Simplex Trading
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Simplex Trading’s Amphastar Pharmaceuticals AMPH Stock Holding History

Simplex Trading’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 		$10.1K Sell
500
-13,500
-96% -$272K ﹤0.01% 7687
2026
Q1 		$274K Buy
+14,000
New +$343K ﹤0.01% 3920
2025
Q4 		– Sell
-200
Closed -$5K – 8424
2025
Q3 		$5K Hold
200
– – ﹤0.01% 8269
2025
Q2 		$4K Sell
200
-1,000
-83% -$24.8K ﹤0.01% 7803
2025
Q1 		$34K Buy
1,200
+400
+50% +$12.8K ﹤0.01% 6123
2024
Q4 		$29K Sell
800
-1,000
-56% -$45.7K ﹤0.01% 6378
2024
Q3 		$87K Buy
1,800
+1,100
+157% +$48.3K ﹤0.01% 5368
2024
Q2 		$28K Sell
700
-3,100
-82% -$128K ﹤0.01% 6597
2024
Q1 		$166K Sell
3,800
-100
-3% -$5.17K ﹤0.01% 5052
2023
Q4 		$241K Buy
3,900
+2,800
+255% +$147K ﹤0.01% 4476
2023
Q3 		$50K Buy
1,100
+700
+175% +$38.2K ﹤0.01% 5796
2023
Q2 		$22K Sell
400
-1,000
-71% -$44.3K ﹤0.01% 6656
2023
Q1 		$52K Sell
1,400
-100
-7% -$3.28K ﹤0.01% 5868
2022
Q4 		$42K Sell
1,500
-19,000
-93% -$552K ﹤0.01% 6076
2022
Q3 		$576K Buy
20,500
+7,500
+58% +$245K ﹤0.01% 3304
2022
Q2 		$452K Buy
13,000
+3,200
+33% +$114K ﹤0.01% 3556
2022
Q1 		$351K Sell
9,800
-2,700
-22% -$76.6K ﹤0.01% 4320
2021
Q4 		$291K Buy
+12,500
New +$256K ﹤0.01% 4614
2020
Q1 		– Sell
-17
Closed -$32K – 7528
2019
Q4 		$32K Buy
17
+7
+70% +$134 ﹤0.01% 5591
2019
Q3 		$19K Hold
10
– – ﹤0.01% 5828
2019
Q2 		$21K Buy
+10
New +$209 ﹤0.01% 5560
2018
Q2 		– Sell
-50
Closed -$44K – 7312
2018
Q1 		$44K Buy
+50
New +$940 ﹤0.01% 2560
2016
Q1 		– Sell
-20
Closed -$1K – 5513
2015
Q4 		$1K Buy
+20
New +$264 ﹤0.01% 4763

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

Simplex Trading's AMPH Position: Q2 2026 in Review

Simplex Trading sold out of Amphastar Pharmaceuticals (AMPH) in Q2 2026, closing a stake of 262 shares — an estimated $5.29K sold.

Simplex Trading first reported a position in AMPH in Q3 2016 and held it in 19 quarters. The position peaked at $277K in Q3 2016. 212 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • Simplex Trading reported no remaining Amphastar Pharmaceuticals position as of Q2 2026 after selling out during the quarter.
  • Simplex Trading sold 262 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $5.29K.
  • Simplex Trading first reported a position in Amphastar Pharmaceuticals in Q3 2016 and held it in 19 quarters.
  • Simplex Trading's Amphastar Pharmaceuticals position peaked at $277K in Q3 2016.
  • 212 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.