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Natural Gas Services director corrects share holdings

NATURAL GAS SERVICES GROUP INC (NGS) director Donald J. Tringali filed an amended Form 4 to correct how his beneficial ownership is allocated between direct holdings and a Rabbi Trust.

(Neutral)
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

NATURAL GAS SERVICES GROUP INC (NGS) director Donald J. Tringali filed an amended Form 4 to correct how his beneficial ownership is allocated between direct holdings and a Rabbi Trust. The amendment clarifies that, after 4,010 shares vested on June 8, 2026, his holdings should be reported as 5,965 shares held directly and 13,753 shares held indirectly through a Rabbi Trust, rather than the misreported 1,955 direct and 17,763 indirect shares. The amendment states that no other information from the original Form 4 is changed and does not report any new purchase, sale, or other transaction.

Positive

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Negative

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Insider TRINGALI DONALD J
Role Director
Type Security Shares Price Value
holding Common Stock F1 -- -- --
holding Common Stock F1 -- -- --
Holdings After Transaction: Common Stock — 5,965 shares (Direct); Common Stock — 13,753 shares (Indirect, Rabbi Trust)
Footnotes (1)
  1. F1. This filing amends the Form 4 filed by the Reporting Person on June 9, 2026 (the "Original Filing"). In the Original Filing, due to an administrative error, the Reporting Person's beneficial ownership indicated 17,763 shares of the Issuer's common stock were indirectly owned through a Rabbi Trust. In actuality, 4,010 shares that vested on June 8, 2026, were deposited to a direct holding account as opposed to the Rabbi Trust (indirect holding). Accordingly, the direct holdings should have been 5,965 shares as opposed to 1,955 shares and the indirect holdings should have been 13,753 shares as opposed to 17,763 shares. This amendment is being filed to report the correct nature of the beneficial ownership. No other changes have been made to the information contained in the Original Filing.
Direct holdings after correction 5,965 shares Common Stock beneficially owned directly by Donald J. Tringali after the June 8, 2026 correction
Indirect holdings after correction 13,753 shares Common Stock beneficially owned indirectly through a Rabbi Trust after the June 8, 2026 correction
Shares previously reported as indirectly held 17,763 shares Amount incorrectly shown as indirectly owned through a Rabbi Trust in the original Form 4
Direct holdings previously reported 1,955 shares Directly held shares figure in the original Form 4 before this correction
Shares that vested June 8, 2026 4,010 shares Vested shares deposited to a direct holding account instead of the Rabbi Trust
beneficial ownership financial
"the Reporting Person's beneficial ownership indicated 17,763 shares of the Issuer's common stock"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Rabbi Trust financial
"shares of the Issuer's common stock were indirectly owned through a Rabbi Trust"
A rabbi trust is a special account a company sets up to hold promised future pay for executives, like bonus or retirement money, so those employees can see there are funds earmarked for them. It matters to investors because it signals the company’s commitment to keep key people, but the money is still part of the company’s assets and can be claimed by creditors if the company goes bankrupt—think of it as a labeled jar that isn’t completely off-limits.
Form 4 regulatory
"This filing amends the Form 4 filed by the Reporting Person"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
indirect holdings financial
"the indirect holdings should have been 13,753 shares as opposed to 17,763 shares"
direct holdings financial
"the direct holdings should have been 5,965 shares as opposed to 1,955 shares"

FAQ

What does the amended Form 4/A for NGS report about Donald J. Tringali's holdings?

The amendment reports that Donald J. Tringali beneficially owns 5,965 NGS shares directly and 13,753 shares indirectly through a Rabbi Trust, correcting previously misreported amounts in the original Form 4 filed June 9, 2026.

Did the NGS Form 4/A disclose any new stock purchases or sales by the director?

No. The Form 4/A states it is filed to correct the nature of beneficial ownership between direct and Rabbi Trust holdings and that no other changes were made to the information in the original filing.

What was the error corrected in Donald J. Tringali's original NGS Form 4?

The original Form 4 showed 17,763 NGS shares indirectly owned through a Rabbi Trust and 1,955 directly. The amendment explains that 4,010 vested shares were actually deposited to a direct holding account, so the correct totals are 5,965 direct and 13,753 indirect.

How many NGS shares vested on June 8, 2026, according to the Form 4/A footnote?

The footnote states that 4,010 NGS shares vested on June 8, 2026 and were deposited to a direct holding account rather than to the Rabbi Trust, prompting the correction of direct and indirect holdings.

Does the NGS Form 4/A indicate trades under a Rule 10b5-1 plan?

No. The filing does not report that the transactions were made under a Rule 10b5-1 trading plan, and its stated purpose is limited to correcting the classification of existing holdings.

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SEC Form 4
FORM 4UNITED 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*
TRINGALI DONALD J

(Last)(First)(Middle)
C/O NATURAL GAS SERVICES GROUP INC
404 VETERANS AIRPARK LANE SUITE 300

(Street)
MIDLAND TEXAS 79705

(City)(State)(Zip)

UNITED STATES

(Country)
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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/08/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
06/09/2026
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)
CodeVAmount(A) or (D)Price
Common Stock5,965(1)D
Common Stock13,753(1)IRabbi 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. This filing amends the Form 4 filed by the Reporting Person on June 9, 2026 (the "Original Filing"). In the Original Filing, due to an administrative error, the Reporting Person's beneficial ownership indicated 17,763 shares of the Issuer's common stock were indirectly owned through a Rabbi Trust. In actuality, 4,010 shares that vested on June 8, 2026, were deposited to a direct holding account as opposed to the Rabbi Trust (indirect holding). Accordingly, the direct holdings should have been 5,965 shares as opposed to 1,955 shares and the indirect holdings should have been 13,753 shares as opposed to 17,763 shares. This amendment is being filed to report the correct nature of the beneficial ownership. No other changes have been made to the information contained in the Original Filing.
Donal J. Tringali09/03/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)