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Quadrant Capital Group’s Amphastar Pharmaceuticals AMPH Stock Holding History

Quadrant Capital Group’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 		$22.2K Sell
1,131
-1,603
-59% -$39.2K ﹤0.01% 1969
2025
Q4 		$73.2K Sell
2,734
-342
-11% -$8.81K ﹤0.01% 1573
2025
Q3 		$82K Buy
+3,076
New +$79.4K ﹤0.01% 1521
2025
Q2 		– Sell
-8,277
Closed -$240K – 1387
2025
Q1 		$240K Buy
8,277
+7,537
+1,019% +$241K 0.01% 1211
2024
Q4 		$27.5K Hold
740
– – ﹤0.01% 1740
2024
Q3 		$35.9K Sell
740
-53
-7% -$2.33K ﹤0.01% 1625
2024
Q2 		$31.7K Sell
793
-10
-1% -$414 ﹤0.01% 1647
2024
Q1 		$35.3K Sell
803
-223
-22% -$11.5K ﹤0.01% 1580
2023
Q4 		$63.5K Buy
1,026
+223
+28% +$11.7K 0.01% 1255
2023
Q3 		$36.9K Sell
803
-19
-2% -$1.04K ﹤0.01% 1412
2023
Q2 		$47.2K Buy
822
+10
+1% +$443 ﹤0.01% 1287
2023
Q1 		$30.4K Buy
812
+511
+170% +$16.8K ﹤0.01% 1484
2022
Q4 		$8.43K Sell
301
-103
-25% -$2.99K ﹤0.01% 2036
2022
Q3 		$11K Buy
404
+177
+78% +$5.78K ﹤0.01% 1826
2022
Q2 		$8K Sell
227
-167
-42% -$5.96K ﹤0.01% 1758
2022
Q1 		$14K Buy
394
+149
+61% +$4.22K ﹤0.01% 1482
2021
Q4 		$6K Sell
245
-111
-31% -$2.27K ﹤0.01% 1791
2021
Q3 		$7K Buy
356
+248
+230% +$4.86K ﹤0.01% 1733
2021
Q2 		$2K Sell
108
-10
-8% -$188 ﹤0.01% 2067
2021
Q1 		$2K Buy
118
+63
+115% +$1.17K ﹤0.01% 2020
2020
Q4 		$1K Hold
55
– – ﹤0.01% 2044
2020
Q3 		$1K Hold
55
– – ﹤0.01% 1908
2020
Q2 		$1K Hold
55
– – ﹤0.01% 2003
2020
Q1 		$1K Buy
+55
New +$957 ﹤0.01% 1947
2019
Q3 		– Sell
-2,636
Closed -$54K – 2286
2019
Q2 		$54K Hold
2,636
– – 0.01% 1181
2019
Q1 		$53K Buy
+2,636
New +$59.1K 0.01% 1182

Other funds holding AMPH

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
State Street
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
TD Asset Management Toronto, Ontario, Canada $123B AUM 34.51% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
BTW
Boston Trust Walden Boston, Massachusetts $12.2B AUM 12.45% 1-Year Est. Return

Quadrant Capital Group's AMPH Position: Q1 2026 in Review

Quadrant Capital Group reduced its Amphastar Pharmaceuticals (AMPH) stake by 59% in Q1 2026, selling an estimated $39.2K and leaving 1,131 shares worth $22.2K. The position accounts for ﹤0.01% of the portfolio, ranked #1969.

Quadrant Capital Group first reported a position in AMPH in Q1 2019 and has held it in 26 quarters since. The position peaked at $240K in Q1 2025. 215 funds tracked by Wall St. Rank hold AMPH as of Q1 2026.

  • Quadrant Capital Group held 1,131 shares of Amphastar Pharmaceuticals worth $22.2K as of Q1 2026.
  • Quadrant Capital Group sold 1,603 Amphastar Pharmaceuticals shares in Q1 2026, an estimated $39.2K.
  • Amphastar Pharmaceuticals made up ﹤0.01% of Quadrant Capital Group's portfolio in Q1 2026, its #1969 holding.
  • Quadrant Capital Group first reported a position in Amphastar Pharmaceuticals in Q1 2019 and has held it in 26 quarters since.
  • Quadrant Capital Group's Amphastar Pharmaceuticals position peaked at $240K in Q1 2025.
  • 215 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q1 2026.

Based on Quadrant Capital Group's 13F filing for Q1 2026, filed 11 May 2026.