13D·WATCH Activist + Insider Intelligence Live feed Blog About Pilot
ISSUER PROFILE · CIK 0001084991 · CUSIP 63886Q109

NATURAL GAS SERVICES GROUP INCNGS

2 13D/G filings 1 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 2 activist filings on this issuer

Median 30d
avg —
Median 60d
avg —
Median 90d
avg —
Median 180d
avg —

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
2
2 SCHEDULE
Distinct filers
1
single filer
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
1.77
as of 2026-03-31

13D/G Filings Timeline · 2 total

FiledFormFilerStakeSharesIntent
2025-01-23 SCHEDULE Mill Road Capital III, L.P. 4.30% 530,879 view →
2025-01-16 SCHEDULE Mill Road Capital III, L.P. 6.00% 754,564 view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-03-31 250,160 1.77 +2.4%
2026-03-13 244,257 2.02 -0.4%
2026-02-27 245,138 3.18 -2.9%
2026-02-13 252,463 1.99 +25.4%
2026-01-30 201,267 1.00 -11.3%
2026-01-15 226,935 1.53 -10.8%
2025-12-31 254,311 2.92 -14.4%
2025-12-15 297,065 3.08 +15.1%

Alert me when any activist files on NATURAL GAS SERVICES GROUP INC

Free. We email you when criteria match. One-click unsubscribe in every email.

Track every activist who touches this name.

Custom alerts · full feed · daily intelligence · API. $1,500/mo. Pilots welcome.

Request a pilot →