Company · Ownership research

NATURAL GAS SERVICES GROUP INC NGS

CIK 0001084991

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 38 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-03.

Insider purchases & sales

Purchased: $346.67K
Sold: $11.59M

Sep 1, 2023 – Sep 3, 2026
Available records · partial months are marked ·

202510 of 24 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-12-11	Taylor Stephen Charles Director	Sale	$335.40K 10,000 shares sold	3.50% sold Direct holding	▾
2025-12-10	Taylor Stephen Charles Director	Sale	$331.60K 10,000 shares sold	3.38% sold Direct holding	▾
2025-12-08	HOLLEY JEAN K Director	Purchase	$70.17K 2,190 shares bought	17.95% added Direct holding	▾
2025-12-08	HOLLEY JEAN K Director	Purchase	$29.92K 935 shares bought	8.30% added Direct holding	▾
2025-12-04	Taylor Stephen Charles Director	Sale	$642.40K 20,000 shares sold	6.34% sold Direct holding	▾
2025-11-20	Taylor Stephen Charles Director	Sale	$313.70K 10,000 shares sold	3.07% sold Direct holding	▾
2025-11-19	Taylor Stephen Charles Director	Sale	$303.10K 10,000 shares sold	2.98% sold Direct holding	▾
2025-11-17	Taylor Stephen Charles Director	Sale10b5-1 footnote	$310.07K 10,000 shares sold	2.89% sold Direct holding	▾
2025-11-07	Taylor Stephen Charles Director	Sale10b5-1 footnote	$324.05K 11,152 shares sold	2.97% sold Direct holding	▾
2025-11-06	Taylor Stephen Charles Director	Sale10b5-1 footnote	$2.90K 100 shares sold	0.03% sold Direct holding	▾

Showing 24 / 24 record groups in 2025. The complete set is available through the API.

NATURAL GAS SERVICES GROUP INC · NGS

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 24 of 24 purchase / sale groups and 30 of 38 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"NGS","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.