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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
Q2 		– Sell
-1,131
Closed -$22.2K – 1303
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 $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Quadrant Capital Group's AMPH Position: Q2 2026 in Review

Quadrant Capital Group sold out of Amphastar Pharmaceuticals (AMPH) in Q2 2026, closing a stake of 1,131 shares — an estimated $22.2K sold.

Quadrant Capital Group first reported a position in AMPH in Q1 2019 and held it in 26 quarters. The position peaked at $240K in Q1 2025. 211 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • Quadrant Capital Group reported no remaining Amphastar Pharmaceuticals position as of Q2 2026 after selling out during the quarter.
  • Quadrant Capital Group sold 1,131 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $22.2K.
  • Quadrant Capital Group first reported a position in Amphastar Pharmaceuticals in Q1 2019 and held it in 26 quarters.
  • Quadrant Capital Group's Amphastar Pharmaceuticals position peaked at $240K in Q1 2025.
  • 211 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Quadrant Capital Group's 13F filing for Q2 2026, filed 14 Aug 2026.