Illumine Investment Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Illumine Investment Management’s Portfolio AMPH Stock Details AMPH Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$550K	Sell	28,078 -250	-0.9%	-$6.12K	0.42%	74
2025 Q4	$759K	Buy	28,328 +651	+2%	+$16.8K	0.55%	60
2025 Q3	$738K	Buy	27,677 +551	+2%	+$14.2K	0.53%	65
2025 Q2	$623K	Buy	27,126 +596	+2%	+$14.8K	0.5%	65
2025 Q1	$769K	Buy	26,530 +9,481	+56%	+$303K	0.63%	46
2024 Q4	$633K	Buy	+17,049	New	+$780K	0.52%	57

Other funds holding AMPH

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

TD Asset Management Toronto, Ontario, Canada $123B AUM 34.51% 1-Year Est. Return

Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

BTW

Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return

Illumine Investment Management's AMPH Position: Q1 2026 in Review

Illumine Investment Management reduced its Amphastar Pharmaceuticals (AMPH) stake by 0.88% in Q1 2026, selling an estimated $6.12K and leaving 28,078 shares worth $550K. The position accounts for 0.42% of the portfolio, ranked #74.

Illumine Investment Management first reported a position in AMPH in Q4 2024 and has held it in 6 quarters since. The position peaked at $769K in Q1 2025. 215 funds tracked by Wall St. Rank hold AMPH as of Q1 2026.

Illumine Investment Management held 28,078 shares of Amphastar Pharmaceuticals worth $550K as of Q1 2026.
Illumine Investment Management sold 250 Amphastar Pharmaceuticals shares in Q1 2026, an estimated $6.12K.
Amphastar Pharmaceuticals made up 0.42% of Illumine Investment Management's portfolio in Q1 2026, its #74 holding.
Illumine Investment Management first reported a position in Amphastar Pharmaceuticals in Q4 2024 and has held it in 6 quarters since.
Illumine Investment Management's Amphastar Pharmaceuticals position peaked at $769K in Q1 2025.
215 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2026.

Based on Illumine Investment Management's 13F filing for Q1 2026, filed 4 May 2026.