Restricted Stock Units	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 275,432 shares (Direct); Restricted Stock Units — 4,456 shares (Direct); Common Stock — 114,625 shares (Indirect, Rabbi Trust)

Footnotes (1)

1. The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.015 to $33.45 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. The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.50 to $33.72 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. Not applicable. Each Restricted Stock Unit represents the right to receive one share of the Issuer's common stock upon vesting.

Form 4 Insider Transactions: What Each Field Means →

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).

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)
12/10/2025

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	12/10/2025		S		10,000	D	$33.16(1)	285,432	D
Common Stock	12/11/2025		S		10,000	D	$33.54(2)	275,432	D
Common Stock								114,625	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 price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.015 to $33.45 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.

2. The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.50 to $33.72 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	12/12/2025
	** 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 NGS director Stephen C. Taylor report?

Stephen C. Taylor, a director of Natural Gas Services Group (NGS), reported open-market sales of the company’s common stock on December 10 and 11, 2025, along with his updated ownership positions.

How many NGS shares did Stephen C. Taylor sell in December 2025 and at what prices?

Taylor sold 10,000 shares of NGS common stock at a weighted-average price of $33.16 on December 10, 2025, and 10,000 shares at a weighted-average price of $33.54 on December 11, 2025. Each weighted-average price reflects multiple trades within a specified price range.

What are the updated NGS share holdings of Stephen C. Taylor after these transactions?

After the reported sales, Taylor beneficially owns 275,432 shares of NGS common stock directly and 114,625 shares indirectly through a Rabbi Trust.

What price ranges did the NGS stock sales cover for Stephen C. Taylor?

For the December 10, 2025 sale, the weighted-average price of $33.16 reflects trades between $33.015 and $33.45. For the December 11, 2025 sale, the weighted-average price of $33.54 reflects trades between $33.50 and $33.72.

What are the restricted stock units (RSUs) reported by Stephen C. Taylor at NGS?

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

Is Stephen C. Taylor a large shareholder or insider at Natural Gas Services Group (NGS)?

Yes. In the filing he is identified as a director of Natural Gas Services Group, Inc., and the form is filed as a Form 4 by one reporting person, reflecting insider status.