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Quantbot Technologies’s Amphastar Pharmaceuticals AMPH Stock Holding History

Quantbot Technologies’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 		$38.8K Buy
+1,924
New +$38.8K ﹤0.01% 1689
2026
Q1 		– Sell
-14,515
Closed -$389K – 1682
2025
Q4 		$389K Sell
14,515
-15,248
-51% -$393K 0.01% 1027
2025
Q3 		$793K Sell
29,763
-31,192
-51% -$805K 0.02% 845
2025
Q2 		$1.4M Buy
60,955
+39,846
+189% +$989K 0.04% 651
2025
Q1 		$612K Sell
21,109
-4,345
-17% -$139K 0.02% 833
2024
Q4 		$945K Buy
+25,454
New +$1.16M 0.03% 648
2024
Q3 		– Sell
-12,430
Closed -$497K – 1422
2024
Q2 		$497K Buy
12,430
+1,482
+14% +$61.4K 0.02% 746
2024
Q1 		$481K Buy
+10,948
New +$565K 0.03% 755
2022
Q2 		– Sell
-600
Closed -$21K – 1675
2022
Q1 		$21K Buy
+600
New +$17K ﹤0.01% 1350
2021
Q2 		– Sell
-2,900
Closed -$53K – 1429
2021
Q1 		$53K Buy
2,900
+2,600
+867% +$48.3K 0.01% 996
2020
Q4 		$6K Buy
+300
New +$5.84K ﹤0.01% 1145
2019
Q4 		– Sell
-4,500
Closed -$89K – 1195
2019
Q3 		$89K Sell
4,500
-1,300
-22% -$27.1K 0.01% 858
2019
Q2 		$122K Buy
+5,800
New +$121K 0.01% 721
2017
Q1 		– Sell
-127
Closed -$2K – 1114
2016
Q4 		$2K Sell
127
-7,233
-98% -$141K ﹤0.01% 1009
2016
Q3 		$139K Buy
+7,360
New +$134K 0.02% 648
2015
Q3 		– Sell
-1,300
Closed -$22K – 1175
2015
Q2 		$22K Buy
+1,300
New +$20.3K ﹤0.01% 926

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

Quantbot Technologies's AMPH Position: Q2 2026 in Review

Quantbot Technologies opened a new position in Amphastar Pharmaceuticals (AMPH) in Q2 2026: 1,924 shares worth $38.8K. The stake represents ﹤0.01% of the portfolio and ranks #1689 among its holdings. This is a return to the name: Quantbot Technologies previously reported a position in AMPH as recently as Q4 2025.

Quantbot Technologies first reported a position in AMPH in Q2 2015 and has held it in 16 quarters since. The position peaked at $1.4M in Q2 2025. 210 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • Quantbot Technologies held 1,924 shares of Amphastar Pharmaceuticals worth $38.8K as of Q2 2026.
  • Amphastar Pharmaceuticals was a new Quantbot Technologies position in Q2 2026.
  • Amphastar Pharmaceuticals made up ﹤0.01% of Quantbot Technologies's portfolio in Q2 2026, its #1689 holding.
  • Quantbot Technologies first reported a position in Amphastar Pharmaceuticals in Q2 2015 and has held it in 16 quarters since.
  • Quantbot Technologies's Amphastar Pharmaceuticals position peaked at $1.4M in Q2 2025.
  • 210 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Quantbot Technologies's 13F filing for Q2 2026, filed 12 Aug 2026.