1/5NATURAL GAS SERVICES GROUP INC (NGS): Auditor change

Market data

Price before filing: $39.89 (2026-07-09 close, split/dividend-adjusted)
Market cap at flag: $510.0M (2026-07-10) · Latest: $393.9M (2026-10-16)

What happened next

Return from the last close before the filing date to the first close on/after the window end. Pending windows have not fully elapsed. Past performance says nothing certain about the future.

Insider trading around this filing

90 days before the flag: no open-market insider sales or purchases reported.
30 days after: none reported.

Open-market purchases and sales (Form 4 codes P and S) by officers, directors and 10% owners, by transaction date, from 2026-04-11 to 2026-08-09. Excludes option exercises, grants, gifts and tax withholding. Amended filings replace the originals; joint filings count once. Foreign private issuers do not file Form 4. Many insider sales are pre-scheduled (10b5-1 plans) and are not by themselves a sign of wrongdoing.

Verified excerpt

"(a) On July 9, 2026, Natural Gas Services Group, Inc., (the "Company") was advised by Ham, Langston & Brezina, L.L.P. ("HL&B"), the Company's independent registered public accounting firm, that HL&B completed a transaction pursuant to which, among other things, CohnReznick LLP ("CohnReznick") acquired certain assets of HL&B. In connection with the closing of this transaction, on July 9, 2026, HL&B resigned as the..."

Quoted from the filing. Source

What this means

The company changed its outside auditor (8-K Item 4.01). A dismissal or resignation, especially near an annual report or with reported disagreements, is a warning sign. Changes caused by audit firms merging are usually routine.

Type: routine (audit-firm merger)
Disagreements reported: no
Former auditor: Ham, Langston & Brezina, L.L.P. · New auditor: CohnReznick LLP

Why this score: routine: audit firm merged/was acquired