AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

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

Q4 2025

Shares 14,852 Value ($000) $398 Avg Close $25.76 Range $22.94 - $29.00

Q2 2025

Shares 9,579 Value ($000) $220 Avg Close $24.82 Range $22.64 - $29.27

Q2 2024

Shares 6,623 Value ($000) $265 Avg Close $41.44 Range $38.43 - $46.62

Q2 2015

Shares 448,532 Value ($000) $7,885 Avg Close $15.59 Range $13.55 - $18.25

Q1 2015

Shares 448,532 Value ($000) $6,710 Avg Close $13.37 Range $11.12 - $15.79

Q4 2014

Shares 1,276,577 Value ($000) $14,821 Avg Close $10.89 Range $9.76 - $12.46

Q3 2014

Shares 1,415,075 Value ($000) $16,486 Avg Close $10.42 Range $8.32 - $12.52

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	14,852	$398	$25.76	$22.94 - $29.00
Q2 2025	9,579	$220	$24.82	$22.64 - $29.27
Q2 2024	6,623	$265	$41.44	$38.43 - $46.62
Q2 2015	448,532	$7,885	$15.59	$13.55 - $18.25
Q1 2015	448,532	$6,710	$13.37	$11.12 - $15.79
Q4 2014	1,276,577	$14,821	$10.89	$9.76 - $12.46
Q3 2014	1,415,075	$16,486	$10.42	$8.32 - $12.52