NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

Calamos Advisors LLC's Holding History (CIK: 0001316507)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 20,754 Value ($000) $698 Avg Close $29.70 Range $25.36 - $34.47

Q2 2025

Shares 8,210 Value ($000) $212 Avg Close $22.21 Range $16.55 - $27.54

Q1 2025

Shares 12,504 Value ($000) $275 Avg Close $25.04 Range $20.01 - $29.42

Q4 2024

Shares 10,409 Value ($000) $279 Avg Close $23.22 Range $18.21 - $28.20

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	20,754	$698	$29.70	$25.36 - $34.47
Q2 2025	8,210	$212	$22.21	$16.55 - $27.54
Q1 2025	12,504	$275	$25.04	$20.01 - $29.42
Q4 2024	10,409	$279	$23.22	$18.21 - $28.20