AssetMark Inc
AMPH icon

AssetMark Inc’s Amphastar Pharmaceuticals AMPH Stock Holding History

AssetMark Inc’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 		$1.38M Buy
68,590
+14,852
+28% +$300K ﹤0.01% 1028
2026
Q1 		$1.05M Sell
53,738
-621
-1% -$15.2K ﹤0.01% 1032
2025
Q4 		$1.46M Sell
54,359
-2,128
-4% -$54.8K ﹤0.01% 933
2025
Q3 		$1.51M Buy
56,487
+12,721
+29% +$328K ﹤0.01% 891
2025
Q2 		$1M Buy
43,766
+3,229
+8% +$80.1K ﹤0.01% 922
2025
Q1 		$1.18M Sell
40,537
-1,384
-3% -$44.2K ﹤0.01% 837
2024
Q4 		$1.56M Sell
41,921
-1,985
-5% -$90.8K ﹤0.01% 764
2024
Q3 		$2.13M Buy
43,906
+3,650
+9% +$160K 0.01% 637
2024
Q2 		$1.61M Buy
40,256
+4,479
+13% +$186K 0.01% 666
2024
Q1 		$1.57M Sell
35,777
-10
-0% -$516 0.01% 632
2023
Q4 		$2.21M Buy
35,787
+4,596
+15% +$241K 0.01% 518
2023
Q3 		$1.43M Buy
31,191
+94
+0.3% +$5.13K 0.01% 560
2023
Q2 		$1.79M Buy
31,097
+1,424
+5% +$63.1K 0.01% 500
2023
Q1 		$1.11M Buy
29,673
+1,727
+6% +$56.6K ﹤0.01% 581
2022
Q4 		$783K Buy
27,946
+1,814
+7% +$52.7K ﹤0.01% 635
2022
Q3 		$734K Buy
+26,132
New +$853K ﹤0.01% 586
2018
Q1 		– Sell
-11
Closed – – 1421
2017
Q4 		$0 Buy
+11
New +$205 ﹤0.01% 1858
2017
Q1 		– Sell
-5
Closed – – 1265
2016
Q4 		$0 Buy
+5
New +$97 ﹤0.01% 1240

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

AssetMark Inc's AMPH Position: Q2 2026 in Review

AssetMark Inc increased its Amphastar Pharmaceuticals (AMPH) stake by 28% in Q2 2026, buying an estimated $300K and bringing the position to 68,590 shares worth $1.38M. The position accounts for ﹤0.01% of the portfolio, ranked #1028.

AssetMark Inc first reported a position in AMPH in Q4 2016 and has held it in 18 quarters since. The position peaked at $2.21M in Q4 2023. 211 funds tracked by Wall St. Rank hold AMPH as of Q2 2026.

  • AssetMark Inc held 68,590 shares of Amphastar Pharmaceuticals worth $1.38M as of Q2 2026.
  • AssetMark Inc bought 14,852 Amphastar Pharmaceuticals shares in Q2 2026, an estimated $300K.
  • Amphastar Pharmaceuticals made up ﹤0.01% of AssetMark Inc's portfolio in Q2 2026, its #1028 holding.
  • AssetMark Inc first reported a position in Amphastar Pharmaceuticals in Q4 2016 and has held it in 18 quarters since.
  • AssetMark Inc's Amphastar Pharmaceuticals position peaked at $2.21M in Q4 2023.
  • 211 funds tracked by Wall St. Rank held Amphastar Pharmaceuticals as of Q2 2026.

Based on AssetMark Inc's 13F filing for Q2 2026, filed 30 Jul 2026.